Woody Invasions of Urban Trails and the Changing Face of Urban Forests in the Great Plains, USA
Woody Invasions of Urban Trails and the Changing Face of Urban Forests in the Great Plains, USA
复制标题
美国大平原城市步道的木质入侵和城市森林的变化
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
B. Stephen
中科院分区：
文献类型：
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作者：
K. Nemec;C. Allen;A. Alai;Gregory M. Clements;Andrew C. Kessler;Travis C. Kinsell;A. Major;B. Stephen
道路和小径等廊道可以促进外来植物物种的入侵。与廊道相关的开放、受干扰的栖息地为许多非本地植物物种提供了有利的生长条件。自行车道是许多城市地区常见的走廊系统，尚未对其在植物入侵中的潜在作用进行研究。我们选取了内布拉斯加州林肯市沿自行车道的五个线性城市森林片段，以评估相对于廊道的木本非本地物种的入侵，并评估这些城市森林的组成。植物种类以本地种为主，但也有白桑树（Morus alba）、鼠李（Rhamnus cathartica）、天树（Ailanthus altissima）、金银花（Lonicera spp）和榆树（Ulmus spp） 5种非本地种。随着距离植被源斑块的增加，沙棘和金银花两种木本植物的分布显著减少（P = 0.031和0.030）。这些线性生境正受到外来乔灌木物种的入侵，可能会改变这些城市森林走廊的结构。如果未来外来木本植物种类变得丰富，它们可能会使这些地区的植物群落同质化，降低当地的生物多样性。
Abstract Corridors such as roads and trails can facilitate invasions by non-native plant species. The open, disturbed habitat associated with corridors provides favorable growing conditions for many non-native plant species. Bike trails are a corridor system common to many urban areas that have not been studied for their potential role in plant invasions. We sampled five linear segments of urban forest along bike trails in Lincoln, Nebraska to assess the invasion of woody non-native species relative to corridors and to assess the composition of these urban forests. The most abundant plant species were generally native species, but five non-native species were also present: white mulberry (Morus alba), common buckthorn (Rhamnus cathartica), tree-of-heaven (Ailanthus altissima), honeysuckle (Lonicera spp.) and elm (Ulmus spp.). The distribution of two of the woody species sampled, common buckthorn and honeysuckle, significantly decreased with increasing distance from a source patch of vegetation (P = 0.031 and 0.030). These linear habitats are being invaded by non-native tree and shrub species, which may change the structure of these urban forest corridors. If non-native woody plant species become abundant in the future, they may homogenize the plant community and reduce native biodiversity in these areas.