气候变化领域集成服务门户(CCPortal): Stage-Specific Demographic Effects of Hydrologic Variation in a Stream Salamander

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DOI	10.1086/729466
	Stage-Specific Demographic Effects of Hydrologic Variation in a Stream Salamander
	Cochrane, Madaline M.; Addis, Brett R.; Lowe, Winsor H.
发表日期	2024
ISSN	0003-0147
EISSN	1537-5323
起始页码	203
结束页码	5
卷号	203 期号:5
英文摘要	We lack a strong understanding of how organisms with complex life histories respond to climate variation. Many stream-associated species have multistage life histories that are likely to influence the demographic consequences of floods and droughts. However, tracking stage-specific demographic responses requires high-resolution, long-term data that are rare. We used 8 years of capture-recapture data for the headwater stream salamander Gyrinophilus porphyriticus to quantify the effects of flooding and drying magnitude on stage-specific vital rates and population growth. Drying reduced larval recruitment but increased the probability of metamorphosis (i.e., adult recruitment). Flooding reduced adult recruitment but had no effect on larval recruitment. Larval and adult survival declined with flooding but were unaffected by drying. Annual population growth rates (lambda) declined with flooding and drying. Lambda also declined over the study period (2012-2021), although mean lambda was 1.0 over this period. Our results indicate that G. porphyriticus populations are resilient to hydrologic variation because of compensatory effects on recruitment of larvae versus adults (i.e., reproduction vs. metamorphosis). Complex life cycles may enable this resilience to climate variation by creating opportunities for compensatory demographic responses across stages. However, more frequent and intense hydrologic variation in the latter half of this study contributed to a decline in lambda over time, suggesting that increasing environmental variability poses a threat even when demographic compensation occurs.
英文关键词	climate change; complex life cycle; demographic compensation; Gyrinophilus porphyriticus; recruitment; survival
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Ecology ; Evolutionary Biology
WOS记录号	WOS:001194474000001
来源期刊	AMERICAN NATURALIST
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/288793
作者单位	University of Montana System; University of Montana; University of Wyoming; Montana State University System; Montana State University Bozeman
推荐引用方式 GB/T 7714	Cochrane, Madaline M.,Addis, Brett R.,Lowe, Winsor H.. Stage-Specific Demographic Effects of Hydrologic Variation in a Stream Salamander[J],2024,203(5).
APA	Cochrane, Madaline M.,Addis, Brett R.,&Lowe, Winsor H..(2024).Stage-Specific Demographic Effects of Hydrologic Variation in a Stream Salamander.AMERICAN NATURALIST,203(5).
MLA	Cochrane, Madaline M.,et al."Stage-Specific Demographic Effects of Hydrologic Variation in a Stream Salamander".AMERICAN NATURALIST 203.5(2024).