摘要
壶穴是水流与河床相互作用的产物，既是河床微地貌的组成部分，又是河流生态系统中特殊生境之一。本文对重庆五布河壶穴形态特征和壶穴内部底栖动物进行调查，统计分析山地河流壶穴形态特征、底栖动物群落结构及壶穴面积与底栖动物丰厦的关系。结果表明：壶穴长短轴比介于1．0—1．2的比例最高，壶穴口径大多分布于10～20cm，壶穴长轴和短轴、口径和深度存在较强的（对数）正相关关系；壶穴中共采集底栖动物34种，优势类群为四节蜉科、划蝽科、细蜉科；底栖动物功能摄食类群之间存在显著性差异，收集者数量最多，而撕食者最少。壶穴面积与底栖无脊椎动物丰度存在显著的正相关关系。
Pothole is a product of the interaction between river flow and riverbed. It is a compo- nent of micro-topography of riverbed and also is a special habitat in the river ecosystem. In this study, the shape characteristics of potholes and the benthic invertebrates in the potholes were in- vestigated in Wubu River, Chongqing. The standard statistical methodologies were used to quanti- tatively describe the features of the pothole shape, the community structure of benthic inverte- brates and the relationship between pothole area and the species richness of benthic invertebrate community in the potholes of mountain rivers. The results indicated that the proportion of the pot- holes with 1.0-1.2 long-to-short axis ratio was the highest, and the potholes＇ diameters were mostly distributed within 10-20 cm. The long axis and short axis, diameter and depth of the pot- holes were strongly （log） positively correlated. A total of 34 species of benthic invertebrates were collected from the potholes, and the dominant species belonged to Baetidae, Corixidae, and Cae- nidae. There were significant differences in functional feeding groups. The collector-gatherers and the shredders were most and least abundant functional feeding groups, respectively. In addition, there was a significant positive relationship between pothole area and species richness of benthic invertebrate community in the potholes.
出处
《生态学杂志》
CAS
CSCD
北大核心
2015年第12期3402-3408,共7页
Chinese Journal of Ecology
基金
国家自然科学基金项目(51179214)资助
关键词
壶穴
形态
底栖动物
五布河
pothole
shape
benthic invertebrate
Wubu River.
