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Cerini F, Pardo C, Taurozzi D, Gambioli B, Vignoli L. Mutual Avoidance in the Spectacled Salamander and Centipede: A Discrepancy between Exploratory Field and Laboratory Data. Animals (Basel) 2023; 13:3214. [PMID: 37893937 PMCID: PMC10603627 DOI: 10.3390/ani13203214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/26/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Interactions between amphibians and arthropods encompass a wide range of ecological relationships, predominantly characterized by predator-prey dynamics, with adult amphibians as the predators. In some instances, the roles are reversed. This study focuses on the potential predator-prey relationship between the spectacled salamander (Salamandrina perspicillata) and the centipede Scolopendra cingulata in Central Italy. Building upon previous research on chemical cue perception in amphibians, we investigated potential olfactory cue-mediated avoidance behaviours exhibited by S. perspicillata towards the potential predator S. cingulata through field observations and manipulative experiments. In a natural site, we estimated the degree of negative co-occurrence between the study species under shelters and found an avoidance pattern between S. perspicillata and S. cingulata in refuges. However, when the study species were forced to choose between sharing or not sharing a given shelter, through a manipulative experiment, the avoidance pattern was not confirmed. Potential determinants contributing to the avoidance pattern observed in nature are discussed. Our exploratory results represent a good example of how what often appears to be a strong observation-based pattern in natural settings needs to be carefully scrutinized. Hypotheses testing through experiments in controlled environments remains a valuable approach to exclude potentially misleading processes.
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Affiliation(s)
- Francesco Cerini
- Dipartimento Scienze Ecologiche e Biologiche, Università della Tuscia, 01100 Viterbo, Italy
| | - Claudio Pardo
- Dipartimento Scienze Ecologiche e Biologiche, Università della Tuscia, 01100 Viterbo, Italy
| | - Davide Taurozzi
- Dipartimento di Scienze, Università Roma Tre, 00154 Rome, Italy; (D.T.); (B.G.); (L.V.)
| | - Benedetta Gambioli
- Dipartimento di Scienze, Università Roma Tre, 00154 Rome, Italy; (D.T.); (B.G.); (L.V.)
| | - Leonardo Vignoli
- Dipartimento di Scienze, Università Roma Tre, 00154 Rome, Italy; (D.T.); (B.G.); (L.V.)
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The impact of the striped field mouse's range expansion on communities of native small mammals. Sci Rep 2023; 13:753. [PMID: 36641462 PMCID: PMC9840622 DOI: 10.1038/s41598-022-26919-z] [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: 08/18/2022] [Accepted: 12/21/2022] [Indexed: 01/15/2023] Open
Abstract
Understanding species expansion as an element of the dispersal process is crucial to gaining a better comprehension of the functioning of the populations and the communities. Populations of the same species that are native in one area could be considered nonindigenous, naturalised or invasive somewhere else. The striped field mouse has been expanding its range in south-western Slovakia since 2010, although the origin of the spread has still not been clarified. In light of the striped field mouse's life history, the recent range expansion is considered to be the expansion of a native species. This study analyses the impact of the striped field mouse's expansion on the native population and small mammal communities and confronts the documented stages of striped field mouse expansion with the stages of invasion biology. Our research replicates the design and compares results from past research of small mammals prior to this expansion at the same three study areas with the same 20 study sites and control sites. Several years after expansion, the striped field mouse has a 100% frequency of occurrence in all study sites and has become the dominant species in two of the study areas. The native community is significantly affected by the striped field mouse's increasing dominance, specifically: (i) we found a re-ordering of the species rank, mainly in areas with higher dominance, and (ii) an initial positive impact on diversity and evenness during low dominance of the striped field mouse turned markedly negative after crossing the 25% dominance threshold. Results suggested that the variation in the striped field mouse's dominance is affected by the northern direction of its spread. Our findings show that establishment in a new area, spread and impact on the native community are stages possibly shared by both invasive and native species during their range expansion.
