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Lo Parrino E, Ficetola GF, Devin M, Manenti R, Falaschi M. Integrating adult occurrence and reproduction data to identify conservation measures for amphibians. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024:e14343. [PMID: 39166831 DOI: 10.1111/cobi.14343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 04/09/2024] [Accepted: 05/04/2024] [Indexed: 08/23/2024]
Abstract
Monitoring programs are pivotal to establishing sound management. Due to economic, logistic, and time limitations, monitoring programs often overlook differences among life-history stages. However, species occurrence does not necessarily mean population viability, and it is unclear to what extent monitoring programs that do not consider separately adult presence and reproduction provide effective management indications. Unfortunately, collecting data on certain life stages requires high sampling effort, leading to a trade-off between model reliability and resources needed for monitoring. We collected data on presence and reproduction of amphibians by monitoring 207 waterbodies in Lombardy (northern Italy) in 2017-2022. We then used multistate occupancy models to test whether certain environmental features, namely, pond area, hydroperiod, forest cover, shade, aquatic vegetation, and predators' presence, differentially affected adult occurrence and breeding probabilities of multiple amphibian species. To assess optimal sampling efforts, we modeled the detection probabilities of adults and reproduction across multiple species. Finally, we identified the optimal monitoring strategy under different scenarios of resource availability, comparing adult-only monitoring versus joint assessment of the occurrence of adults and reproduction. In many cases, the main drivers of adult occurrence and reproduction did not coincide because most investigated ecological variables affected one life stage or the other. Forest area, for instance, increased occurrence probabilities of adults of the endemic Rana latastei but showed no effect on their reproduction probabilities. Quantitative estimates of the sampling effort showed that occurrence of adults was easier to spot in 4 out of 7 species. Multicriteria decision analyses showed that when resources were scarce, monitoring adults was the optimal strategy for those 4 species. Conversely, with more resources, monitoring both adults and reproduction emerged as the best strategy for all the considered species. Integrated monitoring of adults and reproduction is essential to comprehensively identify effective conservation measures for amphibians.
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Affiliation(s)
- Elia Lo Parrino
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, Laboratoire d'Écologie Alpine, Grenoble, France
| | - Michel Devin
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
| | - Mattia Falaschi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
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Peter N, Schantz AV, Dörge DD, Steinhoff A, Cunze S, Skaljic A, Klimpel S. Evidence of predation pressure on sensitive species by raccoons based on parasitological studies. Int J Parasitol Parasites Wildl 2024; 24:100935. [PMID: 38638363 PMCID: PMC11024658 DOI: 10.1016/j.ijppaw.2024.100935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/05/2024] [Accepted: 04/07/2024] [Indexed: 04/20/2024]
Abstract
To demonstrate predation and potential impacts of raccoons on various species, a total of 108 raccoons from aquatic-associated nature reserves and natural areas in three federal states of Germany, Hesse (n = 36), Saxony-Anhalt (n = 36) and Brandenburg (n = 36), were investigated from a dietary ecological perspective in the present study. Fecal analyses and stomach content examinations were conducted for this purpose. Additionally, as a supplementary method for analyzing the dietary spectrum of raccoons, the parasite fauna was considered, as metazoan parasites, in particular, can serve as indicators for the species and origin of food organisms. While stomach content analyses allow for a detailed recording of trophic relationships solely at the time of sampling, parasitological examinations enable inferences about more distant interaction processes. With their different developmental stages and heteroxenous life cycles involving specific, sometimes obligate, intermediate hosts, they utilize the food web to reach their definitive host. The results of this study clearly demonstrate that spawning areas of amphibians and reptiles were predominantly utilized as food resources by raccoons in the study areas. Thus, common toad (Bufo bufo), common newt (Lissotriton vulgaris), grass frog (Rana temporaria), and grass snake (Natrix natrix) were identified as food organisms for raccoons. The detection of the parasite species Euryhelmis squamula, Isthmiophora melis, and Physocephalus sexalatus with partially high infestation rates also suggests that both amphibians and reptiles belong to the established dietary components of raccoons from an ecological perspective, as amphibians and reptiles are obligate intermediate hosts in the respective parasitic life cycles of the detected parasites. The study clearly demonstrates that raccoons have a significant impact on occurrence-sensitive animal species in certain areas and, as an invasive species, can exert a negative influence on native species and ecosystems.
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Affiliation(s)
- Norbert Peter
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Anna V. Schantz
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Dorian D. Dörge
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Anne Steinhoff
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Sarah Cunze
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Ajdin Skaljic
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
| | - Sven Klimpel
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt/Main, D-60439, Germany
- Senckenberg Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, Senckenberganlage 25, Frankfurt/Main, D-60325, Germany
- LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Senckenberganlage 25, D-60325, Frankfurt/Main, Germany
- Branch Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Ohlebergsweg 12, 35392, Giessen, Germany
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Rowley JJL, Symons A, Doyle C, Hall J, Rose K, Stapp L, Lettoof DC. Broad-scale pesticide screening finds anticoagulant rodenticide and legacy pesticides in Australian frogs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172526. [PMID: 38636866 DOI: 10.1016/j.scitotenv.2024.172526] [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: 12/17/2023] [Revised: 03/20/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
Pesticide contamination poses a significant threat to non-target wildlife, including amphibians, many of which are already highly threatened. This study assessed the extent of pesticide exposure in dead frogs collected during a mass mortality event across eastern New South Wales, Australia between July 2021 and March 2022. Liver tissue from 77 individual frogs of six species were analysed for >600 legacy and contemporary pesticides, including rodenticides. More than a third (36 %) of the liver samples contained at least one of the following pesticides: brodifacoum, dieldrin, DDE, heptachlor/heptachlor epoxide, fipronil sulfone, and 2-methyl-4-chlorophenoxyacetic acid (MCPA). Brodifacoum, a second-generation anticoagulant rodenticide, was found in four of the six frog species analysed: the eastern banjo frog (Limnodynastes dumerilii), cane toad (Rhinella marina), green tree frog (Litoria caerulea) and Peron's tree frog (Litoria peronii). This is the first report of anticoagulant rodenticide detected in wild amphibians, raising concerns about potential impacts on frogs and extending the list of taxa shown to accumulate rodenticides. Dieldrin, a banned legacy pesticide, was also detected in two species: striped marsh frog (Limnodynastes peronii) and green tree frog (Litoria caerulea). The toxicological effects of these pesticides on frogs are difficult to infer due to limited comparable studies; however, due to the low frequency of detection the presence of these pesticides was not considered a major contributing factor to the mass mortality event. Additional research is needed to investigate the effects of pesticide exposure on amphibians, particularly regarding the impacts of second-generation anticoagulant rodenticides. There is also need for continued monitoring and improved conservation management strategies for the mitigation of the potential threat of pesticide exposure and accumulation in amphibian populations.
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Affiliation(s)
- Jodi J L Rowley
- Australian Museum Research Institute, Australian Museum, 1 William Street, Sydney, New South Wales 2010, Australia; Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences (BEES), University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Andrew Symons
- New South Wales Department of Climate Change, Energy, the Environment and Water, Environment Protection Science Branch, 480 Weeroona Road, Lidcombe, New South Wales 2141, Australia
| | - Christopher Doyle
- New South Wales Department of Climate Change, Energy, the Environment and Water, Environment Protection Science Branch, 480 Weeroona Road, Lidcombe, New South Wales 2141, Australia
| | - Jane Hall
- Australian Registry of Wildlife Health, Taronga Conservation Society Australia, Bradley's Head Road, Mosman, NSW 2088, Australia
| | - Karrie Rose
- Australian Registry of Wildlife Health, Taronga Conservation Society Australia, Bradley's Head Road, Mosman, NSW 2088, Australia
| | - Laura Stapp
- New South Wales Department of Climate Change, Energy, the Environment and Water, Environment Protection Science Branch, 480 Weeroona Road, Lidcombe, New South Wales 2141, Australia
| | - Damian C Lettoof
- Environment, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Centre for Environment and Life Sciences, Floreat, Western Australia 6014, Australia; School of Molecular and Life Sciences, Curtin University, Brand Drive, Bentley, Western Australia 6102, Australia
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Anderson D, Cervantez O, Bucciarelli GM, Lambert MR, Friesen MR. Feral frogs, native newts, and chemical cues: identifying threats from and management opportunities for invasive African Clawed Frogs in Washington state. PeerJ 2024; 12:e17307. [PMID: 38742097 PMCID: PMC11090105 DOI: 10.7717/peerj.17307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/05/2024] [Indexed: 05/16/2024] Open
Abstract
Invasive species threaten biodiversity globally. Amphibians are one of the most threatened vertebrate taxa and are particularly sensitive to invasive species, including other amphibians. African clawed frogs (Xenopus laevis) are native to Southern Africa but have subsequently become invasive on multiple continents-including multiple parts of North America-due to releases from the pet and biomedical trades. Despite their prevalence as a global invader, the impact of X. laevis remains understudied. This includes the Pacific Northwest of the USA, which now hosts multiple expanding X. laevis populations. For many amphibians, chemical cues communicate important information, including the presence of predators. Here, we tested the role chemical cues may play in mediating interactions between feral X. laevis and native amphibians in the Pacific Northwest. We tested whether native red-legged frog (Rana aurora) tadpoles display an antipredator response to non-native frog (X. laevis) or native newt (rough-skinned newts, Taricha granulosa) predator chemical stimuli. We found that R. aurora tadpoles exhibited pronounced anti-predator responses when exposed to chemical cues from T. granulosa but did not display anti-predator response to invasive X. laevis chemical cues. We also began experimentally testing whether T. granulosa-which produce a powerful neurotoxin tetrodotoxin (TTX)-may elicit an anti-predator response in X. laevis, that could serve to deter co-occupation. However, our short-duration experiments found that X. laevis were attracted to newt chemical stimuli rather than deterred. Our findings show that X. laevis likely poses a threat to native amphibians, and that these native species may also be particularly vulnerable to this invasive predator, compared to native predators, because toxic native newts may not limit X. laevis invasions. Our research provides some of the first indications that native Pacific Northwest species may be threatened by feral X. laevis and provides a foundation for future experiments testing potential management techniques for X. laevis.
