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Thomassen EE, Sigsgaard EE, Jensen MR, Olsen K, Hansen MDD, Thomsen PF. Environmental DNA metabarcoding reveals temporal dynamics but functional stability of arthropod communities in cattle dung. J Anim Ecol 2024; 93:1003-1021. [PMID: 38864368 DOI: 10.1111/1365-2656.14119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 05/17/2024] [Indexed: 06/13/2024]
Abstract
Terrestrial invertebrates are highly important for the decomposition of dung from large mammals. Mammal dung has been present in many of Earth's ecosystems for millions of years, enabling the evolution of a broad diversity of dung-associated invertebrates that process various components of the dung. Today, large herbivorous mammals are increasingly introduced to ecosystems with the aim of restoring the ecological functions formerly provided by their extinct counterparts. However, we still know little about the ecosystem functions and nutrient flows in these rewilded ecosystems, including the dynamics of dung decomposition. In fact, the succession of insect communities in dung is an area of limited research attention also outside a rewilding context. In this study, we use environmental DNA metabarcoding of dung from rewilded Galloway cattle in an experimental set-up to investigate invertebrate communities and functional dynamics over a time span of 53 days, starting from the time of deposition. We find a strong signal of successional change in community composition, including for the species that are directly dependent on dung as a resource. While several of these species were detected consistently across the sampling period, others appeared confined to either early or late successional stages. We believe that this is indicative of evolutionary adaptation to a highly dynamic resource, with species showing niche partitioning on a temporal scale. However, our results show consistently high species diversity within the functional groups that are directly dependent on dung. Our findings of such redundancy suggest functional stability of the dung-associated invertebrate community, with several species ready to fill vacant niches if other species disappear. Importantly, this might also buffer the ecosystem functions related to dung decomposition against environmental change. Interestingly, alpha diversity peaked after approximately 20-25 days in both meadow and pasture habitats, and did not decrease substantially during the experimental period, probably due to preservation of eDNA in the dung after the disappearance of visiting invertebrates, and from detection of tissue remains and cryptic life stages.
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Affiliation(s)
| | | | - Mads Reinholdt Jensen
- Department of Biology, Aarhus University Denmark, Aarhus C, Denmark
- Norwegian College of Fishery Science, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Kent Olsen
- Department of Research and Collections, Natural History Museum Aarhus, Aarhus C, Denmark
| | - Morten D D Hansen
- Department of Research and Collections, Natural History Museum Aarhus, Aarhus C, Denmark
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2
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DiBattista JD, Fowler AM, Shalders TC, Williams RJ, Wilkinson S. Tree of life metabarcoding can serve as a biotic benchmark for shifting baselines in urbanized estuaries. ENVIRONMENTAL RESEARCH 2024; 258:119454. [PMID: 38906450 DOI: 10.1016/j.envres.2024.119454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/23/2024]
Abstract
Urbanization of estuaries drastically changed existing shorelines and bathymetric contours, in turn modifying habitat for marine foundational species that host critical biodiversity. And yet we lack approaches to characterize a significant fraction of the biota that inhabit these ecosystems on time scales that align with rates of urbanization. Environmental DNA (or eDNA) metabarcoding that combines multiple assays targeting a broad range of taxonomic groups can provide a solution, but we need to determine whether the biological communities it detects ally with different habitats in these changing aquatic environments. In this study, we tested whether tree of life metabarcoding (ToL-metabarcoding) data extracted from filtered seawater samples correlated with four known geomorphic habitat zones across a heavily urbanized estuary (Sydney Harbour, Australia). Using this method, we substantially expanded our knowledge on the composition and spatial distribution of marine biodiversity across the tree of life in Sydney Harbour, particularly for organisms where existing records are sparse. Excluding terrestrial DNA inputs, we identified significant effects of both distance from the mouth of Sydney Harbour and geomorphic zone on biological community structure in the ToL-metabarcoding dataset (entire community), as well as in each of the taxonomic subgroups that we considered (fish, macroinvertebrates, algae and aquatic plants, bacteria). This effect appeared to be driven by taxa as a collective versus a few individual taxa, with each taxon explaining no more than 0.62% of the variation between geomorphic zones. Similarly, taxonomic richness was significantly higher within geomorphic zones with large sample sizes, but also decreased by 1% with each additional kilometer from the estuary mouth, a result consistent with a reduction in tidal inputs and available habitat in upper catchments. Based on these results, we suggest that ToL-metabarcoding can be used to benchmark biological monitoring in other urbanized estuaries globally, and in Sydney Harbour at future time points based on detection of bioindicators across the tree of life. We also suggest that robust biotic snapshots can be archived following extensive curation of taxonomic assignments that incorporates ecological affinities, supported by records from relevant and regional biodiversity repositories.
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Affiliation(s)
- Joseph D DiBattista
- School of Environment and Science, Griffith University, Southport, QLD, 4222, Australia; Australian Museum Research Institute, Australian Museum, Sydney, NSW, 2010, Australia.
| | - Ashley M Fowler
- New South Wales Department of Primary Industries, Sydney Institute of Marine Science, Mosman, NSW, 2088, Australia.
| | - Tanika C Shalders
- Faculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, 2450, Australia.
| | - Robert J Williams
- New South Wales Department of Primary Industries, Fisheries (retired), Australia.
| | - Shaun Wilkinson
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6012, New Zealand.
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3
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Oliveira HFM, Freire-Jr GB, Silva DC, Mata VA, Abra FD, Camargo NFD, Araujo Goebel LG, Longo GR, Silva JM, Colli GR, Domingos FMCB. Barcoding Brazilian mammals to monitor biological diversity and threats: Trends, perspectives, and knowledge gaps. ENVIRONMENTAL RESEARCH 2024; 258:119374. [PMID: 38885824 DOI: 10.1016/j.envres.2024.119374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 05/11/2024] [Accepted: 06/05/2024] [Indexed: 06/20/2024]
Abstract
DNA barcoding and environmental DNA (eDNA) represent significant advances for biomonitoring the world's biodiversity and its threats. However, these methods are highly dependent on the presence of species sequences on molecular databases. Brazil is one of the world's largest and most biologically diverse countries. However, many knowledge gaps still exist for describing, identifying, and monitoring of mammalian biodiversity using molecular methods. We aimed to unravel the patterns of the presence of Brazilian mammal species on molecular databases to improve our understanding of how effectively it would be to monitor them using DNA barcoding and environmental DNA, and contribute to mammalian conservation. We foundt many gaps in molecular databases, with many taxa being poorly represented, particularly from Amazonia, the order Lagomorpha, and arboreal, gomivorous, near extinct, and illegally traded species. Moreover, our analyses revealed that species description year was the most important factor determining the probability of a species to being sequenced. Primates are the group with the highest number of species considered a priority for sequencing due to their high level of combined threats. We highlight where investments are needed to fill knowledge gaps and increase the representativity of species on molecular databases to enable a better monitoring ability of Brazilian mammals encompassing different traits using DNA barcoding and environmental DNA.
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Affiliation(s)
- Hernani Fernandes Magalhães Oliveira
- Departamento de Zoologia, Universidade Federal do Paraná - UFPR, Curitiba, Brazil; Departamento de Zoologia, Universidade de Brasília - UnB, Brasília, Brazil; Knowledge Center for Biodiversity, Belo Horizonte, MG, 31270-901, Brazil.
| | - Geraldo Brito Freire-Jr
- Departamento de Ecologia, Universidade de Brasília - UnB, Brasília, Brazil; Department of Biology, University of Nevada - UNR, Reno, USA
| | - Daiana Cardoso Silva
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Nova Xavantina, Brazil
| | - Vanessa Alves Mata
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, Vila do Conde, Portugal; BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, Vairão, Vila do Conde, Portugal
| | - Fernanda Delborgo Abra
- Smithsonian National Zoo and Conservation Biology Institute-Center for Conservation and Sustainability, Washington, DC, USA; ViaFAUNA Estudos Ambientais, São Paulo, SP, Brazil; Instituto Pró-Carnívoros, Atibaia, SP, Brazil
| | | | - L G Araujo Goebel
- Programa de Pós-graduação em Ciências Ambientais, Universidade do Estado de Mato Grosso - UNEMAT, Cáceres, Brazil
| | - Gabriela Rodrigues Longo
- Programa de Pós-graduação em Ensino de Ciências, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, Brazil
| | - Joaquim Manoel Silva
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Nova Xavantina, Brazil
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4
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Schols R, Smitz N, Vanderheyden A, Huyse T. Expanding the swimmer's itch pool of the Benelux: a first record of the neurotropic Trichobilharzia regenti and potential link to human infection. Parasit Vectors 2024; 17:126. [PMID: 38481352 PMCID: PMC10938770 DOI: 10.1186/s13071-024-06218-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/27/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND Swimmer's itch, an allergic contact dermatitis caused by avian and mammalian blood flukes, is a parasitic infection affecting people worldwide. In particular, avian blood flukes of the genus Trichobilharzia are infamous for their role in swimmer's itch cases. These parasites infect waterfowl as a final host, but incidental infections by cercariae in humans are frequently reported. Upon accidental infections of humans, parasite larvae will be recognized by the immune system and destroyed, leading to painful itchy skin lesions. However, one species, Trichobilharzia regenti, can escape this response in experimental animals and reach the spinal cord, causing neuroinflammation. In the last few decades, there has been an increase in case reports across Europe, making it an emerging zoonosis. METHODS Following a reported case of swimmer's itch in Kampenhout in 2022 (Belgium), the transmission site consisting of a private pond and an adjacent creek was investigated through a malacological and parasitological survey. RESULTS Six snail species were collected, including the widespread Ampullaceana balthica, a well-known intermediate host for Trichobilharzia parasites. Shedding experiments followed by DNA barcoding revealed a single snail specimen to be infected with T. regenti, a new species record for Belgium and by extension the Benelux. Moreover, it is the most compelling case to date of the link between this neurotropic parasite and cercarial dermatitis. Additionally, an Echinostomatidae sp. and Notocotylus sp. were isolated from two other specimens of A. balthica. However, the lack of reference DNA sequences for these groups in the online repositories prevented genus- and species-level identification, respectively. CONCLUSIONS The presence of T. regenti in Belgium might have severe clinical implications and its finding highlights the need for increased vigilance and diagnostic awareness among medical professionals. The lack of species-level identification of the other two parasite species showcases the barcoding void for trematodes. Overall, these findings demonstrate the need for a Belgian framework to rapidly detect and monitor zoonotic outbreaks of trematode parasites within the One Health context.
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Affiliation(s)
- Ruben Schols
- Department of Biology & BopCo, Royal Museum for Central Africa, Tervuren, Belgium.
- Laboratory of Aquatic Biology, KU Leuven, Campus Kortrijk, Kortrijk, Belgium.
| | - Nathalie Smitz
- Department of Biology & BopCo, Royal Museum for Central Africa, Tervuren, Belgium
| | - Ann Vanderheyden
- BopCo, Royal Belgian Institute of Natural Sciences, Brussels, Belgium
| | - Tine Huyse
- Department of Biology & BopCo, Royal Museum for Central Africa, Tervuren, Belgium
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5
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Schindel DE, Page RMP. Creating Virtuous Cycles for DNA Barcoding: A Case Study in Science Innovation, Entrepreneurship, and Diplomacy. Methods Mol Biol 2024; 2744:7-32. [PMID: 38683309 DOI: 10.1007/978-1-0716-3581-0_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
This chapter on the history of the DNA barcoding enterprise attempts to set the stage for the more scholarly contributions in this volume by addressing the following questions. How did the DNA barcoding enterprise begin? What were its goals, how did it develop, and to what degree are its goals being realized? We have taken a keen interest in the barcoding movement and its relationship to taxonomy, collections, and biodiversity informatics more broadly considered. This chapter integrates our two different perspectives on barcoding. DES was the Executive Secretary of the Consortium for the Barcode of Life from 2004 to 2017, with the mission to support the success of DNA barcoding without being directly involved in generating barcode data. RDMP viewed barcoding as an important entry into the landscape of biodiversity data, with many potential linkages to other components of that landscape. We also saw it as a critical step toward the era of international genomic research that was sure to follow. Like the Mercury Program that paved the way for lunar landings by the Apollo Program, we saw DNA barcoding as the proving grounds for the interdisciplinary and international cooperation that would be needed for success of whole-genome research.
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Affiliation(s)
| | - Roderic M P Page
- School of Biodiversity, One Health, and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Gwiazdowski R. Principles for Constructing DNA Barcode Reference Libraries. Methods Mol Biol 2024; 2744:491-502. [PMID: 38683337 DOI: 10.1007/978-1-0716-3581-0_29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
All DNA barcode methods rely on reference sequences linked to well-curated voucher specimens. Definitions for and locations of DNA barcode reference libraries are not standardized, and vary throughout the literature. Standardizing, and centralizing reference specimens would provide an unambiguous source, analogous to reference genomes, to reproduce identifications and improve a library. This chapter proposes a working definition of a DNA barcode reference library, consistent with DNA barcode data standards, along with principles and methods to consider when producing or using such a library. These methods allow explicit traceback to sequence-sources which elevate the value of voucher specimens, and create a potential for community curation.
