Spatial and temporal variation of community composition and species cover following dune restoration in the Devesa de Albufera (Valencia, Spain).

Plant populations were reintroduced to the coastal dune bar of the Devesa de Albufera from 1988 to 2004; different coastline sections received different species composition and cover. With the aim to detect spatial and temporal variation of floristic diversity, we compared current species composition and cover across the length of the Devesa and across the dune bar with those imposed at the time of restoration. Non-metric multidimensional scaling (NMDS) detected significant differences both across the dune faces and across the coast sections. Differences across the dune faces reflect the sea-inland ecological gradient and resulted from a spatial rearrangement of plant populations: Calystegia soldanella, Achillea maritima and Polygonum maritimum prefer the windward face; Malcolmia littorea and Lagurus ovatus the leeward. Differences across coast sections are related to those at restoration time, with a slow trend towards the homogenization of plant communities. At the current level of anthropic pressure, the plant cover is likely to evolve following the trends pointed out in this research.

1988年至2004年，研究人员将植物种群重新引种至德韦萨-阿尔武费拉（Devesa de Albufera）的沿海沙丘堤；不同海岸线区段的物种组成与覆盖度存在差异。为揭示植物区系多样性的时空变化规律，本研究将当前德韦萨全域及沙丘堤沿线的物种组成、覆盖度，与修复初期设定的基准状态进行了对比。非度量多维标度法（Non-metric Multidimensional Scaling, NMDS）分析显示，沙丘坡面与沿海区段均存在显著差异。沙丘坡面的差异反映了海-陆生态梯度，其成因在于植物种群的空间重构：肾叶打碗花（Calystegia soldanella）、滨海蓍（Achillea maritima）及滨海蓼（Polygonum maritimum）偏好迎风坡面；而滨海涩荠（Malcolmia littorea）与兔尾草（Lagurus ovatus）则更适生于背风坡面。沿海区段的群落差异与修复初期的状态相关，植物群落正呈现缓慢的均质化趋势。在当前的人为干扰强度下，植物覆盖度的变化或将遵循本研究揭示的规律。