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Tensen L, Fischer K. Evaluating hybrid speciation and swamping in wild carnivores with a decision-tree approach. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024; 38:e14197. [PMID: 37811741 DOI: 10.1111/cobi.14197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/12/2023] [Accepted: 06/28/2023] [Indexed: 10/10/2023]
Abstract
Hybridization is an important evolutionary force with a principal role in the origin of new species, known as hybrid speciation. However, ongoing hybridization can create hybrid swamping, in which parental genomes are completely lost. This can become a biodiversity threat if it involves species that have adapted to certain environmental conditions and occur nowhere else. Because conservation scientists commonly have a negative attitude toward hybrids, it is important to improve understanding of the influence of interspecific gene flow on the persistence of species. We reviewed the literature on species hybridization to build a list of all known cases in the order Carnivora. To examine the relative impact, we also noted level of introgression, whether fertile offspring were produced, and whether there was mention of negative or positive evolutionary effects (hybrid speciation and swamping). To evaluate the conservation implications of hybrids, we developed a decision-making tree with which to determine which actions should be taken to manage hybrid species. We found 53 hybrids involving 68 unique taxa, which is roughly 23% of all carnivore species. They mainly involved monophyletic (83%) and sympatric species (75%). For 2 species, the outcome of the assessment was to eliminate or restrict the hybrids: Ethiopian wolf (Canis simensis) and Scottish wildcat (Felis silvestris silvestris). Both species hybridize with their domestic conspecifics. For all other cases, we suggest hybrids be protected in the same manner as native species. We found no evidence of genomic extinction in Carnivora. To the contrary, some species appear to be of hybrid origin, such as the Asiatic black bear (Ursus thibetanus) and African golden wolf (Canis lupaster). Other positive outcomes of hybridization are novel genetic diversity, adaptation to extreme environments, and increased reproductive fitness. These outcomes are particularly valuable for counterbalancing genetic drift and enabling adaptive introgression in a human-dominated world.
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Affiliation(s)
- Laura Tensen
- Institute for Integrated Natural Sciences, Department of Zoology, University of Koblenz, Koblenz, Germany
- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, University of Johannesburg, Johannesburg, South Africa
| | - Klaus Fischer
- Institute for Integrated Natural Sciences, Department of Zoology, University of Koblenz, Koblenz, Germany
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Fachinello MC, Romero JHC, Chiba de Castro WA. Defining invasive species and demonstrating impacts of biological invasions: a scientometric analysis of studies on invasive alien plants in Brazil over the past 20 years. NEOBIOTA 2022. [DOI: 10.3897/neobiota.76.85881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Despite biological invasions being widely recognised as an important driver of environmental change, lack of consensus regarding the definition of invasive alien species (IAS) and vagueness around the demonstration of their impacts limits knowledge and research in this field. In this study, a scientometric approach was used to analyse academic documents published between 2002 and 2021 in three databases with reference to invasive alien plants in Brazil. Despite the growing body of scientific literature in the area, only 10% of the publications provided some definition of invasive species. Of the 398 publications analysed, 23.6% found some type of damage caused by the invader and, of these, only 5% addressed economic or social damage. Only 17% of the publications proposed a method for controlling and/or mitigating biological invasions. The absence of clear terminology and the lack of focus on impacts limits understanding of IAS of plants in Brazil. Based on the present findings, future studies on IAS of plants should move towards a consensus on the definition of biological invasion, as well as understand the impact caused by these species. In addition, it is recommended that further scientometric studies should guide future efforts to support objective measures for management and decision-making.
