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Special Issue "Ecology and Conservation of Amphibians"

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A special issue of Diversity (ISSN 1424-2818). This special issue belongs to the section "Biodiversity Conservation".

Deadline for manuscript submissions: closed (15 April 2023) | Viewed by 3271

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Dr. Oldřich Kopecký

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Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 - Suchdol, 165 21 Prague, Czech Republic
Interests: behavioral ecology of amphibians; invasive biology; pet trade monitoring; nature conservation

Special Issue Information

Dear Colleagues,

Diversity is launching a Special Issue dedicated to the Ecology and Conservation of Amphibians.

Amphibians are vertebrates with complex life cycles and limited dispersal abilities. These characteristics, in combination with their anatomy (permeable integument) make them more sensitive to environmental disturbances than other animals. Recently they have been rated as the most endangered group of vertebrates. Important individual factors that are involved (and can act synergically) include habitat loss and fragmentation, environmental pollution, disease spread, climate change, introduction of exotic species and exploitation (food, pet trade) by humans. This global decline even resulted in renewed interest in captive breeding as a conservation tool for amphibians. Global amphibian decline is the main reason to focus our attention to the development of knowledge about their ecology, which is key for proper conservation plans and actions. However, amphibians are also traditionally used as model organisms for studying wider ecological processes. They form significant biomass in ecosystems, and moreover, as ectotherms they are able to exploit energy-poor resources and thus serve as a link between the lowest and highest trophic levels within a community. Their strong site fidelity and spatially disjunct breeding habitats make them models for studying metapopulation dynamics. Amphibians are widely used as bioindicators. Extinctions and population declines are critical not only because amphibians are key components of many ecosystems, but also because the causative factors might also be affecting other organisms.

Dr. Oldřich Kopecký
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Diversity is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

Anura
Caudata
amphibian decline
diversity

Published Papers (4 papers)

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Research

Open AccessArticle

High Evolutionary Potential Maintained in Common Frog (Rana temporaria) Populations Inhabiting Urban Drainage Ponds

and

Diversity 2023, 15(6), 738; https://doi.org/10.3390/d15060738 (registering DOI) - 02 Jun 2023

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Abstract

Urbanisation leading to habitat change and fragmentation is a recognised global threat to biodiversity. However, it may also offer opportunities for some species. Genetic diversity, one of the three components of biodiversity, is often overlooked in conservation planning and policy. In the present study, we used a panel of seven microsatellite markers to compare the genetic structure of 34 common frog (Rana temporaria) populations residing in urban and suburban drainage ponds in Inverness (Scotland) with populations from rural surroundings. As a main finding, the levels of genetic variation were indiscernible between (sub)urban and rural populations. Significant isolation-by-distance was observed only for rural populations, with measures of pairwise genetic differentiation (F_st) that were, on average, lower than those in urban and suburban areas. The mean numbers of alleles remained stable between two temporal sets of samples collected at intervals broadly representing one R. temporaria generation, but with a tendency of decreasing allelic richness, irrespectively of the site characteristics. Taking these results together, our study revealed that the elevated levels of differentiation between R. temporaria populations inhabiting (sub)urban drainage ponds did not lead to increased levels of genetic erosion. Our findings support the importance of well-designed blue–green infrastructure in urban landscapes for the retention of within-species genetic diversity and can help to inform future biodiversity management policies. Full article

(This article belongs to the Special Issue Ecology and Conservation of Amphibians)

Open AccessArticle

Defining Evolutionary Conservation Units in the Macedonian Crested Newt, Triturus macedonicus (Amphibia; Salamandridae), in a Biodiversity Hotspot

Taxiarchis Danelis

Anagnostis Theodoropoulos

Elisavet-Aspasia Toli

Anastasios Bounas

Athanasios Korakis

and

Konstantinos Sotiropoulos

Diversity 2023, 15(5), 671; https://doi.org/10.3390/d15050671 - 15 May 2023

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Abstract

In this study, we used genetic approaches to assess the conservation status of a protected amphibian species, the Macedonian crested newt, Triturus macedonicus, in Northern Pindos National Park (Epirus, Greece). Mitochondrial DNA sequences and multilocus genotypes of individuals from 38 breeding sites were used to infer their phylogenetic position and to detect and measure genetic variation patterns, population genetic structure, and levels of gene flow. The examined individuals fell within two major clades of the Macedonian crested newt phylogeny, being geographically separated by the Aoos River valley and Vikos Gorge. Both groups constitute separate gene pools, bearing private haplotypes and alleles, and the groups were found to be highly differentiated in both their mitochondrial and microsatellite markers. Thus, they meet all of the criteria needed to be characterized as evolutionary significant units (ESUs) that deserve a separate conservation status. Within each ESU, the particularly high inter-population differentiation and low migration rates imply a lack of connectivity between breeding sites and local isolation in favorable habitats. Our results can inform future programs and actions towards the conservation and management of the Macedonian crested newt in the area. Full article

