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首页> 外文期刊>Ecological research >Ecological drivers of plant diversity patterns in remnants coastal sand dune ecosystems along the northern Adriatic coastline
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Ecological drivers of plant diversity patterns in remnants coastal sand dune ecosystems along the northern Adriatic coastline

机译：亚得里亚海北部海岸线沿岸残留沙丘生态系统中植物多样性格局的生态驱动力

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摘要

Coastal sand dunes represent one of the most fragile ecosystems in the Mediterranean basin. These habitats naturally suffer the action of several limiting factors such as sand burial, marine aerosol and low soil fertility; on the other hand, they often host species of high conservation value. Over the last decades, they have also experienced a high level of biological invasion. In this study, we sampled psammophilous vegetation in two sites in the northern Adriatic coast belonging to the Natura 2000 network to describe diversity patterns and to identify the main ecological drivers of species diversity. Plant species richness and their abundance were assessed in each plot. Differences in species composition for native and alien species were compared via PERMANOVA analysis. Species complementarity was explored by partitioning beta diversity in its spatial components (richness and replacement). A Generalized Linear Model was also computed to assess the main environmental factors that may promote invasiveness in these ecosystems. For the investigated area, our results highlight the strong differentiation in community composition both in alien and native species: in particular alien species showed on average a lower complementarity among habitats compared to native species. Specifically, communities seem to be more diversified when larger spatial scales were considered. Beta diversity in both groups appears to be more dominated by the richness component with respect to the replacement component. Furthermore, in these habitats, the occurrence of alien species was shown to be related to geomorphological predictors more than climatic variables.
机译：沿海沙丘代表了地中海盆地中最脆弱的生态系统之一。这些生境自然会受到诸如沙埋，海洋气溶胶和土壤肥力低等几个限制因素的影响；另一方面，它们经常寄养着具有高保护价值的物种。在过去的几十年中，他们还经历了高度的生物入侵。在这项研究中，我们在亚得里亚海北部海岸属于Natura 2000网络的两个地点采样了嗜湿性植被，以描述多样性模式并确定物种多样性的主要生态驱动力。在每个样地中评估植物物种的丰富度和丰度。通过PERMANOVA分析比较了本地和外来物种的物种组成差异。通过在空间多样性（丰富度和替代度）中划分β多样性来探索物种的互补性。还计算了广义线性模型，以评估可能促进这些生态系统中的入侵性的主要环境因素。对于被调查区域，我们的研究结果突出了外来物种和本地物种在群落组成上的强烈差异：特别是外来物种平均而言生境之间的互补性低于本地物种。具体而言，当考虑更大的空间规模时，社区似乎更加多样化。相对于替代成分，两组中的Beta多样性似乎主要由丰富度成分决定。此外，在这些生境中，外来物种的出现与地貌预测因素的关系比气候变量更重要。

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