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Paap T, Wingfield MJ, Burgess TI, Hulbert JM, Santini A. Harmonising the fields of invasion science and forest pathology. NEOBIOTA 2020. [DOI: 10.3897/neobiota.62.52991] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Invasive alien species are widely recognised as significant drivers of global environmental change, with far reaching ecological and socio-economic impacts. The trend of continuous increases in first records, with no apparent sign of saturation, is consistent across all taxonomic groups. However, taxonomic biases exist in the extent to which invasion processes have been studied. Invasive forest pathogens have caused, and they continue to result in dramatic damage to natural forests and woody ecosystems, yet their impacts are substantially underrepresented in the invasion science literature. Conversely, most studies of forest pathogens have been undertaken in the absence of a connection to the frameworks developed and used to study biological invasions. We believe this is, in part, a consequence of the mechanistic approach of the discipline of forest pathology; one that has been inherited from the broader discipline of plant pathology. Rather than investigating the origins of, and the processes driving the arrival of invasive microorganisms, the focus of pathologists is generally to investigate specific interactions between hosts and pathogens, with an emphasis on controlling the resulting disease problems. In contrast, central to the field of invasion science, which finds its roots in ecology, is the development and testing of general concepts and frameworks. The lack of knowledge of microbial biodiversity and ecology, speciation and geographic origin present challenges in understanding invasive forest pathogens under existing frameworks, and there is a need to address this shortfall. Advances in molecular technologies such as gene and genome sequencing and metagenomics studies have increased the “visibility” of microorganisms. We consider whether these technologies are being adequately applied to address the gaps between forest pathology and invasion science. We also interrogate the extent to which the two fields stand to gain by becoming more closely linked.
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Pereyra PJ. Rethinking the native range concept. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2020; 34:373-377. [PMID: 31385368 DOI: 10.1111/cobi.13406] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 06/21/2019] [Accepted: 07/01/2019] [Indexed: 06/10/2023]
Abstract
A species is not native outside its native range, but native range is not precisely defined. The invasion literature contains wide discussion of the core concepts such as naturalization, invasiveness, and ecological impact, but the concept of native range has received so little attention that a formal definition does not exist. I considered, among other impediments to a formal definition of native range, the sometimes arbitrariness of the spatial and temporal limits assigned to native range. Broad questions that remain include whether invasion theory can be used to define the native range for species without non-native ranges.
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Affiliation(s)
- Patricio Javier Pereyra
- Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS), San Antonio Oeste, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Escuela Superior de Ciencias Marinas, Universidad Nacional del Comahue, San Antonio Oeste, Río Negro, Argentina
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Ribeiro FS, Nichols E, Morato RG, Metzger JP, Pardini R. Disturbance or propagule pressure? Unravelling the drivers and mapping the intensity of invasion of free‐ranging dogs across the Atlantic forest hotspot. DIVERS DISTRIB 2018. [DOI: 10.1111/ddi.12845] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Fernando S. Ribeiro
- Departamento de Ecologia Instituto de Biociências Universidade de São Paulo São Paulo São Paulo Brazil
| | | | - Ronaldo G. Morato
- Centro Nacional de Pesquisa e Conservação de Mamíferos Carnívoros Instituto Chico Mendes de Conservação da Biodiversidade Atibaia São Paulo Brazil
| | - Jean Paul Metzger
- Departamento de Ecologia Instituto de Biociências Universidade de São Paulo São Paulo São Paulo Brazil
| | - Renata Pardini
- Departamento de Zoologia Instituto de Biociências Universidade de São Paulo São Paulo São Paulo Brazil
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Boltovskoy D, Sylvester F, Paolucci EM. Invasive species denialism: Sorting out facts, beliefs, and definitions. Ecol Evol 2018; 8:11190-11198. [PMID: 30519436 PMCID: PMC6262740 DOI: 10.1002/ece3.4588] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/11/2018] [Accepted: 09/13/2018] [Indexed: 11/24/2022] Open
Abstract
In the last decades, thousands of investigations confirmed the detrimental effects of species translocated by man outside of their native ranges (nonindigenous species, or NIS). However, results concluding that many NIS have null, neutral, or positive impacts on the biota and on human interests are as common in the scientific literature as those that point at baneful impacts. Recently, several scholars confronted the stand that origin per se is not a reliable indicator of negative effects, suggesting that such conclusions are the expression of scientific denialism, often led by spurious purposes, and that their numbers are increasing. When assessed in the context of the growing interest in introduced species, the proportion of academic publications claiming that NIS pose no threats to the environment and to social and economic interests is extremely low, and has not increased since 1990. The widely prevailing notion that many NIS are effectively or potentially harmful does not conflict with the fact that most have mixed (negative, neutral, and positive) impacts. When based on solid grounds, reports of positive or neutral impacts should not be labeled as manipulative or misleading unless proven otherwise, even if they may hamper interest in- and funding of research and control bioinvasion programs.
