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Awkerman JA, Purucker ST, Raimondo S, Oliver L. Long-term, landscape-level assessment of aquatic pesticide exposure to identify amphibian ontological traits affecting vulnerability. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2024; 20:1667-1676. [PMID: 38597778 DOI: 10.1002/ieam.4924] [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: 09/29/2023] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
Amphibians worldwide are threatened by habitat loss, some of which is driven by a changing climate, as well as exposure to pesticides, among other causes. The timing and duration of the larval development phase vary between species, thereby influencing the relative impacts of stochastic hydroregime conditions as well as potential aquatic pesticide exposure. We describe the stages of breeding through metamorphosis for eight amphibian species, based on optimal hydroregime conditions, and use a model of pesticide fate and exposure representative of central Florida citrus groves to simulate hydrodynamics based on observed weather data over a 54-year period. Using the Pesticide in Water Calculator and Plant Assessment Tool, we estimated daily wetland depth and pyraclostrobin exposure, with label-recommended application quantities. Species' timing and duration of larval development determined the number of years of suitable hydroregime for breeding and the likelihood of exposure to peak aquatic concentrations of pyraclostrobin. Although the timing of pesticide application determined the number of surviving larvae, density-dependent constraints of wetland hydroregime also affected larval survival across species and seasons. Further defining categorical amphibian life history types and habitat requirements supports the development of screening-level assessments by incorporating environmental stochasticity at the appropriate temporal resolution. Subsequent refinement of these screening-level risk assessment strategies to include spatially explicit landscape data along with terrestrial exposure estimates would offer additional insights into species vulnerability to pesticide exposure throughout the life cycle. Computational simulation of ecologically relevant exposure scenarios, such as these, offers a more realistic interpretation of differential agrichemical risk among species based on their phenology and habits and provides a more situation-specific risk assessment perspective for threatened species. Integr Environ Assess Manag 2024;20:1667-1676. Published 2024. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Jill A Awkerman
- USEPA Office of Research and Development, Gulf Breeze, Florida, USA
| | - Steven T Purucker
- USEPA Office of Research and Development, Durham, North Carolina, USA
| | - Sandy Raimondo
- USEPA Office of Research and Development, Gulf Breeze, Florida, USA
| | - Leah Oliver
- USEPA Office of Research and Development, Gulf Breeze, Florida, USA
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2
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Rannaud-Bartaire P, Demeneix BA, Fini JB. Pressures of the urban environment on the endocrine system: Adverse effects and adaptation. Mol Cell Endocrinol 2024; 583:112125. [PMID: 38147952 DOI: 10.1016/j.mce.2023.112125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 12/28/2023]
Abstract
With an increasing collective awareness of the rapid environmental changes, questions and theories regarding the adaptability of organisms are emerging. Global warming as well as chemical and non-chemical pollution have been identified as triggers of these adaptative changes, but can we link different kinds of stressors to certain phenotypic traits? The physiological adaptation, and particularly endocrine system adaptation, of living beings to urban environments is a fascinating way of studying urban endocrinology, which has emerged as a research field in 2007. In this paper, we stress how endocrine disruption in humans and environment can be studied in the urban environment by measuring the levels of pollution, endocrine activities or adversity. We broaden the focus to include not only exposure to the chemicals that have invaded our private spheres and their effects on wild and domestic species but also non-chemical effectors such as light, noise and climate change. We argue that taking into account the various urban stress factors and their effects on the endocrine system would enable the adoption of new approaches to protect living organisms.
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Affiliation(s)
- Patricia Rannaud-Bartaire
- PhyMa Unit, CNRS UMR 7221, Muséum National d'Histoire Naturelle, F-75005, Paris, France; Université Catholique de Lille, l'hôpital Saint-Vincent-De-Paul, Boulevard de Belfort, 59000, Lille, France
| | - Barbara A Demeneix
- PhyMa Unit, CNRS UMR 7221, Muséum National d'Histoire Naturelle, F-75005, Paris, France
| | - Jean-Baptiste Fini
- PhyMa Unit, CNRS UMR 7221, Muséum National d'Histoire Naturelle, F-75005, Paris, France.
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3
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Renoirt M, Angelier F, Cheron M, Jabaud L, Tartu S, Brischoux F. Population declines of a widespread amphibian in agricultural landscapes. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2024; 111:17. [PMID: 38498200 DOI: 10.1007/s00114-024-01905-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/29/2024] [Accepted: 03/08/2024] [Indexed: 03/20/2024]
Abstract
Modern agricultural practices are suspected to play a major role in the ongoing erosion of biodiversity. In order to assess whether this biodiversity loss is linked to past habitat modifications (e.g. land consolidation) or to current consequences of modern agriculture (e.g. use of agrochemicals), it remains essential to monitor species that have persisted in agricultural landscapes to date. In this study, we assessed the presence, abundance and recent population trends of one such species, the spined toad (Bufo spinosus) along a gradient of habitats from preserved (forests) to highly agricultural sites in rural Western France. Our results showed that both presence and abundance of spined toads were markedly lower in reproductive ponds surrounded by intensive agriculture. The most salient result of our study is the ongoing decline of this species in farmland habitats. Indeed, this result suggests that unknown factors are currently affecting a widespread terrestrial amphibian previously thought to persist in agricultural landscapes. These factors have recently induced strong population declines over the course of a few years. Future investigations are required to identify these factors at a time when anthropogenic activities are currently leading to unprecedented rates of biodiversity loss.
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Affiliation(s)
- Matthias Renoirt
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Marion Cheron
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Laure Jabaud
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Sabrina Tartu
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - François Brischoux
- Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-La Rochelle Université, 79360, Villiers en Bois, France.
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4
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Dillon RM, Paterson JE, Manorome P, Ritchie K, Shirose L, Slavik E, Davy CM. Effects of ophidiomycosis on movement, survival, and reproduction of eastern foxsnakes (Pantherophis vulpinus). Sci Rep 2024; 14:4948. [PMID: 38418485 PMCID: PMC10901895 DOI: 10.1038/s41598-024-54568-x] [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: 10/04/2023] [Accepted: 02/14/2024] [Indexed: 03/01/2024] Open
Abstract
Ophidiomycosis (snake fungal disease) is caused by the fungal pathogen Ophidiomyces ophidiicola, which causes dermal lesions, occasional systemic infections, and in some cases, mortality. To better understand potential conservation implications of ophidiomycosis (i.e., population-level effects), we investigated its impacts on individual fitness in a population of endangered eastern foxsnakes (Pantherophis vulpinus). We tracked 38 foxsnakes over 6 years and quantified body condition, movement patterns, oviposition rates, and survival. Body condition, distance travelled, and oviposition rates were similar between snakes with and without ophidiomycosis. Interestingly, snakes that tested positive for the pathogen travelled farther, suggesting that movement through a greater diversity of habitats increases risk of exposure. Ophidiomycosis did not negatively affect survival, and most apparently infected snakes persisted in a manner comparable to snakes without ophidiomycosis. Only one mortality was directly attributed to ophidiomycosis, although infected snakes were overrepresented in a sample of snakes killed by predators. Overall, our results suggest that ophidiomycosis may have sublethal effects on eastern foxsnakes, but do not suggest direct effects on survival, ovipositioning, or viability of the study population.
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Affiliation(s)
- Rachel M Dillon
- Environmental and Life Sciences Program, Trent University, Peterborough, ON, K9H 7B8, Canada.
- Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources, 2Nd Flr DNA Building, 2140 East Bank Dr., Peterborough, ON, K9L 1Z8, Canada.
- Wildlife Preservation Canada, 5420 Highway 6 North, Guelph, ON, N1H 6J2, Canada.
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada.
| | - James E Paterson
- Environmental and Life Sciences Program, Trent University, Peterborough, ON, K9H 7B8, Canada
- Institute for Wetland and Waterfowl Research, Ducks Unlimited Canada, Stonewall, MB, Canada
| | - Pilar Manorome
- Ontario Parks, Ontario Ministry of Environment, Conservation, and Parks, 300 Water Street, 3Rd Floor S, Peterborough, ON, K9J 8M5, Canada
| | - Kyle Ritchie
- Wildlife Preservation Canada, 5420 Highway 6 North, Guelph, ON, N1H 6J2, Canada
| | - Leonard Shirose
- Department of Pathobiology, University of Guelph, Guelph, ON, N1G 2W1, Canada
- Canadian Wildlife Health Cooperative - Ontario/Nunavut, Guelph, ON, N1G 2W1, Canada
| | - Emily Slavik
- Lake Erie Management Unit, Ontario Ministry of Natural Resources, 320 Milo Road, Wheatley, ON, N0P 2P0, Canada
| | - Christina M Davy
- Environmental and Life Sciences Program, Trent University, Peterborough, ON, K9H 7B8, Canada.
- Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources, 2Nd Flr DNA Building, 2140 East Bank Dr., Peterborough, ON, K9L 1Z8, Canada.
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada.
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Ficetola GF, Manenti R, Lo Parrino E, Muraro M, Barzaghi B, Messina V, Giachello S, Melotto A, Falaschi M. Decline and Extinction of the Italian Agile Frog Rana latastei from Core Areas of Its Range. Animals (Basel) 2023; 13:3187. [PMID: 37893911 PMCID: PMC10603640 DOI: 10.3390/ani13203187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/27/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
Detecting the trends of species and populations is fundamental to identifying taxa with high conservation priority. Unfortunately, long-term monitoring programs are challenging and often lacking. The Italian agile frog Rana latastei is endemic to Northern Italy and adjacent countries, is considered vulnerable by the IUCN, and is protected at the European level. However, quantitative estimates of its decline are extremely scarce. In this study, we document the trends in abundance and distribution of Rana latastei within Monza Park, which currently represents the area closer to the type locality of the species and holds unique genetic features. Wetlands within the park were monitored from 2000 to 2023; counts of egg clutches were taken as a measure of reproductive output and the abundance of breeding females. In 2000, the species occurred over a significant proportion of the park. Total abundance showed strong yearly variation but remained rather constant from 2000 to 2019. However, Rana latastei disappeared from the park around 2021 and was never detected in 2022-2023. The decline is probably related to the joint effect of multiple factors, including the conversion of breeding sites for farming, inappropriate water management, invasive alien species, and severe drought. The local extinction of Rana latastei occurred despite legal protection, highlighting the need for more effective and stringent tools for the conservation of European biodiversity.
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Affiliation(s)
- Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
- University Grenoble Alpes, University Savoie Mont Blanc, CNRS, LECA, Laboratoire d’Écologie Alpine, F-38000 Grenoble, France
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
| | - Elia Lo Parrino
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
| | - Martina Muraro
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
- Department of Biological, Geological and Environmental Sciences, Università di Bologna, Via Irnerio, 42, 40126 Bologna, Italy
| | - Benedetta Barzaghi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
| | - Valeria Messina
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
| | - Simone Giachello
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
- University School for Advanced Studies IUSS Pavia, Piazza della Vittoria 15, 27100 Pavia, Italy
| | - Andrea Melotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
| | - Mattia Falaschi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy; (R.M.); (E.L.P.); (M.M.); (B.B.); (V.M.); (S.G.); (A.M.); (M.F.)
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6
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Brooks GC, Caruso NM, Chandler HC, Haas CA. Niche partitioning and the storage effect facilitate coexistence in an amphibian community. Ecol Evol 2023; 13:e10629. [PMID: 37869435 PMCID: PMC10585123 DOI: 10.1002/ece3.10629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 10/03/2023] [Accepted: 10/06/2023] [Indexed: 10/24/2023] Open
Abstract
Virtually all natural community assemblages are dominated by a handful of common species. Dominant species can exert negative impacts on biodiversity through competitive exclusion, and thus there is a strong incentive to understand imbalances in community composition, changes in dominance hierarchies through time, and mechanisms of coexistence. Pond-breeding amphibians that utilize ephemeral wetlands provide an excellent opportunity to evaluate theoretical predictions of community composition in stochastic environments. One of the most striking features of pond-breeding amphibians is the marked stochastic fluctuations in abundance across years. Given strong theoretical and empirical links between evenness and biomass, one would expect community evenness to change from year to year. Moreover, if different species exhibit different boom-and-bust reproductive cycles, then a storage effect may help to explain why one species does not outcompete all others. Here, we explore the interplay between biotic and abiotic conditions in shaping amphibian communities at two ephemeral wetlands on Eglin Air Force Base, Florida. We document consistent community composition over 6 years of monitoring, resulting from a lack of species turnover and similar responses of all community members to environmental conditions. The similar dynamics of species argues against a storage effect as the sole mechanism for coexistence and instead points to niche partitioning as a more important factor. In support of this conclusion, we show that the degree of synchrony in breeding migrations only correlates with environmental conditions within species, not between species. The lack of pattern seen between species implies that individuals are somewhat constrained in the timing of breeding migrations, perhaps owing in part to competition with other community members. We hope that our work reinvigorates interest in amphibian communities and highlights ephemeral wetlands as model systems to study community dynamics in stochastic environments.
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Affiliation(s)
- George C. Brooks
- Department of Fish and Wildlife ConservationVirginia TechBlacksburgVirginiaUSA
| | - Nicholas M. Caruso
- Department of Fish and Wildlife ConservationVirginia TechBlacksburgVirginiaUSA
| | - Houston C. Chandler
- Department of Fish and Wildlife ConservationVirginia TechBlacksburgVirginiaUSA
- The Orianne SocietyTigerGeorgiaUSA
| | - Carola A. Haas
- Department of Fish and Wildlife ConservationVirginia TechBlacksburgVirginiaUSA
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7
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Artificial Waterholes for European Bison as Biodiversity Hotspots in Forest Ecosystems: Ecological Effects of Species Reintroduction Activities. DIVERSITY 2023. [DOI: 10.3390/d15030446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Abstract
Despite the growing population of European bison (Bison bonasus), it is necessary to plan the reintroduction of these animals to new areas. Reintroduction of European bison often requires the improvement of natural conditions. Such preparatory activities allow European bison to more easily adapt to new places, but also impact the functioning of animals from other taxa. The aim of the presented study was to examine the impact of waterholes for European bison on the development of local populations of amphibians and dragonflies (Odonata), as well as the creation of new feeding grounds for bats. We examined 15 reservoirs in the Augustów Forest District located in northeastern Poland, of which five were waterholes for European bison built in 2013–2014, four were semi-natural reservoirs transformed into waterholes for European bison in 2018, and six were natural reservoirs. Dragonflies were studied in 2021–2022; amphibians in 2018 and 2020; and bats in 2018, 2019, and 2020. In total, 24 species of dragonflies (Odonata), 10 species of amphibians, and 13 species of bats were found. The results of the inventory of three taxonomic groups using different comparative variants indicate a significant impact of the construction of waterholes for European bison on the biodiversity of the forest ecosystem. We concluded that the waterholes for European bison present better resistance to drying out than natural reservoirs. In addition, waterholes warm up more quickly, supporting better conditions for amphibians. The surface of the reservoirs and their exposed surroundings are favorable for insects (including dragonflies), and these are a source of food for bats, becoming attractive feeding grounds for them.
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Messerman AF, Clause AG, Gray LN, Krkošek M, Rollins HB, Trenham PC, Shaffer HB, Searcy CA. Applying stochastic and Bayesian integral projection modeling to amphibian population viability analysis. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2783. [PMID: 36478484 DOI: 10.1002/eap.2783] [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: 03/14/2022] [Revised: 08/08/2022] [Accepted: 10/17/2022] [Indexed: 06/17/2023]
Abstract
Integral projection models (IPMs) can estimate the population dynamics of species for which both discrete life stages and continuous variables influence demographic rates. Stochastic IPMs for imperiled species, in turn, can facilitate population viability analyses (PVAs) to guide conservation decision-making. Biphasic amphibians are globally distributed, often highly imperiled, and ecologically well suited to the IPM approach. Herein, we present a stochastic size- and stage-structured IPM for a biphasic amphibian, the U.S. federally threatened California tiger salamander (CTS) (Ambystoma californiense). This Bayesian model reveals that CTS population dynamics show greatest elasticity to changes in juvenile and metamorph growth and that populations are likely to experience rapid growth at low density. We integrated this IPM with climatic drivers of CTS demography to develop a PVA and examined CTS extinction risk under the primary threats of habitat loss and climate change. The PVA indicated that long-term viability is possible with surprisingly high (20%-50%) terrestrial mortality but simultaneously identified likely minimum terrestrial buffer requirements of 600-1000 m while accounting for numerous parameter uncertainties through the Bayesian framework. These analyses underscore the value of stochastic and Bayesian IPMs for understanding both climate-dependent taxa and those with cryptic life histories (e.g., biphasic amphibians) in service of ecological discovery and biodiversity conservation. In addition to providing guidance for CTS recovery, the contributed IPM and PVA supply a framework for applying these tools to investigations of ecologically similar species.
