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首页> 外文期刊>Marine ecology >Spatio-temporal variability of benthic macroalgae in a coral reef system highly influenced by fluvial discharge: Veracruz, Gulf of Mexico
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Spatio-temporal variability of benthic macroalgae in a coral reef system highly influenced by fluvial discharge: Veracruz, Gulf of Mexico

机译：Benthic Macroalgae在珊瑚礁系统中受到氟氏排放的影响：Veracruz，墨西哥湾的珊瑚礁系统

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The Veracruz Reef System, in the southern Gulf of Mexico, is a suitable area for the study of the temporal and spatial variability of macroalgae abundance, at reef settings influenced by the fluvial discharge of the Jamapa River, and by human activities in the city and port of Veracruz. With this purpose, the bottom cover of each morpho-functional group of benthic macroalgae (frondoses, turf, and crustose corallines), and hermatypic corals, was determined at ten selected coral reefs, on a seasonal basis (rainy and dry seasons), for the 2009-2015 period. The average cover of benthic macroalgae was high (53.1%), with turf as the dominant morpho-functional group (31.9%), as in several reef ecosystems in the tropical Atlantic, followed by crustose corallines (15.2%), and frondoses (6.1%). Although turf macroalgae is dominant, due to their high temporal and spatial variability, the Veracruz Reef System could not be considered to be in a stable state, but just in an intermediate unstable equilibrium state, which is highly influenced by a high sediment load. As expected, nearshore reefs presented higher macroalgae covers, and unexpectedly, the outer-shelf reefs presented the highest cover of frondoses. Despite fluvial discharge influence, no differences in cover were found between the rainy and dry seasons. There was a negative and significantly correlation between the cover of frondoses and turf, which suggests that the driver/s of the abundance of these macroalgae, act in opposite ways for each group. Three clusters of reefs, defined by community structure and conservation degree, were determined: nearshore or degraded, offshore or moderately conserved, and conserved; and the entire Veracruz Reef System is considered to be in a moderately state of conservation.
机译：在墨西哥南部的Veracruz Reef系统是研究Macroalgae丰富的时间和空间变异性的合适区域，在受Jamapa River河流渠道的河流放电以及城市的人类活动和Veracruz港口。为此目的，在十个选定的珊瑚礁（季节性珊瑚礁（雨季和干燥的季节），确定每种Morpho-uncroalgae（Frondose，Turostose珊瑚珊瑚珊瑚）的每个Morpho-unightoral群（Frondose，Turikose珊瑚珊瑚）和癫痫珊瑚冠的底盖。 2009 - 2015年期间。底栖凝聚物的平均覆盖率高（53.1％），用草皮为显性的官能团（31.9％），如热带大西洋的几个礁生态系统中，其次是甲状腺珊瑚（15.2％）和漂浮物（6.1 ％）。虽然TuRF Macroalgae是显性的，因此由于它们的高度和空间变异性，但Veracruz Reef系统不能被认为是稳定的状态，而是仅在中间不稳定的平衡状态下，这是由高沉积物负荷的高度影响。正如预期的那样，近岸珊瑚礁呈现出更高的宏观盖，而且出乎意料地呈现，外部搁板礁呈现出冰淇淋的最高封面。尽管氟化液体放电影响，但雨季和干燥季节之间没有发现覆盖物的差异。脆弱和草皮覆盖之间存在负面且显着的相关性，这表明这些大草原的丰富驾驶员，以每组的相反方式行事。确定了由社区结构和保护程度定义的三个珊瑚礁群：近岸或退化，海上或中度保守，保守;并且整个Veracruz Reef系统被认为是处于中等的保护状态。

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