LONG-TERM CHANGES OF MACROINVERTEBRATE COMMUNITIES IN RELATION TO FLOW VARIATIONS - THE RIVER GLEN, LINCOLNSHIRE, ENGLAND

被引：14

作者：

BICKERTON, MA

机构：

[1] School of Geography, University of Birmingham, Birmingham

来源：

REGULATED RIVERS-RESEARCH & MANAGEMENT | 1995年 / 10卷 / 2-4期

关键词：

MACROINVERTEBRATE COMMUNITIES; SAMPLING RECORDS; FLOW VARIATIONS; FLOW PREFERENCE RELATIONSHIPS;

D O I：

10.1002/rrr.3450100204

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Taxa and community relationships with flow were investigated using National Rivers Authority macroinvertebrate sampling records from a total of 45 sites in the River Glen catchment and daily flow records, taken over the period 1976-1994. Four sites (two upstream and two downstream of an interbasin transfer outflow) were studied in detail. Community analyses of summer samples (41 records from 1977 to 1994) showed April mean flow and low flows in the same summer as sampling to be the best predictors of macroinvertebrate community type. Comparison of the frequency of individual taxa in summers when flows were above or below the flow sustained by the inter-basin transfer (0.107 m(3) s(-1)) showed a relatively high number of taxa, including Sailidae, Molannidae, Planorbis spp. and Haliplidae, to be more frequent in low-flow summers, whereas other taxa, including Rhyacophilidae and Leptophlebidae, were more frequent in high-flow summers, differences apparently related to position in the catchment and variability in the development of marginal macrophytes. The implications of altering flow regime on habitat and macroinvertebrate communities are discussed, and the suitability of National Rivers Authority biological records for developing long-term flow-preference relationships for individual taxa are considered.

引用

页码：81 / 92

页数：12

共 23 条

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