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Affiliation(s)
| | - Adam G Clause
- Urban Nature Research Center & Department of Herpetology, Natural History Museum of Los Angeles County, Los Angeles, California, USA
| | - Levi N Gray
- Department of Biological Sciences, University of Buffalo, Buffalo, New York, USA
| | - Martin Krkošek
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
| | - Hilary B Rollins
- Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Peter C Trenham
- Department of Biology, Pennsylvania State University, State College, Pennsylvania, USA
| | - H Bradley Shaffer
- Department of Ecology and Evolutionary Biology, La Kretz Center for California Conservation Science, and Institute of the Environment and Sustainability, University of California, Los Angeles, California, USA
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Barrows CW, Heacox SA, Sweet LC. FLAT-TAILED HORNED LIZARDS—20 YEARS OF RESEARCH AT THE NORTHWESTERN EDGE OF THEIR RANGE. SOUTHWEST NAT 2022. [DOI: 10.1894/0038-4909-66.4.309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Cameron W. Barrows
- University of California Riverside–Palm Desert Center, Center for Conservation Biology, 75-080 Frank Sinatra Drive, Palm Desert, CA 92211
| | - Scott A. Heacox
- University of California Riverside–Palm Desert Center, Center for Conservation Biology, 75-080 Frank Sinatra Drive, Palm Desert, CA 92211
| | - Lynn C. Sweet
- University of California Riverside–Palm Desert Center, Center for Conservation Biology, 75-080 Frank Sinatra Drive, Palm Desert, CA 92211
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Caballero-Díaz C, Sánchez-Montes G, Gómez I, Díaz-Zúñiga A, Martínez-Solano Í. Artificialwater bodies as amphibian breeding sites: the case of the common midwife toad (Alytes obstetricans) in central Spain. AMPHIBIA-REPTILIA 2022. [DOI: 10.1163/15685381-bja10115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Natural breeding sites for amphibians are decreasing in quantity and quality in temperate regions, resulting in local extinctions and increasing population fragmentation. Artificial water bodies (e.g., water tanks or cattle troughs) can represent suitable reproductive habitats for some amphibians, but demographic data are required to assess this assumption. We evaluated the role of artificial water bodies in the persistence of a species of population concern, the common midwife toad, Alytes obstetricans (Laurenti, 1768), at local and regional scales. We surveyed 275 water bodies to characterize the distribution of the species and detected 63 breeding populations of A. obstetricans where we estimated larval abundance. In addition, we monitored two populations for three consecutive breeding seasons using capture-mark-recapture methods based on photo-identification, assessing abundance, breeding success and the use of space of adult individuals captured on multiple occasions. Our results show that artificial sites are preferentially used as breeding sites in the region compared to natural aquatic habitats, providing key habitat for the species and hosting much larger numbers and densities of larvae than natural sites. At local scale, populations of A. obstetricans in artificial sites were abundant and characterized by high male breeding success. However, adults are spatially aggregated around breeding sites, with small home ranges, implying high vulnerability to population fragmentation. Our results suggest artificial breeding sites can sustain viable populations of A. obstetricans, provided measures promoting connectivity among breeding nuclei are considered.
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Affiliation(s)
- Carlos Caballero-Díaz
- Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
- Departamento de Biología, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
- Asociación Herpetológica Española, Apartado de Correos 191, 28911 Leganés, Madrid, Spain
| | - Gregorio Sánchez-Montes
- Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Iván Gómez
- Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Ana Díaz-Zúñiga
- Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Íñigo Martínez-Solano
- Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
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11
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Chiacchio M, Mazoschek L, Vershinin V, Berzin D, Partel P, Henle K, Grimm‐Seyfarth A. Distant but similar: Simultaneous drop in the abundance of three independent amphibian communities. CONSERVATION SCIENCE AND PRACTICE 2022. [DOI: 10.1111/csp2.12835] [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
Affiliation(s)
- Michele Chiacchio
- Department of Conservation Biology and Social‐Ecological Systems UFZ—Helmholtz Centre for Environmental Research Leipzig Germany
- Herpetology Section Zoological Research Museum Alexander Koenig Bonn Germany
| | - Linda Mazoschek
- Department of Conservation Biology and Social‐Ecological Systems UFZ—Helmholtz Centre for Environmental Research Leipzig Germany
| | - Vladimir Vershinin
- Institute of Plant and Animal Ecology Ural Branch of the Russian Academy of Sciences Yekaterinburg Russia
- Institute of Natural Sciences and Mathematics Eltsyn Ural Federal University Yekaterinburg Russia
| | - Dmitry Berzin
- Institute of Plant and Animal Ecology Ural Branch of the Russian Academy of Sciences Yekaterinburg Russia
| | - Piergiovanni Partel
- Parco Naturale Paneveggio‐Pale di San Martino Primiero San Martino di Castrozza Italy
| | - Klaus Henle
- Department of Conservation Biology and Social‐Ecological Systems UFZ—Helmholtz Centre for Environmental Research Leipzig Germany
| | - Annegret Grimm‐Seyfarth
- Department of Conservation Biology and Social‐Ecological Systems UFZ—Helmholtz Centre for Environmental Research Leipzig Germany
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12
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Crawford BA, Maerz JC, Terrell VC, Moore CT. Population viability analysis for a pond-breeding amphibian under future drought scenarios in the southeastern United States. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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13
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Goldingay RL, McHugh D, Parkyn JL. Multiyear monitoring of threatened iconic arboreal mammals in a mid‐elevation conservation reserve in eastern Australia. Ecol Evol 2022; 12:e8935. [PMID: 35646314 PMCID: PMC9130560 DOI: 10.1002/ece3.8935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/25/2022] [Indexed: 12/02/2022] Open
Abstract
Multiyear investigations of population dynamics are fundamental to threatened species conservation. We used multiseason occupancy based on spotlight surveys to investigate dynamic occupancy of the koala and the greater glider over an 8‐year period that encompassed a severe drought in year 6. We combined our occupancy estimates with literature estimates of density to estimate the population sizes of these species within the focal conservation reserve. Both species showed substantial yearly variation in the probability of detection (koala: 0.13–0.24; greater glider: 0.12–0.36). Detection of the koala did not follow any obvious pattern. Low detection of the greater glider coincided with the drought and two subsequent years. We suggest the low detection reflected a decline in abundance. The probability of occupancy of the koala was estimated to be 0.88 (95% CI: 0.75–1.0) in year 8. Autonomous recording units were also used in year 8, enabling an independent occupancy estimate of 0.80 (0.64–0.90). We found no evidence of a drought‐induced decline in the koala. Habitat variables had a weak influence on koala occupancy probabilities. The probability of occupancy of the greater glider changed little over time, from 0.52 (95% CI: 0.24–0.81) to 0.63 (0.42–0.85) in year 8. Modeling suggested that the probability of colonization was positively influenced by the percentage cover of rainforest. Increased cover of these nonbrowse trees may reflect thermal buffering, site productivity, or soil moisture. We estimate that our study reserve is likely to contain >900 adult koalas and >2400 adult greater gliders. These are among some of the first reserve‐wide estimates for these species. Our study reserve can play an important role in the conservation of both species.
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Affiliation(s)
- Ross L. Goldingay
- Faculty of Science Southern Cross University Lismore New South Wales Australia
| | - Darren McHugh
- Faculty of Science Southern Cross University Lismore New South Wales Australia
| | - Jonathan L. Parkyn
- Faculty of Science Southern Cross University Lismore New South Wales Australia
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14
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Long-Term Changes in Four Populations of the Spiny Toad, Bufo spinosus, in Western France; Data from Road Mortalities. CONSERVATION 2022. [DOI: 10.3390/conservation2020017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Habitat fragmentation is widely recognized as a contributor to the decline of biodiversity, with amphibians one of the key groups impacted. To understand the effects of habitat fragmentation on amphibian populations requires long-term data sets showing population trends. In this paper, road mortalities were employed as proxies to describe long-term numbers of four populations of the spiny toad Bufo spinosus in western France during a 17-year period. Road mortalities were found during all months in all populations but were most frequent during October, November and December, the main migratory period. Large females were found significantly more frequently during these migration months, forming 45% of the total sample, compared with their presence from January to September (34.4%). The long-term trends were evaluated using regression analysis of the logarithmic (loge) transforms of annual counts as dependent variables against year as the independent variables. All coefficients showed no significant departure from the 0 hypothetical coefficients, indicative of population stability. This was supported by jackknife analysis, which showed good agreement of the pseudo-regression coefficients with the true equations. Stepwise regression of potential climate impacts on toad numbers suggested rainfall levels in October adjusted to 2- and 3-year lags were involved in driving population change. Road mortality counts were also made during 2020 and 2021 when human movement restrictions were in place due to the COVID-19 pandemic. To estimate the potential impact on this disturbance in the methodology, the Poisson distribution was used to estimate potential differences between what would have been expected counts and the observed counts. The results indicate that the observed mortalities were significantly lower than expected in all four populations.
