Drivers of Plant Invasion at Broad and Fine Scale in Short Temperate Streams
Drivers of Plant Invasion at Broad and Fine Scale in Short Temperate Streams
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温带短流中植物大规模和精细入侵的驱动因素
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
I. Biurrun
中科院分区：
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作者：
D. Liendo;I. García‐Mijangos;J. A. Campos;U. López;I. Biurrun
河岸生态系统被描述为非常容易受到外来植物入侵，因此，解开入侵过程中的贡献因素是至关重要的保护和管理这些宝贵的生态系统。在这项研究中，我们研究了16个坎塔布连河流域（西班牙北方）河岸植物入侵的驱动因素，范围从100到约100。1050平方公里。为这些盆地内随机选择的五个地点确定了完整的植物群。在80个采样点中发现了130种外来植物，占记录的总植物群的21%。在网站规模，植物入侵的水平，衡量为外来丰富度（AR）和相对外来丰富度（RAR），进行了评估，在一组解释变量的广义线性混合模型。这种入侵水平受到环境变量的影响，如温度指数，平均河床宽度和植物群落数量，以及人类相关变量，如到最近城镇的距离和周围城市土地的比例。在流域尺度上，工业化的河流流域比非工业化的流域受到更严重的入侵，它们在外来植物组成上都有所不同。鉴于发生在坎塔布连流的一些外来物种特别丰富（Crocosmia x crocosmiiflora）和/或形成非常密集的看台（Fallopia japonica，Paspalum distichum），未来的研究应该集中在驱动程序，影响这些物种的存在和分布的特别关注。版权所有© 2016约翰威利父子有限公司.
Riparian ecosystems have been described as highly prone to alien plant invasions; thus, disentangling the contributing factors of the invasion process is of utmost importance to conserving and managing these valuable ecosystems. In this study we examined the drivers of riparian plant invasion in 16 Cantabrian river basins (northern Spain) ranging from 100 to ca. 1050 km2. A complete flora was determined for five randomly selected sites within those basins. One hundred and thirty alien plant species were found across the 80 sampling sites, representing 21% of the recorded total flora. At site scale, the level of plant invasion, measured as alien richness (AR) and relative alien richness (RAR), was assessed in relation to a set of explanatory variables by means of Generalised Linear Mixed Models. This level of invasion was influenced by environmental variables such as the thermicity index, the average riverbed width and the number of plant communities and by human‐related variables such as the distance to the nearest town and the proportion of surrounding urban land. At basin scale, industrialised river basins were more heavily invaded than non‐industrialised basins, and they both differed in their alien plant composition. Given that some of the alien species occurring in Cantabrian streams are specially abundant (Crocosmia x crocosmiiflora) and/or form very dense stands (Fallopia japonica, Paspalum distichum), future research should focus on the drivers that influence the presence and distribution of these species of special concern. Copyright © 2016 John Wiley & Sons, Ltd.