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Affiliation(s)
- Rodger Gwiazdowski
- Department of Environmental Conservation, University of Massachusetts, Amherst, MA, USA.
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Nanglu K, de Carle D, Cullen TM, Anderson EB, Arif S, Castañeda RA, Chang LM, Iwama RE, Fellin E, Manglicmot RC, Massey MD, Astudillo‐Clavijo V. The nature of science: The fundamental role of natural history in ecology, evolution, conservation, and education. Ecol Evol 2023; 13:e10621. [PMID: 37877102 PMCID: PMC10591213 DOI: 10.1002/ece3.10621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/20/2023] [Accepted: 09/27/2023] [Indexed: 10/26/2023] Open
Abstract
There is a contemporary trend in many major research institutions to de-emphasize the importance of natural history education in favor of theoretical, laboratory, or simulation-based research programs. This may take the form of removing biodiversity and field courses from the curriculum and the sometimes subtle maligning of natural history research as a "lesser" branch of science. Additional threats include massive funding cuts to natural history museums and the maintenance of their collections, the extirpation of taxonomists across disciplines, and a critical under-appreciation of the role that natural history data (and other forms of observational data, including Indigenous knowledge) play in the scientific process. In this paper, we demonstrate that natural history knowledge is integral to any competitive science program through a comprehensive review of the ways in which they continue to shape modern theory and the public perception of science. We do so by reviewing how natural history research has guided the disciplines of ecology, evolution, and conservation and how natural history data are crucial for effective education programs and public policy. We underscore these insights with contemporary case studies, including: how understanding the dynamics of evolutionary radiation relies on natural history data; methods for extracting novel data from museum specimens; insights provided by multi-decade natural history programs; and how natural history is the most logical venue for creating an informed and scientifically literate society. We conclude with recommendations aimed at students, university faculty, and administrators for integrating and supporting natural history in their mandates. Fundamentally, we are all interested in understanding the natural world, but we can often fall into the habit of abstracting our research away from its natural contexts and complexities. Doing so risks losing sight of entire vistas of new questions and insights in favor of an over-emphasis on simulated or overly controlled studies.
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Affiliation(s)
- Karma Nanglu
- Museum of Comparative Zoology and Department of Organismic and Evolutionary BiologyHarvard UniversityCambridgeMassachusettsUSA
| | - Danielle de Carle
- Department of Ecology and Evolutionary BiologyUniversity of TorontoTorontoOntarioCanada
- Department of Invertebrate ZoologyRoyal Ontario MuseumTorontoOntarioCanada
| | - Thomas M. Cullen
- Department of GeosciencesAuburn UniversityAuburnAlabamaUSA
- Negaunee Integrative Research CenterField Museum of Natural HistoryChicagoIllinoisUSA
| | - Erika B. Anderson
- The HunterianUniversity of GlasgowGlasgowUK
- Department of Earth and SpaceRoyal Ontario MuseumTorontoOntarioCanada
| | - Suchinta Arif
- Department of BiologyDalhousie UniversityHalifaxNova ScotiaCanada
| | - Rowshyra A. Castañeda
- Ecosystems and Ocean SciencesPacific Region, Fisheries and Oceans CanadaSidneyBritish ColumbiaCanada
| | | | - Rafael Eiji Iwama
- Departamento de Genética e Biologia Evolutiva, Instituto de BiociênciasUniversidade de São PauloSão PauloBrazil
| | - Erica Fellin
- Department of BiologyMcGill UniversityMontrealQuebecCanada
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8
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Thomassen EE, Sigsgaard EE, Jensen MR, Olsen K, Hansen MDD, Svenning JC, Thomsen PF. Contrasting seasonal patterns in diet and dung-associated invertebrates of feral cattle and horses in a rewilding area. Mol Ecol 2023; 32:2071-2091. [PMID: 36744391 DOI: 10.1111/mec.16847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/16/2022] [Accepted: 01/09/2023] [Indexed: 02/07/2023]
Abstract
Trophic rewilding is increasingly applied in restoration efforts, with the aim of reintroducing the ecological functions provided by large-bodied mammals and thereby promote self-regulating, biodiverse ecosystems. However, empirical evidence for the effects of megafauna introductions on the abundance and richness of other organisms such as plants and invertebrates, and the mechanisms involved still need strengthening. In this study, we use environmental DNA (eDNA) metabarcoding of dung from co-existing feral cattle and horses to assess the seasonal variation in plant diet and dung-associated arthropods and nematodes. We found consistently high diet richness of horses, with low seasonal variability, while the generally lower dietary diversity of cattle increased substantially during summer. Intriguingly, season-specific diets differed, with a greater proportion of trees in the horses' diet during winter, where cattle relied more on shrubs. Graminoids were predominantly found in the diet of horses, but were generally underrepresented compared to previous studies, possibly due to the high prevalence of forbs in the study area. Dung-associated arthropod richness was higher for cattle, largely due to a high richness of flies during summer. Several species of dung-associated arthropods were found primarily in dung from one of the two herbivores, and our data confirmed known patterns of seasonal activity. Nematode richness was constantly higher for horses, and nematode communities were markedly different between the two species. Our results demonstrate complementary effects of cattle and horses through diet differences and dung-associated invertebrate communities, enhancing our understanding of large herbivore effects on vegetation and associated biodiversity. These results are directly applicable for decision-making in rewilding projects, suggesting biodiversity-benefits by inclusion of functionally different herbivores.
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Affiliation(s)
| | | | | | - Kent Olsen
- Department of Research and Collections, Natural History Museum Aarhus, Aarhus C, Denmark
| | - Morten D D Hansen
- Department of Research and Collections, Natural History Museum Aarhus, Aarhus C, Denmark
| | - Jens-Christian Svenning
- Department of Biology, Aarhus University, Aarhus C, Denmark.,Center for Ecological Dynamics in a Novel Biosphere (ECONOVO) & Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Aarhus University, Aarhus C, Denmark
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9
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Han W, Tang H, Wei L, Zhang E. The first DNA barcode library of Chironomidae from the Tibetan Plateau with an evaluation of the status of the public databases. Ecol Evol 2023; 13:e9849. [PMID: 36861023 PMCID: PMC9969238 DOI: 10.1002/ece3.9849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/26/2023] [Accepted: 02/02/2023] [Indexed: 03/03/2023] Open
Abstract
The main aim of this study was to curate a COI barcode library of Chironomidae from the Tibetan Plateau (TP) as an essential supplement to the public database. Another aim is to evaluate the current status of the public database of Chironomidae in aspects of taxonomic coverage, geographic representation, barcode quality, and efficiency for molecular identification, the Tibetan Plateau, China. In this study, 512 individuals of Chironomidae from the TP were identified based on morphological taxonomy and barcode analysis. The metadata of public records of Chironomidae were downloaded from the BOLD, and the quality of the public barcodes was ranked using the BAGS program. The reliability of the public library for molecular identification was evaluated with the newly curated library using the BLAST method. The newly curated library comprised 159 barcode species of 54 genera, of which 58.4% of species were likely new to science. There were great gaps in the taxonomic coverage and geographic representation in the public database, and only 29.18% of barcodes were identified at the species level. The quality of the public database was of concern, with only 20% of species being determined as concordant between BINs and morphological species. The accuracy of molecular identification using the public database was poor, and about 50% of matched barcodes could be correctly identified at the species level at the identity threshold of 97%. Based on these data, some recommendations are included here for improving barcoding studies on Chironomidae. The species richness of Chironomidae from the TP is much higher than ever recorded. Barcodes from more taxonomic groups and geographic regions are urgently needed to fill the great gap in the current public database of Chironomidae. Users should take caution when public databases are adopted as reference libraries for the taxonomic assignment.
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Affiliation(s)
- Wu Han
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and LimnologyChinese Academy of ScienceNanjingChina
- University of Chinese Academy of SciencesBeijing100039China
| | - Hongqu Tang
- Life Science and Technology CollegeJinan UniversityGuangzhouChina
| | - Lili Wei
- Life Science and Technology CollegeJinan UniversityGuangzhouChina
| | - Enlou Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and LimnologyChinese Academy of ScienceNanjingChina
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10
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Klimova A, Rodríguez‐Estrella R, Meng G, Gutiérrez‐Rivera JN, Jimenez‐Jimenez ML, Liu S. Metabarcoding reveals seasonal and spatial patterns of arthropod community assemblages in two contrasting habitats: Desert and oasis of the Baja California Peninsula, Mexico. DIVERS DISTRIB 2023. [DOI: 10.1111/ddi.13672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Affiliation(s)
- Anastasia Klimova
- Centro de Investigaciones Biológicas del Noroeste S.C. La Paz Mexico
| | | | - Guanliang Meng
- Zoological Research Museum Alexander Koenig, Leibniz Institute for the Analysis of Biodiversity Change Bonn Germany
| | | | | | - Shanlin Liu
- Department of Entomology, College of Plant Protection China Agricultural University Beijing China
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11
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Kvist S, Earl I, Kink E, Oceguera-Figueroa A, Trontelj P. Phylogenetic relationships and species delimitation in Haemopis (Annelida: Hirudinea: Haemopidae). Mol Phylogenet Evol 2023; 178:107648. [PMID: 36283573 DOI: 10.1016/j.ympev.2022.107648] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 10/07/2022] [Accepted: 10/17/2022] [Indexed: 11/21/2022]
Abstract
The Holarctic leech genus Haemopis currently includes 11 species, all of which are macrophagous, as opposed to their more infamous bloodfeeding counterparts among hirudiniform leeches. In spite of their ecological importance as fish food and predators of freshwater invertebrates, there is a paucity of data regarding morphology and genetic variation that might guide future identification efforts for members of the genus. The lack of detailed descriptions of distinguishing morphological features, coupled with the absence of a robust phylogenetic hypothesis for the genus, have conspired to prevent meaningful inferences on the natural history of the group. In an attempt to remedy this, we present new genetic (using COI, 12S rDNA, 28S rDNA and 18S rDNA) data for the majority of the known species diversity within the genus in order to both infer a phylogenetic hypothesis and to introduce authoritative DNA barcodes for the newly collected species. The potential of these barcodes is increased through rigorous morphological investigations of the specimens, with comparisons to the original literature. Our resulting phylogenetic hypothesis is agnostic as to the geographic origin of the genus, with equal probability afforded to both a Nearctic and Palearctic origin. Beyond this, we show that there is a strong tendency towards a barcoding gap within the genus, but that a distinct gap is lacking due to the relatively high genetic variation found within H. marmorata. Taken together, our results shed light on species delimitation within, and evolutionary history of, this often-neglected group of leeches.
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Affiliation(s)
- Sebastian Kvist
- Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 2C6, Canada; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 2B4, Canada.
| | - Ismay Earl
- Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 2C6, Canada; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 2B4, Canada
| | - Ester Kink
- Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 2C6, Canada
| | - Alejandro Oceguera-Figueroa
- Laboratorio de Helmintología, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Peter Trontelj
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
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12
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Environmental DNA (eDNA): Powerful Technique for Biodiversity Conservation. J Nat Conserv 2022. [DOI: 10.1016/j.jnc.2022.126325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Ottati S, Eberle J, Rulik B, Köhler F, Ahrens D. From DNA barcodes to ecology: Meta-analysis of central European beetles reveal link with species ecology but also to data pattern and gaps. Ecol Evol 2022; 12:e9650. [PMID: 36568864 PMCID: PMC9771709 DOI: 10.1002/ece3.9650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/23/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022] Open
Abstract
DNA barcoding has been used worldwide to identify biological specimens and to delimit species. It represents a cost-effective, fast, and efficient way to assess biodiversity with help of the public Barcode of Life Database (BOLD) accounting for more than 236,000 animal species and more than 10 million barcode sequences. Here, we performed a meta-analysis of available barcode data of central European Coleoptera to detect intraspecific genetic patterns among ecological groups in relation to geographic distance with the aim to investigate a possible link between infraspecific variation and species ecology. We collected information regarding feeding style, body size, as well as habitat and biotope preferences. Mantel tests and two variants of Procrustes analysis, both involving the Principal Coordinates Neighborhood Matrices (PCNM) approach, were applied on genetic and geographic distance matrices. However, significance levels were too low to further use the outcome for further trait investigation: these were in mean for all ecological guilds only 7.5, 9.4, or 15.6% for PCNM + PCA, NMDS + PCA, and Mantel test, respectively, or at best 28% for a single guild. Our study confirmed that certain ecological traits were associated with higher species diversity and foster stronger genetic differentiation. Results suggest that increased numbers of species, sampling localities, and specimens for a chosen area of interest may give new insights to explore barcode data and species ecology for the scope of conservation on a larger scale. We performed a meta-analysis of available barcode data of central European beetles to detect intraspecific genetic patterns among ecological groups in relation to geographic distance, regarding feeding style, body size, as well as habitat and biotope preferences. Our study confirmed that certain ecological traits were associated with higher species diversity and foster stronger genetic differentiation. However, significance levels were too low to further use the outcome for further trait investigation.
