Macroalgal assemblage changes on coral reefs along a natural gradient from fish farms in southern Hainan Island

Macroalgal assemblage changes on coral reefs along a natural gradient from fish farms in southern Hainan Island
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海南岛南部养鱼场沿自然梯度的珊瑚礁巨藻组合变化

DOI:
10.1080/14634988.2016.1140952
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发表时间:
2016-01
期刊:
Aquat. Ecosyst. Health Manag
影响因子:
--
通讯作者:
Huang H.
Huang H.
中科院分区:
其他
文献类型:
--
作者:
Li X.B.;Titlyanov E.A.;Zhang J.;Titlyanova T.V.;Zhang G.S.;Huang H.

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珊瑚礁上的退化过程与大型藻类组合的变化有关。本研究于2014年4月对海南岛南部3个样带的污染梯度珊瑚礁上的大型植物区系进行了研究。共采集底栖大型藻类73种,其中红色占58%,棕色占23%,绿色占19%。随着距离养鱼场出口的距离增加,大型藻类物种丰富度从40种显著增加到71种。而大型藻类的生物量从1.5 8kgm−2下降到1.1kgm−2。绿藻、褐藻、多囊马尾藻和三亚红藻的褐花从中度污染向重度污染转变为石笋和总状藻的绿花。这项研究支持的结果是,严重的污染不仅会导致大型藻类物种丰富度的显著下降和大型藻类组合的变化,而且还会导致绿色水华的发生。这项研究有望提供更准确的案例,将营养物质污染与珊瑚礁底栖生物的变化联系起来。
Degradation processes on coral reefs are associated with changes in macroalgal assemblages. In this study, a floristic study of the macrophyte species on coral reefs along a pollution gradient at 3 transects in southern Hainan Island, China, was conducted in April 2014. A total of 73 benthic macroalgal taxa were collected, of which 58% were reds, 23% browns and 19% greens. Along with the distance away from the outlet of fish farms, macroalgal species richness increased significantly from 40 species to 71 species. However, macroalgal biomass decreased from 1.58 kg m−2 to 1.1 kg m−2. Brown blooms of Chnoospora implexa, Padina australis, Sargassum polycystum and S. sanyaense changed to green blooms of Ulva lactuca and Caulerpa racemosa from moderately polluted sites to severely polluted sites close to the outlet. This study supports the results that severe pollution can lead not only to a significant decline of macroalgal species richness and changes in macroalgal assemblages, but also to the occurrence of green blooms. This study will hopefully provide more accurate cases to link nutrient pollution to changes in benthic organisms on coral reefs.
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