PLANT INVASIONS AND THE ROLE OF RIPARIAN HABITATS - A COMPARISON OF 4 SPECIES ALIEN TO CENTRAL-EUROPE
PLANT INVASIONS AND THE ROLE OF RIPARIAN HABITATS - A COMPARISON OF 4 SPECIES ALIEN TO CENTRAL-EUROPE
复制标题
DOI：
10.2307/2845589
复制
发表时间：
1993-07-01
影响因子：
3.9
通讯作者：
PRACH, K
中科院分区：
文献类型：
--
作者：
PYSEK, P;PRACH, K
本文比较了4种中欧外来植物和不同生活型中生长最高的代表性植物：一年生的腺叶凤仙花（Impatiens glandulifera）、多年生单性果实独活（Heracleum mantegazzianum）、Reynoutria japonica和杜鹃花（R.多果多年生植物。这些物种在捷克共和国的分布是根据植物区系数据重建的。使用从引入到现在报告的累积地点数量进行比较。发现指数回归模型最能拟合地点累积数量随时间的增加，斜率B被认为是入侵率的一个方便的量度。按入侵下降率排序为：Ⅰ.有腺牛肝菌属（glandulifera）、日本牛肝菌属（Reynoutria japonica）、毛叶独活属（Heracleum mantegazzianum）、毛叶独活R.萨氏藻在河岸生境中，如果将它们分开处理，入侵率按以下顺序降低：I. glandulifera)、荷花蔷薇(R. sachalinensis、萨氏R. japonica，H.曼特加济安传播的滞后期和指数期被区分开来，入侵开始的时间估计在1936年。glandulifera，1938年在R. japonica，1943在H. mantegazzianum和1952在R.萨氏藻H. mantegazzianum和I.腺孢类在到达研究区域的少数地点后开始呈指数扩散，在指数期的入侵率高于两种Reynoutria，而Reynoutria的入侵率更为均匀。在扩散的滞后阶段和指数阶段，不同物种的栖息地偏好都不同。不同物种对河岸生境的亲和性存在差异。在区域尺度上，就物种的自身生态学和适宜生境的频率，讨论了河流廊道在鼓励植物入侵中的作用。
We compared the rate of invasion of four plant species which are alien to central Europe and the highest-growing representatives of different life-forms: Impatiens glandulifera (annual), Heracleum mantegazzianum (monocarpic perennial), Reynoutria japonica and R. sachalinensis (polycarpic perennials). The spread of these species in the Czech Republic was reconstructed on the basis of floristic data. Cumulative numbers of localities reported from the time of introduction to the present were used for comparison. Exponential regression models were found to best fit the increase in the cumulative number of localities over time and the slope b was considered a convenient measure of the invasion rate. The ranking of species according to the decreasing rate of invasion was: I. glandulifera, Reynoutria japonica, Heracleum mantegazzianum, R. sachalinensis. The rate of invasion in riparian habitats, if these were treated separately, decreased in the following order: I. glandulifera, R. sachalinensis, R. japonica, H. mantegazzianum. The lag and exponential phases of spread were distinguished and the timing of the beginning of invasion was estimated at 1936 in I. glandulifera, 1938 in R. japonica, 1943 in H. mantegazzianum and 1952 in R. sachalinensis. H. mantegazzianum and I. glandulifera began to spread exponentially after having reached only a few localities in the area studied and their invasion rates during the exponential phase were higher than those of both Reynoutria species, whose invasion proceeded at a more even rate. Habitat preferences differed between species in both lag and exponential phases of spread. Different patterns of affinity to riparian habitats were found among the species studied. The role of river corridors in encouraging plant invasions is discussed on the regional scale with respect to the autecology of the species and frequency of suitable habitats.