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Affiliation(s)
- Sara Ottati
- Zoologisches Forschungsmuseum A. Koenig (LIB)BonnGermany
- Department of Agricultural, Forest and Food Sciences (DISAFA)University of TorinoTurinItaly
| | - Jonas Eberle
- Zoologisches Forschungsmuseum A. Koenig (LIB)BonnGermany
- Department of Environment & BiodiversityUniversity of SalzburgSalzburgAustria
| | - Björn Rulik
- Department of Agricultural, Forest and Food Sciences (DISAFA)University of TorinoTurinItaly
| | - Frank Köhler
- Coleopterological Research OfficeBornheimGermany
| | - Dirk Ahrens
- Zoologisches Forschungsmuseum A. Koenig (LIB)BonnGermany
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14
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Willassen E, Westgaard JI, Kongsrud JA, Hanebrekke T, Buhl-Mortensen P, Holte B. Benthic invertebrates in Svalbard fjords-when metabarcoding does not outperform traditional biodiversity assessment. PeerJ 2022; 10:e14321. [PMID: 36415859 PMCID: PMC9676020 DOI: 10.7717/peerj.14321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/10/2022] [Indexed: 11/18/2022] Open
Abstract
To protect and restore ecosystems and biodiversity is one of the 10 challenges identified by the United Nations's Decade of the Ocean Science. In this study we used eDNA from sediments collected in two fjords of the Svalbard archipelago and compared the taxonomic composition with traditional methods through metabarcoding, targeting mitochondrial CO1, to survey benthos. Clustering of 21.6 mill sequence reads with a d value of 13 in swarm, returned about 25 K OTU reads. An identification search with the BOLD database returned 12,000 taxonomy annotated sequences spanning a similarity range of 50% to 100%. Using an acceptance filter of minimum 90% similarity to the CO1 reference sequence, we found that 74% of the ca 100 taxon identified sequence reads were Polychaeta and 22% Nematoda. Relatively few other benthic invertebrate species were detected. Many of the identified sequence reads were extra-organismal DNA from terrestrial, planktonic, and photic zone sources. For the species rich Polychaeta, we found that, on average, only 20.6% of the species identified from morphology were also detected with DNA. This discrepancy was not due to missing reference sequences in the search database, because 90-100% (mean 96.7%) of the visually identified species at each station were represented with barcodes in Boldsystems. The volume of DNA samples is small compared with the volume searched in visual sorting, and the replicate DNA-samples in sum covered only about 2% of the surface area of a grab. This may considerably reduce the detection rate of species that are not uniformly distributed in the sediments. Along with PCR amplification bias and primer mismatch, this may be an important reason for the limited congruence of species identified with the two approaches. However, metabarcoding also identified 69 additional species that are usually overlooked in visual sample sorting, demonstrating how metabarcoding can complement traditional methodology by detecting additional, less conspicuous groups of organisms.
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Affiliation(s)
- Endre Willassen
- Department of Natural History, University of Bergen, Bergen, Norway
| | - Jon-Ivar Westgaard
- Department of Population Genetics, Institute of Marine Research, Tromsø, Troms, Norway
| | | | - Tanja Hanebrekke
- Department of Population Genetics, Institute of Marine Research, Tromsø, Troms, Norway
| | - Pål Buhl-Mortensen
- Department of Bentic Communities, Institute of Marine Research, Bergen, Norway
| | - Børge Holte
- Department of Bentic Communities, Institute of Marine Research, Tromsø, Troms, Norway
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15
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Diversity of soil faunal community as influenced by crop straw combined with different synthetic fertilizers in upland purple soil. Sci Rep 2022; 12:19306. [PMID: 36369353 PMCID: PMC9652334 DOI: 10.1038/s41598-022-23883-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022] Open
Abstract
Soil fauna play a crucial role in sustaining agro-ecosystem functions. Crop straw is recommended for application to agricultural fields to improve soil quality. However, the effects of crop straw combined with different synthetic fertilizers on the soil faunal community remain unclear, and knowledge regarding purple soil is limited. Using the conserved cytochrome c oxidase I (COI) gene as markers, we examined the responses of the soil faunal community to different fertilization in upland purple soil of southwestern China. The accuracy of the morphological and molecular methods in characterizing soil nematodes was compared. Our results showed that different fertilization treatments significantly changed the soil faunal community structure (Adonis test, R2 = 0.43, P = 0.011). Sixteen biomarkers were identified according to LEfSe (linear discriminant analysis effect size). The diversity and species number of soil fauna were closely related to soil organic matter (SOM) and total phosphorus (TP) (P < 0.05). This study indicates that crop straw return can improve the soil fertility and diversity of soil fauna in purple soil. Additionally, the morphological approach and molecular method based on the COI gene can be considered as complementary approaches in characterizing soil nematode community.
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16
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Brun L, Schneider J, Carrió EM, Dongre P, Taberlet P, Waal VD, Fumagalli L. Focal vs. fecal: Seasonal variation in the diet of wild vervet monkeys from observational and
DNA
metabarcoding data. Ecol Evol 2022; 12:e9358. [PMID: 36203642 PMCID: PMC9526031 DOI: 10.1002/ece3.9358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 08/12/2022] [Accepted: 09/05/2022] [Indexed: 11/08/2022] Open
Affiliation(s)
- Loïc Brun
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
| | - Judith Schneider
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
| | - Eduard Mas Carrió
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
| | - Pooja Dongre
- Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
- Inkawu Vervet Project Mawana Game Reserve, Swart Mfolozi KwaZulu Natal South Africa
| | - Pierre Taberlet
- Laboratoire d'Ecologie Alpine Université Grenoble Alpes, CNRS Grenoble France
- UiT – The Arctic University of Norway, Tromsø Museum Tromsø Norway
| | - van de Waal
- Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
- Inkawu Vervet Project Mawana Game Reserve, Swart Mfolozi KwaZulu Natal South Africa
| | - Luca Fumagalli
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore University of Lausanne Lausanne Switzerland
- Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne‐Geneva, Lausanne University Hospital and University of Lausanne Lausanne Switzerland
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17
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Hintikka S, Carlsson JE, Carlsson J. The bacterial hitchhiker’s guide to COI: Universal primer-based COI capture probes fail to exclude bacterial DNA, but 16S capture leaves metazoa behind. METABARCODING AND METAGENOMICS 2022. [DOI: 10.3897/mbmg.6.80416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Environmental DNA (eDNA) metabarcoding from water samples has, in recent years, shown great promise for biodiversity monitoring. However, universal primers targeting the cytochrome oxidase I (COI) marker gene popular in metazoan studies have displayed high levels of nontarget amplification. To date, enrichment methods bypassing amplification have not been able to match the detection levels of conventional metabarcoding. This study evaluated the use of universal metabarcoding primers as capture probes to either isolate target DNA or to remove nontarget DNA, prior to amplification, by using biotinylated versions of universal metazoan and bacterial barcoding primers, namely metazoan COI (mlCOIintF) and bacterial 16S (515F). Additionally, each step of the protocol was assessed by amplifying for both metazoan COI (mlCOIintF/jgHCO2198) and bacterial 16S (515F/806R) to investigate the effect on the metazoan and bacterial communities. Bacterial read abundance increased significantly in response to the captures (COI library), while the quality of the captured DNA was also improved. The metazoan-oriented probe captured bacterial DNA in a range that was also amplifiable with the 16S primers, demonstrating the ability of capture probes to isolate fragments of DNA spanning over a longer distance than perhaps expected, from eDNA. Although the use of the tested COI probe cannot be recommended for metazoan enrichment, based on the experimental results, the concept of capturing these longer fragments could be applied to metazoan metabarcoding. By using a truly conserved site without a high-level taxonomic resolution as a target for capture, it may be possible to isolate DNA fragments large enough to span over a nearby barcoding region (e.g., COI), which can then be processed through a conventional metabarcoding-by-amplification protocol.
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18
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Govender A, Singh S, Groeneveld J, Pillay S, Willows-Munro S. Experimental validation of taxon-specific mini-barcode primers for metabarcoding of zooplankton. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2022; 32:e02469. [PMID: 34626511 DOI: 10.1002/eap.2469] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 04/23/2021] [Accepted: 05/20/2021] [Indexed: 06/13/2023]
Abstract
Metabarcoding to determine the species composition and diversity of marine zooplankton communities is a fast-developing field in which the standardization of methods is yet to be fully achieved. The selection of genetic markers and primer choice are particularly important because they substantially influence species detection rates and accuracy. Validation is therefore an important step in the design of metabarcoding protocols. We developed taxon-specific mini-barcode primers for the cytochrome c oxidase subunit I (COI) gene region and used an experimental approach to test species detection rates and primer accuracy of the newly designed primers for prawns, shrimps and crabs and published primers for marine lobsters and fish. Artificially assembled mock communities (with known species ratios) and unsorted coastal tow-net zooplankton samples were sequenced and the detected species were compared with those seeded in mock communities to test detection rates. Taxon-specific primers increased detection rates of target taxa compared with a universal primer set. Primer cocktails (multiple primer sets) significantly increased species detection rates compared with single primer pairs and could detect up to 100% of underrepresented target taxa in mock communities. Taxon-specific primers recovered fewer false-positive or false-negative results than the universal primer. The methods used to design taxon-specific mini-barcodes and the experimental mock community validation protocols shown here can easily be applied to studies on other groups and will allow for a level of standardization among studies undertaken in different ecosystems or geographic locations.
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Affiliation(s)
- Ashrenee Govender
- School of Life Sciences, University of KwaZulu-Natal, Carbis Road, Pietermaritzburg, KwaZulu-Natal, 3201, South Africa
- Oceanographic Research Institute, King Shaka Avenue, Point, Durban, KwaZulu-Natal, 4001, South Africa
| | - Sohana Singh
- Oceanographic Research Institute, King Shaka Avenue, Point, Durban, KwaZulu-Natal, 4001, South Africa
| | - Johan Groeneveld
- School of Life Sciences, University of KwaZulu-Natal, Carbis Road, Pietermaritzburg, KwaZulu-Natal, 3201, South Africa
- Oceanographic Research Institute, King Shaka Avenue, Point, Durban, KwaZulu-Natal, 4001, South Africa
| | - Sureshnee Pillay
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), Department of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Umbilo Rd, Durban, KwaZulu-Natal, 4001, South Africa
| | - Sandi Willows-Munro
- School of Life Sciences, University of KwaZulu-Natal, Carbis Road, Pietermaritzburg, KwaZulu-Natal, 3201, South Africa
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19
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Miller‐ter Kuile A, Apigo A, Young HS. Effects of consumer surface sterilization on diet DNA metabarcoding data of terrestrial invertebrates in natural environments and feeding trials. Ecol Evol 2021; 11:12025-12034. [PMID: 34522358 PMCID: PMC8427582 DOI: 10.1002/ece3.7968] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 01/04/2023] Open
Abstract
DNA metabarcoding is an emerging tool used to quantify diet in environments and consumer groups where traditional approaches are unviable, including small-bodied invertebrate taxa. However, metabarcoding of small taxa often requires DNA extraction from full body parts (without dissection), and it is unclear whether surface contamination from body parts alters presumed diet presence or diversity.We examined four different measures of diet (presence, rarefied read abundance, richness, and species composition) for a terrestrial invertebrate consumer (the spider Heteropoda venatoria) both collected in its natural environment and fed an offered diet item in contained feeding trials using DNA metabarcoding of full body parts (opisthosomas). We compared diet from consumer individuals surface sterilized to remove contaminants in 10% commercial bleach solution followed by deionized water with a set of unsterilized individuals.We found that surface sterilization did not significantly alter any measure of diet for consumers in either a natural environment or feeding trials. The best-fitting model predicting diet detection in feeding trial consumers included surface sterilization, but this term was not statistically significant (β = -2.3, p-value = .07).Our results suggest that surface contamination does not seem to be a significant concern in this DNA diet metabarcoding study for consumers in either a natural terrestrial environment or feeding trials. As the field of diet DNA metabarcoding continues to progress into new environmental contexts with various molecular approaches, we suggest ongoing context-specific consideration of the possibility of surface contamination.
