3 edition of The biology of Barberspan, with special reference to the avifauna found in the catalog.
Bibliography: p. 73-74.
|Statement||South African Ornithological Society]|
|Publishers||South African Ornithological Society]|
|The Physical Object|
|Pagination||xvi, 137 p. :|
|Number of Pages||41|
|3||The Ostrich : Supplement ;|
nodata File Size: 9MB.
Aproximaciones a La Psicoterapia/ Approximations to Psychotherapy (Paidos Psicologia, Psiquiatria, Psicoterapia / Paidos Psychology, Psychiatry, Psychotherapy)
The Open Diplachne Pan is characterised by a Diplachne fusca— Eragrostis bicolor community with a Diplachne fusca subcommunity and an Eragrostis bicolor— Diplachne fusca subcommunity associated with it.
Cynodon transvaalensis is the dominant species in this pan. Our results showed that southern African waterfowl breed in the wet season and moult during the dry season.
A comparison of the vegetation of two pans with special reference to the avifauna inside Soetdoring Nature Reserve, a freshwater and a brackish pan, is presented. Forty-four coastal wetlands and 49 sections of coastline were visited. Flight-feather regrowth is an energetically costly stage in the annual cycle of waterfowls. The freshwater pan was classified as a Mixed Grass Pan and the brackish pan as an Open Diplachne Pan. Northern hemisphere species moult where chances of predation are low, when temperatures are warm, and before food and aquatic habitats approach their winter minima.
or its licensors or contributors. In contrast, northern hemisphere waterfowl breed and moult during the warm season. Tadorna cana was an exception, breeding in the dry season and moulting during the wet season in the summer-rainfall area.
There was also a long lag period between peak breeding and peak moult in southern hemisphere waterfowl species, the longest lag being that of birds in the summer-rainfall area. This information is important since very few published analyses are available for pans in the Free State Province, as well as in South Africa as a whole. No species can be considered to be endangered in the south-western Cape but a decrease in available wader habitat has occurred.
South Africa has a responsibility to protect Palaearctic waders already protected on their Northern Hemisphere breeding grounds. They breed during peaks in the availability of both food and breeding sites. The most abundant Palaearctic species was the curlew sandpiper Caalidris ferruginea Pontoppidan and the most abundant resident species was the white-fronted plover Charadrius marginatus Vieillot.
By continuing you agree to the. A TWINSPAN classification, refined by Braun-Blanquet procedures, revealed five distinct plant communities for the pan basins and freshwater areas inside the basin collectively. In this study, we tested the hypothesis that moult will coincide with the time of year when food and aquatic habitats are most abundant. We then incorporated published data to compare and contrast the relative timing of breeding and moult in southern hemisphere southern African and Australian waterfowl with northern hemisphere European and North American species.
Northern hemisphere species moult where chances of predation are low, when temperatures are warm, and before food and aquatic habitats approach their winter minima.