SPATIAL AND TEMPORAL ABUNDANCE PATTERNS OF WATERBIRDS IN THE SOUTHERN CAPE PROVINCE .2. WATERFOWL

被引：19

作者：

BOSHOFF, AF

PALMER, NG

PIPER, SE

机构：

[1] Nature and Environmental Conservation, Grahamstown, 6140

[2] Nature and Environmental Conservation, Stellenbosch, 7600

[3] Dept. of Psychology, University of Natal, Durban, King George V Ave

来源：

OSTRICH | 1991年 / 62卷 / 3-4期

关键词：

D O I：

10.1080/00306525.1991.9639656

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Waterfowl (ducks, geese, moorhens, gallinules, coot) were counted, and water-level and water transparency measured, on a monthly basis from 1980 to 1983 or 1984, at the six waterbodies comprising the Wilderness-Sedgefield Lakes Complex, southern Cape Province. The fluctuating status of the submerged aquatic macrophytes, and the trophic status of the waterbodies, was documented. The counts reflect the monthly status of the birds, and allow the calculation of densities (birds/ha). Linear and logarithmic models aided the interpretation of the count data. Spatial and temporal patterns and trends are described, and discussed in relation to changes in water-level, water transparency and aquatic macrophyte biomass regimes in the study area. Cyclical fluctuation in Potamogeton pectinatus biomass, and its effect on Red-knobbed Coot numbers, is emphasised. The monthly abundance peaks of some species occurred at water-bodies in a regular sequence each year.

引用

页码：178 / 196

页数：19

共 35 条

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