GLOBAL AMPHIBIAN DECLINES: SORTING THE HYPOTHESES by J. COLLINS Download PDF EPUB FB2
Global change hypotheses receiving the most attention are those where human actions might cause amphibian declines from global warming, increased levels of UV‐B radiation, exposure to contaminants (e.g.
from widespread use of synthetic organic compounds such as DDT, PCBs or CFCs) or increased susceptibility to by: Reports of malformed amphibians and global amphibian declines have led to public concern, particularly because amphibians are thought to be indicator species of overall environmental health.
The topic also draws scientific attention because there is no obvious, simple answer to the question of what is causing amphibian declines?Cited by: Global amphibian declines: sorting the hypotheses JAMES P. COLLINS'* and ANDREW STORFER2 *lDepartment of Biology, Arizona State University, Tempe, AZUS.
E-mail. [email protected] and 2School of Biological Sciences, Washington State University, Pullman, WAUS.A. Abstract. Reports of malformed amphibians. tion: what is causing amphibian declines.
SIX HYPOTHESES There are six leading hypotheses thought to underlie amphibian declines. The ﬁrst three, alien species, over-exploitation and land use change, are known for their negative affects on biodiver-sity of native communities. A fourth hypothesis is global change, which includes increased ultravio.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): and global amphibian declines have led to public concern, particularly GLOBAL AMPHIBIAN DECLINES: SORTING THE HYPOTHESES book amphibians are thought to be indicator species of overall envi-ronmental health.
The topic also draws scientific attention because there is no obvious, simple answer to the question of what is causing amphi-bian declines.
Complex interactions of several anthropogenic factors are probably at work, and understanding amphibian declines may thus serve as a model for understanding species declines in general.
While we have fewer answers than we would like, there are six leading hypotheses that we sort. Observed declines in amphibian populations have been attributed to six major factors: habitat loss and degradation, global climate change, commercial exploitation, introduced species.
Global amphibian declines: sorting the hypotheses. By James P. Collins and Andrew Storfer. Abstract. and global amphibian declines have led to public concern, particularly because amphibians are thought to be indicator species of overall envi-ronmental health.
The topic also draws scientific attention because there is no obvious, simple answer Cited by: A global assessment (Baillie et al (eds) ) found that nearly one-third (32%) of the world's amphibians are threatened, representing 1, species. Amphibians have existed on earth for over million years, yet in just the last two decades there have been an alarming number of extinctions, nearly species are believed to have gone extinct and at least 2, (43%) more have populations that.
However, evidence linking amphibian declines in Central America to climate relies solely on correlations, and the mechanisms underlying the declines are not understood. Joining scientific rigor and vivid storytelling, this book is the first to use amphibian decline as a lens through which to see more clearly the larger story of climate change, conservation of biodiversity, and a host of profoundly important ecological, evolutionary, ethical, philosophical, and sociological by: Amphibians are among the most endangered animals on Earth, and climatic shifts are among the hypothesized factors in their decline.
We used spatial patterns of recent amphibian declines in Italy to test hypotheses pertaining to three potential, nonexclusive factors: climate change, habitat alteration, and high levels of incident solar by: Chytridiomycosis, an emerging infectious disease (EID) of the skin caused by the chytrid fungus, Batrachochytrium dendrobatidis, has been linked with continuing amphibian population declines in the western USA, Central America, Europe, Africa, and c analysis suggests that B.
dendrobatidis is a recently emerged pathogen. This article reviews the biology of this pathogenic Cited by: Full Text; PDF ( K) PDF-Plus ( K) Suppl. data; Citing articles; Amphibian habitat creation on postindustrial landscapes: a case study in a reclaimed coal strip-mine area 1.
Rochelle M. Stiles, a Jonathan W. Swan, a Jaimie L. Klemish, a Michael J. Lannoo b a Department of Biology, Indiana State University, Terre Haute, INUSA. b Indiana University School of Medicine–TH, Terre Cited by: 1. It is well established that a decrease in genetic variation can lead to reduced fitness and lack of adaptability to a changing environment.
Amphibians are declining on a global scale, and we present a four-point argument as to why this taxonomic group seems especially prone to such genetic processes. We elaborate on the extent of recent fragmentation of amphibian gene pools and we propose the Cited by: I was curious how anyone knew that the amphibians were in decline.
Last but not least, I knew that a pathogen had been determined to be the 'cause' for the amphibian declines, yet a considerable research effort continues towards determining how various other factors affect amphibian declines, including global warming and habitat loss/5.
