干旱区生态环境知识资源中心(Arid): Surface-water availability governs survival of an amphibian in arid mountain streams

Arid

DOI	10.1111/fwb.13204
	Surface-water availability governs survival of an amphibian in arid mountain streams
	Zylstra, Erin R.1; Swann, Don E.2; Steidl, Robert J.1
通讯作者	Zylstra, Erin R.
来源期刊	FRESHWATER BIOLOGY
ISSN	0046-5070
EISSN	1365-2427
出版年	2019
卷号	64 期号:1 页码:164-174
英文摘要	Declines in amphibian populations worldwide have been linked to multiple factors, including recent changes in climate. Changes in precipitation, for example, can alter the availability of aquatic resources that are required by many amphibians for successful reproduction and larval development. Changes in climate have the potential to affect other important demographic parameters, particularly for species that are active year-round. Therefore, we studied survival of post-metamorphic (snout-vent length >= 50 mm) lowland leopard frogs (Lithobates yavapaiensis) in arid mountain canyons, where surface water is limited and its availability can vary markedly within and among years. Between 2013 and 2015, we surveyed frogs 33-74 times in each of six stream reaches distributed across two catchments in southern Arizona and used capture-recapture methods based on in situ photographs to identify individuals. We used Cormack-Jolly-Seber models to explore how surface-water availability, weather and vegetation influenced seasonal variation in apparent survival of post-metamorphic individuals. Overall, mean annual apparent survival in this dynamic, arid environment was low (phi<^> = 0.11, 95% confidence interval = 0.07-0.14). Survival varied with ambient temperature, dew point, perimeter groundcover and year, but especially with changes in surface-water availability. When water levels were at or near 100% of maximum pool depths, mean monthly survival was high (phi<^> >= 0.88); when water levels were at 50%, survival decreased modestly (phi<^> = 0.81) and when at 20%, survival dropped sharply (phi<^> = 0.36). A decrease in survival of post-metamorphic frogs in response to severe drought almost certainly contributed to the extirpation of frogs from one catchment in 2015. We anticipate that predicted increases in frequency and severity of drought will decrease the probability that lowland leopard frogs persist in this region over the long-term, as droughts are expected to increase local extirpations and limit the ability of individuals to disperse through an increasingly arid landscape.
英文关键词	capture-recapture intermittent stream Lithobates yavapaiensis lowland leopard frog seasonal drought
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000453853500013
WOS关键词	AMERICAN SOUTHWEST ; CAPTURE-RECAPTURE ; LEOPARD FROGS ; POPULATIONS ; DYNAMICS ; MARK ; DECLINES ; CLIMATE ; TRENDS
WOS类目	Ecology ; Marine & Freshwater Biology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215736
作者单位	1.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA; 2.Natl Pk Serv, Saguaro Natl Pk, Tucson, AZ USA
推荐引用方式 GB/T 7714	Zylstra, Erin R.,Swann, Don E.,Steidl, Robert J.. Surface-water availability governs survival of an amphibian in arid mountain streams[J]. University of Arizona,2019,64(1):164-174.
APA	Zylstra, Erin R.,Swann, Don E.,&Steidl, Robert J..(2019).Surface-water availability governs survival of an amphibian in arid mountain streams.FRESHWATER BIOLOGY,64(1),164-174.
MLA	Zylstra, Erin R.,et al."Surface-water availability governs survival of an amphibian in arid mountain streams".FRESHWATER BIOLOGY 64.1(2019):164-174.