(This article belongs to the Special Issue Ecology and Conservation of Amphibians)

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Open AccessArticle

Causes for the High Mortality of European Green Toad Tadpoles in Road Stormwater Ponds: Pollution or Arrival of a New Predator?

and

Diversity 2023, 15(4), 485; https://doi.org/10.3390/d15040485 - 25 Mar 2023

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Abstract

Declining wetland areas cause many amphibian species to breed inside stormwater ponds (SWPs), which have been constructed alongside major roads to collect and retain polluted road runoff water. However, the suitability of such artificial ponds as a breeding habitat for amphibians remains unclear. Recently, a study found a very low survival rate of European green toad tadpoles (Bufotes viridis) inside SWPs, presumably because of high sediment pollution and/or the presence of a leech Helobdella stagnalis. To establish the effects of sediment pollution and leech presence on tadpole growth and survival, we exposed 480 green toad tadpoles to a number of controlled conditions inside holding tanks. We tested the following conditions: (1) ‘control’ (clean sediment + clean water); (2) ‘leech’ (clean sediment + clean water + leeches); (3) ‘SWP sediment’ (clean water + polluted sediment); and (4) ‘SWP sediment + leech’ (clean water + polluted sediment + leeches). Tadpole size and survival was monitored until metamorphosis and, individuals participated in swim tests and respirometry trials to the test potential effects of pollution on their escape capacity and metabolic rate. We found that the growth rate of tadpoles exposed to the SWP sediment (condition 3) was increased, while pollution had no effect on survival. By contrast, leeches heavily preyed upon tadpoles, leaving no survivors in conditions 2 and 4. Tadpoles swim speed and metabolic rate of toadlets did not differ between the ‘control’ and ‘SWP sediment’ group, the only conditions with surviving individuals. Our study found that leeches had the strongest effect on tadpole survival and were likely responsible for the low survival rates in SWPs observed recently. Hence, we suggest that adequate management measures are needed to limit leech penetration inside SWPs (frequent dredging/draining) to prevent these artificial structures from becoming an ecological trap for locally endangered amphibians but rather a base to help in their recovery. Full article

(This article belongs to the Special Issue Ecology and Conservation of Amphibians)

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Open AccessCommunication

Telemetry and Accelerometer Tracking of Green Toads in an Urban Habitat: Methodological Notes and Preliminary Findings

Magdalena Spieẞberger

and

Diversity 2023, 15(3), 328; https://doi.org/10.3390/d15030328 - 23 Feb 2023

Viewed by 834

Abstract

Advancements in tracking technologies provide an increasingly important tool in animal monitoring and conservation that can describe animal spatial behavior in native habitats and uncover migratory routes that otherwise may be difficult or impossible to map. In addition, high-resolution accelerometer sensors provide powerful insights into animal activity patterns and can help to identify specific behaviors from accelerometer profiles alone. Previously, such accelerometers were restricted to larger animals due to size and mass constraints. However, recent advances make it possible to use such devices on smaller animals such as the European green toad (Bufotes viridis), the focus of our current study. We deploy custom made tracking devices, that consist of very-high-frequency transmitters and tri-axial accelerometers, to track toads in their native urban environment in Vienna (Austria). A total of nine toads were tracked, ranging from three to nine tracking days per individual during the post-breeding season period. We demonstrate that our devices could reliably monitor toad movement and activity during the observation period. Hence, we confirmed the predominantly nocturnal activity patterns and recorded low overall movement at this urban site. Accelerometer data revealed that toads exhibited brief but intense activity bursts between 10 pm and midnight, resting periods during the night and intermittent activity during the day. Positional tracking alone would have missed the major activity events as they rarely resulted in large positional displacements. This underscores the importance of and value in integrating multiple tracking sensors for studies of movement ecology. Our approach could be adapted for other amphibians or other animals with mass constraints and may become standard monitoring equipment in the near future. Full article

(This article belongs to the Special Issue Ecology and Conservation of Amphibians)

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Special Issue "Ecology and Conservation of Amphibians"

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