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15
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Kross CS, Willson JD. Land‐use alters the form of larval density dependence to increase extinction risk in a grassland amphibian. Anim Conserv 2022. [DOI: 10.1111/acv.12782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. S. Kross
- University of Arkansas Fayetteville Arkansas USA
- Stephen A. Forbes Biological Station Havana Illinois USA
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16
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Chambert T, Backlin AR, Gallegos E, Baskerville‐Bridges B, Fisher RN. Defining relevant conservation targets for the endangered Southern California distinct population segment of the mountain yellow‐legged frog (
Rana muscosa
). CONSERVATION SCIENCE AND PRACTICE 2022. [DOI: 10.1111/csp2.12666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
| | - Adam R. Backlin
- U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station San Diego California USA
| | - Elizabeth Gallegos
- U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station San Diego California USA
| | | | - Robert N. Fisher
- U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station San Diego California USA
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17
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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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18
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Perelman ZE, Takahashi MK, Hundermark EL, Parenzan C. An eDNA-Based Assessment of the Impact of a 207,000-Liter Gasoline Spill on Local Populations of Eastern Hellbenders (Cryptobranchus alleganiensis alleganiensis), an Imperiled Giant Salamander. Northeast Nat (Steuben) 2021. [DOI: 10.1656/045.028.0406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
| | | | | | - Carol Parenzan
- (Former) Middle Susquehanna Riverkeeper, Sunbury, PA 17801
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19
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LeClair G, Chatfield MWH, Wood Z, Parmelee J, Frederick CA. Influence of the COVID-19 pandemic on amphibian road mortality. CONSERVATION SCIENCE AND PRACTICE 2021; 3:e535. [PMID: 34901774 PMCID: PMC8646393 DOI: 10.1111/csp2.535] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 08/27/2021] [Accepted: 09/01/2021] [Indexed: 12/01/2022] Open
Abstract
The COVID-19 pandemic and its related human activity shutdowns provide unique opportunities for biodiversity monitoring through what has been termed the "anthropause" or the "great human confinement experiment." The pandemic caused immense disruption to human activity in the northeastern United States in the spring of 2020, with notable reductions in traffic levels. These shutdowns coincided with the seasonal migration of adult amphibians, which are typically subject to intense vehicle-impact mortality. Using data collected as part of an annual community science monitoring program in Maine from 2018 to 2021, we examined how amphibian mortality probabilities responded to reductions in traffic during the pandemic. While we detected a 50% decline for all amphibians, this was driven entirely by reductions in frog mortality. Wildlife collision data from the Maine Department of Transportation on other wildlife species support our finding of drastic declines in wildlife road mortality in spring 2020 when compared with immediately previous and subsequent years. Additionally, we find that frogs suffer significantly higher road mortality than salamanders, particularly when conditions are warmer and wetter.
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Affiliation(s)
- Gregory LeClair
- School of Biology and EcologyUniversity of Maine SystemOronoMaineUSA
| | | | - Zachary Wood
- School of Biology and EcologyUniversity of Maine SystemOronoMaineUSA
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20
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Moss WE, McDevitt-Galles T, Muths E, Bobzien S, Purificato J, Johnson PTJ. Resilience of native amphibian communities following catastrophic drought: Evidence from a decade of regional-scale monitoring. BIOLOGICAL CONSERVATION 2021; 263:109352. [PMID: 34737459 PMCID: PMC8562680 DOI: 10.1016/j.biocon.2021.109352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The increasing frequency and severity of drought may exacerbate ongoing global amphibian declines. However, interactions between drought and coincident stressors, coupled with high interannual variability in amphibian abundances, can mask the extent and underlying mechanisms of drought impacts. We synthesized a decade (2009 - 2019) of regional-scale amphibian monitoring data (2273 surveys, 233 ponds, and seven species) from across California's Bay Area and used dynamic occupancy modeling to estimate trends and drivers of species occupancy. An extreme drought during the study period resulted in substantial habitat loss, with 51% of ponds drying in the worst year of drought, compared to <20% in pre-drought years. Nearly every species exhibited reduced breeding activity during the drought, with the occupancy of some species (American bullfrogs and California newts) declining by >25%. Invasive fishes and bullfrogs were also associated with reduced amphibian occupancy, and these taxa were locally extirpated from numerous sites during drought, without subsequent recovery-suggesting that drought may present an opportunity to remove invaders. Despite a historic, multi-year drought, native amphibians rebounded quickly to pre-drought occupancy levels, demonstrating evidence of resilience. Permanent waterbodies supported higher persistence of native species during drought years than did temporary waterbodies, and we therefore highlight the value of hydroperiod diversity in promoting amphibian stability.
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Affiliation(s)
- Wynne E. Moss
- University of Colorado, Department of Ecology & Evolutionary Biology, Boulder, CO
- Conservation Science Partners, Inc. Fort Collins, CO
| | | | - Erin Muths
- U.S. Geological Survey, Fort Collins Science Center, Fort Collins, CO
| | | | | | - Pieter T. J. Johnson
- University of Colorado, Department of Ecology & Evolutionary Biology, Boulder, CO
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21
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Charlie-Silva I, Araújo APC, Guimarães ATB, Veras FP, Braz HLB, de Pontes LG, Jorge RJB, Belo MAA, Fernandes BHV, Nóbrega RH, Galdino G, Condino-Neto A, Galindo-Villegas J, Machado-Santelli GM, Sanches PRS, Rezende RM, Cilli EM, Malafaia G. Toxicological insights of Spike fragments SARS-CoV-2 by exposure environment: A threat to aquatic health? JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126463. [PMID: 34216962 PMCID: PMC8226002 DOI: 10.1016/j.jhazmat.2021.126463] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 05/26/2021] [Accepted: 06/21/2021] [Indexed: 05/06/2023]
Abstract
The Spike protein (S protein) is a critical component in the infection of the new coronavirus (SARS-CoV-2). The objective of this work was to evaluate whether peptides from S protein could cause negative impact in the aquatic animals. The aquatic toxicity of SARS-CoV-2 Spike protein peptides derivatives has been evaluated in tadpoles (n = 50 tadpoles/5 replicates of 10 animals) from species Physalaemus cuvieri (Leptodactylidae). After synthesis, purification, and characterization of peptides (PSDP2001, PSDP2002, PSDP2003) an aquatic contamination has been simulated with these peptides during 24 h of exposure in two concentrations (100 and 500 ng/mL). The control group ("C") was composed of tadpoles kept in polyethylene containers containing de-chlorinated water. Oxidative stress, antioxidant biomarkers and AChE activity were assessed. In both concentrations, PSPD2002 and PSPD2003 increased catalase and superoxide dismutase antioxidants enzymes activities, as well as oxidative stress (nitrite levels, hydrogen peroxide and reactive oxygen species). All three peptides also increased acetylcholinesterase activity in the highest concentration. These peptides showed molecular interactions in silico with acetylcholinesterase and antioxidant enzymes. Aquatic particle contamination of SARS-CoV-2 has cholinesterasic effect in P. cuvieri tadpoles. These findings indicate that the COVID-19 can constitute environmental impact or biological damage potential.
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Affiliation(s)
- Ives Charlie-Silva
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Amanda P C Araújo
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil
| | - Abraão T B Guimarães
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil
| | - Flávio P Veras
- Center of Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Helyson L B Braz
- Postgraduate Program in Morphological Science, Department of Morphology, School of Medicine, Federal University of Ceara, Delmiro de Farias St., 60.430-170 Fortaleza, CE, Brazil
| | - Letícia G de Pontes
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Roberta J B Jorge
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceara, Coronel Nunes de Melo St., 1127, 60.430-275 Fortaleza, CE, Brazil; Drug Research and Development Center, Federal University of Ceara, Coronel Nunes de Melo St., 1000, 60.430-275 Fortaleza, CE, Brazil
| | - Marco A A Belo
- Laboratory of Animal Pharmacology and Toxicology, Brazil University, Descalvado, SP, Brazil; Department of Preventive Veterinary Medicine, São Paulo State University (UNESP), Jaboticabal, SP, Brazil
| | - Bianca H V Fernandes
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Rafael H Nóbrega
- Reproductive and Molecular Biology Group, Institute of Biosciences, São Paulo State University, Botucatu, SP, Brazil
| | - Giovane Galdino
- Institute of Motricity Sciences, Federal University of Alfenas, Alfenas, MG, Brazil
| | - Antônio Condino-Neto
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | | | | | - Paulo R S Sanches
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara SP, Brazil
| | - Rafael M Rezende
- Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, United States
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara SP, Brazil
| | - Guilherme Malafaia
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil.