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Affiliation(s)
- Ana Miller‐ter Kuile
- Department of Ecology, Evolution, and Marine BiologyUniversity of California Santa BarbaraSanta BarbaraCAUSA
| | - Austen Apigo
- Department of Ecology, Evolution, and Marine BiologyUniversity of California Santa BarbaraSanta BarbaraCAUSA
| | - Hillary S. Young
- Department of Ecology, Evolution, and Marine BiologyUniversity of California Santa BarbaraSanta BarbaraCAUSA
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20
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Esquerré D, Donnellan SC, Pavón-Vázquez CJ, Fenker J, Keogh JS. Phylogeography, historical demography and systematics of the world's smallest pythons (Pythonidae, Antaresia). Mol Phylogenet Evol 2021; 161:107181. [PMID: 33892100 DOI: 10.1016/j.ympev.2021.107181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 04/06/2021] [Accepted: 04/15/2021] [Indexed: 11/18/2022]
Abstract
Advances from empirical studies in phylogeography, systematics and species delimitation highlight the importance of integrative approaches for quantifying taxonomic diversity. Genomic data have greatly improved our ability to discern both systematic diversity and evolutionary history. Here we combine analyses of mitochondrial DNA sequences, thousands of genome-wide SNPs and linear and geometric morphometrics on Antaresia, a clade of four currently recognised dwarf pythons from Australia and New Guinea (Antaresia childreni, A. stimsoni, A. maculosa and A. perthensis). Our integrative analyses of phylogenetics, population structure, species delimitation, historical demography and morphometrics revealed that the true evolutionary diversity is not well reflected in the current appraisal of the diversity of the group. We find that Antaresia childreni and A. stimsoni comprise a widespread network of populations connected by gene flow and without evidence of species-level divergence among them. However, A. maculosa shows considerable genetic structuring which leads us to recognise two subspecies in northeastern Australia and a new species in Torres Strait and New Guinea. These two contrasting cases of over and under estimation of diversity, respectively, illustrate the power of thorough integrative approaches into understanding evolution of biodiversity. Furthermore, our analyses of historical demographic patterns highlight the importance of the Kimberley, Pilbara and Cape York as origins of biodiversity in Australia.
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Affiliation(s)
- Damien Esquerré
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia.
| | | | - Carlos J Pavón-Vázquez
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia
| | - Jéssica Fenker
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia
| | - J Scott Keogh
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia
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21
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Bernaola L, Darlington M, Britt K, Prade P, Roth M, Pekarcik A, Boone M, Ricke D, Tran A, King J, Carruthers K, Thompson M, Ternest JJ, Anderson SE, Gula SW, Hauri KC, Pecenka JR, Grover S, Puri H, Vakil SG. Technological Advances to Address Current Issues in Entomology: 2020 Student Debates. JOURNAL OF INSECT SCIENCE (ONLINE) 2021; 21:18. [PMID: 33908604 PMCID: PMC8080135 DOI: 10.1093/jisesa/ieab025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Indexed: 06/12/2023]
Abstract
The 2020 Student Debates of the Entomological Society of America (ESA) were live-streamed during the Virtual Annual Meeting to debate current, prominent entomological issues of interest to members. The Student Debates Subcommittee of the National ESA Student Affairs Committee coordinated the student efforts throughout the year and hosted the live event. This year, four unbiased introductory speakers provided background for each debate topic while four multi-university teams were each assigned a debate topic under the theme 'Technological Advances to Address Current Issues in Entomology'. The two debate topics selected were as follows: 1) What is the best taxonomic approach to identify and classify insects? and 2) What is the best current technology to address the locust swarms worldwide? Unbiased introduction speakers and debate teams began preparing approximately six months before the live event. During the live event, teams shared their critical thinking and practiced communication skills by defending their positions on either taxonomical identification and classification of insects or managing the damaging outbreaks of locusts in crops.
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Affiliation(s)
- Lina Bernaola
- Department of Entomology, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Molly Darlington
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Kadie Britt
- Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Patricia Prade
- Department of Entomology and Nematology, University of Florida, Fort Pierce, FL 34945, USA
| | - Morgan Roth
- Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Adrian Pekarcik
- Department of Entomology, The Ohio State University, Wooster, OH 44691, USA
| | - Michelle Boone
- Department of Entomology, University of Minnesota, St. Paul, MN 55108, USA
| | - Dylan Ricke
- Department of Entomology, The Ohio State University, Wooster, OH 44691, USA
| | - Anh Tran
- Department of Entomology, University of Minnesota, St. Paul, MN 55108, USA
| | - Joanie King
- Department of Entomology, Texas A&M University, College Station, TX 77843, USA
| | - Kelly Carruthers
- Department of Entomology and Nematology, University of Florida, Gainesville, FL 32608, USA
| | - Morgan Thompson
- Department of Entomology, Texas A&M University, College Station, TX 77843, USA
| | - John J Ternest
- Department of Entomology and Nematology, University of Florida, Gainesville, FL 32608, USA
| | - Sarah E Anderson
- Department of Entomology and Nematology, University of Florida, Gainesville, FL 32608, USA
| | - Scott W Gula
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Kayleigh C Hauri
- Department of Entomology, Michigan State University, East Lansing, MI 48824, USA
| | - Jacob R Pecenka
- Department of Entomology, Purdue University, West Lafayette, IN 47907, USA
| | - Sajjan Grover
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Heena Puri
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Surabhi Gupta Vakil
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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22
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Firneno TJ, Itgen MW, Jacobs JL, Mcdaniels CX, Luque-Montes IR, Wilson LD, Townsend JH. Integrating phylogenetics, morphology, and osteology to delimit a new species of endemic montane sheep frog (Microhylidae: Hypopachus) from the Lenca Highlands of Honduras. SYST BIODIVERS 2020. [DOI: 10.1080/14772000.2020.1841325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Thomas J. Firneno
- Department of Biology, University of Texas at Arlington, Arlington, Texas 76019, USA
- Amphibian and Reptile Diversity Research Center, Department of Biology, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Michael W. Itgen
- Department of Biology, Colorado State University, 1878 Campus Delivery, Fort Collins, CO 80523, USA
| | - Justin L. Jacobs
- Department of Biology, University of Texas at Arlington, Arlington, Texas 76019, USA
- Amphibian and Reptile Diversity Research Center, Department of Biology, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Chris X. Mcdaniels
- Department of Biology, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Ileana R. Luque-Montes
- Department of Biology, Indiana University of Pennsylvania, Indiana, PA 15705–1081, USA
- Centro Zamorano de Biodiversidad, Departamento de Ambiente y Desarrollo, Escuela Agrícola Panamericana Zamorano, Municipalidad de San Antonio de Oriente, Francisco Morazán, Honduras
| | - Larry David Wilson
- Centro Zamorano de Biodiversidad, Departamento de Ambiente y Desarrollo, Escuela Agrícola Panamericana Zamorano, Municipalidad de San Antonio de Oriente, Francisco Morazán, Honduras
- 1350 Pelican Court, Homestead, FL 33035-1031, USA
| | - Josiah H. Townsend
- Department of Biology, Indiana University of Pennsylvania, Indiana, PA 15705–1081, USA
- Centro Zamorano de Biodiversidad, Departamento de Ambiente y Desarrollo, Escuela Agrícola Panamericana Zamorano, Municipalidad de San Antonio de Oriente, Francisco Morazán, Honduras
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23
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Candia-Ramírez DT, Francke OF. Another stripe on the tiger makes no difference? Unexpected diversity in the widespread tiger tarantula Davus pentaloris (Araneae: Theraphosidae: Theraphosinae). Zool J Linn Soc 2020. [DOI: 10.1093/zoolinnean/zlaa107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract
Integrative taxonomy is relevant for the discovery and delimitation of cryptic species by incorporating different sources of evidence to construct rigorous species hypotheses. The genus Davus was recently revised and it was found that Davus pentaloris presents high morphological variation across its widespread distribution. However, tarantulas usually present low dispersal capabilities that occasionally result in local endemism. In order to evaluate species boundaries within this taxon, we examine the morphological variation and, additionally, employ four strategies based on mtDNA data (COI): two distance-based [automatic barcode gap discovery (ABGD) and Neighbor-Joining (NJ)] and two tree-based methods [general mixed Yule coalescent (GMYC) and Bayesian Poisson tree process (bPTP)]. Available morphological evidence recovers 13 putative morphospecies, but the different methods based on molecular data recover a variable number of candidate species (16–18). Based on the congruence across all analyses and the available morphological data, we recognize 13 clearly diagnosable species, 12 of them new to science. We conclude that the underestimation of the diversity in D. pentaloris was mainly caused by deficient practices in taxonomy, rather than by the presence of cryptic diversity. Although COI is a functional barcoding marker and it gives reliable results in our study, we recommend combining multiple sources of evidence and strategies to construct better species delimitation hypotheses.
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Affiliation(s)
- Daniela T Candia-Ramírez
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Avenida Universidad 3000, 04510 Coyoacán, Mexico City, Mexico
- Colección Nacional de Arácnidos, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
| | - Oscar F Francke
- Colección Nacional de Arácnidos, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
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24
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Salvi D, Berrilli E, D'Alessandro P, Biondi M. Sharpening the DNA barcoding tool through a posteriori taxonomic validation: The case of Longitarsus flea beetles (Coleoptera: Chrysomelidae). PLoS One 2020; 15:e0233573. [PMID: 32437469 PMCID: PMC7241800 DOI: 10.1371/journal.pone.0233573] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/07/2020] [Indexed: 11/30/2022] Open
Abstract
The accuracy of the DNA barcoding tool depends on the existence of a comprehensive archived library of sequences reliably determined at species level by expert taxonomists. However, misidentifications are not infrequent, especially following large-scale DNA barcoding campaigns on diverse and taxonomically complex groups. In this study we used the species-rich flea beetle genus Longitarsus, that requires a high level of expertise for morphological species identification, as a case study to assess the accuracy of the DNA barcoding tool following several optimization procedures. We built a cox1 reference database of 1502 sequences representing 78 Longitarsus species, among which 117 sequences (32 species) were newly generated using a non-invasive DNA extraction method that allows keeping reference voucher specimens. Within this dataset we identified 69 taxonomic inconsistencies using barcoding gap analysis and tree topology methods. Threshold optimisation and a posteriori taxonomic revision based on newly generated reference sequences and metadata allowed resolving 44 sequences with ambiguous and incorrect identification and provided a significant improvement of the DNA barcoding accuracy and identification efficacy. Unresolved taxonomic uncertainties, due to overlapping intra- and inter-specific levels of divergences, mainly regards the Longitarsus pratensis species complex and polyphyletic groups L. melanocephalus, L. nigrofasciatus and L. erro. Such type of errors indicates either poorly established taxonomy or any biological processes that make mtDNA groups poorly predictive of species boundaries (e.g. recent speciation or interspecific hybridisation), thus providing directions for further integrative taxonomic and evolutionary studies. Overall, this study underlines the importance of reference vouchers and high-quality metadata associated to sequences in reference databases and corroborates, once again, the key role of taxonomists in any step of the DNA barcoding pipeline in order to generate and maintain a correct and functional reference library.
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Affiliation(s)
- Daniele Salvi
- Department of Health, Life and Environmental Sciences, University of L'Aquila, Coppito, L'Aquila, Italy
- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Vairão, Portugal
| | - Emanuele Berrilli
- Department of Health, Life and Environmental Sciences, University of L'Aquila, Coppito, L'Aquila, Italy
| | - Paola D'Alessandro
- Department of Health, Life and Environmental Sciences, University of L'Aquila, Coppito, L'Aquila, Italy
| | - Maurizio Biondi
- Department of Health, Life and Environmental Sciences, University of L'Aquila, Coppito, L'Aquila, Italy
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Chaplin K, Sumner J, Hipsley CA, Melville J. An Integrative Approach Using Phylogenomics and High-Resolution X-Ray Computed Tomography for Species Delimitation in Cryptic Taxa. Syst Biol 2020; 69:294-307. [PMID: 31372642 DOI: 10.1093/sysbio/syz048] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/18/2019] [Accepted: 07/12/2019] [Indexed: 11/14/2022] Open
Abstract
Morphologically cryptic taxa have proved to be a long-standing challenge for taxonomists. Lineages that show strong genomic structuring across the landscape but are phenotypically similar pose a conundrum, with traditional morphological analyses of these cryptic lineages struggling to keep up with species delimitation advances. Micro X-ray computed tomography (CT) combined with geometric morphometric analyses provides a promising avenue for identification of morphologically cryptic taxa, given its ability to detect subtle differences in anatomical structures. However, this approach has yet to be used in combination with genomic data in a comparative analytical framework to distinguish cryptic taxa. We present an integrative approach incorporating genomic and geometric morphometric evidence to assess the species delimitation of grassland earless dragons (Tympanocryptis spp.) in north-eastern Australia. Using mitochondrial and nuclear genes (ND2 and RAG1, respectively), along with $>$8500 SNPs (nuclear single nucleotide polymorphisms), we assess the evolutionary independence of target lineages and several closely related species. We then integrate phylogenomic data with osteological cranial variation between lineages using landmark-based analyses of three-dimensional CT models. High levels of genomic differentiation between the three target lineages were uncovered, also supported by significant osteological differences. By incorporating multiple lines of evidence, we provide strong support for three undescribed cryptic lineages of Tympanocryptis in north-eastern Australia that warrant taxonomic review. Our approach demonstrates the successful application of CT with integrative taxonomic approaches for cryptic species delimitation, which is broadly applicable across vertebrates containing morphologically similar yet genetically distinct lineages. Additionally, we provide a review of recent integrative taxonomic approaches for cryptic species delimitation and an assessment of how our approach can value-add to taxonomic research.