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Global Warming and Long-Distance Spread of Invasive Discoglossus pictus (Amphibia, Alytidae): Conservation Implications for Protected Amphibians in the Iberian Peninsula. Animals (Basel) 2022; 12:ani12233236. [PMID: 36496757 PMCID: PMC9736426 DOI: 10.3390/ani12233236] [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: 08/19/2022] [Revised: 10/06/2022] [Accepted: 11/12/2022] [Indexed: 11/24/2022] Open
Abstract
Discoglossus pictus is a North African amphibian that was introduced in southern France early the 20th century and has spread south and north along the Mediterranean coastal plains up to 170 km. In order to disentangle the conservation implications of the spread of D. pictus for sensitive native species, we examined the impact of long-term climate warming on the basis of niche overlap analysis, taking into account abiotic factors. The study area covered the distribution ranges of all genus Discoglossus species in northwestern Africa (659,784 km2), Sicily (27,711 km2), the Iberian Peninsula, and southern France (699,546 km2). Niche overlap was measured from species environmental spaces extracted via PCA, including climate and relief environmental variables. Current and future climatic suitability for each species was assessed in an ensemble-forecasting framework of species distribution models, built using contemporary species data and climate predictors and projected to 2070's climatic conditions. Our results show a strong climatic niche overlap between D. pictus and native and endemic species in the Iberian Peninsula. In this context, all species will experience an increase in climatic suitability over the next decades, with the only exception being Pelodytes punctatus, which could be negatively affected by synergies between global warming and cohabitation with D. pictus.
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Li Q, Xiong Z, Lu B, Pu Y, Li Y, Zhang Y, Duan Y. Trophic niche differentiation between invasive and native frog species in urban wetlands of Kunming, China. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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5
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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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Pujol-Buxó E, Kaliontzopoulou A, Unanue-Goikoetxea G, Ambrós B, Llorente GA. Geographical differences in competitive hierarchy in a native–invasive system. Biol J Linn Soc Lond 2020. [DOI: 10.1093/biolinnean/blaa124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Abstract
Biological invasions can create novel competitive interactions and force ecological shifts in both native and invasive species. Anuran tadpoles are able to modify their behaviour, morphology, growth and development to cope with competitive pressure. This plasticity is a good target for natural selection and can drive rapid evolutionary changes in response to novel interactions. Here, we explore changes in plastic responses and fitness of competing invasive and native tadpoles by exposing tadpoles from different locations with contrasting evolutionary histories to the same set of varied competitive conditions. Eggs were collected from one site near the first introduction of the invasive frog (~110 years of coexistence) and from a second site that was invaded recently. We hypothesized less favourable outcomes for the invasive species in long-coexisting populations, where the native competitor might have developed adaptive responses. Most results support the hypothesis. Where the invasion was older, invasive tadpoles exposed to native competitors grew less, developed more slowly and displayed morphologies linked to competitive stress, whereas the developmental stability and canalization of native tadpoles increased. On the whole, the asymmetric competitive relationship thus appeared to approach symmetry after ~35 generations, highlighting a noteworthy example of rapid adaptation after an invasion.
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Affiliation(s)
- Eudald Pujol-Buxó
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Antigoni Kaliontzopoulou
- CIBIO/InBIO, Research Centre in Biodiversity and Genetic Resources, University of Porto, Campus Agrario de Vairão, Vairão, Portugal
| | - Gerezti Unanue-Goikoetxea
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Barcelona, Spain
| | - Bàrbara Ambrós
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Barcelona, Spain
| | - Gustavo A Llorente
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
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Affiliation(s)
- Mattia Falaschi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
| | - Andrea Melotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
| | - 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
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8
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Pujol-Buxó E, Riaño GM, Llorente GA. Stable isotopes reveal mild trophic modifications in a native–invasive competitive relationship. Biol Invasions 2018. [DOI: 10.1007/s10530-018-1893-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Vidal-García M, Keogh JS. Invasive cane toads are unique in shape but overlap in ecological niche compared to Australian native frogs. Ecol Evol 2017; 7:7609-7619. [PMID: 29043018 PMCID: PMC5632638 DOI: 10.1002/ece3.3253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 06/07/2017] [Accepted: 06/28/2017] [Indexed: 11/29/2022] Open
Abstract
Invasive species are an important issue worldwide but predicting invasiveness, and the underlying mechanisms that cause it, is difficult. There are several primary hypotheses to explain invasion success. Two main hypothesis based on niche spaces stand out as alternative, although not exclusive. The empty niche hypothesis states that invaders occupy a vacant niche space in the recipient community, and the niche competition hypothesis states that invaders overlap with native species in niche space. Studies on trait similarity/dissimilarity between the invader and native species can provide information on their niche overlap. Here, we use the highly invasive and well‐studied cane toad (Rhinella marina) to test these two hypotheses in Australia, and assess its degree of overlap with native species in several niche dimensions. We compare extensive morphological and environmental data of this successful invader to 235 species (97%) of native Australian frogs. Our study is the first to document the significant morphological differences between the invasive cane toad and a continent‐wide frog radiation: despite significant environmental overlap, cane toads were distinct in body size and shape from most Australian frog species, suggesting that in addition to their previously documented phenotypic plasticity and wide environmental and trophic niche breadth, their unique shape also may have contributed to their success as an invasive species in Australia. Thus, the invasive success of cane toads in Australia may be explained through them successfully colonizing an empty niche among Australian anurans. Our results support that the cane toad's distinct morphology may have played a unique role in the invasiveness of this species in Australia, which coupled with a broad environmental niche breadth, would have boosted their ability to expand their distribution across Australia. We also propose RLLR (Relative limb length ratio) as a potentially useful measure of identifying morphological niche uniqueness and a potential measure of invasiveness potential in anuran amphibians.