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22
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MacLaren AR, Crump PS, Forstner MRJ. Optimizing the power of human performed audio surveys for monitoring the endangered Houston toad using automated recording devices. PeerJ 2021; 9:e11935. [PMID: 34434662 PMCID: PMC8351579 DOI: 10.7717/peerj.11935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 07/19/2021] [Indexed: 11/29/2022] Open
Abstract
Knowledge regarding the locations of populations of endangered species is a critical part of recovery and facilitates land use planning that avoids unnecessary impacts. Regulatory agencies often support the development of survey guidelines designed to standardize the methods and maximize the probability of detection, thereby avoiding incorrectly concluding a species is absent from a site. Here, using simulations with data collected using automated recording devices (ARDs) we evaluated the efficacy of the existing U.S. Fish and Wildlife Service’s survey requirements for the endangered Houston Toad (Anaxyrus houstonensis). We explored the effect of (1) increasing survey duration, (2) increasing the number of surveys, and (3) combinations of environmental conditions (e.g., temperature, humidity, rainfall) on the detection probability and the number of surveys needed to be 95% confident of absence. We found that increases in both the duration of the survey and the number of surveys conducted decreased the likelihood of incorrectly concluding the species was absent from the site, and that the number of surveys required to be 95% confident greatly exceeded the existing survey requirements. Targeting specific environmental conditions was also an effective way to decrease the number of surveys required but the infrequency in which these conditions occurred might make application difficult in some years. Overall, we suggest that the survey effort necessary to achieve confidence in the absence of Houston Toads at a site is more practically achievable with the use of ARDs, but this may not be suitable in all monitoring scenarios.
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Affiliation(s)
- Andrew R MacLaren
- Department of Biology, Texas State University, San Marcos, TX, United States of America.,Cambrian Environmental, Austin, TX, United States of America
| | - Paul S Crump
- Department of Biology, Texas State University, San Marcos, TX, United States of America.,Nongame and Rare Species Program, Texas Parks and Wildlife Department, Austin, TX, United States of America
| | - Michael R J Forstner
- Department of Biology, Texas State University, San Marcos, TX, United States of America
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23
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Rowe JC, Duarte A, Pearl CA, McCreary B, Haggerty PK, Jones JW, Adams MJ. Demography of the Oregon spotted frog along a hydrologically modified river. Ecosphere 2021. [DOI: 10.1002/ecs2.3634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Jennifer C. Rowe
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon97331USA
| | - Adam Duarte
- USDA Forest Service, Pacific Northwest Research Station 3625 93rd Avenue SW Olympia Washington98512USA
- Department of Fisheries and Wildlife Oregon State University 104 Nash Hall Corvallis Oregon97331USA
| | - Christopher A. Pearl
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon97331USA
| | - Brome McCreary
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon97331USA
| | - Patricia K. Haggerty
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon97331USA
| | - John W. Jones
- Hydrologic Remote Sensing Branch U.S. Geological Survey 11649 Leetown Road Kearneysville West Virginia25430USA
| | - Michael J. Adams
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon97331USA
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24
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Hughes DF, Green ML, Warner JK, Davidson PC. Evaluating Exclusion Barriers for Treefrogs in Agricultural Landscapes. WILDLIFE SOC B 2021. [DOI: 10.1002/wsb.1168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniel F. Hughes
- Department of Biology Coe College 1220 1st Avenue NE Cedar Rapids IA 52402 USA
| | - Michelle L. Green
- Department of Biological Sciences University of South Florida Saint Petersburg 140 7th Avenue South Saint Petersburg FL 33701 USA
| | - Jonathan K. Warner
- Texas Parks & Wildlife Department 10 Parks and Wildlife Drive Port Arthur TX 77640 USA
| | - Paul C. Davidson
- Department of Agricultural and Biological Engineering University of Illinois Urbana‐Champaign 1304 West Pennsylvania Avenue Urbana IL 61801 USA
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25
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Mentges A, Blowes SA, Hodapp D, Hillebrand H, Chase JM. Effects of site-selection bias on estimates of biodiversity change. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2021; 35:688-698. [PMID: 32808693 DOI: 10.1111/cobi.13610] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
Estimates of biodiversity change are essential for the management and conservation of ecosystems. Accurate estimates rely on selecting representative sites, but monitoring often focuses on sites of special interest. How such site-selection biases influence estimates of biodiversity change is largely unknown. Site-selection bias potentially occurs across four major sources of biodiversity data, decreasing in likelihood from citizen science, museums, national park monitoring, and academic research. We defined site-selection bias as a preference for sites that are either densely populated (i.e., abundance bias) or species rich (i.e., richness bias). We simulated biodiversity change in a virtual landscape and tracked the observed biodiversity at a sampled site. The site was selected either randomly or with a site-selection bias. We used a simple spatially resolved, individual-based model to predict the movement or dispersal of individuals in and out of the chosen sampling site. Site-selection bias exaggerated estimates of biodiversity loss in sites selected with a bias by on average 300-400% compared with randomly selected sites. Based on our simulations, site-selection bias resulted in positive trends being estimated as negative trends: richness increase was estimated as 0.1 in randomly selected sites, whereas sites selected with a bias showed a richness change of -0.1 to -0.2 on average. Thus, site-selection bias may falsely indicate decreases in biodiversity. We varied sampling design and characteristics of the species and found that site-selection biases were strongest in short time series, for small grains, organisms with low dispersal ability, large regional species pools, and strong spatial aggregation. Based on these findings, to minimize site-selection bias, we recommend use of systematic site-selection schemes; maximizing sampling area; calculating biodiversity measures cumulatively across plots; and use of biodiversity measures that are less sensitive to rare species, such as the effective number of species. Awareness of the potential impact of site-selection bias is needed for biodiversity monitoring, the design of new studies on biodiversity change, and the interpretation of existing data.
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Affiliation(s)
- Andrea Mentges
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Institute of Computer Science, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, Halle (Saale), 06120, Germany
- Leipzig University, Augustusplatz 10, Leipzig, 04109
| | - Shane A Blowes
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Institute of Computer Science, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, Halle (Saale), 06120, Germany
| | - Dorothee Hodapp
- Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Ammerländer Heerstraße 231, Oldenburg, 26129, Germany
- Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI), Am Handelshafen 12, Bremerhaven, 27570, Germany
| | - Helmut Hillebrand
- Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Ammerländer Heerstraße 231, Oldenburg, 26129, Germany
- Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI), Am Handelshafen 12, Bremerhaven, 27570, Germany
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstraße 1, Wilhelmshaven, 26382, Germany
| | - Jonathan M Chase
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Institute of Computer Science, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, Halle (Saale), 06120, Germany
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26
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Ennen JR, Cecala KK, Gould P, Colvin R, Denison J, Garig DF, Hyder S, Recker L, Davenport JM. Size Matters: the Influence of Trap and Mesh Size on Turtle Captures. WILDLIFE SOC B 2021. [DOI: 10.1002/wsb.1163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joshua R. Ennen
- Tennessee Aquarium Conservation Institute 175 Baylor School Rd Chattanooga TN 37377 USA
| | - Kristen K. Cecala
- Department of Biology University of the South, 735 University Ave. Sewanee TN 37383 USA
| | - Philip Gould
- School of Environment and Natural Resources Ohio State University 2021 Coffey Rd Columbus OH 43210 USA
| | - Robert Colvin
- Tennessee Wildlife Resources Agency Region I, 200 Lowell Thomas Drive Jackson TN 38301 USA
| | - Jeremy Denison
- Tennessee Wildlife Resources Agency Region I, 200 Lowell Thomas Drive Jackson TN 38301 USA
| | - Dustin F. Garig
- Department of Biology, Southeast Missouri State University One University Plaza, MS 6200 Cape Girardeau Missouri 63701 USA
| | - Saidee Hyder
- Department of Biology, Southeast Missouri State University One University Plaza, MS 6200 Cape Girardeau Missouri 63701 USA
| | - Lewis Recker
- Department of Biology, Southeast Missouri State University One University Plaza, MS 6200 Cape Girardeau Missouri 63701 USA
| | - Jon M. Davenport
- Department of Biology, Southeast Missouri State University One University Plaza, MS 6200 Cape Girardeau Missouri 63701 USA
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27
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28
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Density Dependence and Adult Survival Drive Dynamics in Two High Elevation Amphibian Populations. DIVERSITY 2020. [DOI: 10.3390/d12120478] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Amphibian conservation has progressed from the identification of declines to mitigation, but efforts are hampered by the lack of nuanced information about the effects of environmental characteristics and stressors on mechanistic processes of population regulation. Challenges include a paucity of long-term data and scant information about the relative roles of extrinsic (e.g., weather) and intrinsic (e.g., density dependence) factors. We used a Bayesian formulation of an open population capture-recapture model and >30 years of data to examine intrinsic and extrinsic factors regulating two adult boreal chorus frogs (Pseudacris maculata) populations. We modelled population growth rate and apparent survival directly, assessed their temporal variability, and derived estimates of recruitment. Populations were relatively stable (geometric mean population growth rate >1) and regulated by negative density dependence (i.e., higher population sizes reduced population growth rate). In the smaller population, density dependence also acted on adult survival. In the larger population, higher population growth was associated with warmer autumns. Survival estimates ranged from 0.30–0.87, per-capita recruitment was <1 in most years, and mean seniority probability was >0.50, suggesting adult survival is more important to population growth than recruitment. Our analysis indicates density dependence is a primary driver of population dynamics for P. maculata adults.
