干旱区生态环境知识资源中心(Arid): The high cost of movement in an arid working landscape for an endangered amphibian

Arid

DOI	10.1002/ece3.11259
	The high cost of movement in an arid working landscape for an endangered amphibian
	Brocka, Colin W.; Mazzamuto, Maria Vittoria; Koprowski, John L.
通讯作者	Mazzamuto, MV
来源期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
出版年	2024
卷号	14 期号:4
英文摘要	Connectivity is essential for the maintenance of genetic diversity and stability of wildlife populations. Drought and changing precipitation regimes have caused natural aquatic amphibian breeding habitats to disappear or become isolated and have led to the replacement of natural surface water with artificial livestock water tanks. Terrestrial movement is the only means of responding to aquatic threats in arid landscapes and to allow population connectivity. Aridity may present an impenetrable barrier in hydrologically fragmented environments. We used a facultatively paedomorphic and federally endangered salamander to assess the challenges of movement across arid working lands. Sonoran tiger salamanders (Ambystoma mavortium stebbinsi) are endemic to the San Rafael Valley of southeastern Arizona, United States of America, where they depend on livestock water tanks as breeding habitat. The ecology of this species' metamorphs outside of stock tanks is virtually unknown. To assess survival on the landscape during terrestrial movement we used radio-transmitters to track 78 adult metamorphosed salamanders over 2 years. Sonoran tiger salamanders moved up to 1 km from the tank edge, and average distances moved of over 400 m were higher than most Ambystoma species. However, during the study period, none reached neighboring stock tanks. We found high mortality due to predation and desiccation. Individuals that dispersed to terrestrial habitat in summer survived longer than individuals that dispersed in spring. High mortality suggests terrestrial movement is exceptionally risky and may contribute to isolated subpopulations and elevated levels of inbreeding. Conservation actions that improve and maintain artificial aquatic habitats as well as increase connectivity may improve long-term management for pond-breeding amphibians in arid regions. Dispersal is the only means of responding to aquatic threats in arid landscapes and thus is critical for maintenance of population dynamics. We studied the movement ecology and survival upon terrestrial movement of the federally endangered Sonoran tiger salamanders (Ambystoma mavortium stebbinsi) endemic to the southeast Arizona, USA. High mortality suggests terrestrial movement is exceptionally risky and may contribute to isolated subpopulations and elevated levels of inbreeding caused by rare reaching of neighboring stock tanks.image
英文关键词	Ambystoma mavortium stebbinsi Arizona connectivity desert endangered species survival
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001202838700001
WOS关键词	TIGRINUM-STEBBINSI LOWE ; TIGER SALAMANDER ; AMBYSTOMA-TIGRINUM ; HABITAT USE ; SPOTTED SALAMANDERS ; BODY CONDITION ; FACULTATIVE PEDOMORPHOSIS ; LIFE-HISTORY ; BUFFER ZONES ; HOME-RANGE
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403455
推荐引用方式 GB/T 7714	Brocka, Colin W.,Mazzamuto, Maria Vittoria,Koprowski, John L.. The high cost of movement in an arid working landscape for an endangered amphibian[J],2024,14(4).
APA	Brocka, Colin W.,Mazzamuto, Maria Vittoria,&Koprowski, John L..(2024).The high cost of movement in an arid working landscape for an endangered amphibian.ECOLOGY AND EVOLUTION,14(4).
MLA	Brocka, Colin W.,et al."The high cost of movement in an arid working landscape for an endangered amphibian".ECOLOGY AND EVOLUTION 14.4(2024).