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首页> 外文期刊>Marine _Freshwater Research >Temporal trends in benthic macrofauna composition in response to seasonal variation in a tropical coastal lagoon, Celestun, Gulf of Mexico
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Temporal trends in benthic macrofauna composition in response to seasonal variation in a tropical coastal lagoon, Celestun, Gulf of Mexico

机译：墨西哥湾塞莱斯顿热带沿海泻湖底栖大型动物组成的时间趋势对季节性变化的响应

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摘要

Aquatic habitats in some tropical coastal environments can change seasonally, causing changes in the community structure of the benthic macrofauna. A tropical coastal lagoon, the Celestun lagoon, on the north-west Yucatan peninsula, was sampled seasonally and faunal, water and sediment data were compared with conditions during the 1994–1995 weather cycle across a grid of 12 sites distributed along the lagoon’s salinity gradient. Habitat variation was expressed as physical factors associated with the water column (e.g. salinity) and bottom sediments (e.g. interstitial salinity, texture), whereas the benthic community response was assessed through changes in species composition, diversity and dominance. Taxonomic dominance varied according to changes in seasonal habitat characteristics. During the season of strong northerly winds (‘nortes’), molluscs dominated and polychaetes almost disappeared. Polychaetes then recovered during the dry season, becoming as common as crustaceans and molluscs. Finally, during the rainy season, polychaetes became the dominant group and molluscs declined. A conceptual model summarising the community structure changes associated with key physical and biotic factors is proposed. The results indicate that the benthic community of the Celestun lagoon is a resilient one, largely driven by natural weather variability in this tropical ecosystem to a greater extent than previously suggested.
机译：在某些热带沿海环境中，水生生境可能会季节性变化，从而导致底栖大型动物群落结构发生变化。季节性采样了位于尤卡坦半岛西北部的一个热带沿海泻湖塞勒斯顿泻湖，并将其动物，水和沉积物数据与1994-1995年天气周期中沿泻湖盐度梯度分布的12个点的网格进行了比较。 。生境变化被表示为与水柱（例如盐度）和底部沉积物（例如间质盐度，质地）相关的物理因素，而底栖动物群落的反应是通过物种组成，多样性和优势度的变化来评估的。分类学优势根据季节性生境特征的变化而变化。在强北风季节，软体动物占主导地位，多毛cha几乎消失了。然后在干燥的季节里，多毛cha得以恢复，变得与甲壳类和软体动物一样普遍。最终，在雨季，多毛羚成为主要种群，软体动物减少。提出了一个概念模型，总结了与关键的物理和生物因素有关的群落结构变化。结果表明，塞勒斯顿泻湖的底栖生物群落是一个有弹性的群落，很大程度上受到该热带生态系统中自然天气变化的驱动，其程度比以前建议的更大。

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