Rangelands in a fragmented grass-dominated landscape are vulnerable to tree invasion from roadsides
Rangelands in a fragmented grass-dominated landscape are vulnerable to tree invasion from roadsides
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以草为主的破碎景观中的牧场很容易受到路边树木的入侵
DOI：
10.1007/s10530-022-02869-5
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发表时间：
2022
影响因子：
2.9
通讯作者：
Allen, Craig R.
中科院分区：
文献类型：
--
作者：
Hogan, Katharine F.;Fogarty, Dillon T.;Ellerman, Hugh;Fill, Christopher T.;Morales, D.;Seguin, Baxter;Uden, Daniel R.;Allen, Craig R.
路边可以通过分割景观和促进繁殖体向内部栖息地传播，成为牧场内树木入侵的载体。目前北美大平原的入侵树木管理侧重于通过现场预防和根除来减少现场（即内部栖息地）的脆弱性，但对已知作为入侵媒介的周边地区（如路边和公共路权）的入侵树木管理是零星的。我们调查了大平原中部草地景观的路边入侵树木繁殖源，以确定周围景观有多少可能容易受到路边入侵，以及哪些物种，从而为未来土地覆盖变化的位置和形式提供见解。入侵树种在路边分布广泛。考虑到100-200米的适度传播距离，我们的研究结果表明，路边有可能成为牧场暴露于树木入侵的主要来源，在研究区危及高达44%的牧场。在这些散布距离下，由于路边传播源的影响，用于移除牧场上树木的资金可能对景观的整体脆弱性影响不大。这项研究的一个关键意义是，路边虽然经常被管理忽视，但却代表了减少牧场对树木入侵脆弱性的综合管理战略的重要组成部分。
Roadsides can be vectors for tree invasion within rangelands by bisecting landscapes and facilitating propagule spread to interior habitat. Current invasive tree management in North America’s Great Plains focuses on reducing on-site (i.e., interior habitat) vulnerability through on-site prevention and eradication, but invasive tree management of surrounding areas known to serve as invasion vectors, such as roadsides and public rights-of-ways, is sporadic. We surveyed roadsides for invasive tree propagule sources in a central Great Plains grassland landscape to determine how much of the surrounding landscape is potentially vulnerable to roadside invasion, and by which species, and thereby provide insights into the locations and forms of future landcover change. Invasive tree species were widespread in roadsides. Given modest seed dispersal distances of 100–200 m, our results show that roadsides have potential to serve as major sources of rangeland exposure to tree invasion, compromising up to 44% of rangelands in the study area. Under these dispersal distances, funds spent removing trees on rangeland properties may have little impact on the landscape’s overall vulnerability, due to exposure driven by roadside propagule sources. A key implication from this study is that roadsides, while often neglected from management, represent an important component of integrated management strategies for reducing rangeland vulnerability to tree invasion.
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DOI：
--
发表时间：
1985
期刊：
影响因子：
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作者：
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DOI：
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发表时间：
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影响因子：
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作者：
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W. Schacht
影响因子：
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作者：
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