Population Dynamics Of The Columbia Spotted Frog Rana Luteiventris
DOWNLOAD
Download Population Dynamics Of The Columbia Spotted Frog Rana Luteiventris PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Population Dynamics Of The Columbia Spotted Frog Rana Luteiventris book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Population Dynamics Of The Columbia Spotted Frog Rana Luteiventris
DOWNLOAD
Author : Rebecca Marie Wahl McCaffery
language : en
Publisher:
Release Date : 2010
Population Dynamics Of The Columbia Spotted Frog Rana Luteiventris written by Rebecca Marie Wahl McCaffery and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electronic dissertations categories.
Worldwide extinctions of amphibians are at the forefront of the biodiversity crisis, with climate change figuring prominently as a potential driver of continued amphibian decline. Changes in both the mean and variability of climate conditions may affect amphibian populations in complex, unpredictable ways. However, few studies have evaluated effects of climate change on individual vital rates and subsequent population dynamics of amphibians. I investigated the population dynamics of a high elevation population of the Columbia spotted frog (Rana luteiventris) in relation to climate variation over a ten-year period. I documented an increase in survival and breeding probability as severity of winter decreased. Therefore, a warming climate with less severe winters is likely to promote population viability in this montane frog population. More generally, amphibians and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact. I then used Bayesian models to demonstrate that changes in mean snowpack had a greater effect on viability than changes in the variance of snowpack. In general, future decreases in mean snowpack increase population viability, and increases in variability have little effect. Finally, I examined whether heterogeneity in pond hydroperiod on the landscape had the potential to stabilize recruitment and population dynamics. Overall, ponds with different hydroperiods showed contrasting dynamics among years. Variability in recruitment was lowest in the scenario with the greatest pond heterogeneity, suggesting that the presence of a diversity of hydroperiods on the landscape may reduce variability in amphibian recruitment. Through my research, I have been able to determine relationships between climate variables and vital rates in the Columbia spotted frog, and then use population models to explore how future changes in climate or habitat could affect the viability of this population. These results add to our understanding of how climate variation may influence Rana luteiventris dynamics in montane environments, but also provide a demographic backdrop for determining which factors might affect other amphibian populations and species in diverse mountain environments.
Ecology Of The Columbia Spotted Frog In Northeastern Oregon
DOWNLOAD
Author : Evelyn L. Bull
language : en
Publisher:
Release Date : 2005
Ecology Of The Columbia Spotted Frog In Northeastern Oregon written by Evelyn L. Bull and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Amphibian declines categories.
The Columbia spotted frog (Rana luteiventris) is one of several amphibians in the Western United States experiencing population declines. The breeding, postbreeding, and overwintering habitat and ecology of this species were investigated in 10 study sites in northeastern Oregon from 1997 through 2004. A variety of habitats with permanent water were used as breeding sites and as postbreeding habitat during the summer. Ice-covered ponds, warm springs, rivers, and seeps in forested habitats were used for overwintering. Diet consisted of a wide variety of mollusks and arthropods with beetles, ants, wasps, and flies composing more than 50 percent. Population size was as high as 135 females at one site, and ratios of males to females ranged from 1.0 to 2.8. The oldest male and female were 9.7 and 8.7 years old, respectively, based on skeletochronology. Males reached sexual maturity at 1 year 9 months after metamorphosis and most females at 2 years 9 months after metamorphosis. One female laid eggs in up to 3 consecutive years. Size (snout-vent length) was not a good indicator of age in frogs older than 2 years. Long-term monitoring is necessary to determine the effects of a variety of disturbance factors and chytrid fungus that could influence spotted frog populations in northeastern Oregon.
The Ecology And Population Status Of The Columbia Spotted Frog Rana Luteiventris At Their Northern Range Limit
DOWNLOAD
Author : Lee Mennell
language : en
Publisher:
Release Date : 1998
The Ecology And Population Status Of The Columbia Spotted Frog Rana Luteiventris At Their Northern Range Limit written by Lee Mennell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Oregon spotted frog categories.
Ecology Of The Columbia Spotted Frog In Northeastern Oregon
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2005
Ecology Of The Columbia Spotted Frog In Northeastern Oregon written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Amphibian declines categories.
Amphibian Declines
DOWNLOAD
Author : Jamie Kristine Reaser
language : en
Publisher:
Release Date : 1997
Amphibian Declines written by Jamie Kristine Reaser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Amphibian declines categories.
Reproductive Biology And Population Structure Of The Columbia Spotted Frog Rana Luteiventris Across The Palouse
DOWNLOAD
Author : Abbey Beth Davis
language : en
Publisher:
Release Date : 2004
Reproductive Biology And Population Structure Of The Columbia Spotted Frog Rana Luteiventris Across The Palouse written by Abbey Beth Davis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Animal population density categories.
Population Estimates For The Toiyabe Population Of The Columbia Spotted Frog Rana Luteiventris 2004 10
DOWNLOAD
Author : U.S. Department of the Interior
language : en
Publisher: CreateSpace
Release Date : 2014-03-30
Population Estimates For The Toiyabe Population Of The Columbia Spotted Frog Rana Luteiventris 2004 10 written by U.S. Department of the Interior and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03-30 with Nature categories.
The Toiyabe population of Columbia spotted frogs (Rana luteiventris, hereafter “Toiyabe frogs”) is a geographically isolated population located in central Nevada (fig. 1). The Toiyabe population is part of the Great Basin Distinct Population Segment of Columbia spotted frogs, and is a candidate for listing under the Endangered Species Act (U.S. Fish and Wildlife Service, 2011). The cluster of breeding sites in central Nevada represents the southernmost extremity of the Columbia spotted frogs' known range (Funk and others, 2008).
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary
DOWNLOAD
Author : Kristine W. Wilson
language : en
Publisher:
Release Date : 2001
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary written by Kristine W. Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Animal populations categories.
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Columbia spotted frog categories.
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2003
Columbia Spotted Frog Rana Luteiventris Population Monitoring Summary written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Columbia spotted frog categories.