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Reef benthic composition and coral communities at the Wuzhizhou Island in the south China sea: The impacts of anthropogenic disturbance
Estuarine, Coastal and Shelf Science ( IF 2.6 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.ecss.2020.106863
Jianzhong Huang , Fengxia Wang , Hongwei Zhao , Huili Xu , Sheng Liu , Qiang Xu , Aimin Wang , Xiubao Li

The responses of reef benthic substrata and coral communities to anthropogenic disturbances at the Wuzhizhou Island (WZZ, off the southeast coast of the Hainan Island in the South China Sea) were examined in 2007–2017. A total of 90 scleractinia coral species were recorded at WZZ in 2017. Cluster analysis and ANOSIM analysis of reef benthic composition suggested that WZZ can be divided into the north and south zones with significantly different characteristics. Indeed, anthropogenic disturbance (i.e., tourism activity and land use) has been intense in the north zone, whereas the south zone has not been as much disturbed. Coral reefs in the north zone suffered from stronger turbidity and nutrient enrichment. Compared with the south zone, the north zone had significantly lower coverage of stony coral (e.g. Acropora, Montipora and Pocillopora) and soft coral, juvenile coral density but significantly higher coverage of rock/rubble, sand, hydrocoral and sponge. Redundancy analysis demonstrated that turbidity and dissolved nutrients (dissolved inorganic nitrogen or NH4+) were the significant factors in explaining the spatial distribution of reef benthic substrata and coral communities in 2017. The remarked decline of live coral cover in the north zone of WZZ during 2007–2016 can be associated with intensive construction, land use change, and tourism development. These results suggested that anthropogenic disturbances may have degenerated environmental conditions and affected the coral reefs at WZZ.



中文翻译:

南海the支洲岛礁底栖生物组成和珊瑚群落:人为干扰的影响

在2007年至2017年期间,研究了zhi支洲岛(WZZ,南海海南岛东南沿海外)的礁底栖生物和珊瑚群落对人为干扰的响应。2017年在WZZ上共记录了90种巩膜藻珊瑚物种。通过聚类分析和ANOSIM分析珊瑚底栖生物组成,WZZ可以分为特征明显不同的北部和南部区域。确实,在北部地区,人为干扰(旅游活动和土地利用)已经很强烈,而南部地区则没有那么严重。北部地区的珊瑚礁浊度更高,养分含量更高。与南部地区相比,北部地区的石质珊瑚覆盖率明显较低(例如AcroporaMontiporaPocillopora)和软珊瑚,未成年珊瑚的密度,但岩石/瓦砾,沙子,水力珊瑚和海绵的覆盖率明显更高。冗余度分析表明,浊度和溶解的养分(溶解的无机氮或NH 4 +)是解释2017年底栖底栖生物和珊瑚群落空间分布的重要因素。WZZ北部地区活珊瑚覆盖率显着下降。 2007–2016年可能与集约化建设,土地用途变化和旅游业发展有关。这些结果表明,人为干扰可能已经退化了环境条件,并影响了WZZ的珊瑚礁。

更新日期:2020-07-13
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