[已撤稿] 三亚珊瑚礁珊瑚藻种类及其空间特征与环境因子的关系

珊瑚藻是珊瑚礁生态系统中重要的功能性群体。2010年通过水肺潜水分析了三亚珊瑚礁区的珊瑚藻种类组成和丰度, 以及群落空间特征与环境因子的关系。共鉴定出3科10属25种珊瑚藻, 其中珊瑚藻科占优势地位。三亚珊瑚礁区的珊瑚藻优势种分别为叉节藻Amphiroa ephedraea、拟中叶藻Mesophyllum simulans、串胞新角石藻Neogoniolithon fosliei、中叶藻M. mesomorphum、圆锥呼叶藻Pneophyllum conicum、孔石藻Porolithon onkodes和布氏水石藻Hydrolithon boergesenii。基于多元统计的分析结果, 将调查采样站位分为近岸型和离岸型2个主要集群, 其中近岸型的珊瑚藻种类以浊度、沉积速率(0~63μm)和悬浮物耐受种类为主, 离岸型则以光依赖-沉积物敏感种类为主。以珊瑚藻种类组成和丰度为基础的群落相似性分析结果表明, 其空间变异处于显著性水平。生物与非生物变量的相关分析结果表明, 最佳两变量组合(浊度和盐度)显著影响三亚珊瑚礁区2种类型调查站位中的珊瑚藻集合。在同一个研究站位, 因受干扰程度不同, 深水处的珊瑚藻的覆盖率比浅水处高。分析结果表明, 在三亚独特的珊瑚礁区中, 自然或人为的物理干扰因素都对调节珊瑚藻群落结构非常重要。

[RETRACTED] Species composition of coralline algae and its spatial characteristics related to environmental factors in Sanya coral reefs,China

Coralline algae are important functional group in the coral reef ecosystem. This study was carried out by a series of line transects run underwater with SCUBA apparatus from the reef flat to a depth of 9 m in each of the 11 research stations within the Sanya Coral Reefs in 2010. Among the inshore sites and the offshore sites of Sanya reefs, species composition and abundance of coralline algae were examined in relation to environmental factors. A total of 25 species belonging to three families and 10 genuses were identified, with the family Corallinaceae dominated in the study area. The eight dominant species were Amphiroa ephedraea, Mesophyllum simulans, Neogoniolithon fosliei, M. mesomorphum, Pneophyllum conicum, Porolithon onkodes, and Hydrolithon boergesenii. The sampling stations were divided into inshore type and offshore type based on the results of multivariate statistical analysis. The coralline algae species at the inshore sites were mainly turbidity, deposition rate (0~63 μm) and suspended solids (SS) tolerance species, while the species at the offshore sites were mainly light-dependent and sediment sensitive species. The results of community similarity analysis based on species composition and abundance of coralline algae showed the significant spatial variability. The correlation analysis between biotic and abiotic variables indicated that the best 2-variable combination (turbidity and salinity) showed a significant effect on the pattern of coralline algae assemblages between the two types of research sites in Sanya reefs. The living cover of coralline algae showed that deeper water is higher than that in shallow water due to the different degree of disturbance at the same study sites. This result suggests that physical disturbance, either natural or man-made, is a more important factor in regulating the coralline algae community structure within the coral reef distinct zone of Sanya.