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Affiliation(s)
- David Anderson
- Department of Biology, Saint Martin’s University, Lacey, WA, USA
| | - Olivia Cervantez
- Department of Biology, Saint Martin’s University, Lacey, WA, USA
| | - Gary M. Bucciarelli
- Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, CA, United States of America
| | - Max R. Lambert
- Science Division, Washington Department of Fish and Wildlife, Olympia, WA, USA
| | - Megan R. Friesen
- Department of Biology, Saint Martin’s University, Lacey, WA, USA
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García FA, Fuentes TF, Alonso IP, Bosch RA, Brunetti AE, Lopes NP. A Comprehensive Review of Patented Antimicrobial Peptides from Amphibian Anurans. JOURNAL OF NATURAL PRODUCTS 2024; 87:600-616. [PMID: 38412091 DOI: 10.1021/acs.jnatprod.3c01040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Since the 1980s, studies of antimicrobial peptides (AMPs) derived from anuran skin secretions have unveiled remarkable structural diversity and a wide range of activities. This study explores the potential of these peptides for drug development by examining granted patents, amino acid modifications related to patented peptides, and recent amphibians' taxonomic updates influencing AMP names. A total of 188 granted patents related to different anuran peptides were found, with Asia and North America being the predominant regions, contributing 65.4% and 15.4%, respectively. Conversely, although the Neotropical region is the world's most diversified region for amphibians, it holds only 3.7% of the identified patents. The antimicrobial activities of the peptides are claimed in 118 of these 188 patents. Additionally, for 160 of these peptides, 66 patents were registered for the natural sequence, 69 for both natural and derivative sequences, and 20 exclusively for sequence derivatives. Notably, common modifications include alterations in the side chains of amino acids and modifications to the peptides' N- and C-termini. This review underscores the biomedical potential of anuran-derived AMPs, emphasizing the need to bridge the gap between AMP description and practical drug development while highlighting the urgency of biodiversity conservation to facilitate biomedical discoveries.
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Affiliation(s)
- Fabiola Almeida García
- NPPNS, Department of Biomolecular Sciences, Faculty of Pharmaceutical Sciences of Ribeirão Preto, Department of Physics and Chemistry, University of São Paulo, Avenida do Café, s/no, 14040-903 Ribeirão Preto, Brazil
| | - Talia Frómeta Fuentes
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 Street No. 455, Vedado 10400, Cuba
| | - Isel Pascual Alonso
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 Street No. 455, Vedado 10400, Cuba
| | - Roberto Alonso Bosch
- Natural History Museum Felipe Poey, Faculty of Biology, University of Havana, Vedado 10400, Cuba
| | - Andrés E Brunetti
- Institute of Subtropical Biology (CONICET-UNAM), National University of Misiones, Posadas N3300LQH, Argentina
- Department of Insect Symbiosis, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Norberto Peporine Lopes
- NPPNS, Department of Biomolecular Sciences, Faculty of Pharmaceutical Sciences of Ribeirão Preto, Department of Physics and Chemistry, University of São Paulo, Avenida do Café, s/no, 14040-903 Ribeirão Preto, Brazil
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Riascos-Flores LR, Bonilla J, Naranjo-Briceño L, Apunte-Ramos K, Reyes-Ortega GC, Cabrera M, Cáceres-Andrade JF, Carrera-Gonzalez A, Yánez-Galarza JK, Siavichay Pesántez F, Oyagata-Cachimuel LA, Goethals P, Celi J, Van der Heyden C, Ortega-Andrade HM. Field-based molecular detection of Batrachochytrium dendrobatidis in critically endangered Atelopus toads and aquatic habitats in Ecuador. PLoS One 2024; 19:e0299246. [PMID: 38484016 PMCID: PMC10939218 DOI: 10.1371/journal.pone.0299246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 02/06/2024] [Indexed: 03/17/2024] Open
Abstract
Batrachochytrium dendrobatidis (Bd) is a lethal fungal species that parasitizes vertebrates and is associated with the worldwide decline of amphibian populations. The development of sensitive, rapid detection methods, particularly DNA-based techniques, is critical for effective management strategies. This study evaluates the efficacy of DNA extraction and a portable PCR device in a mountable field laboratory setup for detecting Bd near the habitats of three critically endangered Atelopus toad species in Ecuador. We collected skin swabs from Atelopus balios, A. nanay, and A. bomolochos, and environmental DNA (eDNA) samples from streams in Andean and coastal regions of Ecuador. For eDNA, a comparison was made with duplicates of the samples that were processed in the field and in a standard university laboratory. Our findings revealed Bd detection in eDNA and swabs from 6 of 12 water samples and 10 of 12 amphibian swab samples. The eDNA results obtained in the field laboratory were concordant with those obtained under campus laboratory conditions. These findings highlight the potential of field DNA-based monitoring techniques for detecting Bd in amphibian populations and their aquatic habitats, particularly in remote areas. Furthermore, this research aligns with the National Action Plan for the Conservation of Ecuadorian Amphibians and contributes to the global effort to control this invasive and deadly fungus.
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Affiliation(s)
- Lenin R. Riascos-Flores
- Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Gent University, Gent, Belgium
- Escuela Superior Politécnica del Litoral, ESPOL/Facultad de Ciencias de la Vida, Centro de Investigaciones Biotecnológicas del Ecuador, Campus Gustavo Galindo Guayaquil, Guayaquil, Ecuador
| | - Julio Bonilla
- Escuela Superior Politécnica del Litoral, ESPOL/Facultad de Ciencias de la Vida, Centro de Investigaciones Biotecnológicas del Ecuador, Campus Gustavo Galindo Guayaquil, Guayaquil, Ecuador
| | - Leopoldo Naranjo-Briceño
- Applied Microbiology Research Group, Life Sciences Faculty, Universidad Regional Amazónica IKIAM, Tena, Ecuador
- Fungal Biotech Lab, Spora Biotech, Huechuraba, Santiago, Región Metropolitana, Chile
| | - Katherine Apunte-Ramos
- Molecular Biology and Biochemistry Lab, Universidad Regional Amazónica IKIAM, Tena, Ecuador
| | - Grace C. Reyes-Ortega
- Biogeography and Spatial Ecology Research Group, Life Sciences Faculty, Universidad Regional Amazónica IKIAM, Tena, Ecuador
| | - Marcela Cabrera
- Laboratorio Nacional de Referencia del Agua, Universidad Regional Amazónica Ikiam, Tena, Ecuador
- University of Valencia, Paterna, Spain
| | | | | | - Jomira K. Yánez-Galarza
- Applied Microbiology Research Group, Life Sciences Faculty, Universidad Regional Amazónica IKIAM, Tena, Ecuador
- Biogeography and Spatial Ecology Research Group, Life Sciences Faculty, Universidad Regional Amazónica IKIAM, Tena, Ecuador
| | | | | | - Peter Goethals
- Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Gent University, Gent, Belgium
| | - Jorge Celi
- Water and Aquatic Resources Research Group, School of Earth and Water Sciences, Universidad Regional Amazónica Ikiam, Tena, Ecuador
| | - Christine Van der Heyden
- Department of Biosciences and Industrial Technology, Health and Water Technology Research Centre, HOGENT—University of Applied Sciences and Arts, Gent, Belgium
| | - H. Mauricio Ortega-Andrade
- Biogeography and Spatial Ecology Research Group, Life Sciences Faculty, Universidad Regional Amazónica IKIAM, Tena, Ecuador
- Herpetology Division, Instituto Nacional de Biodiversidad, Quito, Pichincha, Ecuador
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Rahman MM, Yun J, Lee K, Lee SH, Park SM, Ham CH, Sung HC. Population-level call properties of endangered Dryophytes suweonensissensu lato (Anura: Amphibia) in South Korea. PeerJ 2023; 11:e16492. [PMID: 38054023 PMCID: PMC10695108 DOI: 10.7717/peerj.16492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/30/2023] [Indexed: 12/07/2023] Open
Abstract
Calling is one of the unique amphibian characteristics that facilitates social communication and shows individuality; however, it also makes them vulnerable to predators. Researchers use amphibian call properties to study their population status, ecology, and behavior. This research scope has recently broadened to species identification and taxonomy. Dryophytes flaviventris has been separated from the endangered anuran species, D. suweonensis, based on small variations in genetic, morphometric, and temporal call properties observed in South Korea. The Chilgap Mountain (CM) was considered as the potential geographic barrier for the speciation. However, it initiated taxonomic debates as CM has been hardly used and is considered a potential barrier for other species. The calls of populations from both sides are also apparently similar. Thus, to verify the differences in call properties among populations of D. suweonensis sensu lato (s.l.; both of the species), we sampled and analyzed call data from five localities covering its distribution range, including the southern (S) and northern (N) parts of CM. We found significant differences in many call properties among populations; however, no specific pattern was observed. Some geographically close populations, such as Iksan (S), Wanju (S), and Gunsan (S), had significant differences, whereas many distant populations, such as Pyeongtaek (N) and Wanju (S), had no significant differences. Considering the goal of this study was only to observe the call properties, we cautiously conclude that the differences are at the population level rather than the species level. Our study indicates the necessity of further investigation into the specific status of D. flaviventris using robust integrated taxonomic approaches, including genetic and morphological parameters from a broader array of localities.