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Affiliation(s)
- Marta Vidal-García
- Ecology and Evolution Research School of Biology The Australian National University Canberra ACT Australia
| | - J Scott Keogh
- Ecology and Evolution Research School of Biology The Australian National University Canberra ACT Australia
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Kumschick S, Measey GJ, Vimercati G, de Villiers FA, Mokhatla MM, Davies SJ, Thorp CJ, Rebelo AD, Blackburn TM, Kraus F. How repeatable is the Environmental Impact Classification of Alien Taxa (EICAT)? Comparing independent global impact assessments of amphibians. Ecol Evol 2017; 7:2661-2670. [PMID: 28428857 PMCID: PMC5395449 DOI: 10.1002/ece3.2877] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 01/25/2017] [Accepted: 02/07/2017] [Indexed: 11/12/2022] Open
Abstract
The magnitude of impacts some alien species cause to native environments makes them targets for regulation and management. However, which species to target is not always clear, and comparisons of a wide variety of impacts are necessary. Impact scoring systems can aid management prioritization of alien species. For such tools to be objective, they need to be robust to assessor bias. Here, we assess the newly proposed Environmental Impact Classification for Alien Taxa (EICAT) used for amphibians and test how outcomes differ between assessors. Two independent assessments were made by Kraus (Annual Review of Ecology Evolution and Systematics, 46, 2015, 75‐97) and Kumschick et al. (Neobiota, 33, 2017, 53‐66), including independent literature searches for impact records. Most of the differences between these two classifications can be attributed to different literature search strategies used with only one‐third of the combined number of references shared between both studies. For the commonly assessed species, the classification of maximum impacts for most species is similar between assessors, but there are differences in the more detailed assessments. We clarify one specific issue resulting from different interpretations of EICAT, namely the practical interpretation and assigning of disease impacts in the absence of direct evidence of transmission from alien to native species. The differences between assessments outlined here cannot be attributed to features of the scheme. Reporting bias should be avoided by assessing all alien species rather than only the seemingly high‐impacting ones, which also improves the utility of the data for management and prioritization for future research. Furthermore, assessments of the same taxon by various assessors and a structured review process for assessments, as proposed by Hawkins et al. (Diversity and Distributions, 21, 2015, 1360), can ensure that biases can be avoided and all important literature is included.
