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崇明东滩藻类盐渍带大型底栖动物功能群的划分及其分布特征

林良羽,童春富**,李秀珍   

  1. (华东师范大学, 河口海岸学国家重点实验室, 上海 200062)
  • 出版日期:2015-08-10 发布日期:2015-08-10

Classification and distribution characteristics of benthic macroinvertebrate functional groups in the saline algae zone of Chongming Dongtan.

LIN Liang-yu, TONG Chun-fu**, LI Xiu-zhen   

  1. (State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China)
  • Online:2015-08-10 Published:2015-08-10

摘要: 在崇明东滩藻类盐渍带大型底栖动物取样调研的基础上,依据食性、生活型以及传统分类特征进行3种形式的功能群划分,并分析其组成与时空分布特征。调查期间,共采集到大型底栖动物19种,主要优势种(IRI>20)均属于双壳类。结果表明:功能群组成存在明显的时空变化特征;对同一功能群及相应的功能群整体而言,其空间分布较其时间分布差异更为显著;但不同划分方式功能群整体时空分布特征有所不同,其密度与物种数均以生活型功能群整体的时空分布差异最为显著,而食性功能群则最不明显;单个功能群的密度与物种数以生活型功能群中的底上型功能群的时空分布差异最为显著;不同划分方式功能群所反映的大型底栖动物群落相关信息存在差异,在具体研究中应考虑不同功能群划分方式的组合,以达到多层次反映系统信息的目的。

关键词: 非结构性碳, 呼吸驯化, 土壤增温, 细根呼吸

Abstract: Based on the surveys on benthic macroinvertebrates in the saline algae zone of Chongming Dongtan, three different types of functional group were classified according to feeding habits, life forms and traditional taxonomic characteristics. Then the compositions and spatialtemporal distribution characteristics of the functional groups were analyzed. Total 19 species were recorded during the surveys. The dominant species (IRI>20) were all from Bivalvia. The results proved that the compositions of the functional groups had obvious spatial and temporal variation characteristics. For a specific functional group and the corresponding total functional groups, the variations of spatial distribution appeared to be more significant than those of temporal distribution. The spatialtemporal distribution characteristics of the total functional groups varied with the classification types. The density and the number of species of the total lifeform functional groups showed the most significant spatialtemporal variations, while the total feedinghabit functional groups appeared to have the least. To the parameters of a specific functional group, the epifauna of the lifeform functional group proved to have the most significant spatialtemporal variation characteristics. It seems that the different functional group classifications focus on the different aspects of the benthic macroinvertebrate communities; further studies may be needed to combine them together to reflect the integral information of the system.

Key words: fine root respiration, soil warming, nonstructural carbohydrate, respiration acclimation.