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Affiliation(s)
- Kirilee Chaplin
- Department of Sciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia.,School of BioSciences The University of Melbourne Parkville Campus Victoria 3010, Australia
| | - Joanna Sumner
- Department of Sciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia
| | - Christy A Hipsley
- Department of Sciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia.,School of BioSciences The University of Melbourne Parkville Campus Victoria 3010, Australia
| | - Jane Melville
- Department of Sciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia
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26
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Berrilli E, Simbula G. First molecular identification of the tapeworm Mesocestoides litteratus from an Italian wall lizard (Podarcis siculus). INFECTION GENETICS AND EVOLUTION 2020; 81:104233. [PMID: 32028056 DOI: 10.1016/j.meegid.2020.104233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/28/2020] [Accepted: 02/01/2020] [Indexed: 12/20/2022]
Abstract
The cyclophyllidean cestodes of the genus Mesocestoides are parasites infecting a variety of carnivorous vertebrates. The complete life cycle of these tapeworms is not clear yet, but some reptiles, amphibians, birds and micro-mammals have been indicated as intermediate hosts. Although Mesocestoides spp. are considered endemic in Europe, infections by the metacestode form, the tetrathyridium, are reported less commonly than are infections by adult worms. In the present study, a peritoneal infection by Mesocestoides tetrathyridia in a wall lizard (Podarcis siculus) collected in central Italy is described. The phylogenetic position of the metacestodes was assessed using the barcode region COI and species delimitation methods, i.e. Automatic Barcode Gap Discovery (ABGD) and Bayesian implementation of the Poisson Tree Processes model (bPTP). COI sequence analysis assigned the isolates from the wall lizard to Mesocestoides litteratus, as confirmed by species delimitation and phylogenetic analyses. M. litteratus has been observed in Europe mainly in the definitive hosts (dogs, cats and foxes), and never identified in the Mediterranean region. This study represents the first evidence of parasitic infection by tetrathyridia of M. litteratus in P. siculus in Italy.
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Affiliation(s)
- Emanuele Berrilli
- Dipartimento di Medicina Clinica, Sanità pubblica, Scienze della Vita e dell'Ambiente, Università degli Studi dell'Aquila, Via Vetoio, 40, 67100 Coppito, L'Aquila, Italy.
| | - Giulia Simbula
- Dipartimento di Scienze, Università di Roma Tre, Viale Guglielmo Marconi 446, 00146 Rome, Italy.
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Trebitz A, Sykes M, Barge J. A reference inventory for aquatic fauna of the Laurentian Great Lakes. JOURNAL OF GREAT LAKES RESEARCH 2019; 45:1036-1046. [PMID: 34326568 PMCID: PMC8318194 DOI: 10.1016/j.jglr.2019.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The Laurentian Great Lakes encompass an expansive and diverse set of freshwater ecosystems that contain a concordantly large and diverse vertebrate and invertebrate fauna. Although numerous publications exist concerning the composition and distribution of this fauna, there is at present no single readily available resource that brings all this information together. Here, we present and describe the compilation process for a comprehensive Great Lakes aquatic fauna inventory covering fishes, reptiles, amphibians, zooplankton, mollusks, annelids, insects, mites, and various other aquatic invertebrates. Inventory entries were developed via an extensive search of literature and internet sources and are attributed with detailed nomenclature information, general lake and habitat occurrences, and supporting citations and links to life history and genetic marker information. The inventory scope is the Laurentian Great Lakes proper and their connecting rivers, and their fringing coastal wetlands and lower tributaries. Over 2200 unique taxa are contained in the inventory -- 85% resolved to species and 14% to genus. The listing substantially expands previous richness estimates for invertebrates in the Great Lakes, but taxonomic resolution and spatial distribution information for them remains quite uneven. Example pattern analyses for fauna in this inventory show that aquatic vertebrates are generally more widely distributed than invertebrates, and that biodiversity is concentrated in the coastal margins. The inventory is being packaged into a public, searchable database that showcases the biodiversity of the Great Lakes aquatic fauna and can assist the research and management community in their biological investigations.
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Affiliation(s)
- Anett Trebitz
- U.S. Environmental Protection Agency, Office of Research and Development, Mid-Continent 8 Ecology Division, 6201 Congdon Blvd., Duluth MN 55804, USA
| | - Maicie Sykes
- Position at U.S. EPA through Badger Technical Services
- Current affiliation: Colorado Parks and Wildlife, Foothills Wildlife Research Facility, Fort Collins, CO, USA
- U.S. Environmental Protection Agency, Office of Research and Development, Mid-Continent 8 Ecology Division, 6201 Congdon Blvd., Duluth MN 55804, USA
| | - Jonathan Barge
- Position at U.S. EPA through Oak Ridge Institute for Science and Education
- U.S. Environmental Protection Agency, Office of Research and Development, Mid-Continent 8 Ecology Division, 6201 Congdon Blvd., Duluth MN 55804, USA
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28
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Beentjes KK, Speksnijder AGCL, Schilthuizen M, Hoogeveen M, Pastoor R, van der Hoorn BB. Increased performance of DNA metabarcoding of macroinvertebrates by taxonomic sorting. PLoS One 2019; 14:e0226527. [PMID: 31841568 PMCID: PMC6913968 DOI: 10.1371/journal.pone.0226527] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 11/29/2019] [Indexed: 11/23/2022] Open
Abstract
DNA-based identification through the use of metabarcoding has been proposed as the next step in the monitoring of biological communities, such as those assessed under the Water Framework Directive (WFD). Advances have been made in the field of metabarcoding, but challenges remain when using complex samples. Uneven biomass distributions, preferential amplification and reference database deficiencies can all lead to discrepancies between morphological and DNA-based taxa lists. The effects of different taxonomic groups on these issues remain understudied. By metabarcoding WFD monitoring samples, we analyzed six different taxonomic groups of freshwater organisms, both separately and combined. Identifications based on metabarcoding data were compared directly to morphological assessments performed under the WFD. The diversity of taxa for both morphological and DNA-based assessments was similar, although large differences were observed in some samples. The overlap between the two taxon lists was 56.8% on average across all taxa, and was highest for Crustacea, Heteroptera, and Coleoptera, and lowest for Annelida and Mollusca. Taxonomic sorting in six basic groups before DNA extraction and amplification improved taxon recovery by 46.5%. The impact on ecological quality ratio (EQR) scoring was considerable when replacing morphology with DNA-based identifications, but there was a high correlation when only replacing a single taxonomic group with molecular data. Different taxonomic groups provide their own challenges and benefits. Some groups might benefit from a more consistent and robust method of identification. Others present difficulties in molecular processing, due to uneven biomass distributions, large genetic diversity or shortcomings of the reference database. Sorting samples into basic taxonomic groups that require little taxonomic knowledge greatly improves the recovery of taxa with metabarcoding. Current standards for EQR monitoring may not be easily replaced completely with molecular strategies, but the effectiveness of molecular methods opens up the way for a paradigm shift in biomonitoring.
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Affiliation(s)
- Kevin K. Beentjes
- Naturalis Biodiversity Center, Leiden, the Netherlands
- Institute of Biology Leiden, Leiden University, Leiden, the Netherlands
- * E-mail:
| | | | - Menno Schilthuizen
- Naturalis Biodiversity Center, Leiden, the Netherlands
- Institute of Biology Leiden, Leiden University, Leiden, the Netherlands
| | | | - Rob Pastoor
- Naturalis Biodiversity Center, Leiden, the Netherlands
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29
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deWaard JR, Ratnasingham S, Zakharov EV, Borisenko AV, Steinke D, Telfer AC, Perez KHJ, Sones JE, Young MR, Levesque-Beaudin V, Sobel CN, Abrahamyan A, Bessonov K, Blagoev G, deWaard SL, Ho C, Ivanova NV, Layton KKS, Lu L, Manjunath R, McKeown JTA, Milton MA, Miskie R, Monkhouse N, Naik S, Nikolova N, Pentinsaari M, Prosser SWJ, Radulovici AE, Steinke C, Warne CP, Hebert PDN. A reference library for Canadian invertebrates with 1.5 million barcodes, voucher specimens, and DNA samples. Sci Data 2019; 6:308. [PMID: 31811161 PMCID: PMC6897906 DOI: 10.1038/s41597-019-0320-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 11/11/2019] [Indexed: 01/08/2023] Open
Abstract
The reliable taxonomic identification of organisms through DNA sequence data requires a well parameterized library of curated reference sequences. However, it is estimated that just 15% of described animal species are represented in public sequence repositories. To begin to address this deficiency, we provide DNA barcodes for 1,500,003 animal specimens collected from 23 terrestrial and aquatic ecozones at sites across Canada, a nation that comprises 7% of the planet's land surface. In total, 14 phyla, 43 classes, 163 orders, 1123 families, 6186 genera, and 64,264 Barcode Index Numbers (BINs; a proxy for species) are represented. Species-level taxonomy was available for 38% of the specimens, but higher proportions were assigned to a genus (69.5%) and a family (99.9%). Voucher specimens and DNA extracts are archived at the Centre for Biodiversity Genomics where they are available for further research. The corresponding sequence and taxonomic data can be accessed through the Barcode of Life Data System, GenBank, the Global Biodiversity Information Facility, and the Global Genome Biodiversity Network Data Portal.
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Affiliation(s)
- Jeremy R deWaard
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | | | - Evgeny V Zakharov
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Alex V Borisenko
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Dirk Steinke
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Angela C Telfer
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Kate H J Perez
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Jayme E Sones
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Monica R Young
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | | | - Crystal N Sobel
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Arusyak Abrahamyan
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Kyrylo Bessonov
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
- Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Gergin Blagoev
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Stephanie L deWaard
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Chris Ho
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Natalia V Ivanova
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Kara K S Layton
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
- Ocean Frontier Institute, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Liuqiong Lu
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Ramya Manjunath
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Jaclyn T A McKeown
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Megan A Milton
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Renee Miskie
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Norm Monkhouse
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Suresh Naik
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Nadya Nikolova
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Mikko Pentinsaari
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Sean W J Prosser
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | | | - Claudia Steinke
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Connor P Warne
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - Paul D N Hebert
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada.
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Scheifler M, Ruiz-Rodríguez M, Sanchez-Brosseau S, Magnanou E, Suzuki MT, West N, Duperron S, Desdevises Y. Characterization of ecto- and endoparasite communities of wild Mediterranean teleosts by a metabarcoding approach. PLoS One 2019; 14:e0221475. [PMID: 31504055 PMCID: PMC6736230 DOI: 10.1371/journal.pone.0221475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 08/07/2019] [Indexed: 02/01/2023] Open
Abstract
Next-generation sequencing methods are increasingly used to identify eukaryotic, unicellular and multicellular symbiont communities within hosts. In this study, we analyzed the non-specific reads obtained during a metabarcoding survey of the bacterial communities associated to three different tissues collected from 13 wild Mediterranean teleost fish species. In total, 30 eukaryotic genera were identified as putative parasites of teleosts, associated to skin mucus, gills mucus and intestine: 2 ascomycetes, 4 arthropods, 2 cnidarians, 7 nematodes, 10 platyhelminthes, 4 apicomplexans, 1 ciliate as well as one order in dinoflagellates (Syndiniales). These results highlighted that (1) the metabarcoding approach was able to uncover a large spectrum of symbiotic organisms associated to the fish species studied, (2) symbionts not yet identified in several teleost species were putatively present, (3) the parasitic diversity differed markedly across host species and (4) in most cases, the distribution of known parasitic genera within tissues is in accordance with the literature. The current work illustrates the large insights that can be gained by making maximum use of data from a metabarcoding approach.