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Affiliation(s)
- Sabrina Kumschick
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa.,Invasive Species Programme South African National Biodiversity Institute Kirstenbosch National Botanical Gardens Claremont South Africa
| | - G John Measey
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Giovanni Vimercati
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - F Andre de Villiers
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Mohlamatsane M Mokhatla
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Sarah J Davies
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Corey J Thorp
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Alexander D Rebelo
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa
| | - Tim M Blackburn
- Centre for Invasion Biology Department of Botany & Zoology, Stellenbosch University Matieland South Africa.,Department of Genetics, Evolution & Environment Centre for Biodiversity & Environment Research University College London London UK.,Institute of Zoology Zoological Society of London Regent's Park, London NW1 4RY UK
| | - Fred Kraus
- Department of Ecology and Evolutionary Biology University of Michigan Ann Arbor MI USA
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Smith RL, Beard KH, Shiels AB. Different prey resources suggest little competition between non-native frogs and insectivorous birds despite isotopic niche overlap. Biol Invasions 2016. [DOI: 10.1007/s10530-016-1333-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Carreira BM, Segurado P, Orizaola G, Gonçalves N, Pinto V, Laurila A, Rebelo R. Warm vegetarians? Heat waves and diet shifts in tadpoles. Ecology 2016; 97:2964-2974. [DOI: 10.1002/ecy.1541] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/21/2016] [Accepted: 07/05/2016] [Indexed: 01/03/2023]
Affiliation(s)
- B. M. Carreira
- cE3c Centre for Ecology, Evolution and Environmental Changes; Faculdade de Ciências da Universidade de Lisboa; Bloco C2, Campo Grande 1749-016 Lisboa Portugal
- Animal Ecology/Department of Ecology and Genetics; Uppsala University; Norbyvägen 18D S-75236 Uppsala Sweden
| | - P. Segurado
- Centro de Estudos Florestais; Instituto Superior de Agronomia da Universidade de Lisboa; 1349-017 Lisboa Portugal
| | - G. Orizaola
- Animal Ecology/Department of Ecology and Genetics; Uppsala University; Norbyvägen 18D S-75236 Uppsala Sweden
| | - N. Gonçalves
- cE3c Centre for Ecology, Evolution and Environmental Changes; Faculdade de Ciências da Universidade de Lisboa; Bloco C2, Campo Grande 1749-016 Lisboa Portugal
| | - V. Pinto
- cE3c Centre for Ecology, Evolution and Environmental Changes; Faculdade de Ciências da Universidade de Lisboa; Bloco C2, Campo Grande 1749-016 Lisboa Portugal
| | - A. Laurila
- Animal Ecology/Department of Ecology and Genetics; Uppsala University; Norbyvägen 18D S-75236 Uppsala Sweden
| | - R. Rebelo
- cE3c Centre for Ecology, Evolution and Environmental Changes; Faculdade de Ciências da Universidade de Lisboa; Bloco C2, Campo Grande 1749-016 Lisboa Portugal
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13
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Pujol‐Buxó E, García‐Guerrero C, Llorente GA. Alien versus predators: effective induced defenses of an invasive frog in response to native predators. J Zool (1987) 2016. [DOI: 10.1111/jzo.12411] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Pujol‐Buxó
- Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Universitat de Barcelona Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona Barcelona Spain
| | - C. García‐Guerrero
- Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Universitat de Barcelona Barcelona Spain
| | - G. A. Llorente
- Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Universitat de Barcelona Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona Barcelona Spain
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15
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Oromi N, Pujol-Buxó E, San Sebastián O, Llorente GA, Hammou MA, Sanuy D. Geographical variations in adult body size and reproductive life history traits in an invasive anuran, Discoglossus pictus. ZOOLOGY 2016; 119:216-223. [PMID: 26995099 DOI: 10.1016/j.zool.2016.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 12/22/2015] [Accepted: 02/15/2016] [Indexed: 11/16/2022]
Abstract
Variability in life history traits positively affects the establishment and expansive potential of invasive species. In the present study, we analysed the variation of body size in seven populations - two native and five invasive - of the painted frog (Discoglossus pictus, Anura: Discoglossidae), native to North Africa and introduced in southern France and the north-east of the Iberian Peninsula. Other life history traits (age at maturity, size at maturity, longevity, median age and potential reproductive lifespan) were analysed in a native and an invasive population. We observed geographic variations in adult body size, related mainly to mean annual precipitation. Thus, populations had greater body size as mean annual precipitation increased, resulting in bigger specimens in the invasive populations. Adult body size and growth rates also varied between sexes in all studied populations, with males significantly larger than females. Age distribution varied between native (1-5 years) and invasive populations (2-4 years) and also between sexes. Our results suggest that higher precipitation promotes faster growth rates and larger adult body size that could facilitate the successful establishment of invasive populations.
