Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2101614118 |
Variable strategies to solve risk–reward tradeoffs in carnivore communities | |
Joel Ruprecht; Charlotte E. Eriksson; Tavis D. Forrester; Derek B. Spitz; Darren A. Clark; Michael J. Wisdom; Marcus Bianco; Mary M. Rowland; Joshua B. Smith; Bruce K. Johnson; Taal Levi | |
2021-08-31 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2021 |
英文摘要 | Mesopredator release theory suggests that dominant predators suppress subordinate carnivores and ultimately shape community dynamics, but the assumption that subordinate species are only negatively affected ignores the possibility of facilitation through scavenging. We examined the interplay within a carnivore community consisting of cougars, coyotes, black bears, and bobcats using contemporaneous Global Positioning System telemetry data from 51 individuals; diet analysis from 972 DNA-metabarcoded scats; and data from 128 physical investigations of cougar kill sites, 28 of which were monitored with remote cameras. Resource provisioning from competitively dominant cougars to coyotes through scavenging was so prolific as to be an overwhelming determinant of coyote behavior, space use, and resource acquisition. This was evident via the strong attraction of coyotes to cougar kill sites, frequent scavenging of cougar-killed prey, and coyote diets that nearly matched cougars in the magnitude of ungulate consumption. Yet coyotes were often killed by cougars and used space to minimize encounters, complicating the fitness benefits gained from scavenging. We estimated that 23% (95% CI: 8 to 55%) of the coyote population in our study area was killed by cougars annually, suggesting that coyote interactions with cougars are a complex behavioral game of risk and reward. In contrast, we found no indication that bobcat space use or diet was influenced by cougars. Black bears avoided cougars, but there was no evidence of attraction to cougar kill sites and much lower levels of ungulate consumption and carcass visitation than for coyotes. Interspecific interactions among carnivores are multifaceted, encompassing both suppression and facilitation. |
领域 | 资源环境 |
URL | 查看原文 |
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/336596 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Joel Ruprecht,Charlotte E. Eriksson,Tavis D. Forrester,等. Variable strategies to solve risk–reward tradeoffs in carnivore communities[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Joel Ruprecht.,Charlotte E. Eriksson.,Tavis D. Forrester.,Derek B. Spitz.,Darren A. Clark.,...&Taal Levi.(2021).Variable strategies to solve risk–reward tradeoffs in carnivore communities.Proceedings of the National Academy of Sciences. |
MLA | Joel Ruprecht,et al."Variable strategies to solve risk–reward tradeoffs in carnivore communities".Proceedings of the National Academy of Sciences (2021). |
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