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Affiliation(s)
- Demetrio Boltovskoy
- IEGEBA (CONICET‐UBA), Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
| | - Francisco Sylvester
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
- Instituto para el Estudio de la Biodiversidad de Invertebrados (IEBI), Facultad de Ciencias NaturalesUniversidad Nacional de SaltaSaltaArgentina
| | - Esteban M. Paolucci
- IEGEBA (CONICET‐UBA), Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
- Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (CONICET‐MACN)Buenos AiresArgentina
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Guiaşu RC, Tindale CW. Logical fallacies and invasion biology. BIOLOGY & PHILOSOPHY 2018; 33:34. [PMID: 30220757 PMCID: PMC6133178 DOI: 10.1007/s10539-018-9644-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 09/01/2018] [Indexed: 05/30/2023]
Abstract
Leading invasion biologists sometimes dismiss critics and criticisms of their field by invoking "the straw man" fallacy. Critics of invasion biology are also labelled as a small group of "naysayers" or "contrarians", who are sometimes engaging in "science denialism". Such unfortunate labels can be seen as a way to possibly suppress legitimate debates and dismiss or minimize reasonable concerns about some aspects of invasion biology, including the uncertainties about the geographic origins and complex environmental impacts of species, and the control programs against species perceived as "invasive". In assessing the quality of the debate in this area, we examine the validity of the use of various strategies, including the "straw man" concept, and explore a range of potential logical fallacies present in some recent prominent discussions about invasion biology and so-called "invasive" species. The goal is to add some clarity to the concepts involved, point out some problematic issues, and improve the quality of the debates as the discussions move forward.
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Affiliation(s)
- Radu Cornel Guiaşu
- Biology Program and Environmental and Health Studies Program, Department of Multidisciplinary Studies, Glendon College, York University, 2275 Bayview Avenue, Toronto, ON M4N 3M6 Canada
| | - Christopher W. Tindale
- Department of Philosophy, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4 Canada
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A dynamic energy budget model to describe the reproduction and growth of invasive starfish Asterias amurensis in southeast Australia. Biol Invasions 2018. [DOI: 10.1007/s10530-018-1676-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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The Hitchhiker Wave: Non-native Small Terrestrial Vertebrates in the Galapagos. UNDERSTANDING INVASIVE SPECIES IN THE GALAPAGOS ISLANDS 2018. [DOI: 10.1007/978-3-319-67177-2_7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Erickson DL, Reed E, Ramachandran P, Bourg NA, McShea WJ, Ottesen A. Reconstructing a herbivore's diet using a novel rbcL DNA mini-barcode for plants. AOB PLANTS 2017; 9:plx015. [PMID: 28533898 PMCID: PMC5434754 DOI: 10.1093/aobpla/plx015] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 03/28/2017] [Accepted: 04/13/2017] [Indexed: 05/05/2023]
Abstract
Next Generation Sequencing and the application of metagenomic analyses can be used to answer questions about animal diet choice and study the consequences of selective foraging by herbivores. The quantification of herbivore diet choice with respect to native versus exotic plant species is particularly relevant given concerns of invasive species establishment and their effects on ecosystems. While increased abundance of white-tailed deer (Odocoileus virginianus) appears to correlate with increased incidence of invasive plant species, data supporting a causal link is scarce. We used a metabarcoding approach (PCR amplicons of the plant rbcL gene) to survey the diet of white-tailed deer (fecal samples), from a forested site in Warren County, Virginia with a comprehensive plant species inventory and corresponding reference collection of plant barcode and chloroplast sequences. We sampled fecal pellet piles and extracted DNA from 12 individual deer in October 2014. These samples were compared to a reference DNA library of plant species collected within the study area. For 72 % of the amplicons, we were able to assign taxonomy at the species level, which provides for the first time-sufficient taxonomic resolution to quantify the relative frequency at which native and exotic plant species are being consumed by white-tailed deer. For each of the 12 individual deer we collected three subsamples from the same fecal sample, resulting in sequencing 36 total samples. Using Qiime, we quantified the plant DNA found in all 36 samples, and found that variance within samples was less than variance between samples (F = 1.73, P = 0.004), indicating additional subsamples may not be necessary. Species level diversity ranged from 60 to 93 OTUs per individual and nearly 70 % of all plant sequences recovered were from native plant species. The number of species detected did reduce significantly (range 4-12) when we excluded species whose OTU composed <1 % of each sample's total. When compared to the abundance of native and non-natives plants inventoried in the local community, our results support the observation that white-tailed deer have strong foraging preferences, but these preferences were not consistent for species in either class. Deer forage behaviour may favour some exotic species, but not all.
