Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14595 |
Predator-mediated effects of severe drought associated with poor reproductive success of a seabird in a cross-ecosystem cascade | |
Thomsen, Sarah K.; Green, David J. | |
2019-05-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:5页码:1642-1652 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Despite the profound impacts of drought on terrestrial productivity in coastal arid ecosystems, only a few studies have addressed how drought can influence ecological cascades across ecosystem boundaries. In this study, we examine the consequences of rainfall pulses and drought that subsequently impact the breeding success of a threatened nocturnal seabird, the Scripps's Murrelet (Synthliboramphus scrippsi). On an island off the coast of southern California, the main cause of reduced nest success for one of their largest breeding colonies is egg predation by an endemic deer mouse (Peromyscus maniculatus elusus). Mice on the island have an opportunistic diet of primarily terrestrial sources, but drastic declines in terrestrial productivity from drought might be expected to increase their reliance on marine resources, including murrelet eggs. We compiled data on terrestrial and marine productivity between 1983 and 2013 to determine how conditions in these ecosystems influence murrelet nest success. We found that the severity of drought had the strongest negative impact on murrelet nest success. We calculated that the reduction in fecundity during drought years due to increased egg predation by mice was substantial enough to produce a declining population growth rate. Nest success was much higher under normal or high rainfall conditions, depending on whether oceanic conditions were favorable to murrelets. Therefore, the more frequent and severe drought that is projected for this region could lead to an increased risk of murrelet population decline on this island. Our study highlights the need for understanding how species interactions will change through the effects of increasing drought and altered rainfall regimes under global change. |
英文关键词 | cross-ecosystem cascade drought indirect effects predation rainfall seabirds |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465103600007 |
WOS关键词 | SANTA-BARBARA ISLAND ; TERRESTRIAL ECOSYSTEMS ; ENVIRONMENTAL-CHANGE ; SPECIES INTERACTIONS ; POPULATION-DYNAMICS ; CLIMATE VARIABILITY ; THREATENED SEABIRD ; WATER AVAILABILITY ; PULSED RESOURCES ; EGG NEGLECT |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182915 |
专题 | 气候变化 资源环境科学 |
作者单位 | Simon Fraser Univ, Dept Biol Sci, Burnaby, BC, Canada |
推荐引用方式 GB/T 7714 | Thomsen, Sarah K.,Green, David J.. Predator-mediated effects of severe drought associated with poor reproductive success of a seabird in a cross-ecosystem cascade[J]. GLOBAL CHANGE BIOLOGY,2019,25(5):1642-1652. |
APA | Thomsen, Sarah K.,&Green, David J..(2019).Predator-mediated effects of severe drought associated with poor reproductive success of a seabird in a cross-ecosystem cascade.GLOBAL CHANGE BIOLOGY,25(5),1642-1652. |
MLA | Thomsen, Sarah K.,et al."Predator-mediated effects of severe drought associated with poor reproductive success of a seabird in a cross-ecosystem cascade".GLOBAL CHANGE BIOLOGY 25.5(2019):1642-1652. |
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