SPATIAL AND TEMPORAL ABUNDANCE PATTERNS OF WATERBIRDS IN THE SOUTHERN CAPE PROVINCE .1. DIVING AND SURFACE PREDATORS

被引：13

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：

10.1080/00306525.1991.9639655

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Diving and surface feeding waterbirds (grebes, cormorants, gulls, terns, kingfishers) 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 were considered to be reasonably accurate, allowing the calculation of densities (birds/ha). Spatial and temporal patterns and trends are described and discussed; linear and logarithmic models aided the interpretation of the data. Some species exhibited significant correlations with water-level and/or water transparency, and some exhibited abundance peaks at the waterbodies in a regular monthly sequence. Possible reasons for these phenomena are discussed.

引用

页码：156 / 177

页数：22

共 66 条

[1]

Allanson B.R., Whitfield A.K., The limnology of the Touw River floodplain. 5, Afr. Nat. Sci. Prog, 79, pp. 1-35, (1983)

[2]

Banks D.J., Use of Habitat by Waterbirds within a Fluctuating Habitat, (1980)

[3]

Barker J., The Effect of Catchment Land Use on Sediment Input to Swartvlei, (1985)

[4]

Batchelor G.R., Population structure and apparent prédation on the red-breasted kurper, Tilapia rendalh, in a northern Transvaal impoundment, S. Afr. J. Wildl. Res, 8, pp. 39-41, (1978)

[5]

Bell-Cross G., Observations on fish-eating birds in central Africa, Honeyguide, 77, pp. 23-21, (1974)

[6]

Berruti A., The biomass, energy consumption and breeding of waterbirds at Lake St Lucia, Ostrich, 54, pp. 65-82, (1983)

[7]

Birt V.L., Birt T.P., Goulet D., Cairns D.K., Montevecchi W.A., Ashmole’s halo: Direct evidence for prey depletion by a seabird, Mar. Ecol. Progr. Ser, 40, pp. 205-208, (1987)

[8]

Blaker D., Winterbottom J.M., Bird counts at Strandfontein sewage works and Rietvlei, Cape Town, Ostrich, 39, pp. 94-104, (1968)

[9]

Boshoff A.F., A checklist of the birds of the southern Cape Province, Bontebok, 7, pp. 40-47, (1991)

[10]

Boshoff A.F., Palmer N.G., Aspects of the biology and ecology of the Osprey in the Cape Province, Ostrich, 54, pp. 189-204, (1983)

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