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Affiliation(s)
- Neus Oromi
- Escola Superior d'Enginyeria Agrària, Departament de Producció Animal (Fauna Silvestre), Universitat de Lleida, Av. Rovira Roure 191, 25198 Lleida, Spain; Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, Department of Biology, Ecology and Evolution, University of Liege, 22 Quai van Beneden, 4020 Liege, Belgium.
| | - Eudald Pujol-Buxó
- Departament de Biologia Animal (Vertebrats), Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028 Barcelona, Spain; Institut de Recerca de la Biodiversitat, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028 Barcelona, Spain
| | - Olatz San Sebastián
- Departament de Biologia Animal (Vertebrats), Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028 Barcelona, Spain
| | - Gustavo A Llorente
- Departament de Biologia Animal (Vertebrats), Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028 Barcelona, Spain; Institut de Recerca de la Biodiversitat, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028 Barcelona, Spain
| | - Mohamed Aït Hammou
- Faculty of Agricultural Sciences and Veterinary Department of Agricultural Sciences, Ibn Khaldoun University, Tiaret, Algeria
| | - Delfi Sanuy
- Escola Superior d'Enginyeria Agrària, Departament de Producció Animal (Fauna Silvestre), Universitat de Lleida, Av. Rovira Roure 191, 25198 Lleida, Spain
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Abstract
Alien herpetofauna have a broad diversity of ecological and evolutionary impacts, involving seven mechanisms. Ecological impacts usually result from trophic disruptions and may be direct or indirect and top-down or bottom-up; they may vary in scale from single species to communities. A single species may impose impacts involving most or all of these categories. Evolutionary impacts most often result from hybridization and introgression but may include diverse changes in native fauna induced by selection. Impact magnitudes observed to date largely range from moderate to major, but massive impacts (including species extinction) are known for a handful of invasive species. Research remains skewed toward a small sample of all invaders, and major research gaps remain in understanding community-level impacts, the risk posed by competition, determinants of predation impact, the relevance of genetic diversity to impacts, and how to predict impacts.
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Affiliation(s)
- Fred Kraus
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan 48109
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Dalecky A, Bâ K, Piry S, Lippens C, Diagne CA, Kane M, Sow A, Diallo M, Niang Y, Konečný A, Sarr N, Artige E, Charbonnel N, Granjon L, Duplantier JM, Brouat C. Range expansion of the invasive house mouse M
us musculus domesticus
in Senegal, West Africa: a synthesis of trapping data over three decades, 1983-2014. Mamm Rev 2015. [DOI: 10.1111/mam.12043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ambroise Dalecky
- Ird; LPED (UMR AMU/IRD); Marseille France
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Khalilou Bâ
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Sylvain Piry
- Inra; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Cédric Lippens
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Christophe A. Diagne
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
- Department of Animal Biology; Cheick Anta Diop University; Dakar Senegal
| | - Mamadou Kane
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Aliou Sow
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Mamoudou Diallo
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Youssoupha Niang
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Adam Konečný
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
- Department of Botany and Zoology; Faculty of Science; Masaryk University; Brno Czech Republic
| | - Nathalie Sarr
- Ird; CBGP (UMR INRA/IRD/CIRAD/Montpellier SupAgro); Campus de Bel-Air BP1386 CP18524 Dakar Senegal
| | - Emmanuelle Artige
- Inra; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Nathalie Charbonnel
- Inra; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Laurent Granjon
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Jean-Marc Duplantier
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
| | - Carine Brouat
- Ird; CBGP (UMR INRA/IRD/Cirad/Montpellier SupAgro); Montferrier sur Lez cedex France
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San Sebastián O, Navarro J, Llorente GA, Richter-Boix Á. Trophic Strategies of a Non-Native and a Native Amphibian Species in Shared Ponds. PLoS One 2015; 10:e0130549. [PMID: 26101880 PMCID: PMC4478020 DOI: 10.1371/journal.pone.0130549] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 05/22/2015] [Indexed: 11/19/2022] Open
Abstract
One of the critical factors for understanding the establishment, success and potential impact on native species of an introduced species is a thorough knowledge of how these species manage trophic resources. Two main trophic strategies for resource acquisition have been described: competition and opportunism. In the present study our objective was to identify the main trophic strategies of the non-native amphibian Discoglossus pictus and its potential trophic impact on the native amphibian Bufo calamita. We determine whether D. pictus exploits similar trophic resources to those exploited by the native B. calamita (competition hypothesis) or alternative resources (opportunistic hypothesis). To this end, we analyzed the stable isotope values of nitrogen and carbon in larvae of both species, in natural ponds and in controlled laboratory conditions. The similarity of the δ15N and δ13C values in the two species coupled with isotopic signal variation according to pond conditions and niche partitioning when they co-occurred indicated dietary competition. Additionally, the non-native species was located at higher levels of trophic niches than the native species and B. calamita suffered an increase in its standard ellipse area when it shared ponds with D. pictus. These results suggest niche displacement of B. calamita to non-preferred resources and greater competitive capacity of D. pictus in field conditions. Moreover, D. pictus showed a broader niche than the native species in all conditions, indicating increased capacity to exploit the diversity of resources; this may indirectly favor its invasiveness. Despite the limitations of this study (derived from potential variability in pond isotopic signals), the results support previous experimental studies. All the studies indicate that D. pictus competes with B. calamita for trophic resources with potential negative effects on the fitness of the latter.
