Invasibility of Species‐Rich Communities in Riparian Zones

作者：Anne‐Marie Planty‐Tabacchi, Éric Tabacchi, Robert J. Naiman, Collette M. DeFerrari, Henri Décamps · 发表于：Conservation Biology · 年份：1996 · DOI：10.1046/j.1523-1739.1996.10020598.x · 被引用次数：541 · 研究领域：Hydrology and Sediment Transport Processes、Ecology and Vegetation Dynamics Studies、Coastal wetland ecosystem dynamics

Invasibility of riparian plant communities was estimated by the percentage of alien species found along the Adour River (Southwest France) and along Lockout Creek, McKenzie River, and Willamette River (Central Cascades, Oregon, U.S.A.). At the patch scale, the invasibilities of riparian plant communities were compared between one exceptionally rich site of the Adour River and patches selected in the Hoh and Dungeness watersheds (Olympic Peninsula, Washington, U.S.A.). Alien species represented 24% of 1396 species for the Adour and 30% of 851 species for the McKenzie. They represented 24% of 148 species for the Hoh drainage and 28% of 200 species for the Dungeness drainage. Similar trends were found along the Adour River and along the McKenzie River for changes in total number of species per site and in percentages of alien species per site. These trends may be related to the intermediate disturbance regimes and to the physical structure of the riparian corridors. Climatic and human factors are also involved in these longitudinal changes. Positive linear relationships were found between the total number of species and the percentage of aliens observed in each site. At the patch scale, most of the sampled communities contained alien species. Although mature vegetative patches appeared to be invasible, young communities contained more alien species than older ones. For entire corridors, a positive linear relationship was found between total species richness and percentage of ali...