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Affiliation(s)
- Md Mizanur Rahman
- Department of Biological Sciences, Chonnam National University, Gwangju, South Korea
| | - Jiyoung Yun
- Department of Biological Sciences and Biotechnology, Chonnam National University, Gwangju, South Korea
| | - KaHyun Lee
- Department of Biological Sciences and Biotechnology, Chonnam National University, Gwangju, South Korea
| | - Seung-Ha Lee
- Department of Biological Sciences, Chonnam National University, Gwangju, South Korea
| | - Seung-Min Park
- Department of Biological Sciences and Biotechnology, Chonnam National University, Gwangju, South Korea
| | - Choong-Ho Ham
- Department of Biological Sciences and Biotechnology, Chonnam National University, Gwangju, South Korea
| | - Ha-Cheol Sung
- Department of Biological Sciences, Chonnam National University, Gwangju, South Korea
- Research Center of Ecomimetics, Chonnam National University, Gwangju, Republic of Korea
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8
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Tsukada E, Rodrigues CC, Jacintho JC, Franco-Belussi L, Jones-Costa M, Abdalla FC, Rocha TL, Salla RF. The amphibian's spleen as a source of biomarkers for ecotoxicity assessment: Historical review and trends. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:165915. [PMID: 37532037 DOI: 10.1016/j.scitotenv.2023.165915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/04/2023]
Abstract
Amphibians are very sensitive to many environmental changes, so these animals are considered good bioindicator models for ecotoxicology. Given the importance of the amphibian spleen for hematopoietic and immune responses, this can be a key organ for the evaluation of biomarkers to monitor the health of individuals in nature or in captivity. In this systematic review, we searched databases and summarized the main findings concerning the amphibian spleen as a source of possible biomarkers applied in different scientific fields. The searches resulted in 83 articles published from 1923 to 2022, which applied the use of splenic samples to evaluate the effects of distinct stressors on amphibians. Articles were distributed in more than twenty countries, with USA, Europe, and Brazil, standing out among them. Publications focused mainly on anatomical and histomorphological characterization of the spleen, its physiology, and development. Recently, the use of splenic biomarkers in pathology and ecotoxicology began to grow but many gaps still need to be addressed in herpetological research. About 85 % of the splenic biomarkers showed responses to various stressors, which indicates that the spleen can provide numerous biomarkers to be used in many study fields. The limited amount of information on morphological description and splenic anatomy in amphibians may be a contributing factor to the underestimated use of splenic biomarkers in herpetological research around the world. We hope that this unprecedented review can instigate researchers to refine herpetological experimentation, using the spleen as a versatile and alternative source for biomarkers in ecotoxicology.
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Affiliation(s)
- Elisabete Tsukada
- Post-graduation Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos (UFSCar), campus Sorocaba, Sorocaba, São Paulo, Brazil
| | - Cândido C Rodrigues
- Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - Jaqueline C Jacintho
- Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - Lilian Franco-Belussi
- Departament of Biological Sciences, São Paulo State University, campus São José do Rio Preto, São Paulo, Brazil; Laboratory of Experimental Pathology (LAPex), Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Monica Jones-Costa
- Department of Biology, Federal University of São Carlos (UFSCar), campus Sorocaba, Sorocaba, São Paulo, Brazil
| | - Fábio Camargo Abdalla
- Post-graduation Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos (UFSCar), campus Sorocaba, Sorocaba, São Paulo, Brazil; Laboratory of Structural and Functional Biology, Federal University of São Carlos (UFSCar), campus Sorocaba, Sorocaba, São Paulo, Brazil
| | - Thiago Lopes Rocha
- Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - Raquel F Salla
- Post-graduation Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos (UFSCar), campus Sorocaba, Sorocaba, São Paulo, Brazil; Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil.
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9
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Assis VR, Robert J, Titon SCM. Introduction to the special issue Amphibian immunity: stress, disease and ecoimmunology. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220117. [PMID: 37305915 PMCID: PMC10258669 DOI: 10.1098/rstb.2022.0117] [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: 05/01/2023] [Accepted: 05/02/2023] [Indexed: 06/13/2023] Open
Abstract
Amphibian populations have been declining worldwide, with global climate changes and infectious diseases being among the primary causes of this scenario. Infectious diseases are among the primary drivers of amphibian declines, including ranavirosis and chytridiomycosis, which have gained more attention lately. While some amphibian populations are led to extinction, others are disease-resistant. Although the host's immune system plays a major role in disease resistance, little is known about the immune mechanisms underlying amphibian disease resistance and host-pathogen interactions. As ectotherms, amphibians are directly subjected to changes in temperature and rainfall, which modulate stress-related physiology, including immunity and pathogen physiology associated with diseases. In this sense, the contexts of stress, disease and ecoimmunology are essential for a better understanding of amphibian immunity. This issue brings details about the ontogeny of the amphibian immune system, including crucial aspects of innate and adaptive immunity and how ontogeny can influence amphibian disease resistance. In addition, the papers in the issue demonstrate an integrated view of the amphibian immune system associated with the influence of stress on immune-endocrine interactions. The collective body of research presented herein can provide valuable insights into the mechanisms underlying disease outcomes in natural populations, particularly in the context of changing environmental conditions. These findings may ultimately enhance our ability to forecast effective conservation strategies for amphibian populations. This article is part of the theme issue 'Amphibian immunity: stress, disease and ecoimmunology'.
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Affiliation(s)
- Vania Regina Assis
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, 05508-900 São Paulo, Brazil
- College of Public Health, University of South Florida, Tampa, FL 33612-9415, USA
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY 14642, USA
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Terblanche N, Measey J. The conservation value of freshwater habitats for frog communities of lowland fynbos. PeerJ 2023; 11:e15516. [PMID: 37304861 PMCID: PMC10249618 DOI: 10.7717/peerj.15516] [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: 11/17/2022] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Abstract
Amphibians are more threatened than any other vertebrate class, yet evidence for many threats is missing. The Cape lowland fynbos (endemic scrub biome) is threatened by habitat loss, and natural temporary freshwater habitats are removed in favour of permanent impoundments. In this study, we determine amphibian assemblages across different freshwater habitat types with special attention to the presence of invasive fish. We find that anuran communities differ primarily by habitat type, with permanent water habitats having more widespread taxa, while temporary water bodies have more range restricted taxa. Invasive fish are found to have a significant impact on frogs with toads most tolerant of their presence. Temporary freshwater habitats are a conservation priority in the area, and their amphibian assemblages represent endemic taxa that are intolerant of invasive fish. Conservation of a biodiverse amphibian assemblage in lowland fynbos areas will rely on the creation of temporary freshwater habitats, rather than a northern hemisphere pond based solution.
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Affiliation(s)
- Naas Terblanche
- Riverglade Retirement Village, Parklands, Unaffiliated, Cape Town, South Africa
| | - John Measey
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Stellenbosch, South Africa
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11
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Alagador D. Effective conservation planning of Iberian amphibians based on a regionalization of climate-driven range shifts. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2023; 37:e14026. [PMID: 36317717 DOI: 10.1111/cobi.14026] [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: 06/01/2022] [Revised: 08/11/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Amphibians are severely affected by climate change, particularly in regions where droughts prevail and water availability is scarce. The extirpation of amphibians triggers cascading effects that disrupt the trophic structure of food webs and ecosystems. Dedicated assessments of the spatial adaptive potential of amphibian species under climate change are, therefore, essential to provide guidelines for their effective conservation. I used predictions about the location of suitable climates for 27 amphibian species in the Iberian Peninsula from a baseline period to 2080 to typify shifting species' ranges. The time at which these range types are expected to be functionally important for the adaptation of a species was used to identify full or partial refugia; areas most likely to be the home of populations moving into new climatically suitable grounds; areas most likely to receive populations after climate adaptive dispersal; and climatically unsuitable areas near suitable areas. I implemented an area prioritization protocol for each species to obtain a cohesive set of areas that would provide maximum adaptability and where management interventions should be prioritized. A connectivity assessment pinpointed where facilitative strategies would be most effective. Each of the 27 species had distinct spatial requirements but, common to all species, a bottleneck effect was predicted by 2050 because source areas for subsequent dispersal were small in extent. Three species emerged as difficult to maintain up to 2080. The Iberian northwest was predicted to capture adaptive range for most species. My study offers analytical guidelines for managers and decision makers to undertake systematic assessments on where and when to intervene to maximize the persistence of amphibian species and the functionality of the ecosystems that depend on them.