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Affiliation(s)
- David L. Erickson
- Molecular Methods and Subtyping Branch, Division of Microbiology, Centre for Food Safety and Applied Nutrition (CFSAN), FDA, 5001 Campus Drive, College Park, ML 20740, USA
| | - Elizabeth Reed
- Molecular Methods and Subtyping Branch, Division of Microbiology, Centre for Food Safety and Applied Nutrition (CFSAN), FDA, 5001 Campus Drive, College Park, ML 20740, USA
| | - Padmini Ramachandran
- Molecular Methods and Subtyping Branch, Division of Microbiology, Centre for Food Safety and Applied Nutrition (CFSAN), FDA, 5001 Campus Drive, College Park, ML 20740, USA
| | - Norman A. Bourg
- U.S. Geological Survey, National Research Program - Eastern Branch, 12201 Sunrise Valley Drive, MS 430, Reston, VA 20192, USA
| | - William J. McShea
- Smithsonian Conservation Biology Institute, National Zoological Park, 1500 Remount Road, Front Royal, VA 22630, USA
| | - Andrea Ottesen
- Molecular Methods and Subtyping Branch, Division of Microbiology, Centre for Food Safety and Applied Nutrition (CFSAN), FDA, 5001 Campus Drive, College Park, ML 20740, USA
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Burgess TI, Crous CJ, Slippers B, Hantula J, Wingfield MJ. Tree invasions and biosecurity: eco-evolutionary dynamics of hitchhiking fungi. AOB PLANTS 2017; 8:plw076. [PMID: 27821517 PMCID: PMC5206332 DOI: 10.1093/aobpla/plw076] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/26/2016] [Indexed: 05/28/2023]
Abstract
When non-native plants reach novel environments, they typically arrive with hidden microbiomes. In general, most of these hitchhikers remain on their co-evolved hosts, some contribute to the invasiveness of their hosts, and a small number can undergo host shifts and move onto native hosts. Invasion success can vary depending upon the different categories of fungal associates. When an invader tree relies on a fungal mutualism to survive in the new environment, there is a fundamentally lower likelihood of either the tree, or the fungus, establishing novel associations. In contrast, parasitic hitchhikers could merely use their host plants to move through the landscape and to become established on new hosts (host shifts). Evidence suggests the frequency of these host shifts is low and depends upon the fungal functional group. However, epidemics caused by invasive pathogens in native ecosystems have occurred globally. Thus, elucidating the potential for hidden non-native fungi to form novel host associations in a new environment is important for biodiversity conservation.
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Affiliation(s)
- Treena I Burgess
- Centre of Phytophthora Science and Management, School of Veterinary and Life Science, Murdoch University, Murdoch 6150, Australia
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
| | - Casparus J Crous
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
- Present address: Centre for Ecology, Evolution and Environmental Changes, Faculty of Sciences, University of Lisbon, Campo Grande, Lisbon 1749-016, Portugal
| | - Bernard Slippers
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
| | - Jarkko Hantula
- Natural Resources Institute Finland, Natural Resources and Bioproduction Unit, Vantaa 01300, Finland
| | - Michael J Wingfield
- Centre of Phytophthora Science and Management, School of Veterinary and Life Science, Murdoch University, Murdoch 6150, Australia
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
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