Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13408 |
Increased autumn rainfall disrupts predator-prey interactions in fragmented boreal forests | |
Terraube, Julien1; Villers, Alexandre1,2; Poudre, Leo3; Varjonen, Rauno1; Korpimaki, Erkki1 | |
2017-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
![]() |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; France |
英文摘要 | There is a pressing need to understand how changing climate interacts with land-use change to affect predator-prey interactions in fragmented landscapes. This is particularly true in boreal ecosystems facing fast climate change and intensification in forestry practices. Here, we investigated the relative influence of autumn climate and habitat quality on the food-storing behaviour of a generalist predator, the pygmy owl, using a unique data set of 15 850 prey items recorded in western Finland over 12 years. Our results highlighted strong effects of autumn climate (number of days with rainfall and with temperature < 0 degrees C) on food-store composition. Increasing frequency of days with precipitation in autumn triggered a decrease in (i) total prey biomass stored, (ii) the number of bank voles (main prey) stored, and (iii) the scaled mass index of pygmy owls. Increasing proportions of old spruce forests strengthened the functional response of owls to variations in vole abundance and were more prone to switch from main prey to alternative prey (passerine birds) depending on local climate conditions. High-quality habitat may allow pygmy owls to buffer negative effects of inclement weather and cyclic variation in vole abundance. Additionally, our results evidenced sexspecific trends in body condition, as the scaled mass index of smaller males increased while the scaled mass index of larger females decreased over the study period, probably due to sex-specific foraging strategies and energy requirements. Long-term temporal stability in local vole abundance refutes the hypothesis of climate-driven change in vole abundance and suggests that rainier autumns could reduce the vulnerability of small mammals to predation by pygmy owls. As small rodents are key prey species for many predators in northern ecosystems, our findings raise concern about the impact of global change on boreal food webs through changes in main prey vulnerability. |
英文关键词 | body condition climate change diet shifts Eurasian pygmy owl foraging behaviour habitat loss intensive forestry practices |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396836800001 |
WOS关键词 | CLIMATE-CHANGE ; HABITAT SELECTION ; PYGMY OWLS ; GLAUCIDIUM-PASSERINUM ; REPRODUCTIVE SUCCESS ; BIOTIC INTERACTIONS ; SEASONAL DECLINE ; CLUTCH SIZE ; NORTHERN ; POPULATION |
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/16956 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Turku, Sect Ecol, Dept Biol, FI-20014 Turku, Finland; 2.Univ Rochelle, CNRS, Ctr Etud Biol Chize, UMR7372, FR-79360 Villiers En Bois, France; 3.Parc Nat Reg Haut Jura, Maison Parc Haut Jura, F-39310 Lajoux, France |
推荐引用方式 GB/T 7714 | Terraube, Julien,Villers, Alexandre,Poudre, Leo,et al. Increased autumn rainfall disrupts predator-prey interactions in fragmented boreal forests[J]. GLOBAL CHANGE BIOLOGY,2017,23(4). |
APA | Terraube, Julien,Villers, Alexandre,Poudre, Leo,Varjonen, Rauno,&Korpimaki, Erkki.(2017).Increased autumn rainfall disrupts predator-prey interactions in fragmented boreal forests.GLOBAL CHANGE BIOLOGY,23(4). |
MLA | Terraube, Julien,et al."Increased autumn rainfall disrupts predator-prey interactions in fragmented boreal forests".GLOBAL CHANGE BIOLOGY 23.4(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论