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Affiliation(s)
- Mathilde Scheifler
- Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France
| | - Magdalena Ruiz-Rodríguez
- Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France
| | - Sophie Sanchez-Brosseau
- Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France
| | - Elodie Magnanou
- Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France
| | - Marcelino T. Suzuki
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes, LBBM Observatoire Océanologique, Banyuls/Mer, France
| | - Nyree West
- Sorbonne Université, CNRS, Observatoire Océanologique de Banyuls, Banyuls/Mer, France
| | - Sébastien Duperron
- CNRS, Muséum National d’Histoire Naturelle, Molécules de Communication et Adaptation des Micro-organismes, UMR7245 MCAM, Muséum National d’Histoire Naturelle, Paris, France
| | - Yves Desdevises
- Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France
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31
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Dopheide A, Tooman LK, Grosser S, Agabiti B, Rhode B, Xie D, Stevens MI, Nelson N, Buckley TR, Drummond AJ, Newcomb RD. Estimating the biodiversity of terrestrial invertebrates on a forested island using DNA barcodes and metabarcoding data. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2019; 29:e01877. [PMID: 30811075 DOI: 10.1002/eap.1877] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 01/13/2019] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
Invertebrates are a major component of terrestrial ecosystems, however, estimating their biodiversity is challenging. We compiled an inventory of invertebrate biodiversity along an elevation gradient on the temperate forested island of Hauturu, New Zealand, by DNA barcoding of specimens obtained from leaf litter samples and pitfall traps. We compared the barcodes and biodiversity estimates from this data set with those from a parallel DNA metabarcoding analysis of soil from the same locations, and with pre-existing sequences in reference databases, before exploring the use of combined data sets as a basis for estimating total invertebrate biodiversity. We obtained 1,282 28S and 1,610 COI barcodes from a total of 1,947 invertebrate specimens, which were clustered into 247 (28S) and 366 (COI) OTUs, of which ≤ 10% were represented in GenBank. Coleoptera were most abundant (730 sequenced specimens), followed by Hymenoptera, Diptera, Lepidoptera, and Amphipoda. The most abundant OTU from both the 28S (153 sequences) and COI (140 sequences) data sets was an undescribed beetle from the family Salpingidae. Based on the occurrences of COI OTUs along the elevation gradient, we estimated there are ~1,000 arthropod species (excluding mites) on Hauturu, including 770 insects, of which 344 are beetles. A DNA metabarcoding analysis of soil DNA from the same sites resulted in the identification of similar numbers of OTUs in most invertebrate groups compared with the DNA barcoding, but less than 10% of the DNA barcoding COI OTUs were also detected by the metabarcoding analysis of soil DNA. A mark-recapture analysis based on the overlap between these data sets estimated the presence of approximately 6,800 arthropod species (excluding mites) on the island, including ~3,900 insects. Estimates of New Zealand-wide biodiversity for selected arthropod groups based on matching of the COI DNA barcodes with pre-existing reference sequences suggested over 13,200 insect species are present, including 4,000 Coleoptera, 2,200 Diptera, and 2,700 Hymenoptera species, and 1,000 arachnid species (excluding mites). These results confirm that metabarcoding analyses of soil DNA tends to recover different components of terrestrial invertebrate biodiversity compared to traditional invertebrate sampling, but the combined methods provide a novel basis for estimating invertebrate biodiversity.
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Affiliation(s)
- Andrew Dopheide
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
- The New Zealand Institute for Plant and Food Research, Private Bag 92169, Auckland, 1142, New Zealand
- Manaaki Whenua-Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
| | - Leah K Tooman
- The New Zealand Institute for Plant and Food Research, Private Bag 92169, Auckland, 1142, New Zealand
| | - Stefanie Grosser
- Manaaki Whenua-Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
- Division of Evolutionary Biology, Faculty of Biology, LMU Munich, Geschwister-Scholl-Platz 1, 80539, 80539, Munich, Germany
| | - Barbara Agabiti
- Centre for Computational Evolution, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Birgit Rhode
- Manaaki Whenua-Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
| | - Dong Xie
- Centre for Computational Evolution, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Mark I Stevens
- South Australian Museum, North Terrace, GPO Box 234, Adelaide, South Australia, 5001, Australia
- School of Pharmacy and Medical Sciences, University of South Australia, GPO Box 2471, Adelaide, South Australia, 5001, Australia
| | - Nicola Nelson
- School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand
| | - Thomas R Buckley
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
- Manaaki Whenua-Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
| | - Alexei J Drummond
- Centre for Computational Evolution, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Richard D Newcomb
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
- The New Zealand Institute for Plant and Food Research, Private Bag 92169, Auckland, 1142, New Zealand
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32
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Cordier T, Lanzén A, Apothéloz-Perret-Gentil L, Stoeck T, Pawlowski J. Embracing Environmental Genomics and Machine Learning for Routine Biomonitoring. Trends Microbiol 2019; 27:387-397. [DOI: 10.1016/j.tim.2018.10.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/17/2018] [Accepted: 10/30/2018] [Indexed: 01/28/2023]
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33
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Stuart OP, Binns M, Umina PA, Holloway J, Severtson D, Nash M, Heddle T, van Helden M, Hoffmann AA. Morphological and Molecular Analysis of Australian Earwigs (Dermaptera) Points to Unique Species and Regional Endemism in the Anisolabididae Family. INSECTS 2019; 10:E72. [PMID: 30875825 PMCID: PMC6468374 DOI: 10.3390/insects10030072] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/03/2019] [Accepted: 03/07/2019] [Indexed: 11/16/2022]
Abstract
Dermaptera (earwigs) from the Anisolabididae family may be important for pest control but their taxonomy and status in Australia is poorly studied. Here we used taxonomic information to assess the diversity of southern Australian Anisolabididae and then applied cox1 barcodes as well as additional gene fragments (mitochondrial and nuclear) to corroborate classification and assess the monophyly of the putative genera. Anisolabididae morphospecies fell into two genera, Anisolabis Fieber and Gonolabis Burr, based on paramere morphology. Combinations of paramere and forceps morphology distinguished seven morphospecies, which were further supported by morphometric analyses. The morphospecies were corroborated by barcode data; all showed within-species genetic distance < 4% and between-species genetic distance > 10%. Molecular phylogenies did not support monophyly of putative genera nor clades based on paramere shape, instead pointing to regional clades distinguishable by forceps morphology. This apparent endemism needs to be further tested by sampling of earwig diversity outside of agricultural production regions but points to a unique regional insect fauna potentially important in pest control.
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Affiliation(s)
- Oliver P Stuart
- School of BioSciences, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3052, Australia.
| | - Matthew Binns
- School of BioSciences, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3052, Australia.
- Agriculture and Food Business Unit, Commonwealth Scientific and Industrial Research Organisation, Black Mountain, Australian Capital Territory 2601, Australia.
| | - Paul A Umina
- School of BioSciences, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3052, Australia.
- Cesar, 293 Royal Parade, Parkville, Victoria 3052, Australia.
| | - Joanne Holloway
- New South Wales Department of Primary Industries, Wagga Wagga Agricultural Institute, Pine Gully Road, Charles Sturt University, New South Wales 2795, Australia.
| | - Dustin Severtson
- Department of Primary Industries and Regional Development, South Perth, Western Australia 6151, Australia.
| | - Michael Nash
- School of Agriculture, Food and Wine, the University of Adelaide, Urrbrae, South Australia 5064, Australia.
- School of Life Science, College of Science, Health and Engineering, La Trobe University, Bundoora, Victoria 3086, Australia.
| | - Thomas Heddle
- South Australian Research and Development Institute, Entomology, Waite Road, Waite, Urrbrae, South Australia 5064, Australia.
| | - Maarten van Helden
- School of Agriculture, Food and Wine, the University of Adelaide, Urrbrae, South Australia 5064, Australia.
- South Australian Research and Development Institute, Entomology, Waite Road, Waite, Urrbrae, South Australia 5064, Australia.
| | - Ary A Hoffmann
- School of BioSciences, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3052, Australia.
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Bagley M, Pilgrim E, Knapp M, Yoder C, Domingo JS, Banerji A. High-throughput environmental DNA analysis informs a biological assessment of an urban stream. ECOLOGICAL INDICATORS 2019; 104:378-389. [PMID: 31275063 PMCID: PMC6605098 DOI: 10.1016/j.ecolind.2019.04.088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There is growing interest in the use of DNA barcoding and metabarcoding approaches to aid biological assessments and monitoring of waterbodies. While biodiversity measured by morphology and by DNA often has been found correlated, few studies have compared DNA data to established measures of impairment such as multimetric pollution tolerance indices used by many bioassessment programs. We incorporated environmental DNA (eDNA) metabarcoding of seston into a rigorous watershed-scale biological assessment of an urban stream to examine the extent to which eDNA richness and diversity patterns were correlated with multimetric indices and ecological impairment status designations. We also evaluated different filtering approaches and taxonomic classifications to identify best practices for environmental assessments. Seston eDNA revealed a wide diversity of eukaryotic taxa but was dominated by diatoms (36%). Differentiation among sites in alpha and beta diversity was greater when operational taxonomic units (OTUs) were classified taxonomically, but coarse resolution taxonomy (kingdom) was more informative than finer resolution taxonomy (family, genus). Correlations of DNA richness and diversity with multimetric indices for fish and macroinvertebrates were generally weak, possibly because Metazoa were not highly represented in our DNA dataset. Nonetheless, sites could be differentiated based on ecological impairment status, with more impaired sites having lower eDNA diversity as measured by the Shannon index, but higher taxonomic richness. Significant environmental drivers of community structure, as inferred from constrained ordination analyses, differed among kingdoms within the eDNA dataset, as well as from fish and macrobenthos, suggesting that eDNA provides novel environmental information. These results suggest that even a simple seston eDNA filtering protocol can provide biodiversity information of value to stream bioassessment programs. The approach bears further investigation as a potentially useful rapid assessment protocol to supplement more intensive field sampling efforts.
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Affiliation(s)
- Mark Bagley
- United States Environmental Protection Agency, Office of Research and Development, 26 Martin Luther King Drive, Cincinnati, OH 45268, United States
| | - Erik Pilgrim
- United States Environmental Protection Agency, Office of Research and Development, 26 Martin Luther King Drive, Cincinnati, OH 45268, United States
| | - Martin Knapp
- Midwest Biodiversity Institute, 4673 Northwest Parkway, Hilliard, OH 43026, United States
| | - Chris Yoder
- Midwest Biodiversity Institute, 4673 Northwest Parkway, Hilliard, OH 43026, United States
| | - Jorge Santo Domingo
- United States Environmental Protection Agency, Office of Research and Development, 26 Martin Luther King Drive, Cincinnati, OH 45268, United States
| | - Aabir Banerji
- United States Environmental Protection Agency, Office of Research and Development, 26 Martin Luther King Drive, Cincinnati, OH 45268, United States
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DNA barcodes of Antipode marine invertebrates in Bay of Biscay and Gulf of Lion ports suggest new biofouling challenges. Sci Rep 2018; 8:16214. [PMID: 30385812 PMCID: PMC6212436 DOI: 10.1038/s41598-018-34447-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 10/17/2018] [Indexed: 11/08/2022] Open
Abstract
Marine biological invasions threaten global biodiversity nowadays. In this article, we have studied fouling communities from 10 port areas of south Bay of Biscay (Atlantic Ocean) and Gulf of Lion (Mediterranean Sea). A total of 834 individuals were genetically barcoded and corresponded to 95 different species. A total of 76 native species 8 genera and 1 family were identified, 58 from the Bay of Biscay and 23 from the Gulf of Lion. Furthermore, 19 species were identified as non-indigenous or cryptogenic (18 from the Bay of Biscay and 4 from the Gulf of Lion). We found a high proportion of Antipode non-indigenous species (NIS) that represented the 19.3% of all sampled individuals and the 54.21% of NIS specimens of this study. A framework for inference of donor regions based on a phylogenetic screening of genetic sequences was proposed as a proof of concept and tested, as well as models for the relationship between NIS introductions, maritime imports and distance to NIS native range and inferred donor areas. Consistent generalized linear models (GLM) with positive association between NIS genetic diversity and distance, not with maritime growth weight imports, strongly suggest that distant NIS could pose higher invasion risk than closer species. Selection for wider tolerance ranges during the long travel -direct or stepwise, as well as environmental similarity between donor and receiving regions, may explain these results.
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DNA Barcoding and Taxonomic Challenges in Describing New Putative Species: Examples from Sootywing and Cloudywing Butterflies (Lepidoptera: Hesperiidae). DIVERSITY 2018. [DOI: 10.3390/d10040111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
DNA barcoding has resulted in the ‘discovery’ of a vast number of new species and subspecies. Assigning formal scientific names to these taxa remains a major challenge. Names sometimes are newly designated. Alternatively, available valid names can be resurrected from synonymy, based on barcode analyses together with classical taxonomic characters. For the most part, however, new putative species revealed by barcoding studies go undescribed. This situation is most often attributed to insufficient taxonomic expertise with the authors conducting the study, together with a critical lack of formally trained taxonomists. However, even with formal training, and additional supportive data from morphological, ecological or life history characters, other factors can arise that impede new species descriptions. In the present paper, several specific taxonomic challenges that have arisen from barcode analyses in two groups of skipper butterflies (Lepidoptera: Hesperiidae), the Sootywings (Pholisora catullus and P. mejicanus) and the Coyote Cloudywing (Achalarus toxeus) are highlighted and discussed. Both P. catullus and A. toxeus show relatively large intraspecific genetic divergences of barcodes (2–3%) which suggests the possibility of previously unrecognized cryptic speciation within each group. Some of the challenges to providing formal names and clarifying taxonomic status of these cryptic taxa could be largely overcome by (1) barcoding type specimens, (2) clarifying imprecise and often vague or suspect type localities, and (3) by conducting in-depth comparative studies on genitalic morphology.
