Feral equids’ varied effects on ecosystems

doi:10.1126/science.abl5863

GSTDTAP > 气候变化

DOI	10.1126/science.abl5863
	Feral equids’ varied effects on ecosystems
	Esther S. Rubin; Dave Conrad; Andrew S. Jones; John J. Hervert
	2021-08-27
发表期刊	Science
出版年	2021
英文摘要	In their Report “Equids engineer desert water availability” (30 April, p. [491][1]), E. J. Lundgren and coauthors present observations of feral burros digging shallow wells and suggest that these wells may benefit native wildlife and ecosystems by increasing the number of water sites. The authors consider feral equids (horses and burros) to be beneficial but fail to acknowledge substantial research establishing the many negative effects that feral equids have on arid ecosystems. The positive view presented by Lundgren et al. is troubling because growing feral equid populations in the western United States are a serious concern for natural resource managers ([ 1 ][2]). Feral equids compete with native wildlife for food and water and displace native ungulates from water ([ 2 ][3]–[ 5 ][4]). Their presence has been associated with decreased diversity of native species at water, and native species have been observed to visit water less frequently and spend less time at water when equids are present ([ 6 ][5]). Reduced access to water is particularly detrimental in arid landscapes, especially during drought. The addition of a small number of shallow wells does not benefit native wildlife when their overall access to water is reduced by equids. Lundgren et al. present no data to demonstrate an overall benefit to wildlife. We urge caution in speculating that the addition of a few localized wells benefits native species. Feral equids have also altered plant composition, reduced plant diversity and cover, and increased soil compaction and erosion ([ 7 ][6]–[ 9 ][7]), thereby putting native habitats at risk. This, together with poorly controlled equid population growth, results in degraded habitats with decreased carrying capacities. 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领域	气候变化 ; 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/336620
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Esther S. Rubin,Dave Conrad,Andrew S. Jones,等. Feral equids’ varied effects on ecosystems[J]. Science,2021.
APA	Esther S. Rubin,Dave Conrad,Andrew S. Jones,&John J. Hervert.(2021).Feral equids’ varied effects on ecosystems.Science.
MLA	Esther S. Rubin,et al."Feral equids’ varied effects on ecosystems".Science (2021).