Arid
DOI10.1016/j.biocon.2017.03.004
Informing recovery in a human-transformed landscape: Drought-mediated coexistence alters population trends of an imperiled salamander and invasive predators
Hossack, Blake R.1; Honeycutt, R. Ken1; Sigafus, Brent H.2; Muths, Erin3; Crawford, Catherine L.4; Jones, Thomas R.5; Sorensen, Jeff A.5; Rorabaugh, James C.6; Chambert, Thierry7,8
通讯作者Hossack, Blake R.
来源期刊BIOLOGICAL CONSERVATION
ISSN0006-3207
EISSN1873-2917
出版年2017
卷号209页码:377-394
英文摘要

Understanding the additive or interactive threats of habitat transformation and invasive species is critical for conservation, especially where climate change is expected to increase the severity or frequency of drought. In the arid southwestern USA, this combination of stressors has caused widespread declines of native aquatic and semi-aquatic species. Achieving resilience to drought and other effects of climate change may depend upon continued management, so understanding the combined effects of stressors is important. We used Bayesian hierarchical models fitted with 10-years of pond-based monitoring surveys for the federally-endangered Sonoran Tiger Salamander (Ambystoma mavortium stebbinsi) and invasive predators (fishes and American Bullfrogs, Lithobates catesbeianus) that threaten native species. We estimated trends in occupancy of salamanders and invasive predators while accounting for hydrological dynamics of ponds, then used a two-species interaction model to directly estimate how invasive predators affected salamander occupancy. We also tested a conceptual model that predicted that drought, by limiting the distribution of invasive predators, could ultimately benefit native species. Even though occupancy of invasive predators was stationary and their presence in a pond reduced the probability of salamander presence by 23%, occupancy of Sonoran Tiger Salamanders increased, annually, by 2.2%. Occupancy of salamanders and invasive predators both declined dramatically following the 5th consecutive year of drought. Salamander occupancy recovered quickly after return to non-drought conditions, while occupancy of invasive predators remained suppressed. Models that incorporated three time-lagged periods (1 to 4 years) of local moisture conditions confirmed that salamanders and invasive predators responded differently to drought, reflecting how life-history strategies shape responses to disturbances. The positive 10-year trend in salamander occupancy and their rapid recovery after drought provided partial support for the hypothesis of drought-mediated coexistence with invasive predators. These results also suggest management opportunities for conservation of the Sonoran Tiger Salamander and other imperiled organisms in human-transformed landscapes. Published by Elsevier Ltd.


英文关键词Amphibian Bullfrog Climate resilience Drought Fragmentation Invasive species
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000404308600042
WOS关键词CLIMATE-CHANGE ; HABITAT FRAGMENTATION ; TIGER SALAMANDERS ; EXTINCTION RISK ; DISTURBANCE ; OCCUPANCY ; FISHES ; TRANSMISSION ; COOCCURRENCE ; FREQUENCY
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197829
作者单位1.US Geol Survey, Northern Rocky Mt Sci Ctr, Aldo Leopold Wilderness Res Inst, 790 E Beckwith Ave, Missoula, MT 59801 USA;
2.US Geol Survey, Southwest Biol Sci Ctr, Tucson, AZ 85719 USA;
3.US Geol Survey, Ft Collins Sci Ctr, 2150 Ctr Ave,Bldg C, Ft Collins, CO 80526 USA;
4.US Fish & Wildlife Serv, 201 N Bonita Ave,Suite 141, Tucson, AZ 85745 USA;
5.Arizona Game & Fish Dept, 5000 W Carefree Hwy, Phoenix, AZ 85086 USA;
6.US Fish & Wildlife Serv, POB 31, St David, AZ 85630 USA;
7.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA;
8.US Geol Survey, Patuxent Wildlife Res Ctr, Laurel, MD 20708 USA
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Hossack, Blake R.,Honeycutt, R. Ken,Sigafus, Brent H.,et al. Informing recovery in a human-transformed landscape: Drought-mediated coexistence alters population trends of an imperiled salamander and invasive predators[J],2017,209:377-394.
APA Hossack, Blake R..,Honeycutt, R. Ken.,Sigafus, Brent H..,Muths, Erin.,Crawford, Catherine L..,...&Chambert, Thierry.(2017).Informing recovery in a human-transformed landscape: Drought-mediated coexistence alters population trends of an imperiled salamander and invasive predators.BIOLOGICAL CONSERVATION,209,377-394.
MLA Hossack, Blake R.,et al."Informing recovery in a human-transformed landscape: Drought-mediated coexistence alters population trends of an imperiled salamander and invasive predators".BIOLOGICAL CONSERVATION 209(2017):377-394.
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