Predation of larvae by exotic predators, particularly fish, is listed as a major cause of amphibian population declines and extinction events on a global scale (Collins and StorferKats and Ferrer ). Although direct predation is therefore a logical hypothesis to explain the negative association between amphibian larvae and exotic Cited by: 4.
High emphasis is placed on amphibian importance as a buffer system, which has inhibiting effect on technogenic transformation of biogeocoenoses. Issues of the animals’ use in biological restoration, ecological rehabilitation of technogenic landscapes and in bioindication of environmental conditions are covered.
Сhange in any component of the ecosystem leads to changing of the whole by: 3. Global amphibian declines: sorting the hypotheses.
Diversity and Distributions (). School of Life sciences and interdisciplinary resaerch. Southwest Consortium for Theoretical, Mathematical, and Computational Biology (Sep ). Frederick Ness Book Award for Understanding and Improving Liberal Education Committee, Association of.
Amphibians, a class of animals in global decline, are present in agricultural landscapes characterized by agrochemical inputs. Effects of pesticides on terrestrial life stages of amphibians such as juvenile and adult frogs, toads and newts are little understood and a specific risk assessment for pesticide exposure, mandatory for other vertebrate groups, is currently not by: Investigation by wildlife biologists into the cause of the decline of amphibian populations has revealed that many factors (e.g., pollution, habitat loss, and invasive species) are likely to be involved.
As basal fungi, Chytridiomycetes have presumably retained many of the characteristics of the last common ancestor with other Fungi millions of years by: 1.
In this study, we applied a method of site-occupancy modeling to estimate the influence of an invasive frog, Xenopus laevis, on the amphibian species richness in western France. In our analyses we took into account habitat characteristics (i.e.
the size and general shape of the ponds), the structure of the aquatic vegetation, the presence of Cited by: 5. Juvenile dispersal is important for the persistence of amphibian populations. Previous studies have observed nonrandom orientation in juvenile amphibians emigrating from breeding ponds; however, the environmental cues associated with these movements are not well by: Many problems and challenges of ecosystem management currently are driven by the rapid pace and spatial extent of landscape change.
Parks and reserves within areas of high human population density are especially challenged to meet the recreational needs of local populations and to preserve valued environmental resources. The complex problem of managing multiple objectives and Cited by: 7.
Collins JP, Storfer A () Global amphibian declines: sorting the hypotheses. Diversity and Distributions – doi: /jx ArticleCited by: 5. The decline in amphibian populations is an ongoing mass extinction of amphibian species worldwide. Since the s, decreases in amphibian populations, including population crashes and mass localized extinctions, have been observed in locations all over the declines are known as one of the most critical threats to global biodiversity.
Recent () research indicates the. Buy Extinction in Our Times: Global Amphibian Decline 1 by Collins, James P., Crump, Martha L. (ISBN: ) from Amazon's Book /5(3). Collins JP & Storfer A. Amphibian declines: Sorting the hypotheses.
Diversity and Distributions Collins JP, Brunner JL, Miera V, Parris MJ, Schock DM & Storfer A. Ecology and evolution of infectious disease. In Amphibian Conservation pp Semlitsch RD, editor.
Smithsonian Institution Press, Washington D.C. Amphibians, a class of animals in global decline, are present in agricultural landscapes characterized by agrochemical inputs. Effects of pesticides on terrestrial life stages of amphibians Cited by: Introduction.
Amphibian conservation is gaining considerable attention as a result of increasing quantitative evidence of global population declines.In the Sierra Nevada, nearly half of the native amphibian species are considered at risk by state and federal regulatory agencies.Exotic species introductions, infectious diseases, climate change, and anthropogenic land-use changes such as Cited by:.
The climate-linked epidemic hypothesis predicts amphibian declines in unusually warm years, because shifts in temperature or related variables often influence disease dynamics 9,10,As Cited by: Extinction in Our Times: Global Amphibian Decline Hardcover – July 1 with the causes for the declines being more complex than a global epidemic of some sort?
This book answers these questions, and it is nicely written in an easy to follow format using an historical prespective: describing how the problem was discovered, how herpatologists /5(3).Although amphibians have been widely promoted as indicators of biodiversity and environmental change, rigorous tests are lacking.
Here key indicator criteria are distilled from published papers, and a species that has been promoted as a bioindicator, the great crested newt, is tested against them.
Although a link was established between the presence of great crested newts and aquatic plant Cited by: