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人类活动的空间异质性有利于狼在农业生态系统中的持续存在。

Spatial heterogeneity in human activities favors the persistence of wolves in agroecosystems.

作者信息

Ahmadi Mohsen, López-Bao José Vicente, Kaboli Mohammad

机构信息

Department of Environmental Sciences, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

Research Unit of Biodiversity (UO/CSIC/PA), Oviedo University, Mieres, Spain; Grimsö Wildlife Research Station, Dep. of Ecology, Swedish University of Agricultural Sciences (SLU), Riddarhyttan, Sweden.

出版信息

PLoS One. 2014 Sep 24;9(9):e108080. doi: 10.1371/journal.pone.0108080. eCollection 2014.

Abstract

As human populations expand, there is increasing demand and pressure for land. Under this scenario, behavioural flexibility and adaptation become important processes leading to the persistence of large carnivores in human-dominated landscapes such as agroecosystems. A growing interest has recently emerged on the outcome of the coexistence between wolves and humans in these systems. It has been suggested that spatial heterogeneity in human activities would be a major environmental factor modulating vulnerability and persistence of this contentious species in agroecosystems. Here, we combined information from 35 den sites detected between 2011 and 2012 in agroecosystems of western Iran (Hamedan province), a set of environmental variables measured at landscape and fine spatial scales, and generalized linear models to identify patterns of den site selection by wolves in a highly-modified agroecosystem. On a landscape level, wolves selected a mixture of rangelands with scattered dry-farms on hillsides (showing a low human use) to locate their dens, avoiding areas with high densities of settlements and primary roads. On a fine spatial scale, wolves primarily excavated dens into the sides of elevated steep-slope hills with availability of water bodies in the vicinity of den sites, and wolves were relegated to dig in places with coarse-soil particles. Our results suggest that vulnerability of wolves in human-dominated landscapes could be compensated by the existence of spatial heterogeneity in human activities. Such heterogeneity would favor wolf persistence in agroecosystems favoring a land sharing model of coexistence between wolves and people.

摘要

随着人类人口的增长,对土地的需求和压力与日俱增。在这种情况下,行为灵活性和适应性成为大型食肉动物在农业生态系统等人类主导景观中得以存续的重要过程。最近,人们对这些系统中狼与人类共存的结果越来越感兴趣。有人提出,人类活动的空间异质性将是调节这种有争议物种在农业生态系统中的脆弱性和存续的主要环境因素。在此,我们结合了2011年至2012年在伊朗西部(哈马丹省)农业生态系统中检测到的35个狼窝点的信息、在景观和精细空间尺度上测量的一组环境变量,以及广义线性模型,以确定在高度改造的农业生态系统中狼选择狼窝点的模式。在景观层面,狼选择了山坡上散布着旱地农田的牧场(人类活动较少)的混合区域来建造它们的巢穴,避开居民点和主要道路密度高的区域。在精细空间尺度上,狼主要在地势较高的陡坡山坡侧面挖掘巢穴,巢穴附近有水体,并且狼只能在土壤颗粒较粗的地方挖掘。我们的结果表明,人类主导景观中狼的脆弱性可以通过人类活动中空间异质性的存在得到补偿。这种异质性将有利于狼在农业生态系统中的存续,有利于狼与人类之间土地共享的共存模式。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee0a/4176725/330c4be36448/pone.0108080.g001.jpg

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