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Affiliation(s)
- Diogo Alagador
- The Biodiversity Chair, Institute for Advanced Studies and Research, Universidade de Évora, Évora, Portugal
- MED - Mediterranean Institute for Agriculture, Environment and Development, CHANGE - Global Change and Sustainability Institute, Universidade de Évora, Évora, Portugal
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12
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Peter N, Dörge DD, Cunze S, Schantz AV, Skaljic A, Rueckert S, Klimpel S. Raccoons contraband - The metazoan parasite fauna of free-ranging raccoons in central Europe. Int J Parasitol Parasites Wildl 2023; 20:79-88. [PMID: 36688078 PMCID: PMC9852791 DOI: 10.1016/j.ijppaw.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 01/14/2023]
Abstract
The invasive raccoon (Procyon lotor) is an abundant carnivore and considered as an important potential vector of infectious diseases and parasites in Europe. Raccoons show a broad, opportunistic, omnivorous food spectrum. Food supply and habitat quality in urban areas are very attractive for the generalist raccoon. This inevitably leads to increased interaction with humans, domestic animals and livestock, making the raccoon a potentially suitable zoonosis vector. In its autochthonous range, especially in the Eastern and Midwestern United States, the raccoon has been studied very intensively since the beginning of the 20th century. Whereas, basic field biology and parasitology studies in Germany and Europe are lacking and have only been conducted sporadically, regionally and on small sample sizes. In the presented study 234 raccoons from central Germany were comprehensively examined for their metazoan parasite fauna. The present study shows for the first time an extremely diverse parasite fauna in raccoons outside their native range and proves their essential role as intermediate hosts and hosts for ecto- and endoparasites. A total of 23 different parasite species were identified, five of which are human pathogens, 14 of which are new for the parasite fauna of raccoons in Europe. The human pathogenic raccoon roundworm Baylisascaris procyonis is the most common parasite species in this study, with a prevalence of up to 95%. The digenetic trematode Plagiorchis muris, another human pathogenic parasite species, was detected for the first time in raccoons. The ongoing spread of invasive carnivores and the associated spread and transmission of their parasites and other pathogens increases the potential health risk of wild and farmed animals as well as humans. An increase in parasitic diseases in humans (e.g. raccoon roundworm) is to be expected, especially in urban areas, where raccoons are becoming more and more abundant.
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Affiliation(s)
- Norbert Peter
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany
| | - Dorian D. Dörge
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany
| | - Sarah Cunze
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany
| | - Anna V. Schantz
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany
| | - Ajdin Skaljic
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany
| | - Sonja Rueckert
- School of Applied Sciences and Center for Conservation and Restoration Science, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, EH11 1HX, UK
| | - Sven Klimpel
- Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60438, Germany,Senckenberg Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, Senckenberganlage 25, Frankfurt, Main, D-60325, Germany,LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Senckenberganlage 25, D-60325, Frankfurt, Main, Germany,Corresponding author. Institute for Ecology, Evolution and Diversity, Goethe-University, Max-von-Laue-Str. 13, Frankfurt, Main, D-60439, Germany.
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13
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Wei P, Chen J, Duan Y, Song Y, Wang Z, Yuan Z. More accurate, consistent, and reliable data for amphibian species are needed from China's nature reserves. CONSERVATION SCIENCE AND PRACTICE 2022. [DOI: 10.1111/csp2.12872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Pingfan Wei
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences Southwest University Chongqing China
- Key Laboratory for Conserving Wildlife with Small Populations in Yunnan Southwest Forestry University Kunming China
| | - Jinmin Chen
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources College of Life Sciences Normal University Wuhu China
| | - Yubao Duan
- Key Laboratory for Conserving Wildlife with Small Populations in Yunnan Southwest Forestry University Kunming China
| | - Yanfang Song
- Key Laboratory for Conserving Wildlife with Small Populations in Yunnan Southwest Forestry University Kunming China
| | - Zhijian Wang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences Southwest University Chongqing China
| | - Zhiyong Yuan
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences Southwest University Chongqing China
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14
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Castro Monzon F, Rödel MO, Ruland F, Parra-Olea G, Jeschke JM. Batrachochytrium salamandrivorans' Amphibian Host Species and Invasion Range. ECOHEALTH 2022; 19:475-486. [PMID: 36611108 PMCID: PMC9898388 DOI: 10.1007/s10393-022-01620-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 08/31/2022] [Indexed: 06/17/2023]
Abstract
Batrachochytrium salamandrivorans (Bsal), a species related to the destructive pathogen Batrachochytrium dendrobatidis (Bd), was found and identified in Europe in 2013. Now, a decade later, a large amount of information is available. This includes data from studies in the field, reports of infection in captive amphibians, laboratory studies testing host susceptibility, and data from prospective studies that test for Bsal's presence in a location. We conducted a systematic review of the published literature and compiled a dataset of Bsal tests. We identified 67 species that have been reported positive for Bsal, 20 of which have a threatened conservation status. The distribution of species that have been found with infection encompasses 69 countries, highlighting the potential threat that Bsal poses. We point out where surveillance to detect Bsal have taken place and highlight areas that have not been well monitored. The large number of host species belonging to the families Plethodontidae and Salamandridae suggests a taxonomic pattern of susceptibility. Our results provide insight into the risk posed by Bsal and identifies vulnerable species and areas where surveillance is needed to fill existing knowledge gaps.
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Affiliation(s)
- Federico Castro Monzon
- Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 1-3, 14195, Berlin, Germany.
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587, Berlin, Germany.
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, Altensteinstr. 34, 14195, Berlin, Germany.
- Department of Zoology, Institute of Biology, Universidad Nacional Autonoma de Mexico, AP 70-153, 04510, Mexico City, Mexico.
| | - Mark-Oliver Rödel
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, Altensteinstr. 34, 14195, Berlin, Germany
- Museum für Naturkunde-Leibniz Institute for Evolution and Biodiversity Science, Invalidenstr. 43, 10115, Berlin, Germany
| | - Florian Ruland
- Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 1-3, 14195, Berlin, Germany
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, Altensteinstr. 34, 14195, Berlin, Germany
| | - Gabriela Parra-Olea
- Department of Zoology, Institute of Biology, Universidad Nacional Autonoma de Mexico, AP 70-153, 04510, Mexico City, Mexico
| | - Jonathan M Jeschke
- Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 1-3, 14195, Berlin, Germany
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, Altensteinstr. 34, 14195, Berlin, Germany
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15
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Patterns of Performance Variation Between Animal Hybrids and their Parents: A Meta-analysis. Evol Biol 2022. [DOI: 10.1007/s11692-022-09585-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractHybridization is a widespread phenomenon in animals, and hybrid heterosis/breakdown could be key processes determining the evolutionary dynamics of hybrids. Indeed, hybrids are not consistently disadvantaged compared to the parental lineages, as was historically assumed. Multiple processes could lead to performance differences between parental lineages and their hybrids. Despite many studies evaluated the performance of hybrids, a quantitative synthesis is required to assess the general pattern. Here we used meta-analytic and meta-regression approaches to quantify the fitness differences between parental lineages and their hybrids, and to identify possible processes that could lead to these differences. Specifically, we tested biological and methodological parameters that could determine differences in performance between hybrids and parental lineages. Hybrid performance was extremely variable across studies, being often significantly higher or lower compared to the mean performance of their parents. Nevertheless, the averaged hybrid performance was similar to the fitness of parental lineages, with differences across studies related to how performance was assessed. Genetic divergence between parental lineages, and the approach used to identify hybrids were the parameters most strongly related to variation in hybrid performance. Performance was lower for hybrids between distantly related lineages. Furthermore, study settings and the use of imprecise approaches for hybrid identification (e.g. morphology-based) can bias assessments of performance. Studies performed on wild populations and using genetic approaches for hybrid identification detected more often a decreased hybrid performance, compared to laboratory studies. We highlight the importance of appropriate settings for a realistic understanding of the evolutionary impacts of hybridization.
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16
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Alonso A, Monroy S, Bosch J, Pérez J, Boyero L. Amphibian loss alters periphyton structure and invertebrate growth in montane streams. J Anim Ecol 2022; 91:2329-2337. [PMID: 36177539 PMCID: PMC9828351 DOI: 10.1111/1365-2656.13818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/23/2022] [Indexed: 01/12/2023]
Abstract
Amphibians are declining worldwide due to a combination of stressors such as climate change, invasive species, habitat loss, pollution and emergent diseases. Although their losses are likely to have important ecological consequences on the structure and functioning of freshwater ecosystems, this issue has been scarcely explored. We conducted an experiment in three montane streams-where primary production is the main source of energy and carbon-to assess the effects of amphibian disappearance (i.e. presence or absence of the common midwife toad Alytes obstetricans, a common species found in pools of these streams) on several aspects of ecosystem functioning and structure: periphyton biomass and chlorophyll a concentration, algal assemblage structure, and growth of macroinvertebrate grazers. We compared four types of experimental enclosures: (i) without macroinvertebrates or amphibians; (ii) with larvae of the caddisfly Allogamus laureatus; (iii) with A. obstetricans tadpoles; and (iv) with both A. laureatus larvae and A. obstetricans tadpoles. The absence of tadpoles increased periphyton biomass, but did not cause differences on inorganic sediment accrual. The algal assemblage had a higher diversity in the absence of tadpoles, and their characteristic taxa differed from the assemblages in presence of tadpoles. A. laureatus presented higher mass in presence of tadpoles; however, tadpole length was not affected by presence of macroinvertebrates. Our results suggest that presence of tadpoles is a driver of periphyton accrual and assemblage structure, acting as top-down control and with key potential consequences on the functioning of montane stream ecosystems.