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29
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Brown C, Keung NC, Dillingham CP, Mussulman S, Bushell J, Sollmann R, Todd BD, Lawler SP. Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams. HERPETOLOGICA 2020. [DOI: 10.1655/0018-0831-76.4.383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Cathy Brown
- USDA Forest Service, Stanislaus National Forest, 19777 Greenley Rd., Sonora, CA 95370, USA
| | - Neil C. Keung
- University of California, Center for Watershed Sciences, 425 La Rue Road, Davis, CA 95616, USA
| | - Colin P. Dillingham
- USDA Forest Service, Plumas National Forest, 39696 Highway 70, Quincy, CA 95971, USA
| | - Sarah Mussulman
- California Department of Fish and Wildlife, 1701 Nimbus Road, Rancho Cordova, CA 95670, USA
| | - Jessie Bushell
- San Francisco Zoological Society, 1 Zoo Road, San Francisco, CA 94132, USA
| | - Rahel Sollmann
- University of California, Department of Wildlife, Fish, and Conservation Biology, One Shields Avenue, Davis, CA 95616, USA
| | - Brian D. Todd
- University of California, Department of Wildlife, Fish, and Conservation Biology, One Shields Avenue, Davis, CA 95616, USA
| | - Sharon P. Lawler
- University of California, Department of Entomology and Nematology, One Shields Avenue, Davis, CA 95616, USA
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30
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Stiles RM, Terrell VCK, Maerz JC, Lannoo MJ. Density-Dependent Fitness Attributes and Carry-Over Effects in Crawfish Frogs (Rana areolata), a Species of Conservation Concern. COPEIA 2020. [DOI: 10.1643/ch-19-246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Rochelle M. Stiles
- San Francisco Zoological Society, 1 Zoo Road, San Francisco, California 94132; . Send reprint requests to this address
| | - Vanessa C. K. Terrell
- Warnell School of Forestry and Natural Resources, University of Georgia, 180 East Green Street, Athens, Georgia 30602; (VCKT) ; and (JCM)
| | - John C. Maerz
- Warnell School of Forestry and Natural Resources, University of Georgia, 180 East Green Street, Athens, Georgia 30602; (VCKT) ; and (JCM)
| | - Michael J. Lannoo
- Indiana University School of Medicine–TH, 620 Chestnut Street, Terre Haute, Indiana 47809;
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31
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Olarte Ó, SÁnchez-Montes G, MartÍnez-Solano Í. Integrative demographic study of the Iberian painted frog (Discoglossus galganoi): inter-annual variation in the effective to census population size ratio, with insights on mating system and breeding success. Integr Zool 2020; 15:498-510. [PMID: 32333629 DOI: 10.1111/1749-4877.12452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In the face of worldwide amphibian declines, integrative studies combining individual-based information and genetic data represent a powerful approach to produce robust, reliable, and comparable assessments of demographic dynamics. The Iberian painted frog (Discoglossus galganoi) is endemic to Spain and Portugal and shows decreasing population trends across its range, but few studies have attempted to estimate census sizes or assess genetic diversity in wild populations, and little is known about their reproductive biology. We applied an integrative approach based on the combination of capture-mark-recapture data and multilocus genotypes to monitor a breeding population of D. galganoi in central Spain during two consecutive breeding seasons, focusing on the estimation of demographic parameters and their temporal variation. Specifically, we estimated the number of adults (Na ), the effective population size (Ne ), and the effective number of breeders (Nb ), as well as survival and migration rates. We documented a >50% decrease in the estimated number of adults of both sexes between the breeding seasons of 2018 and 2019, probably associated with reduced rainfall in the latter. Estimates of Nb and the Nb /Na ratio were low in both seasons, with a 20-30% decrease in Nb and a 47% increase in the Nb /Na ratio in 2019. Based on the reconstruction of pedigrees from larval and adult genotypes, we provide the first genetic evidence of polygamy in males and females of D. galganoi and the first estimates of breeding success in the species.
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Affiliation(s)
- Óscar Olarte
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (CSIC), c/ José Gutiérrez Abascal 2, Madrid, 28006, Spain
| | - Gregorio SÁnchez-Montes
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (CSIC), c/ José Gutiérrez Abascal 2, Madrid, 28006, Spain
| | - Íñigo MartÍnez-Solano
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (CSIC), c/ José Gutiérrez Abascal 2, Madrid, 28006, Spain
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32
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Campbell Grant EH, Miller DA, Muths E. A Synthesis of Evidence of Drivers of Amphibian Declines. HERPETOLOGICA 2020. [DOI: 10.1655/0018-0831-76.2.101] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
| | - David A.W. Miller
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA 16802, USA
| | - Erin Muths
- U.S. Geological Survey, Fort Collins Science Center, Fort Collins, CO 80526, USA
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33
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34
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Liebgold EB, Carleton KL. The Right Light: Tiger Salamander Capture Rates and Spectral Sensitivity. WILDLIFE SOC B 2020. [DOI: 10.1002/wsb.1058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eric B. Liebgold
- Department of Biological SciencesSalisbury University Salisbury MD 21801 USA
| | - Karen L. Carleton
- Department of BiologyUniversity of Maryland College Park MD 20742 USA
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35
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Crockett JG, Bailey LL, Muths E. Highly variable rates of survival to metamorphosis in wild boreal toads (
Anaxyrus boreas boreas
). POPUL ECOL 2020. [DOI: 10.1002/1438-390x.12044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- John G. Crockett
- Department of Fish, Wildlife, and Conservation Biology Colorado State University Fort Collins Colorado
| | - Larissa L. Bailey
- Department of Fish, Wildlife, and Conservation Biology Colorado State University Fort Collins Colorado
| | - Erin Muths
- United States Geological Survey Fort Collins Science Center Fort Collins Colorado
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36
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Fournier AMV, White ER, Heard SB. Site-selection bias and apparent population declines in long-term studies. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2019; 33:1370-1379. [PMID: 31210365 DOI: 10.1111/cobi.13371] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/22/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
Detecting population declines is a critical task for conservation biology. Logistical difficulties and the spatiotemporal variability of populations make estimation of population declines difficult. For statistical reasons, estimates of population decline may be biased when study sites are chosen based on abundance of the focal species. In this situation, apparent population declines are likely to be detected even if there is no decline. This site-selection bias is mentioned in the literature but is not well known. We used simulations and real population data to examine the effects of site-selection biases on inferences about population trends. We used a left-censoring method to detect population-size patterns consistent with site-selection bias. The site-selection bias is an important consideration for conservation biologists, and we offer suggestions for minimizing or mitigating it in study design and analysis. Article impact statement: Estimates of population declines are biased if studies begin in large populations, and time-series data show a signature of such an effect.
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Affiliation(s)
- Auriel M V Fournier
- Coastal Research and Extension Center, Mississippi State University, 1815 Popp's Ferry Road, Biloxi, MS, 39532, U.S.A
| | - Easton R White
- Center for Population Biology, University of California, One Shields Avenue, Davis, CA, 95616, U.S.A
| | - Stephen B Heard
- Department of Biology, University of New Brunswick, P.O. Box 4400, Fredericton, NB, E3B 5A3, Canada
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37
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Fang YH, Gao Y, Yang Y, Tan K, Li YP, Ren GP, Huang ZP, Cui LW, Xiao W. Effects of reflective warning markers on wildlife. PeerJ 2019; 7:e7614. [PMID: 31534852 PMCID: PMC6730532 DOI: 10.7717/peerj.7614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 08/05/2019] [Indexed: 11/20/2022] Open
Abstract
Light pollution has become one of the top issues in environmental pollution, especially concerning how secondary light pollution, such as from traffic reflective materials, influences animal distribution and behavior. In this study, 15 camera traps were set up at sites with or without reflective warning markers (RWM) in coniferous forests on Cangshan Mountain located in Dali Prefecture, China. The results showed that the number of independent photographs and species at sites without RWMs were significantly higher than those at sites with RWMs. Significant differences were found between daytime and nighttime composition of bird species and non-flying mammals between two sites. This study found that RWMs had negative effects on wildlife, with the avoidance response of birds to RWMs being more obvious than that of animals at daytime. It is recommended that the use of reflective materials be carefully considered, especially in protected areas.
