基于GAM模型的鱼类群落多样性分布及影响因素  

Fish community diversity distribution and its affecting factors based on GAM model.

作　　者：赵静[1] 章守宇[1] 汪振华[1] 林军[1] 周曦杰[1] 蒋日进[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306

出　　处：《生态学杂志》2013年第12期3226-3235,共10页Chinese Journal of Ecology

基　　金：国家"973"前期课题项目(2011CB111608);国家自然科学基金项目(41176110);国家海洋公益性项目(201005013);浙江省自然科学基金项目(LY13D060006)资助

摘　　要：为了探究鱼类群落的分布特征及与环境因子的相互关系,利用目前较为流行的广义加性模型(GAM)来分析鱼类群落与环境的关系,并进行鱼类群落多样性分布预测。结果表明:建立的模型运行良好,丰富度指数模型与多样性指数模型的解释率分别为68.9%和64.6%,预测值与观测值的相关系数平均值均为0.53;鱼类群落多样性分布主要受生境类型、季节、水温等因素影响,丰富度指数与多样性指数所受影响因子略有差异,影响丰富度分布的主要因子为生境、月份、温度、叶绿素和溶氧,影响多样性指数分布的主要因素为生境、叶绿素和溶氧;在研究海域,丰富度、多样性指数呈现中心海域高于周边海域的现象,泥沙石及岛屿岩礁生境附近的预测值较高。To approach the interrelationships between fish community distribution characteristics and environmental factors, the widely used generalized additive model （GAM） was applied to an- alyze the relationships between the fish community and environment in an archipelago of East China, and to predict the distribution of the fish community. The model performed well. The richness index and diversity index of the model explained 68.9% and 64.6% of variance, re- spectively, and the correlation coefficient between the predicted and measured values was 0.53. The distribution of the fish community diversity was mainly affected by habitat type, season, wa- ter temperature, and water chlorophyll and oxygen concentrations. There existed slight differ- ences in the factors affecting richness index and diversity index. The main factors affecting the richness index were habitat type, month, water temperature, and water chlorophyll and oxygen concentrations, while the main factors affecting the diversity index were habitat type and water chlorophyll and oxygen concentrations. [n the study area, the richness and diversity indices were higher in the central area than in its surrounding areas, and were higher in the sand/mud habitat and rocky habitat.

关 键 词：鱼类群落 广义相加模型 群落多样性分布 影响因素 

分 类 号：S931.1[农业科学—渔业资源]