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Affiliation(s)
- Alberto Alonso
- Department of Plant Biology and Ecology, Faculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)LeioaSpain
| | - Silvia Monroy
- Department of Plant Biology and Ecology, Faculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)LeioaSpain
| | - Jaime Bosch
- IMIB‐Research Unit of Biodiversity (CSIC, UO, PA)Oviedo University‐Campus MieresMieresSpain,Centro de Investigación, Seguimiento y Evaluación, Parque Nacional de la Sierra de GuadarramaRascafríaSpain
| | - Javier Pérez
- Department of Plant Biology and Ecology, Faculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)LeioaSpain
| | - Luz Boyero
- Department of Plant Biology and Ecology, Faculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)LeioaSpain,IKERBASQUE, Basque Foundation for ScienceBilbaoSpain
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17
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LaFond J, Martin KR, Dahn H, Richmond JQ, Murphy RW, Rollinson N, Savage AE. Invasive Bullfrogs Maintain MHC Polymorphism Including Alleles Associated with Chytrid Fungal Infection. Integr Comp Biol 2022; 62:262-274. [PMID: 35588059 DOI: 10.1093/icb/icac044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/19/2022] [Accepted: 05/16/2022] [Indexed: 11/14/2022] Open
Abstract
Maintenance of genetic diversity at adaptive loci may facilitate invasions by non-native species by allowing populations to adapt to novel environments, despite the loss of diversity at neutral loci that typically occurs during founder events. To evaluate this prediction, we compared genetic diversity at major histocompatibility complex (MHC) and cytochrome b (cytb) loci from 20 populations of the American bullfrog (Rana catesbeiana) across theinvasive and native ranges in North America and quantified the presence of the pathogen Batrachochytrium dendrobatidis (Bd). Compared to native populations, invasive populations had significantly higher Bd prevalence and intensity, significantly higher pairwise MHC and cytb FST, and significantly lower cytb diversity, but maintained similar levels of MHC diversity. The two most common MHC alleles (LiCA_B and Rapi_33) were associated with a significant decreased risk of Bd infection, and we detected positive selection acting on four peptide binding residues. Phylogenetic analysis suggested invasive populations likely arose from a single founding population in the American Midwest with a possible subsequent invasion in the northwest. Overall, our study suggests that the maintenance of diversity at adaptive loci may contribute to invasion success and highlights the importance of quantifying diversity at functional loci to assess the evolutionary potential of invasive populations.
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Affiliation(s)
- Jacob LaFond
- Department of Biology, University of Central Florida, Orlando, FL 32816, USA
- Department of Biology, University of Tampa, Tampa, FL 33606, USA
| | - Katherine R Martin
- Department of Biology, University of Central Florida, Orlando, FL 32816, USA
| | - Hollis Dahn
- Department of Biology, University of Toronto, Toronto, ON, Canada
| | - Jonathan Q Richmond
- U.S. Geological Survey, 4165 Spruance Rd. Suite 200, San Diego, CA 92101, USA
| | - Robert W Murphy
- Department of Biology, University of Toronto, Toronto, ON, Canada
| | - Njal Rollinson
- Department of Biology, University of Toronto, Toronto, ON, Canada
| | - Anna E Savage
- Department of Biology, University of Central Florida, Orlando, FL 32816, USA
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18
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Hinneberg H, Bamann T, Geue JC, Foerster K, Thomassen HA, Kupfer A. Truly invasive or simply non‐native? Insights from an artificial crested newt hybrid zone. CONSERVATION SCIENCE AND PRACTICE 2022. [DOI: 10.1111/csp2.12752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Heiko Hinneberg
- University of Applied Forest Sciences Rottenburg Germany
- University of Tübingen, Institute of Evolution and Ecology Tübingen Germany
| | | | - Julia C. Geue
- Umeå University, Department of Ecology and Environmental Sciences Umeå Sweden
| | - Katharina Foerster
- University of Tübingen, Institute of Evolution and Ecology Tübingen Germany
| | - Henri A. Thomassen
- University of Tübingen, Institute of Evolution and Ecology Tübingen Germany
| | - Alexander Kupfer
- Department of Zoology, State Museum of Natural History Stuttgart Stuttgart Germany
- Institute of Biology, University of Hohenheim Stuttgart Germany
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19
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Denoël M, Duret C, Lorrain-Soligon L, Padilla P, Pavis J, Pille F, Tendron P, Ficetola GF, Falaschi M. High habitat invasibility unveils the invasiveness potential of water frogs. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02849-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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20
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Different time patterns of the presence of red-eared slider influence the ontogeny dynamics of common frog tadpoles. Sci Rep 2022; 12:7876. [PMID: 35552438 PMCID: PMC9098440 DOI: 10.1038/s41598-022-11561-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 04/20/2022] [Indexed: 11/09/2022] Open
Abstract
The coexistence of species in a given community depends on the set of species involved and the timing of their interactions. Many native communities are increasingly forced to face both direct and indirect pressures from new alien predators, which, in extreme cases, can lead to the extinction of prey populations. In this study, we examine the dynamics of the ontogeny of common frog (Rana temporaria) tadpoles under different time patterns of an alien predator-the red-eared slider (Trachemys scripta elegans) presence. We found that the tadpoles had a longer larval period and were smaller in size at metamorphosis and lower in body mass when the predator was present in early development than when the tadpoles developed without a predator. The early presence of a predator conspicuously reduced the growth increments of the tadpoles at early development. After the removal of the predator, growth accelerated above the level measured under the conditions of both the late predator and no predator. However, these growth rates did not exceed the growth rates of equally sized tadpoles in the other treatments and therefore were not sufficient to compensate for the growth slowdown in the first part of development. The presence of a predator in late tadpole development influenced neither the time to metamorphosis nor size/body mass at metamorphosis. In conclusion, the predator had the effect on metamorphosis traits only if it was present in the early development of tadpoles.
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21
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Bryant AR, Gabor CR, Swartz LK, Wagner R, Cochrane MM, Lowe WH. Differences in Corticosterone Release Rates of Larval Spring Salamanders ( Gyrinophilus porphyriticus) in Response to Native Fish Presence. BIOLOGY 2022; 11:484. [PMID: 35453684 PMCID: PMC9030379 DOI: 10.3390/biology11040484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/11/2022] [Accepted: 03/17/2022] [Indexed: 11/16/2022]
Abstract
Invasive fish predators are an important factor causing amphibian declines and may have direct and indirect effects on amphibian survival. For example, early non-lethal exposure to these stressors may reduce survival in later life stages, especially in biphasic species. In amphibians, the glucocorticoid hormone corticosterone is released by the hypothalamo-pituitary-interrenal axis (HPI), as an adaptive physiological response to environmental stressors. The corticosterone response (baseline and response to acute stressors) is highly flexible and context dependent, and this variation can allow individuals to alter their phenotype and behavior with environmental changes, ultimately increasing survival. We sampled larvae of the spring salamander (Gyrinophilus porphyriticus) from two streams that each contained predatory brook trout (Slavelinus fontinalis) in the lower reaches and no predatory brook trout in the upper reaches. We measured baseline and stress-induced corticosterone release rates of larvae from the lower and upper reaches using a non-invasive water-borne hormone assay. We hypothesized that corticosterone release rates would differ between larvae from fish-present reaches and larvae from fish-free reaches. We found that baseline and stressor-induced corticosterone release rates were downregulated in larvae from reaches with fish predators. These results indicate that individuals from reaches with predatory trout are responding to fish predators by downregulating corticosterone while maintaining an active HPI axis. This may allow larvae more time to grow before metamorphosing, while also allowing them to physiologically respond to novel stressors. However, prolonged downregulation of corticosterone release rates can impact growth in post-metamorphic individuals.
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Affiliation(s)
- Amanda R. Bryant
- Department of Biology, Texas State University, San Marcos, TX 78666, USA;
| | - Caitlin R. Gabor
- Department of Biology, Texas State University, San Marcos, TX 78666, USA;
| | | | - Ryan Wagner
- School of Environment and Natural Resources, The Ohio State University Columbus, Columbus, OH 43210, USA;
| | - Madaline M. Cochrane
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA; (M.M.C.); (W.H.L.)
| | - Winsor H. Lowe
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA; (M.M.C.); (W.H.L.)
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22
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Tasker BR, Honebein KN, Erickson AM, Misslin JE, Hurst P, Cooney S, Riley S, Griffith SA, Bancroft BA. Effects of elevated temperature, reduced hydroperiod, and invasive bullfrog larvae on pacific chorus frog larvae. PLoS One 2022; 17:e0265345. [PMID: 35290408 PMCID: PMC8923472 DOI: 10.1371/journal.pone.0265345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/28/2022] [Indexed: 11/20/2022] Open
Abstract
Climate change and invasive species threaten many ecosystems, including surface freshwater systems. Increasing temperatures and reduced hydroperiod due to climate change may promote the persistence of invasive species and facilitate new invasions due to potentially higher tolerance to environmental stress in successful invaders. Amphibians demonstrate high levels of plasticity in life history characteristics, particularly those species which inhabit both ephemeral and permanent water bodies. We tested the influence of two projected effects of climate change (increased temperature and reduced hydroperiod) on Pacific chorus frog (Pseudacris regilla) tadpoles alone and in combination with the presence of tadpoles of a wide-spread invasive amphibian, the American bullfrog (Lithobates catesbeianus). Specifically, we explored the effects of projected climate change and invasion on survival, growth, mass at stage 42, and development rate of Pacific chorus frogs. Direct and indirect interactions between the invasive tadpole and the native tadpole were controlled via a cage treatment and were included to account for differences in presence of the bullfrog compared to competition for food resources and other direct effects. Overall, bullfrogs had larger negative effects on Pacific chorus frogs than climate conditions. Under future climate conditions, Pacific chorus frogs developed faster and emerged heavier. Pacific chorus frog tadpoles developing in the presence of American bullfrogs, regardless of cage treatment, emerged lighter. When future climate conditions and presence of invasive American bullfrog tadpoles were combined, tadpoles grew less. However, no interaction was detected between climate conditions and bullfrog presence for mass, suggesting that tadpoles allocated energy towards mass rather than length under the combined stress treatment. The maintenance of overall body condition (smaller but heavier metamorphs) when future climate conditions overlap with bullfrog presence suggests that Pacific chorus frogs may be partially compensating for the negative effects of bullfrogs via increased allocation of energy towards mass. Strong plasticity, as demonstrated by Pacific chorus frog larvae in our study, may allow species to match the demands of new environments, including under future climate change.