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Affiliation(s)
- Yi-Hao Fang
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China.,Faculty of Biodiversity Conservation and Utilization, Southwest Forestry University, Kunming, Yunnan, China
| | - Ying Gao
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China.,Faculty of Biodiversity Conservation and Utilization, Southwest Forestry University, Kunming, Yunnan, China
| | - Yin Yang
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China.,School of Archaeology & Anthropology, Australian National University, Canberra, Australia
| | - Kun Tan
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China
| | - Yan-Peng Li
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China
| | - Guo-Peng Ren
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China
| | - Zhi-Pang Huang
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China
| | - Liang-Wei Cui
- Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China.,Faculty of Biodiversity Conservation and Utilization, Southwest Forestry University, Kunming, Yunnan, China
| | - Wen Xiao
- Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan, China.,Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali University, Dali, Yunnan, China.,The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali University, Dali, Yunnan, China.,The Key Laboratory of Yunnan Education Department on Er'hai Catchment Conservation and Sustainable Development, Dali University, Dali, Yunnan, China
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38
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Kirk MA, Galatowitsch ML, Wissinger SA. Seasonal differences in climate change explain a lack of multi-decadal shifts in population characteristics of a pond breeding salamander. PLoS One 2019; 14:e0222097. [PMID: 31491025 PMCID: PMC6730874 DOI: 10.1371/journal.pone.0222097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 08/21/2019] [Indexed: 11/18/2022] Open
Abstract
There is considerable variation among studies that evaluate how amphibian populations respond to global climate change. We used 23 years of annual survey data to test whether changes in climate have caused predictable shifts in the phenology and population characteristics of adult spotted salamanders (Ambystoma maculatum) during spring breeding migrations. Although we observed year-to-year correlation between seasonal climate variables and salamander population characteristics, there have not been long-term, directional shifts in phenological or population characteristics. Warm winters consistently resulted in early migration dates, but across the 23-year study, there was no overall shift towards warmer winters and thus no advanced migration timing. Warm summers and low variability in summer temperatures were correlated with large salamander body sizes, yet an overall shift towards increasing body sizes was not observed despite rising summer temperatures during the study. This was likely due to the absence of long-term changes of within-year variation in summer temperatures, which was a stronger determinant of body size than summer temperature alone. Climate-induced shifts in population characteristics were thus not observed for this species as long-term changes in important seasonal climate variables were not observed during the 23-years of the study. Different amphibian populations will likely be more resilient to climate change impacts than others, and the probability of amphibians exhibiting long-term population changes will depend on how seasonal climate change interacts with a species’ life history, phenology, and geographic location. Linking a wide range of seasonal climatic conditions to species or population characteristics should thus improve our ability for explaining idiosyncratic responses of species to climate change.
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Affiliation(s)
- Mark A Kirk
- Department of Zoology and Physiology, University of Wyoming, Laramie, Wyoming, United States of America.,Biology and Environmental Science Departments, Allegheny College, Meadville, Pennsylvania, United States of America
| | - Mark L Galatowitsch
- Biology and Environmental Science Departments, Allegheny College, Meadville, Pennsylvania, United States of America.,Department of Biology, Centre College, Danville, Kentucky, United States of America
| | - Scott A Wissinger
- Biology and Environmental Science Departments, Allegheny College, Meadville, Pennsylvania, United States of America
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39
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Craioveanu O, Craioveanu C, Ghira I, Mireșan V, Hartel T. Does carnivory pay off? Experiments on the effects of different types of diet on growth and development of Bufo bufo (Linnaeus, 1758) tadpoles and carry-over effects after metamorphosis. HERPETOZOA 2019. [DOI: 10.3897/herpetozoa.32.e35627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Natural diets of anuran larvae vary widely in their relative amounts of nutrients. The proportion of these ingested nutrients has significant influence on larval and post-metamorphic performance.
Here, we use the Common Toad to address the role of diet (exclusively carnivore, exclusively vegetarian and mixed) on growth and development of tadpoles and short-term carry-over effects on post-metamorphic animals. Larvae fed on an exclusively vegetarian diet performed better (faster growth and development) than larvae fed on exclusively carnivore and mixed diets. Larvae fed on the exclusively carnivore diet had the lowest performance. Regarding the carry-over effects of larval diets, although the body condition indices of the toadlets were similar in all treatments, there was a major difference in the survival rate. While toadlets, originating from larvae fed on a vegetarian diet, were more successful and had the lowest mortality, those fed on a carnivore diet had the highest mortality level. Our results suggest that a plant-based diet may contain all the necessary nutrients needed by Bufobufo larvae. Furthermore, a diet based exclusively on food of animal origin might be detrimental for the larval performance and could have significant carry-over effects on the post-metamorphic animal.
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40
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Stroud JT, Thompson ME. Looking to the past to understand the future of tropical conservation: The importance of collecting basic data. Biotropica 2019. [DOI: 10.1111/btp.12665] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James T. Stroud
- Department of Biology Washington University St. Louis Missouri
| | - Michelle E. Thompson
- Department of Science & Education Field Museum of Natural History Chicago Illinois
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41
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Cayuela H, Cruickshank SS, Brandt H, Ozgul A, Schmidt BR. Habitat‐driven life history variation in an amphibian metapopulation. OIKOS 2019. [DOI: 10.1111/oik.06286] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Hugo Cayuela
- Inst. de Biologie Intégrative et des Systèmes (IBIS), Univ Laval Québec, QC G1V 0A6 Canada
| | - Sam S. Cruickshank
- Inst. für Evolutionsbiologie und Umweltwissenschaften, Univ Zürich Zürich Switzerland
- Swiss Federal Inst. for Forest, Snow and Landscape Research (WSL) Birmensdorf Switzerland
| | - Hannelore Brandt
- Inst. für Evolutionsbiologie und Umweltwissenschaften, Univ Zürich Zürich Switzerland
| | - Arpat Ozgul
- Inst. für Evolutionsbiologie und Umweltwissenschaften, Univ Zürich Zürich Switzerland
| | - Benedikt R. Schmidt
- Inst. für Evolutionsbiologie und Umweltwissenschaften, Univ Zürich Zürich Switzerland
- Info fauna karch Neuchâtel Switzerland
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42
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Rowe JC, Duarte A, Pearl CA, McCreary B, Galvan SK, Peterson JT, Adams MJ. Disentangling effects of invasive species and habitat while accounting for observer error in a long‐term amphibian study. Ecosphere 2019. [DOI: 10.1002/ecs2.2674] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Jennifer C. Rowe
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon 97331 USA
| | - Adam Duarte
- Oregon Cooperative Fish and Wildlife Research Unit Department of Fisheries and Wildlife Oregon State University 104 Nash Hall Corvallis Oregon 97331 USA
| | - Christopher A. Pearl
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon 97331 USA
| | - Brome McCreary
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon 97331 USA
| | - Stephanie K. Galvan
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon 97331 USA
| | - James T. Peterson
- U.S. Geological Survey Oregon Cooperative Fish and Wildlife Research Unit Department of Fisheries and Wildlife Oregon State University 104 Nash Hall Corvallis Oregon 97331 USA
| | - Michael J. Adams
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis Oregon 97331 USA
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43
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Zylstra ER, Swann DE, Hossack BR, Muths E, Steidl RJ. Drought-mediated extinction of an arid-land amphibian: insights from a spatially explicit dynamic occupancy model. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2019; 29:e01859. [PMID: 30680832 DOI: 10.1002/eap.1859] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 11/28/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Understanding how natural and anthropogenic processes affect population dynamics of species with patchy distributions is critical to predicting their responses to environmental changes. Despite considerable evidence that demographic rates and dispersal patterns vary temporally in response to an array of biotic and abiotic processes, few applications of metapopulation theory have sought to explore factors that explain spatiotemporal variation in extinction or colonization rates. To facilitate exploring these factors, we extended a spatially explicit model of metapopulation dynamics to create a framework that requires only binary presence-absence data, makes few assumptions about the dispersal process, and accounts for imperfect detection. We apply this framework to 22 yr of biannual survey data for lowland leopard frogs, Lithobates yavapaiensis, an amphibian that inhabits arid stream systems in the southwestern United States and northern Mexico. Our results highlight the importance of accounting for factors that govern temporal variation in transition probabilities, as both extinction and colonization rates varied with hydrologic conditions. Specifically, local extinctions were more frequent during drought periods, particularly at sites without reliable surface water. Colonization rates increased when larval and dispersal periods were wetter than normal, which increased the probability that potential emigrants metamorphosed and reached neighboring sites. Extirpation of frogs from all sites in one watershed during a period of severe drought demonstrated the influence of site-level features, as frogs persisted only in areas where most sites held water consistently and where the amount of sediment deposited from high-elevation wildfires was low. Application of our model provided novel insights into how climate-related processes affected the distribution and population dynamics of an arid-land amphibian. The approach we describe has application to a wide array of species that inhabit patchy environments, can improve our understanding of factors that govern metapopulation dynamics, and can inform strategies for conservation of imperiled species.
