Evaluation of Dune Rehabilitation after 95 Years by Comparison of Vegetation in Disturbed and Natural Sites
Evaluation of Dune Rehabilitation after 95 Years by Comparison of Vegetation in Disturbed and Natural Sites
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DOI：
10.2112/jcoastres-d-11-00056.1
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发表时间：
2012-09-01
影响因子：
--
通讯作者：
Angiolini, Claudia
中科院分区：
文献类型：
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作者：
Landi, Marco;Ricceri, Cecilia;Angiolini, Claudia
干扰和自然的网站进行了比较，在恢复海岸沙丘带的第勒尼安海岸的意大利。其目的是通过比较三种不同植被类型的结构和植物组成来评估恢复的成功。植被属性被用来指示植被动态的轨迹，通过记录这些参数的增加或减少。使用多变量方法研究了属性的变化和成分的相似性。在一般情况下，显着的变化之间的干扰和自然的网站表示减少，每年禾本科植物，树木，风传播的物种和稀有物种的增加。在恢复的网站，有很高的招聘率的风传播的物种，和康复似乎已经成功的角度来看，每年的禾本科植物的减少和稀有物种的增加。然而，每种植被类型的沙丘环境与不同数量的属性和不同的恢复成功。具体而言：（一）从结构和物种组成的角度来看，三个地点中，沿着漂流线生长着一年生植被的开阔沙地最为相似，因此最容易恢复;（二）部分或密集生长着草本植物的沙丘显示出自然地点中稀有物种的增加，其特点是恢复成功;（三）沙丘上灌木丛生，各地点之间差异很大，因此最难恢复。我们的比较表明，最初的规划工作应该集中在这最后一种类型的植被覆盖。
Disturbed and natural sites are compared in a belt of rehabilitated coastal dune on the Tyrrhenian coast of Italy. The goal was to evaluate rehabilitation success by comparing structure and plant composition in three different vegetation types. Vegetational attributes were used to indicate the trajectory of the vegetation dynamic, by recording increases or decreases in these parameters. The variations in attributes and similarities in composition were investigated using multivariate methods. In general, significant changes between the disturbed and natural sites were indicated by a decrease in annual graminoids, trees, and wind-dispersal species and an increase in rare species. In the rehabilitated site, there was a high rate of recruitment of wind-dispersal species, and rehabilitation seems to have been successful from the point of view of the decrease in annual graminoids and increase in rare species. However, each vegetation type of dune environment was associated with a different number of attributes and different rehabilitation success. Specifically: (i) open sands with annual vegetation growing along drift lines were the most similar among the three sites, from the point of view of both structure and species composition, and are therefore the easiest to rehabilitate; (ii) dunes partially or densely vegetated by herbaceous species showed an increase in rare species in the natural site and were characterized by successful rehabilitation; (iii) dunes densely vegetated by shrubs differed significantly between sites and are consequently the most difficult to rehabilitate. Our comparisons suggest that initial planning efforts should focus on this last type of vegetation cover.