Download or read book Experimental Repatriation of Mountain Yellow legged Frogs Rana Muscosa in the Sierra Nevada of California written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Impacts of Mountain Yellow legged Frog Rana Muscosa and Rana Sierrae Declines on Sierra Nevada Lake Communities written by Thomas Collier Smith and published by . This book was released on 2015 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mountain yellow-legged frogs (Rana muscosa and Rana sierrae) of California's Sierra Nevada have been extirpated from over 90% of their historic range, initially by introduced trout predators, and more recently by the emergence of the lethal amphibian chytrid fungus (Batrachochytrium dendrobatidis). Formerly widespread and abundant, mountain yellow-legged frogs are grazers and highly connected high level predators, living in low diversity, low productivity high elevation lakes. Here, I examine the extent to which frog extinctions impact Sierra Nevada lake communities. First, in a study that combined surveys of benthic macroinvertebrates in 22 lakes over 5 years with a reanalysis of benthic macroinvertebrate community data from over 150 lakes, I found no strong differences in benthic macroinvertebrate community diversity or composition between lakes with frogs vs. lakes without frogs. I also conducted experiments to evaluate the impact of tadpoles as grazers on benthic algae, and found that tadpoles do reduce algal biomass in artificial habitats, but that the effect can be small and may not outweigh the influence that abiotic variability has on algal biomass in lakes. Lastly, while I documented that large and periodic tadpole aggregations create biogeochemical hotspots of dissolved nitrogen, the phenomena may not be widespread enough to drive differences in diatom diversity in lakes with vs. without tadpoles. Within lakes, I found little indication that diatom community diversity and composition were responding to tadpole generated nitrogen hotspots as a fluctuation-dependent mechanism with potential to enhance diatom coexistence. While none of the ecological effects of mountain yellow-legged frogs and tadpoles that I observed suggests that their extinctions are having large impacts on Sierra Nevada lake communities, they should not be discounted as expendable, because there are many other ways in which these amphibians could be important in their communities.

Download or read book California Red legged Frog Rana Aurora Draytonii and Mountain Yellow legged Frog Rana Muscosa Surveys for the Coachella Valley Association of Governments CVAG 2003 written by Adam Backlin and published by . This book was released on 2003 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mountain Yellow legged Frog Rana Muscosa Conservation written by and published by . This book was released on 2012 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mountain yellow-legged frog (Rana muscosa) has a disjunct distribution spread between the Sierra Nevada and southern California. The southern California population of mountain yellowlegged frog (MYLF) is recognized as a distinct population segment, and with less than 200 adults remaining in the wild, is protected under the federal endangered species act. I examined multiple facets of MYLF conservation across both wild and captive populations with the goal of improving current conservation efforts for the species. To understand the microhabitat needs of the MYLF I modeled the relationship between MYLF presence and 11 microhabitat variables on a per pool scale. Logistic regression models with Akaike's Information Criteria (AIC) were created for both frog and tadpole life stages. The frog model revealed that pool volume, pool leaf litter, bank leaf litter, and understory cover were important variables associated with frog presence. The tadpole model indicated that pool depth and understory cover were important and that pH was marginally important. This knowledge of the microhabitat needs of the MYLF can improve reintroduction efforts by allowing managers to make more informed decisions about where the MYLF should be reintroduced. To improve the reproductive output of a captive colony of MYLF with a history of low reproductive success, I measured the effect of an artificial hibernation period on multiple reproductive behaviors. Males subjected to advertisement calls of conspecific males demonstrated an increased phonotaxic response after a hibernation period (P = 0.01). However, females did not demonstrate a change in phonotaxic response after hibernation (P = 0.93). Examining the reproductive behaviors of breeding pairs I found that males who were hibernated had significantly higher frequencies of amplexus (P

Download or read book Decline of Frog Species in the Yosemite Section of the Sierra Nevada written by Charles A. Drost and published by . This book was released on 1994 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spatial Patterns of California Amphibian Declines and Ecological Limits written by Carlos Davidson and published by . This book was released on 2000 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tehachapi Renewable Transmission Project TRTP written by and published by . This book was released on 2010 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Analysis of the Food Source of the Tadpoles of Rana Muscosa in Two Selected Lakes in the Sierra Nevada Mountains of California written by Nicholas Biehle and published by . This book was released on 1969 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings RMRS written by and published by . This book was released on 2000 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frogs of the United States and Canada written by C. Kenneth Dodd Jr. and published by JHU Press. This book was released on 2023-06-20 with total page 991 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most thorough, updated guide to frogs and toads in the United States and Canada available. A stunning diversity of frog species can be found from coastal swamps to lofty mountain peaks, and from the Florida Keys to the Arctic Ocean. They live in subtropical lowlands, grassland prairies, deserts, and alpine-tundra habitats. Some species have restricted habitat requirements, whereas others occur contiguously from the arid plains or humid southeastern forests to the high tundra. In this new edition of Frogs of the United States and Canada, C. Kenneth Dodd Jr. tours the reader through the marvelous world of North American frogs. Covering 114 native and introduced species from all US states and Canadian provinces, this comprehensive reference on the biology, behavior, and conservation of the Order Anura includes detailed and updated information on • past and present distribution • life history and demography • reproduction and diet • landscape ecology and evolution • diseases, parasites, and threats from toxic substances • conservation and management Hundreds of occurrence maps, line drawings, and new color photographs of frogs and their habitats enhance the text. The most thorough treatment of the life histories, distribution, and status of North American frogs ever produced, Frogs of the United States and Canada has been the go-to reference for naturalists, scientists, and resource managers in their efforts to understand and conserve frogs, their habitats, and biodiversity for over a decade. Based on a meticulously updated examination of more than 8,000 references current through 2021, this second edition ensures Dodd's master work will remain an unparalleled resource for years to come.

Download or read book Wilderness Science in a Time of Change Conference written by and published by . This book was released on 2000 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wilderness Science in a Time of Change Conference Wilderness ecosystems threats and management written by and published by . This book was released on 2000 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Disappearing Jewels written by Bruce E. Young and published by . This book was released on 2004-01-01 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wildlife Disease Ecology written by Kenneth Wilson and published by Cambridge University Press. This book was released on 2019-11-14 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduces readers to key case studies that illustrate how theory and data can be integrated to understand wildlife disease ecology.

Download or read book A Standardized Protocol for Surveying Aquatic Amphibians written by Gary M. Fellers and published by . This book was released on 1995 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Animal Life in the Yosemite written by Joseph Grinnell and published by . This book was released on 1924 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measuring and Monitoring Biological Diversity written by Ronald Heyer and published by Smithsonian Institution. This book was released on 2014-12-16 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring and Monitoring Biological Diversity is the first book to provide comprehensive coverage of standard methods for biodiversity sampling of amphibians, with information on analyzing and using data that will interest biologists in general. In this manual, nearly fifty herpetologists recommend ten standard sampling procedures for measuring and monitoring amphibian and many other populations. The contributors discuss each procedure, along with the circumstances for its appropriate use. In addition, they provide a detailed protocol for each procedure's implementation, a list of necessary equipment and personnel, and suggestions for analyzing the data. The data obtained using these standard methods are comparable across sites and through time and, as a result, are extremely useful for making decisions about habitat protection, sustained use, and restoration—decisions that are particularly relevant for threatened amphibian populations.