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Affiliation(s)
- Erin R Zylstra
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, 85721, USA
| | - Don E Swann
- National Park Service, Saguaro National Park, Tucson, Arizona, 85730, USA
| | - Blake R Hossack
- U.S. Geological Survey, Northern Rocky Mountain Science Center, Missoula, Montana, 59801, USA
| | - Erin Muths
- U.S. Geological Survey, Fort Collins Science Center, Fort Collins, Colorado, 80526, USA
| | - Robert J Steidl
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, 85721, USA
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44
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Dornelas M, Gotelli NJ, Shimadzu H, Moyes F, Magurran AE, McGill BJ. A balance of winners and losers in the Anthropocene. Ecol Lett 2019; 22:847-854. [DOI: 10.1111/ele.13242] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/03/2018] [Accepted: 02/01/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Maria Dornelas
- Centre for Biological Diversity and Scottish Oceans Institute School of Biology University of St Andrews St Andrews FifeKY16 9TH UK
| | | | - Hideyasu Shimadzu
- Department of Mathematical Sciences Loughborough University Loughborough LeicestershireLE11 3TU UK
| | - Faye Moyes
- Centre for Biological Diversity and Scottish Oceans Institute School of Biology University of St Andrews St Andrews FifeKY16 9TH UK
| | - Anne E. Magurran
- Centre for Biological Diversity and Scottish Oceans Institute School of Biology University of St Andrews St Andrews FifeKY16 9TH UK
| | - Brian J. McGill
- School of Biology and Ecology Sustainability Solutions Initiative University of Maine Orono ME04469 USA
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45
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Urbina J, Galeano SP, Bacigalupe LD, Flechas SV. Disease Ecology: Past and Present for a Better FutureXI Latin American Congress of Herpetology, Quito, Ecuador, July 24–28 2017. COPEIA 2019. [DOI: 10.1643/ch-18-053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Jenny Urbina
- Department of Fisheries and Wildlife, Oregon State University, 2820 SW Campus way, Corvallis, Oregon 97331; . Send reprint requests to this address
| | - Sandra P. Galeano
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Calle 28A 15-09, Bogotá, Colombia 111311
| | - Leonardo D. Bacigalupe
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Sandra V. Flechas
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Calle 28A 15-09, Bogotá, Colombia 111311
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46
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Bardier C, Martínez-Latorraca N, Porley J, Bortolini S, Cabrera Alonzo N, Maneyro R, Toledo L. Seasonal demography of the threatened Montevideo Redbelly Toad ( Melanophryniscus montevidensis) in a protected area of Uruguay. CAN J ZOOL 2019. [DOI: 10.1139/cjz-2017-0362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Estimates of demographic parameters are scarce for Neotropical amphibians, a concerning fact because this region has the highest proportion of threatened amphibians in the world. We conducted a 3-year study where we applied a robust capture–mark–recapture design to assess the importance of breeding and non-breeding activity patterns over the survival rates, detection probabilities, and abundances of the Montevideo Redbelly Toad (Melanophryniscus montevidensis (Philippi, 1902)), a threatened anuran from Uruguay. The best models grouped seasons into hot and cold periods cyclically, were state-dependent in transition probabilities, and were time-dependent in detection probabilities for adults, but had constant detection probabilities for juveniles. Averaged estimates suggest a high survivorship rate during cold seasons (above 80%), but lower probabilities (below 60%) during hot seasons, especially for males. Analogously, the non-breeding activity had a seasonal pattern, with higher activity during spring and higher sheltering rates during autumn. These activity rates negatively influenced the averaged survivorship rates of adult males and females. Long-term (matrix) projections of seasonal survivorships, along with assessments of the causes of these patterns, should be carried out to determine extinction probabilities and possible threats for the conservation of the genus Melanophryniscus.
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Affiliation(s)
- C. Bardier
- Departamento de Ecología y Biología Evolutiva, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia 3318, Montevideo 11600, Uruguay
| | - N. Martínez-Latorraca
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - J.L. Porley
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - S.V. Bortolini
- Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - N. Cabrera Alonzo
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - R. Maneyro
- Laboratorio de Sistemática e Historia Natural de Vertebrados, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - L.F. Toledo
- Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo 13083-862, Brazil
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Davis RA, Lohr CA, Dale Roberts J. Frog survival and population viability in an agricultural landscape with a drying climate. POPUL ECOL 2018. [DOI: 10.1002/1438-390x.1001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Robert A. Davis
- School of Science; Edith Cowan University; Joondalup Western Australia Australia
- School of Biological Sciences; University of Western Australia; Perth Western Australia Australia
| | - Cheryl A. Lohr
- Department of Biodiversity, Conservation and Attractions; Science and Conservation Division; Perth Western Australia Australia
| | - J. Dale Roberts
- School of Biological Sciences; University of Western Australia; Perth Western Australia Australia
- Centre of Excellence in Natural Resource Management; University of Western Australia; Perth Western Australia Australia
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The impact of changing irrigation practices in rice fields on frog populations of the Kanto Plain, central Japan. Ecol Res 2018. [DOI: 10.1007/bf02523615] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Weltje L, Ufer A, Hamer M, Sowig P, Demmig S, Dechet F. Risk assessment considerations for plant protection products and terrestrial life-stages of amphibians. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 636:500-511. [PMID: 29715655 DOI: 10.1016/j.scitotenv.2018.04.189] [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: 12/23/2017] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 06/08/2023]
Abstract
Some amphibians occur in agricultural landscapes during certain periods of their life cycle and consequently might be exposed to plant protection products (PPPs). While the sensitivity of aquatic life-stages is considered to be covered by the standard assessment for aquatic organisms (especially fish), the situation is less clear for terrestrial amphibian life-stages. In this paper, considerations are presented on how a risk assessment for PPPs and terrestrial life-stages of amphibians could be conducted. It discusses available information concerning the toxicity of PPPs to terrestrial amphibians, and their potential exposure to PPPs in consideration of aspects of amphibian biology. The emphasis is on avoiding additional vertebrate testing as much as possible by using exposure-driven approaches and by making use of existing vertebrate toxicity data, where appropriate. Options for toxicity testing and risk assessment are presented in a flowchart as a tiered approach, progressing from a non-testing approach, to simple worst-case laboratory testing, to extended laboratory testing, to semi-field enclosure tests and ultimately to full-scale field testing and monitoring. Suggestions are made for triggers to progress to higher tiers. Also, mitigation options to reduce the potential for exposure of terrestrial life-stages of amphibians to PPPs, if a risk were identified, are discussed. Finally, remaining uncertainties and research needs are considered by proposing a way forward (road map) for generating additional information to inform terrestrial amphibian risk assessment.
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Affiliation(s)
- Lennart Weltje
- BASF SE, Crop Protection - Ecotoxicology, Speyerer Strasse 2, D-67117 Limburgerhof, Germany.
| | - Andreas Ufer
- BASF SE, Crop Protection - Ecotoxicology, Speyerer Strasse 2, D-67117 Limburgerhof, Germany
| | - Mick Hamer
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Peter Sowig
- Bayer CropScience, Industriepark Höchst H871, D-65926 Frankfurt am Main, Germany
| | - Sandra Demmig
- Syngenta Agro GmbH, Am Technologiepark 1-5, D-63477 Maintal, Germany
| | - Friedrich Dechet
- Industrieverband Agrar e.V., Mainzer Landstrasse 55, D-60329 Frankfurt am Main, Germany
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Abstract
AbstractWe monitored egg clutch numbers of a population of the endemic Italian agile frog Rana latastei in a Site of Community Interest in northern Italy (SCI IT 209000) during 1997–2017 with the aim of assessing the long-term variation in its abundance. We walked along the banks of canals and small ponds (n = 22) 1–3 times per week between early February and mid-April each year to detect egg clutches. The relationships between the start of the breeding season, yearly egg mass counts, rate of yearly change in the number of recorded egg masses and 15 climatic and environmental variables were assessed by multiple regression. The first deposition of eggs occurred progressively later in the year throughout the study period and mean air temperature during the breeding season decreased over this period. Agile frogs showed high deposition site-fidelity. Despite large variations in the number of egg clutches detected from year to year, the population size remained stable in the long term. Peaks in the number of egg clutches occurred 2 years after the dredging of canals, carried out every 4–6 years to improve water availability, starting in 2004 as part of a LIFE Nature Project. This was the only predictor of the number of egg clutches deposited, suggesting that periodical management is needed to support the agile frog population. Our results reinforce the need for multi-year monitoring to determine both the long-term success of habitat restoration projects and the status of residual populations.
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