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Metagenomic sequencing of environmental DNA reveals marine faunal assemblages from the West Antarctic Peninsula. Mar Genomics 2018; 37:148-160. [DOI: 10.1016/j.margen.2017.11.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 10/18/2017] [Accepted: 11/15/2017] [Indexed: 01/15/2023]
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Ballesteros JA, Hormiga G. Species delimitation of the North American orchard-spider Leucauge venusta (Walckenaer, 1841) (Araneae, Tetragnathidae). Mol Phylogenet Evol 2018; 121:183-197. [PMID: 29337274 DOI: 10.1016/j.ympev.2018.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 12/28/2017] [Accepted: 01/02/2018] [Indexed: 12/17/2022]
Abstract
The orchard spider, Leucauge venusta (Walckenaer, 1841) is one of the most common and abundant orb-weavers in North America. This species has a broad geographic distribution extending across tropical and temperate regions of the Americas from Canada to Brazil. Guided by a preliminary observation of the barcode gap between sequences from specimens of L. venusta collected in Florida and other North American localities, we collected across a transect through the southeastern USA to investigate the observed genetic divide. The dataset, complemented with additional samples from Mexico, and Brazil was analyzed for species delimitation using STACEY and bGMYC based on sequences from one nuclear (ITS2) and one mitochondrial marker (COI). The analyses clearly separate USA samples into two deeply divergent and geographically structured groups (north-south) which we interpret as two different species. We generated ecological niche models for these two groups rejecting a niche equivalence hypothesis for these lineages. Taxonomic changes are proposed based on these findings, Leucauge venusta is restricted to denote the northern clade, and its known distribution restricted to the USA. Leucauge argyrobapta (White, 1841) is removed from synonymy to denote the populations in Florida, Mexico and Brazil. Although the delimitation analyses suggest each of these geographic clusters within the L. argyrobapta samples represent different species, more specimens from Central and South America are needed to properly test the cohesion of L. argyrobapta populations.
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Affiliation(s)
- Jesús A Ballesteros
- Department of Biological Sciences, The George Washington University, 2029 G Street NW, Bell Hall 302, Washington, DC 20052, United States; Department of Integrative Biology, University of Wisconsin-Madison, 430 Lincoln Dr., Madison, WI 53706, United States.
| | - Gustavo Hormiga
- Department of Biological Sciences, The George Washington University, 2029 G Street NW, Bell Hall 302, Washington, DC 20052, United States
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Trebitz AS, Hoffman JC, Darling JA, Pilgrim EM, Kelly JR, Brown EA, Chadderton WL, Egan SP, Grey EK, Hashsham SA, Klymus KE, Mahon AR, Ram JL, Schultz MT, Stepien CA, Schardt JC. Early detection monitoring for aquatic non-indigenous species: Optimizing surveillance, incorporating advanced technologies, and identifying research needs. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 202:299-310. [PMID: 28738203 PMCID: PMC5927374 DOI: 10.1016/j.jenvman.2017.07.045] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/13/2017] [Accepted: 07/16/2017] [Indexed: 05/19/2023]
Abstract
Following decades of ecologic and economic impacts from a growing list of nonindigenous and invasive species, government and management entities are committing to systematic early- detection monitoring (EDM). This has reinvigorated investment in the science underpinning such monitoring, as well as the need to convey that science in practical terms to those tasked with EDM implementation. Using the context of nonindigenous species in the North American Great Lakes, this article summarizes the current scientific tools and knowledge - including limitations, research needs, and likely future developments - relevant to various aspects of planning and conducting comprehensive EDM. We begin with the scope of the effort, contrasting target-species with broad-spectrum monitoring, reviewing information to support prioritization based on species and locations, and exploring the challenge of moving beyond individual surveys towards a coordinated monitoring network. Next, we discuss survey design, including effort to expend and its allocation over space and time. A section on sample collection and analysis overviews the merits of collecting actual organisms versus shed DNA, reviews the capabilities and limitations of identification by morphology, DNA target markers, or DNA barcoding, and examines best practices for sample handling and data verification. We end with a section addressing the analysis of monitoring data, including methods to evaluate survey performance and characterize and communicate uncertainty. Although the body of science supporting EDM implementation is already substantial, research and information needs (many already actively being addressed) include: better data to support risk assessments that guide choice of taxa and locations to monitor; improved understanding of spatiotemporal scales for sample collection; further development of DNA target markers, reference barcodes, genomic workflows, and synergies between DNA-based and morphology-based taxonomy; and tools and information management systems for better evaluating and communicating survey outcomes and uncertainty.
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Affiliation(s)
- Anett S Trebitz
- U.S. Environmental Protection Agency, National Health and Environmental Effects Laboratory, Duluth, MN, 55804, USA.
| | - Joel C Hoffman
- U.S. Environmental Protection Agency, National Health and Environmental Effects Laboratory, Duluth, MN, 55804, USA.
| | - John A Darling
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Durham, NC, 27713, USA.
| | - Erik M Pilgrim
- U.S. Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, OH, 45268, USA.
| | - John R Kelly
- U.S. Environmental Protection Agency, National Health and Environmental Effects Laboratory, Duluth, MN, 55804, USA.
| | - Emily A Brown
- Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada.
| | - W Lindsay Chadderton
- The Nature Conservancy, c/o Environmental Change Initiative, South Bend, IN, 46617, USA.
| | - Scott P Egan
- Rice University, BioSciences Department, Houston, TX, 77005, USA.
| | - Erin K Grey
- Governors State University, Division of Chemistry and Biological Sciences, University Park, IL, 60484, USA.
| | - Syed A Hashsham
- Engineering Research Center, Michigan State University, East Lansing, MI, 48823, USA.
| | - Katy E Klymus
- University of Toledo, Great Lakes Genetics/Genomics Laboratory, Department of Environmental Sciences, Toledo, OH, 43606, USA.
| | - Andrew R Mahon
- Central Michigan University, Department of Biology, Institute for Great Lakes Research, Mount Pleasant, MI, 48859, USA.
| | - Jeffrey L Ram
- Wayne State University, Department of Physiology, Detroit, MI, 48201, USA.
| | - Martin T Schultz
- U.S. Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, 39180, USA.
| | - Carol A Stepien
- National Oceanic and Atmospheric Administration, Pacific Marine Environmental Lab, Seattle, WA, 98115, USA.
| | - James C Schardt
- U.S. Environmental Protection Agency, Great Lakes National Program Office, Chicago, IL, 60604, USA.
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Kambestad M, Kirkendall LR, Knutsen IL, Jordal BH. Cryptic and pseudo-cryptic diversity in the world’s most common bark beetle—Hypothenemus eruditus. ORG DIVERS EVOL 2017. [DOI: 10.1007/s13127-017-0334-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rulik B, Eberle J, Mark L, Thormann J, Jung M, Köhler F, Apfel W, Weigel A, Kopetz A, Köhler J, Fritzlar F, Hartmann M, Hadulla K, Schmidt J, Hörren T, Krebs D, Theves F, Eulitz U, Skale A, Rohwedder D, Kleeberg A, Astrin JJ, Geiger MF, Wägele JW, Grobe P, Ahrens D. Using taxonomic consistency with semi‐automated data pre‐processing for high quality
DNA
barcodes. Methods Ecol Evol 2017. [DOI: 10.1111/2041-210x.12824] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Björn Rulik
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für molekulare Biodiversitätsforschung (zmb) Bonn Germany
| | - Jonas Eberle
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für Taxonomie und Evolution (ZTE) Bonn Germany
| | - Laura Mark
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für molekulare Biodiversitätsforschung (zmb) Bonn Germany
| | - Jana Thormann
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für molekulare Biodiversitätsforschung (zmb) Bonn Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Ute Eulitz
- c/o Senckenberg Naturhistorische Sammlungen DresdenMuseum für Tierkunde Dresden Germany
| | | | - Dirk Rohwedder
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für Taxonomie und Evolution (ZTE) Bonn Germany
| | | | - Jonas J. Astrin
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für molekulare Biodiversitätsforschung (zmb) Bonn Germany
| | - Matthias F. Geiger
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für molekulare Biodiversitätsforschung (zmb) Bonn Germany
| | - J. Wolfgang Wägele
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für Taxonomie und Evolution (ZTE) Bonn Germany
| | - Peter Grobe
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für Taxonomie und Evolution (ZTE) Bonn Germany
| | - Dirk Ahrens
- Zoologisches Forschungsmuseum Alexander KoenigZentrum für Taxonomie und Evolution (ZTE) Bonn Germany
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42
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Identification of wood-boring beetles (Cerambycidae and Buprestidae) intercepted in trade-associated solid wood packaging material using DNA barcoding and morphology. Sci Rep 2017; 7:40316. [PMID: 28091577 PMCID: PMC5238391 DOI: 10.1038/srep40316] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 12/05/2016] [Indexed: 11/09/2022] Open
Abstract
Global trade facilitates the inadvertent movement of insect pests and subsequent establishment of populations outside their native ranges. Despite phytosanitary measures, nonnative insects arrive at United States (U.S.) ports of entry as larvae in solid wood packaging material (SWPM). Identification of wood-boring larval insects is important for pest risk analysis and management, but is difficult beyond family level due to highly conserved morphology. Therefore, we integrated DNA barcoding and rearing of larvae to identify wood-boring insects in SWPM. From 2012 to 2015, we obtained larvae of 338 longhorned beetles (Cerambycidae) and 38 metallic wood boring beetles (Buprestidae) intercepted in SWPM associated with imported products at six U.S. ports. We identified 265 specimens to species or genus using DNA barcodes. Ninety-three larvae were reared to adults and identified morphologically. No conflict was found between the two approaches, which together identified 275 cerambycids (23 genera) and 16 buprestids (4 genera). Our integrated approach confirmed novel DNA barcodes for seven species (10 specimens) of woodborers not in public databases. This study demonstrates the utility of DNA barcoding as a tool for regulatory agencies. We provide important documentation of potential beetle pests that may cross country borders through the SWPM pathway.
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Darling JA, Galil BS, Carvalho GR, Rius M, Viard F, Piraino S. Recommendations for developing and applying genetic tools to assess and manage biological invasions in marine ecosystems. MARINE POLICY 2017; 85:56-64. [PMID: 29681680 PMCID: PMC5909192 DOI: 10.1016/j.marpol.2017.08.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The European Union's Marine Strategy Framework Directive (MSFD) aims to adopt integrated ecosystem management approaches to achieve or maintain "Good Environmental Status" for marine waters, habitats and resources, including mitigation of the negative effects of non-indigenous species (NIS). The Directive further seeks to promote broadly standardized monitoring efforts and assessment of temporal trends in marine ecosystem condition, incorporating metrics describing the distribution and impacts of NIS. Accomplishing these goals will require application of advanced tools for NIS surveillance and risk assessment, particularly given known challenges associated with surveying and monitoring with traditional methods. In the past decade, a host of methods based on nucleic acids (DNA and RNA) analysis have been developed or advanced that promise to dramatically enhance capacity in assessing and managing NIS. However, ensuring that these rapidly evolving approaches remain accessible and responsive to the needs of resource managers remains a challenge. This paper provides recommendations for future development of these genetic tools for assessment and management of NIS in marine systems, within the context of the explicit requirements of the MSFD. Issues considered include technological innovation, methodological standardization, data sharing and collaboration, and the critical importance of shared foundational resources, particularly integrated taxonomic expertise. Though the recommendations offered here are not exhaustive, they provide a basis for future intentional (and international) collaborative development of a genetic toolkit for NIS research, capable of fulfilling the immediate and long term goals of marine ecosystem and resource conservation.
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Affiliation(s)
- John A. Darling
- National Exposure Research Laboratory, United States Environmental
Protection Agency, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711,
USA
- Corresponding author.
(J.A. Darling)
| | - Bella S. Galil
- The Steinhardt Museum of Natural History, Israel National Center for
Biodiversity Studies, Tel Aviv University, Tel Aviv 6997801, Israel
| | | | - Marc Rius
- Ocean and Earth Science, National Oceanography Centre, University of
Southampton, UK
- Centre for Ecological Genomics and Wildlife Conservation, University
of Johannesburg, South Africa
| | - Frédérique Viard
- Sorbonne Université, Université Paris 06, CNRS, UMR
7144 AD2M, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff,
France
| | - Stefano Piraino
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali,
Università del Salento, Lecce, Italy
- Consorzio Nazionale Interuniversitario per le Scienze del Mare
(CoNISMa), Roma, Italy
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44
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Littlefair JE, Clare EL. Barcoding the food chain: from Sanger to high-throughput sequencing. Genome 2016; 59:946-958. [DOI: 10.1139/gen-2016-0028] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Society faces the complex challenge of supporting biodiversity and ecosystem functioning, while ensuring food security by providing safe traceable food through an ever-more-complex global food chain. The increase in human mobility brings the added threat of pests, parasites, and invaders that further complicate our agro-industrial efforts. DNA barcoding technologies allow researchers to identify both individual species, and, when combined with universal primers and high-throughput sequencing techniques, the diversity within mixed samples (metabarcoding). These tools are already being employed to detect market substitutions, trace pests through the forensic evaluation of trace “environmental DNA”, and to track parasitic infections in livestock. The potential of DNA barcoding to contribute to increased security of the food chain is clear, but challenges remain in regulation and the need for validation of experimental analysis. Here, we present an overview of the current uses and challenges of applied DNA barcoding in agriculture, from agro-ecosystems within farmland to the kitchen table.