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Affiliation(s)
- Olatz San Sebastián
- Departament de Biologia Animal (Vertebrats), Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028, Barcelona, Spain
- CICGE-Centro de Investigação em Ciências Geo-Espaciais, Observatório Astronómico Prof. Manuel de Barros, Alameda do Monte da Virgem, 4430–146, Vila Nova de Gaia, Portugal
- Departamento de Herpetología, Aranzadi Zientzia Elkartea-Sociedad de Ciencias Aranzadi, Zorroagagaina, 11, 20014, Donostia-San Sebastián, Spain
| | - Joan Navarro
- Department of Conservation Biology, Estación Biológica de Doñana (EBD-CSIC), Avda. Américo Vespucio s/n, Sevilla, 41092, Spain
| | - Gustavo A. Llorente
- Departament de Biologia Animal (Vertebrats), Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal, 643, 08028, Barcelona, Spain
| | - Álex Richter-Boix
- Department of Ecology and Genetics, Uppsala Universitet, Norbyvägen 18 D, 752 36, Uppsala, Sweden
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Arribas R, Díaz-Paniagua C, Caut S, Gomez-Mestre I. Stable Isotopes Reveal Trophic Partitioning and Trophic Plasticity of a Larval Amphibian Guild. PLoS One 2015; 10:e0130897. [PMID: 26091281 PMCID: PMC4474902 DOI: 10.1371/journal.pone.0130897] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/25/2015] [Indexed: 11/19/2022] Open
Abstract
Temporary ponds are highly variable systems where resource availability and community structure change extensively over time, and consequently the food web is highly dynamic. Amphibians play a critical role both as consumers and prey in aquatic communities and yet there is still little information on the trophic status of most amphibians. More importantly, little is known about the extent to which they can alter their trophic ecology in response to changing conditions. We experimentally investigated the effects of increased amphibian density, presence of intraguild competitors, and presence of native and invasive predators (either free or caged) on the trophic status of a Mediterranean amphibian guild, using stable isotopes. We observed variations in δ13C and δ15N isotopic values among amphibian species and treatments and differences in their food sources. Macrophytes were the most important food resource for spadefoot toad tadpoles (Pelobates cultripes) and relatively important for all anurans within the guild. High density and presence of P. cultripes tadpoles markedly reduced macrophyte biomass, forcing tadpoles to increase their feeding on detritus, algae and zooplankton, resulting in lower δ13C values. Native dytiscid predators only changed the isotopic signature of newts whereas invasive red swamp crayfish had an enormous impact on environmental conditions and greatly affected the isotopic values of amphibians. Crayfish forced tadpoles to increase detritus ingestion or other resources depleted in δ13C. We found that the opportunistic amphibian feeding was greatly conditioned by intra- and interspecific competition whereas non-consumptive predator effects were negligible. Determining the trophic plasticity of amphibians can help us understand natural and anthropogenic changes in aquatic ecosystems and assess amphibians’ ability to adjust to different environmental conditions.
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Affiliation(s)
- Rosa Arribas
- Ecology, Evolution, and Development Group, Department of Wetland Ecology, Doñana Biological Station, CSIC, Seville, Spain
| | - Carmen Díaz-Paniagua
- Ecology, Evolution, and Development Group, Department of Wetland Ecology, Doñana Biological Station, CSIC, Seville, Spain
| | - Stephane Caut
- Department of Ethology and Conservation of Biodiversity, Doñana Biological Station, CSIC, Seville, Spain
| | - Ivan Gomez-Mestre
- Ecology, Evolution, and Development Group, Department of Wetland Ecology, Doñana Biological Station, CSIC, Seville, Spain
- * E-mail:
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Bucciarelli GM, Blaustein AR, Garcia TS, Kats LB. Invasion Complexities: The Diverse Impacts of Nonnative Species on Amphibians. COPEIA 2014. [DOI: 10.1643/ot-14-014] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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