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Affiliation(s)
- Bailey R. Tasker
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
- Department of Environmental Studies and Sciences, Gonzaga University, Spokane, Washington, United States of America
| | - Karli N. Honebein
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
- Department of Environmental Studies and Sciences, Gonzaga University, Spokane, Washington, United States of America
| | - Allie M. Erickson
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
- Department of Environmental Studies and Sciences, Gonzaga University, Spokane, Washington, United States of America
| | - Julia E. Misslin
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
| | - Paul Hurst
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
- Department of Environmental Studies and Sciences, Gonzaga University, Spokane, Washington, United States of America
| | - Sarah Cooney
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
| | - Skylar Riley
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
| | - Scott A. Griffith
- Department of Mathematics and Computer Science, Whitworth University, Spokane, Washington, United States of America
| | - Betsy A. Bancroft
- Department of Biology, Gonzaga University, Spokane, Washington, United States of America
- Department of Environmental Studies and Sciences, Gonzaga University, Spokane, Washington, United States of America
- * E-mail:
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Eriksson M, Rafajlović M. The role of phenotypic plasticity in the establishment of range margins. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210012. [PMID: 35067091 PMCID: PMC8784930 DOI: 10.1098/rstb.2021.0012] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 11/16/2021] [Indexed: 12/15/2022] Open
Abstract
It has been argued that adaptive phenotypic plasticity may facilitate range expansions over spatially and temporally variable environments. However, plasticity may induce fitness costs. This may hinder the evolution of plasticity. Earlier modelling studies examined the role of plasticity during range expansions of populations with fixed genetic variance. However, genetic variance evolves in natural populations. This may critically alter model outcomes. We ask: how does the capacity for plasticity in populations with evolving genetic variance alter range margins that populations without the capacity for plasticity are expected to attain? We answered this question using computer simulations and analytical approximations. We found a critical plasticity cost above which the capacity for plasticity has no impact on the expected range of the population. Below the critical cost, by contrast, plasticity facilitates range expansion, extending the range in comparison to that expected for populations without plasticity. We further found that populations may evolve plasticity to buffer temporal environmental fluctuations, but only when the plasticity cost is below the critical cost. Thus, the cost of plasticity is a key factor involved in range expansions of populations with the potential to express plastic response in the adaptive trait. This article is part of the theme issue 'Species' ranges in the face of changing environments (part I)'.
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Affiliation(s)
- Martin Eriksson
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
- The Linnaeus Centre for Marine Evolutionary Biology, University of Gothenburg, Gothenburg, Sweden
- Gothenburg Global Biodiversity Centre, University of Gothenburg, Gothenburg, Sweden
| | - Marina Rafajlović
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
- The Linnaeus Centre for Marine Evolutionary Biology, University of Gothenburg, Gothenburg, Sweden
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Evidence for Negative Impacts on Terrestrial Salamanders following Invasive Plant Removal. J HERPETOL 2022. [DOI: 10.1670/21-018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Dalpasso A, Ficetola GF, Giachello S, Lo Parrino E, Manenti R, Muraro M, Falaschi M. Similar species, different fates: Abundance dynamics in spatially structured populations of common and threatened frogs. DIVERS DISTRIB 2022. [DOI: 10.1111/ddi.13483] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Andrea Dalpasso
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
- Laboratoire d’Écologie Alpine Univ. Grenoble AlpesUniv. Savoie Mont BlancCNRSLECA Grenoble France
| | - Simone Giachello
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
| | - Elia Lo Parrino
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
| | - Raoul Manenti
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
| | - Martina Muraro
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
| | - Mattia Falaschi
- Department of Environmental Science and Policy Università degli Studi di Milano Milan Italy
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Marino C, Leclerc C, Bellard C. Profiling insular vertebrates prone to biological invasions: What makes them vulnerable? GLOBAL CHANGE BIOLOGY 2022; 28:1077-1090. [PMID: 34783130 DOI: 10.1111/gcb.15941] [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: 05/25/2021] [Revised: 09/30/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
Invasive alien species (IAS) are a major threat to insular vertebrates, although the ecological characteristics that make insular communities vulnerable to IAS are poorly understood. After describing the ecological strategies of 6015 insular amphibians, birds, lizards, and mammals, we assessed the functional and ecological features of vertebrates exposed to IAS. We found that at least 50% of insular amphibian functional richness was hosted by IAS-threatened amphibians and up to 29% for birds. Moreover, all IAS-threatened groups except birds harbored a higher functional richness than species groups threatened by other threats. Disentangling the ecological strategies threatened by IAS, compared to those associated with other threats, we showed that birds, lizards, and mammals were more likely to be terrestrial foragers and amphibians to have larval development. By contrast, large-bodied species and habitat specialists were universally threatened. By considering the functional aspect of threatened insular diversity, our work improves our understanding of global IAS impacts. This new dimension proves essential for undertaking relevant and effective conservation actions.
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Affiliation(s)
- Clara Marino
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
| | - Camille Leclerc
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
| | - Céline Bellard
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
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Zambrano-Fernández S, Zamora-Camacho FJ, Aragón P. Direct and indirect effects of chronic exposure to ammonium on anuran larvae survivorship, morphology, and swimming speed. CHEMOSPHERE 2022; 287:132349. [PMID: 34826957 DOI: 10.1016/j.chemosphere.2021.132349] [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: 05/23/2021] [Revised: 09/06/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Several constituents of the current global change are usually deemed accountable for the worldwide declines of amphibian populations. Among these, water contamination poses a major threat, especially to larval stages, which are unable to escape a polluted water body. This problem is remarkable in agrosystems, one of the main sources of water pollution and whose area is forecasted to increase in the forthcoming decades. However, pollutants represent a selective pressure that may result in tolerance in affected areas. In this work, we tested whether chronic exposure to a sublethal concentration of ammonium (10 mg/L), one of the most frequent agrochemicals, affects differently hatching success, survivorship, morphology and swimming performance of Pelophylax perezi tadpoles from agrosystem and pine grove habitats. Ammonium diminished survivorship at the earliest stages after hatching. Thus, lower density was a by-product of exposure to ammonium. Higher density slowed down development, reduced snout-vent length, and had a sharper negative effect on body mass and tail length and depth of ammonium treated individuals with respect to the control. In turn, ammonium accelerated development and increased body mass, SVL, and tail length and depth. These effects did not depend on provenance habitat. However, only pine grove tadpoles' swimming speed was negatively affected by ammonium, which supports the hypothesis that agrosystem tadpoles are more tolerant to ammonium. Finally, corroborating previous findings, tadpoles with larger bodies and tails were faster swimmers, whereas proportionally more massive individuals were slower, and tail depth was unrelated to swimming speed.
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Affiliation(s)
| | - Francisco Javier Zamora-Camacho
- Museo Nacional de Ciencias Naturales, (MNCN-CSIC), C/ José Gutiérrez Abascal 2, 28006, Madrid, Spain; Universidad Complutense de Madrid, C/José Antonio Novais 2, 2804, Madrid, Spain.
| | - Pedro Aragón
- Museo Nacional de Ciencias Naturales, (MNCN-CSIC), C/ José Gutiérrez Abascal 2, 28006, Madrid, Spain; Universidad Complutense de Madrid, C/José Antonio Novais 2, 2804, Madrid, Spain
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Muraro M, Romagnoli S, Barzaghi B, Falaschi M, Manenti R, Ficetola GF. Invasive predators induce plastic and adaptive responses during embryo development in a threatened frog. NEOBIOTA 2021. [DOI: 10.3897/neobiota.70.65454] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Invasive predators can strongly affect native populations. If alien predator pressure is strong enough, it can induce anti-predator responses, including phenotypic plasticity of exposed individuals and local adaptations of impacted populations. Furthermore, maternal investment is an additional pathway that could provide resources and improve performance in the presence of alien predators. We investigated the potential responses to an alien predator crayfish (Procambarus clarkii) in a threatened frog (Rana latastei) by combining field observations with laboratory measurements of embryo development rate, to assess the importance of parental investment, origin and exposure to the crayfish cues. We detected a strong variation in parental investment amongst frog populations, but this variation was not related to the invasion status of the site of origin, suggesting that mothers did not modulate parental investment in relation to the presence of alien predators. However, cues of the invasive crayfish elicited plastic responses in clutches and tadpoles development: embryos developed faster when exposed to the predator. Furthermore, embryos from invaded sites reached Gosner’s development stage 25 faster than those from non-invaded sites. This ontogenetic shift can be interpreted as a local adaptation to the alien predator and suggests that frogs are able to recognise the predatory risk. If these plastic responses and local adaptation are effective escape strategies against the invasive predator, they may improve the persistence of native frog populations.