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Affiliation(s)
- Joanne E. Littlefair
- School of Biological and Chemical Sciences, Queen Mary University of London. Mile End Rd., London, E1 4NS, UK
- School of Biological and Chemical Sciences, Queen Mary University of London. Mile End Rd., London, E1 4NS, UK
| | - Elizabeth L. Clare
- School of Biological and Chemical Sciences, Queen Mary University of London. Mile End Rd., London, E1 4NS, UK
- School of Biological and Chemical Sciences, Queen Mary University of London. Mile End Rd., London, E1 4NS, UK
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45
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Walker FM, Williamson CHD, Sanchez DE, Sobek CJ, Chambers CL. Species From Feces: Order-Wide Identification of Chiroptera From Guano and Other Non-Invasive Genetic Samples. PLoS One 2016; 11:e0162342. [PMID: 27654850 PMCID: PMC5031397 DOI: 10.1371/journal.pone.0162342] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 08/22/2016] [Indexed: 11/25/2022] Open
Abstract
Bat guano is a relatively untapped reservoir of information, having great utility as a DNA source because it is often available at roosts even when bats are not and is an easy type of sample to collect from a difficult-to-study mammalian order. Recent advances from microbial community studies in primer design, sequencing, and analysis enable fast, accurate, and cost-effective species identification. Here, we borrow from this discipline to develop an order-wide DNA mini-barcode assay (Species from Feces) based on a segment of the mitochondrial gene cytochrome c oxidase I (COI). The assay works effectively with fecal DNA and is conveniently transferable to low-cost, high-throughput Illumina MiSeq technology that also allows simultaneous pairing with other markers. Our PCR primers target a region of COI that is highly discriminatory among Chiroptera (92% species-level identification of barcoded species), and are sufficiently degenerate to allow hybridization across diverse bat taxa. We successfully validated our system with 54 bat species across both suborders. Despite abundant arthropod prey DNA in guano, our primers were highly specific to bats; no arthropod DNA was detected in thousands of feces run on Sanger and Illumina platforms. The assay is extendable to fecal pellets of unknown age as well as individual and pooled guano, to allow for individual (using singular fecal pellets) and community (using combined pellets collected from across long-term roost sites) analyses. We developed a searchable database (http://nau.edu/CEFNS/Forestry/Research/Bats/Search-Tool/) that allows users to determine the discriminatory capability of our markers for bat species of interest. Our assay has applications worldwide for examining disease impacts on vulnerable species, determining species assemblages within roosts, and assessing the presence of bat species that are vulnerable or facing extinction. The development and analytical pathways are rapid, reliable, and inexpensive, and can be applied to ecology and conservation studies of other taxa.
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Affiliation(s)
- Faith M. Walker
- Bat Ecology & Genetics Laboratory, School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America
- Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Charles H. D. Williamson
- Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Daniel E. Sanchez
- Bat Ecology & Genetics Laboratory, School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America
- Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Colin J. Sobek
- Bat Ecology & Genetics Laboratory, School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America
- Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Carol L. Chambers
- Bat Ecology & Genetics Laboratory, School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America
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Staats M, Arulandhu AJ, Gravendeel B, Holst-Jensen A, Scholtens I, Peelen T, Prins TW, Kok E. Advances in DNA metabarcoding for food and wildlife forensic species identification. Anal Bioanal Chem 2016; 408:4615-30. [PMID: 27178552 PMCID: PMC4909793 DOI: 10.1007/s00216-016-9595-8] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 12/18/2022]
Abstract
Species identification using DNA barcodes has been widely adopted by forensic scientists as an effective molecular tool for tracking adulterations in food and for analysing samples from alleged wildlife crime incidents. DNA barcoding is an approach that involves sequencing of short DNA sequences from standardized regions and comparison to a reference database as a molecular diagnostic tool in species identification. In recent years, remarkable progress has been made towards developing DNA metabarcoding strategies, which involves next-generation sequencing of DNA barcodes for the simultaneous detection of multiple species in complex samples. Metabarcoding strategies can be used in processed materials containing highly degraded DNA e.g. for the identification of endangered and hazardous species in traditional medicine. This review aims to provide insight into advances of plant and animal DNA barcoding and highlights current practices and recent developments for DNA metabarcoding of food and wildlife forensic samples from a practical point of view. Special emphasis is placed on new developments for identifying species listed in the Convention on International Trade of Endangered Species (CITES) appendices for which reliable methods for species identification may signal and/or prevent illegal trade. Current technological developments and challenges of DNA metabarcoding for forensic scientists will be assessed in the light of stakeholders' needs.
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Affiliation(s)
- Martijn Staats
- RIKILT Wageningen UR, P.O. Box 230, 6700 AE, Wageningen, The Netherlands.
| | - Alfred J Arulandhu
- RIKILT Wageningen UR, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
| | - Barbara Gravendeel
- Naturalis Biodiversity Center, Sylviusweg 72, P.O. Box 9517, Leiden, The Netherlands
| | - Arne Holst-Jensen
- Norwegian Veterinary Institute, Ullevaalsveien 68, P.O. Box 750, Sentrum, 0106, Oslo, Norway
| | - Ingrid Scholtens
- RIKILT Wageningen UR, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
| | - Tamara Peelen
- Dutch Customs Laboratory, Kingsfordweg 1, 1043 GN, Amsterdam, The Netherlands
| | - Theo W Prins
- RIKILT Wageningen UR, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
| | - Esther Kok
- RIKILT Wageningen UR, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
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47
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Sundberg P, Andrade SCS, Bartolomaeus T, Beckers P, von Döhren J, Krämer D, Gibson R, Giribet G, Herrera-Bachiller A, Junoy J, Kajihara H, Kvist S, Kånneby T, Sun SC, Thiel M, Turbeville JM, Strand M. The future of nemertean taxonomy (phylum Nemertea) - a proposal. ZOOL SCR 2016. [DOI: 10.1111/zsc.12182] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Per Sundberg
- University of Gothenburg; Department of Marine Sciences; Gothenburg Sweden
| | - Sónia C. S. Andrade
- Departamento de Genética e Biologia Evolutiva; IB-Universidade de; São Paulo Brazil
| | - Thomas Bartolomaeus
- University of Bonn; Institute of Evolutionary Biology and Animal Ecology; Bonn Germany
| | - Patrick Beckers
- University of Bonn; Institute of Evolutionary Biology and Animal Ecology; Bonn Germany
| | - Jörn von Döhren
- University of Bonn; Institute of Evolutionary Biology and Animal Ecology; Bonn Germany
| | - Daria Krämer
- University of Bonn; Institute of Evolutionary Biology and Animal Ecology; Bonn Germany
| | - Ray Gibson
- 94 Queens Avenue, Meols; Wirral CH47 0NA U.K
| | - Gonzalo Giribet
- Museum of Comparative Zoology; Department of Organismic and Evolutionary Biology; Harvard University; Cambridge MA USA
| | | | - Juan Junoy
- Departamento de Ciencias de la Vida; Universidad de Alcalá; Madrid Spain
| | | | - Sebastian Kvist
- Department of Natural History; Royal Ontario Museum; Toronto Canada
- Department of Ecology and Evolutionary Biology; University of Toronto; Toronto Canada
| | - Tobias Kånneby
- Swedish Museum of Natural History; Department of Zoology; Stockholm Sweden
| | - Shi-Chun Sun
- Institute of Evolution & Marine Biodiversity; Ocean University of China; Qingdao China
| | - Martin Thiel
- Facultad Ciencias del Mar; Centro de Estudios Avanzados en Zonas Áridas (CEAZA); Millennium Nucleus Ecology and Sustainable Management of Oceanic Island (ESMOI); Universidad Católica del Norte; Coquimbo Chile
| | | | - Malin Strand
- Swedish Species Information Centre; The Sven Lovén Centre for Marine Sciences; Strömstad Sweden
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48
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Zou S, Fei C, Song J, Bao Y, He M, Wang C. Combining and Comparing Coalescent, Distance and Character-Based Approaches for Barcoding Microalgaes: A Test with Chlorella-Like Species (Chlorophyta). PLoS One 2016; 11:e0153833. [PMID: 27092945 PMCID: PMC4841637 DOI: 10.1371/journal.pone.0153833] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 03/13/2016] [Indexed: 01/19/2023] Open
Abstract
Several different barcoding methods of distinguishing species have been advanced, but which method is the best is still controversial. Chlorella is becoming particularly promising in the development of second-generation biofuels. However, the taxonomy of Chlorella-like organisms is easily confused. Here we report a comprehensive barcoding analysis of Chlorella-like species from Chlorella, Chloroidium, Dictyosphaerium and Actinastrum based on rbcL, ITS, tufA and 16S sequences to test the efficiency of traditional barcoding, GMYC, ABGD, PTP, P ID and character-based barcoding methods. First of all, the barcoding results gave new insights into the taxonomic assessment of Chlorella-like organisms studied, including the clear species discrimination and resolution of potentially cryptic species complexes in C. sorokiniana, D. ehrenbergianum and C. Vulgaris. The tufA proved to be the most efficient barcoding locus, which thus could be as potential "specific barcode" for Chlorella-like species. The 16S failed in discriminating most closely related species. The resolution of GMYC, PTP, P ID, ABGD and character-based barcoding methods were variable among rbcL, ITS and tufA genes. The best resolution for species differentiation appeared in tufA analysis where GMYC, PTP, ABGD and character-based approaches produced consistent groups while the PTP method over-split the taxa. The character analysis of rbcL, ITS and tufA sequences could clearly distinguish all taxonomic groups respectively, including the potentially cryptic lineages, with many character attributes. Thus, the character-based barcoding provides an attractive complement to coalescent and distance-based barcoding. Our study represents the test that proves the efficiency of multiple DNA barcoding in species discrimination of microalgaes.
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Affiliation(s)
- Shanmei Zou
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Cong Fei
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jiameng Song
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yachao Bao
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Meilin He
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Changhai Wang
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China
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49
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Martinsson S, Rhodén C, Erséus C. Barcoding gap, but no support for cryptic speciation in the earthworm Aporrectodea longa (Clitellata: Lumbricidae). Mitochondrial DNA A DNA Mapp Seq Anal 2015; 28:147-155. [PMID: 26709635 DOI: 10.3109/19401736.2015.1115487] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
DNA-barcoding, using the mitochondrial marker COI, has been found successful for the identification of specimens in many animal groups, but may not be suited for species discovery and delimitation if used alone. In this study, we investigate whether two observed COI haplogroups in the earthworm Aporrectodea longa correspond to two cryptic species or if the variation is intraspecific. This is done by complementing COI with two nuclear markers, ITS2 and Histone 3. The variation is studied using distance methods, parsimony networks and Bayesian coalescent trees, and the statistical distinctness of the groups is tested on gene trees using the genealogical sorting index, Rosenberg's PAB and Rodrigo et al.'s P(RD). We also applied multilocus species delimitation based on the multispecies coalescence model. The two haplogroups were found in COI, and all tests except P(RD) found them to be significantly distinct. However, in ITS2, the same groups were not recovered in any analyses or tests. H3 was invariable in A. longa, and was, therefore, included only in the multilocus analysis, which preferred a model treating A. longa as one species over a model splitting it into two. We also compared two measurements of size, body length, and no. of segments between the groups. No difference in body length was found, and although a significant difference in no. of segments was noted the haplogroup with the lower mean showed both the highest and the lowest value. When combined, these results led us to the conclusion that there is no support for the separation of A. longa into two cryptic species. This study again highlights the importance of complementing mitochondrial barcodes with more data when establishing species boundaries.
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Affiliation(s)
- Svante Martinsson
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
| | - Caroline Rhodén
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
| | - Christer Erséus
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
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50
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Falk BG, Reed RN. Challenges to a molecular approach to prey identification in the Burmese python, Python molurus bivittatus. PeerJ 2015; 3:e1445. [PMID: 26623196 PMCID: PMC4662595 DOI: 10.7717/peerj.1445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 11/05/2015] [Indexed: 12/19/2022] Open
Abstract
Molecular approaches to prey identification are increasingly useful in elucidating predator-prey relationships, and we aimed to investigate the feasibility of these methods to document the species identities of prey consumed by invasive Burmese pythons in Florida. We were particularly interested in the diet of young snakes, because visual identification of prey from this size class has proven difficult. We successfully extracted DNA from the gastrointestinal contents of 43 young pythons, as well as from several control samples, and attempted amplification of DNA mini-barcodes, a 130-bp region of COX1. Using a PNA clamp to exclude python DNA, we found that prey DNA was not present in sufficient quality for amplification of this locus in 86% of our samples. All samples from the GI tracts of young pythons contained only hair, and the six samples we were able to identify to species were hispid cotton rats. This suggests that young Burmese pythons prey predominantly on small mammals and that prey diversity among snakes of this size class is low. We discuss prolonged gastrointestinal transit times and extreme gastric breakdown as possible causes of DNA degradation that limit the success of a molecular approach to prey identification in Burmese pythons.
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Affiliation(s)
- Bryan G Falk
- US Geological Survey, Fort Collins Science Center , Fort Collins, CO , USA
| | - Robert N Reed
- US Geological Survey, Fort Collins Science Center , Fort Collins, CO , USA
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