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首页> 外文期刊>Estuarine Coastal and Shelf Science >Distribution modeling of seagrasses in brackish waters of Grado-Marano lagoon (Northern Adriatic Sea)
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Distribution modeling of seagrasses in brackish waters of Grado-Marano lagoon (Northern Adriatic Sea)

机译：格拉多-马拉诺泻湖（北亚得里亚海）微咸水中海草的分布模型

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Seagrasses play an important role in coastal lagoons both as primary producers and ecosystem engineers, thus sustaining biodiversity and ecosystem services. In recent decades, their populations have shown a rapid decrease, mainly due to their vulnerability to environmental degradation. Their ecology was widely investigated in the marine domain whereas the knowledge of their distribution patterns in lagoon waters is still not exhaustive. This study aimed at improving the knowledge of seagrass ecology in such ecosystem. Three seagrass species (i.e. Zostera marina, Zostera noltii and Cymodocea nodosa) occurring in Grado-Marano lagoon (Northern Adriatic Sea-Italy) were studied by examining: (i) the distribution of each taxon, (ii) the main water, and (iii) geomorphological variables, gathered in 466 sample points during field surveys and from literature, respectively. Logistic-Generalized Linear Models (GLMs) were used to develop species distribution models (SDM) of seagrass meadows and single species. The seagrass presence was mainly explained by two clear ecological gradients: (i) sea-inner shoreline and (ii) channel-tidal flats. In particular, seagrasses thrive in areas mostly subjected to marine influence, in both terms of proximity to lagoon inlets and main channels, avoiding areas near major rivers mouths. Species distribution models highlighted the crucial role of water salinity and distance from fresh water sources (positively and negatively related, respectively). Zostera marina and Zostera noltii showed similar comparable effects for most of the ecological predictors, with the exception of water depth (ecological vicariance). Cymodocea nodosa showed a wider ecological variability, with lower goodness of model selection. (c) 2015 Elsevier Ltd. All rights reserved.
机译：海草作为主要生产者和生态系统工程师在沿海泻湖中发挥着重要作用，从而维持了生物多样性和生态系统服务。近几十年来，其人口迅速减少，这主要是由于他们易受环境退化的影响。在海洋领域对它们的生态进行了广泛研究，而对它们在泻湖水域中的分布模式的了解仍不全面。这项研究旨在提高此类生态系统中的海草生态学知识。研究了（i）各类群的分布，（ii）主要水和（3）在Grado-Marano泻湖（北亚得里亚海意大利）中出现的三种海草物种（即Zostera marina，Zostera noltii和Cymodocea nodosa）。 iii）地貌变量，在实地调查中分别从文献中收集了466个采样点。使用Logistic广义线性模型（GLM）来开发海草草甸和单个物种的物种分布模型（SDM）。海草的存在主要由两个明显的生态梯度来解释：（i）海内海岸线和（ii）河道-滩涂。尤其是，在靠近泻湖入口和主要水道方面，海草在大多数受到海洋影响的地区areas壮成长，避开了靠近主要河流河口的地区。物种分布模型强调了水盐度和与淡水源的距离（分别是正相关和负相关）的关键作用。除水深（生态变化）外，大多数生态预测因子的滨海带菌虾（Zostera marina）和带菌带菌（Zostera noltii）表现出相似的可比效果。结节藻显示出较大的生态变异性，模型选择的优势较低。 （c）2015 Elsevier Ltd.保留所有权利。

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