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Native anurans threatened by the alien tree Ligustrum lucidum in a seasonal subtropical forest. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02617-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
Anurans have been introduced in many parts of the world and have often become invasive over large geographic areas. Although predation is involved in the declines of invaded amphibian populations, there is a lack of quantitative assessments evaluating the potential risk posed to native species. This is particularly true for Pelophylax water frogs, which have invaded large parts of western Europe, but no studies to date have examined their predation on other amphibians in their invaded range. Predation of native amphibians by marsh frogs (Pelophylax ridibundus) was assessed by stomach flushing once a month over four months in 21 ponds in southern France. Nine percent of stomachs contained amphibians. Seasonality was a major determinant of amphibian consumption. This effect was mediated by body size, with the largest invaders ingesting bigger natives, such as tree frogs. These results show that invasive marsh frogs represent a threat through their ability to forage on natives, particularly at the adult stage. The results also indicate that large numbers of native amphibians are predated. More broadly, the fact that predation was site- and time-specific highlights the need for repeated samplings across habitats and key periods for a clear understanding of the impact of invaders.
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Falaschi M, Giachello S, Lo Parrino E, Muraro M, Manenti R, Ficetola GF. Long-term drivers of persistence and colonization dynamics in spatially structured amphibian populations. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2021; 35:1530-1539. [PMID: 33355400 DOI: 10.1111/cobi.13686] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
Many organisms live in networks of local populations connected by dispersing individuals, called spatially structured populations (SSPs), where the long-term persistence of the entire network is determined by the balance between 2 processes acting at the scale of local populations: extinction and colonization. When multiple threats act on an SSP, a comparison of the different factors determining local extinctions and colonizations is essential to plan sound conservation actions. We assessed the drivers of long-term population dynamics of multiple amphibian species at the regional scale. We used dynamic occupancy models within a Bayesian framework to identify the factors determining persistence and colonization of local populations. Because connectivity among patches is fundamental to SSPs dynamics, we considered 2 measures of connectivity acting on each focal patch: incidence of the focal species and incidence of invasive crayfish. We used meta-analysis to summarize the effect of different drivers at the community level. Persistence and colonization of local populations were jointly determined by factors acting at different scales. Persistence probability was positively related to the area and the permanence of wetlands, whereas it was negatively related to occurrence of fish. Colonization probability was highest in semipermanent wetlands and in sites with a high incidence of the focal species in nearby sites, whereas it showed a negative relationship with the incidence of invasive crayfish in the landscape. By analyzing long-term data on amphibian population dynamics, we found a strong effect of some classic features commonly used in SSP studies, such as patch area and focal species incidence. The presence of an invasive non-native species at the landscape scale emerged as one of the strongest drivers of colonization dynamics, suggesting that studies on SSPs should consider different connectivity measures more frequently, such as the incidence of predators, especially when dealing with biological invasions.
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Affiliation(s)
- Mattia Falaschi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
| | - Simone Giachello
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
| | - Elia Lo Parrino
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
| | - Martina Muraro
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, Milan, 20133, Italy
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA (Laboratoire d'Écologie Alpine), Grenoble, F-38000, France
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33
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Melotto A, Ficetola GF, Alari E, Romagnoli S, Manenti R. Visual recognition and coevolutionary history drive responses of amphibians to an invasive predator. Behav Ecol 2021. [DOI: 10.1093/beheco/arab101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Abstract
During biotic invasions, native prey are abruptly exposed to novel predators and are faced with unprecedented predatory pressures. Under these circumstances, the lack of common evolutionary history may hamper predator recognition by native prey, undermining the expression of effective antipredator responses. Nonetheless, mechanisms allowing prey to overcome evolutionary naïveté exist. For instance, in naïve prey, history of coevolution with similar native predators or detection of general traits characterizing predators can favor the recognition of stimuli released by invasive predators. However, few studies have assessed how these mechanisms shape prey response at the community level. Here, we evaluated behavioral responses in naïve larvae of 13 amphibian species to chemical and visual cues associated with an invasive predator, the American red swamp crayfish (Procambarus clarkii). Moreover, we investigated how variation among species responses was related to their coexistence with similar native crayfish predators. Amphibian larvae altered their behavior in presence of visual stimuli of the alien crayfish, while chemical cues elicited feeble and contrasting behavioral shifts. Activity reduction was the most common and stronger response, whereas some species exhibited more heterogeneous strategies also involving distancing and rapid escape response. Interestingly, species sharing coevolutionary history with the native crayfish were able to finely tune their response to the invasive one, performing bursts to escape. These results suggest native prey can respond to invasive predators through recognition of generic risk cues (e.g., approaching large shapes), still the capability of modulating antipredator strategies may also depend on their coevolutionary history with similar native predators.
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Affiliation(s)
- Andrea Melotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan 20133, Italy
- Centre of Excellence for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan 20133, Italy
- Laboratoire D’Ecologie Alpine (LECA), CNRS, Université de Grenoble Alpes, Grenoble 38000, France
| | - Elisa Alari
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan 20133, Italy
| | - Samuele Romagnoli
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan 20133, Italy
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan 20133, Italy
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34
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Hughes AC, Marshall BM, Strine C. Gaps in global wildlife trade monitoring leave amphibians vulnerable. eLife 2021; 10:70086. [PMID: 34382939 PMCID: PMC8425949 DOI: 10.7554/elife.70086] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/11/2021] [Indexed: 11/21/2022] Open
Abstract
As the biodiversity crisis continues, we must redouble efforts to understand and curb pressures pushing species closer to extinction. One major driver is the unsustainable trade of wildlife. Trade in internationally regulated species gains the most research attention, but this only accounts for a minority of traded species and we risk failing to appreciate the scale and impacts of unregulated legal trade. Despite being legal, trade puts pressure on wild species via direct collection, introduced pathogens, and invasive species. Smaller species-rich vertebrates, such as reptiles, fish, and amphibians, may be particularly vulnerable to trading because of gaps in regulations, small distributions, and demand of novel species. Here, we combine data from five sources: online web searches in six languages, Convention on International Trade in Endangered Species (CITES) trade database, Law Enforcement Management Information System (LEMIS) trade inventory, IUCN assessments, and a recent literature review, to characterise the global trade in amphibians, and also map use by purpose including meat, pets, medicinal, and for research. We show that 1215 species are being traded (17% of amphibian species), almost three times previous recorded numbers, 345 are threatened, and 100 Data Deficient or unassessed. Traded species origin hotspots include South America, China, and Central Africa; sources indicate 42% of amphibians are taken from the wild. Newly described species can be rapidly traded (mean time lag of 6.5 years), including threatened and unassessed species. The scale and limited regulation of the amphibian trade, paired with the triptych of connected pressures (collection, pathogens, invasive species), warrants a re-examination of the wildlife trade status quo, application of the precautionary principle in regard to wildlife trade, and a renewed push to achieve global biodiversity goals. In the last few decades, exotic pets have become much more common. In the UK in 2008, reptiles and amphibians were more popular than dogs, with over eight million in captivity. But while almost all pet cats and dogs are born and bred in captivity, exotic pets are often taken from the wild, putting species and their habitats at risk. An international trade agreement called the Convention on International Trade in Endangered Species (CITES) strives to prevent unsustainable animal trade. But to get CITES protection, species depend on data showing that wildlife trade threatens their survival. In addition, their range countries need to first propose them to be listed. For most wild animal species, there are no data on population size or population decline. In the case of amphibians, CITES regulates the trade of just 2.5% of species. This leaves the rest with no protection from overarching international trade regulations. To protect these animals, researchers need to find out which species are in trade, where they are coming from, and how many are already threatened. To address this, Hughes, Marshall and Strine combined data from five sources, including official CITES trade records, recent research and an online search for amphibian sales in six languages. The data showed evidence of trade in at least 1,215 amphibian species, representing 17% of all amphibians. The figure is three times higher than previous estimates. Of the species in trade, more than one in five is vulnerable to extinction, endangered, or critically endangered. For a further 100 of the traded species, data on population were unavailable. Moreover, analysis of the origins of traded individuals showed that around 42% came from the wild. Tropical parts of the world had the highest number of species in trade, but the data showed exchanges happening across the globe. Unsustainable wildlife trade can have devastating consequences for wild animals. It has already driven at least 21 reptile species to extinction, and data of amphibian species are unknown. To prevent further species going extinct, legal wildlife trade should follow the precautionary principle when it comes to wildlife trade. Rather than allowing people to trade a species until CITES regulates it, a blanket ban should come into force for species that have not been assessed or are threatened. Trade would be able to resume for a species only when assessments show that it would not cause major population decline, or secure, captive breeding facilities can be guaranteed.
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Affiliation(s)
- Alice C Hughes
- Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
| | - Benjamin Michael Marshall
- Institute of Science, School of Biology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Colin Strine
- School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand, Nakhon Ratchasima, Thailand
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35
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Raised by aliens: constant exposure to an invasive predator triggers morphological but not behavioural plasticity in a threatened species tadpoles. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02603-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractDuring biotic invasions, native communities are abruptly exposed to novel and often severe selective pressures. The lack of common evolutionary history with invasive predators can hamper the expression of effective anti-predator responses in native prey, potentially accelerating population declines. Nonetheless, rapid adaptation and phenotypic plasticity may allow native species to cope with the new ecological pressures. We tested the hypothesis that phenotypic plasticity is fostered when facing invasive species and evaluated whether plasticity offers a pool of variability that might help the fixation of adaptive phenotypes. We assessed behavioural and morphological trait variation in tadpoles of the Italian agile frog (Rana latastei) in response to the invasive crayfish predator, Procambarus clarkii, by rearing tadpoles under different predation-risk regimes: non-lethal crayfish presence and crayfish absence. After two-month rearing, crayfish-exposed tadpoles showed a plastic shift in their body shape and increased tail muscle size, while behavioural tests showed no effect of crayfish exposure on tadpole behaviour. Furthermore, multivariate analyses revealed weak divergence in morphology between invaded and uninvaded populations, while plasticity levels were similar between invaded and uninvaded populations. Even if tadpoles displayed multiple plastic responses to the novel predator, none of these shifts underwent fixation after crayfish arrival (10–15 years). Overall, these findings highlight that native prey can finely tune their responses to invasive predators through plasticity, but the adaptive value of these responses in whitstanding the novel selective pressures, and the long-term consequences they can entail remain to be ascertained.
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Cogălniceanu D, Stănescu F, Székely D, Topliceanu TS, Iosif R, Székely P. Age, size and body condition do not equally reflect population response to habitat change in the common spadefoot toad Pelobates fuscus. PeerJ 2021; 9:e11678. [PMID: 34316392 PMCID: PMC8286710 DOI: 10.7717/peerj.11678] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/04/2021] [Indexed: 11/20/2022] Open
Abstract
Urbanization impacts biodiversity both directly through physical expansion over land, and indirectly due to land use conversion and human behaviors associated with urban areas. We assessed the response of a common spadefoot toad population (Pelobates fuscus) to habitat loss and fragmentation resulting from urban development by studying changes in size, body condition and age parameters. We compared samples collected in the early 2000s (sample A) and later on during 2012-2014 (sample B). The terrestrial habitats in the study area were severely reduced and fragmented due to the expansion of the human settlement. We found no significant differences in the age parameters between the two sampling periods; the median lifespan shortened from 3.5 (sample A) to 3.0 years (sample B), while the other age parameters were similar in both samples. In contrast, snout-vent length, body mass and body condition experienced a significant decrease over time. Our results suggest that changes in body size and body condition, rather than age parameters, better reflect the response of the common spadefoot toad population to declining habitat quality. Therefore, body measurements can provide reliable estimates of the impact of habitat degradation in amphibian populations.
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Affiliation(s)
- Dan Cogălniceanu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania.,Asociația Chelonia Romania, Bucharest, Romania
| | - Florina Stănescu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania.,Black Sea Institute for Development and Security Studies, Ovidius University Constanța, Constanța, Romania.,CEDMOG-Center for Morphological and Genetic Studies of Malignant Pathology, Ovidius University Constanța, Constanța, Romania
| | - Diana Székely
- Asociația Chelonia Romania, Bucharest, Romania.,Departamento de Ciencias Biológicas y Agropecuarias, Laboratorio de Ecología Tropical y Servicios Ecosistémicos (EcoSs Lab), Universidad Técnica Particular de Loja, Loja, Ecuador
| | - Theodor-Sebastian Topliceanu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania.,Black Sea Institute for Development and Security Studies, Ovidius University Constanța, Constanța, Romania.,CEDMOG-Center for Morphological and Genetic Studies of Malignant Pathology, Ovidius University Constanța, Constanța, Romania
| | - Ruben Iosif
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania.,Asociația Chelonia Romania, Bucharest, Romania
| | - Paul Székely
- Asociația Chelonia Romania, Bucharest, Romania.,Departamento de Ciencias Biológicas y Agropecuarias, Laboratorio de Ecología Tropical y Servicios Ecosistémicos (EcoSs Lab), Universidad Técnica Particular de Loja, Loja, Ecuador
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37
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Can road stormwater ponds be successfully exploited by the European green frog (Pelophylax sp.)? Urban Ecosyst 2021. [DOI: 10.1007/s11252-021-01129-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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38
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Value-conflicts in the conservation of a native species: a case study based on the endangered white-clawed crayfish in Europe. RENDICONTI LINCEI. SCIENZE FISICHE E NATURALI 2021. [DOI: 10.1007/s12210-021-00987-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractThe future of the native European crayfish Austropotamobius pallipes depends on accurate conservation management. The goal of this paper is to attempt an investigation of the major ethical conflicts that can emerge in the conservation of this endangered crayfish threatened by invasive competitors, introduced diseases, and landscape alteration. To assess this issue, we will employ the Ethical Matrix, in a version explicitly tailored for its use in conservation. The filled Ethical Matrix will highlight several potential conflicts between values such as environmental protection, social and economic interests, animal welfare, cultural and aesthetic value, etc. We will discuss these conflicts, alongside some potential mitigating strategies present in the literature. We will stress in particular the need to take into account the ethical principle of fairness when assessing the economic and recreational value of invasive species, especially concerning the unfair distribution of costs. Moreover, we will assert the importance of conservation of A. pallipes both for its existence value and for its role as an umbrella and keystone species. Beyond its focus on A. pallipes, the Ethical Matrix here discussed might also provide insights on the value conflicts relative to analogous in situ conservation efforts involving a native species threatened by invasive alien competitors.
Graphic abstract
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Titon SCM, Assis VR. Introduction to the special issue: Ecoimmunology in ectotherms. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2021; 333:697-705. [PMID: 33450144 DOI: 10.1002/jez.2437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Stefanny C M Titon
- Laboratório de Comportamento e Fisiologia Evolutiva, Rua do Matão, Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Vania R Assis
- Laboratório de Comportamento e Fisiologia Evolutiva, Rua do Matão, Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
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Ginal P, Moreira FD, Marques R, Rebelo R, Rödder D. Predicting terrestrial dispersal corridors of the invasive African clawed frog Xenopus laevis in Portugal. NEOBIOTA 2021. [DOI: 10.3897/neobiota.64.60004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Invasive species, such as the mainly aquatic African clawed frog Xenopus laevis, are a main threat to global biodiversity. The identification of dispersal corridors is necessary to restrict further expansion of these species and help to elaborate management plans for their control and eradication. Here we use remote sensing derived resistance surfaces, based on the normalised difference vegetation index (NDVI) and the normalised difference water index (NDWI) accounting for behavioural and physiological dispersal limitations of the species, in combination with elevation layers, to determine fine scale dispersal patterns of invasive populations of X. laevis in Portugal, where the frog had established populations in two rivers. We reconstruct past dispersal routes between these two invaded rivers and highlight high risk areas for future expansion. Our models suggest terrestrial dispersal corridors that connect both invaded rivers and identify artificial water bodies as stepping stones for overland movement of X. laevis. Additionally, we found several potential stepping stones into novel areas and provide concrete information for invasive species management.
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Melotto A, Manenti R, Ficetola GF. Rapid adaptation to invasive predators overwhelms natural gradients of intraspecific variation. Nat Commun 2020; 11:3608. [PMID: 32681028 PMCID: PMC7368066 DOI: 10.1038/s41467-020-17406-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 06/29/2020] [Indexed: 11/08/2022] Open
Abstract
Invasive predators can exert strong selection on native populations. If selection is strong enough, populations could lose the phenotypic variation caused by adaptation to heterogeneous environments. We compare frog tadpoles prior to and 14 years following invasion by crayfish. Prior to the invasion, populations differed in their intrinsic developmental rate, with tadpoles from cold areas reaching metamorphosis sooner than those from warm areas. Following the invasion, tadpoles from invaded populations develop faster than those from non-invaded populations. This ontogenetic shift overwhelmed the intraspecific variation between populations in a few generations, to the point where invaded populations develop at a similar rate regardless of climate. Rapid development can have costs, as fast-developing froglets have a smaller body size and poorer jumping performance, but compensatory growth counteracts some costs of development acceleration. Strong selection by invasive species can disrupt local adaptations by dampening intraspecific phenotypic variation, with complex consequences on lifetime fitness.
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Affiliation(s)
- Andrea Melotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano, 20133, Italy.
- Centre of Excellence for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Stellenbosch, Western Cape, South Africa.
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano, 20133, Italy.
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano, 20133, Italy
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA - Laboratoire d'Écologie Alpine, F-38000, Grenoble, France
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Green DM, Lannoo MJ, Lesbarrères D, Muths E. Amphibian Population Declines: 30 Years of Progress in Confronting a Complex Problem. HERPETOLOGICA 2020. [DOI: 10.1655/0018-0831-76.2.97] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- David M. Green
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
| | - Michael J. Lannoo
- Indiana University School of Medicine–TH, Terre Haute, IN 47809, USA
| | - David Lesbarrères
- Department of Biology, Laurentian University, Sudbury, ON P3E 2C6, Canada
| | - Erin Muths
- US Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO 80526, USA
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Ford J, Hunt DA, Haines GE, Lewis M, Lewis Y, Green DM. Adrift on a Sea of Troubles: Can Amphibians Survive in a Human-Dominated World?1. HERPETOLOGICA 2020. [DOI: 10.1655/0018-0831-76.2.251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Jessica Ford
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
| | | | - Grant E. Haines
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
| | - Micaela Lewis
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
| | - Yael Lewis
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
| | - David M. Green
- Redpath Museum, McGill University, Montreal, QC H3A 0C4, Canada
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