Author: Royal Society of South AfricaPublisher:
ISBN:
Category : Natural history
Languages : en
Pages : 910
Book Description
Transactions of the Royal Society of South Africa
Author: Royal Society of South AfricaPublisher:
ISBN:
Category : Natural history
Languages : en
Pages : 910
Book Description
Management and Ecology of Freshwater Plants
Author: Joseph CaffreyPublisher: Springer Science & Business Media
ISBN: 9401157820
Category : Science
Languages : en
Pages : 338
Book Description
There is a growing need for appropriate management of aquatic plants in rivers and canals, lakes and reservoirs, and drainage channels and urban waterways. This management must be based on a sound knowledge of the ecology of freshwater plants, their distribution and the different forms of control available including chemical, physical, biological and biomanipulation. This series of papers from over 20 different countries was generated from the highly successful European Weed Research Society symposia on aquatic plant management, this being the ninth. The contributions provide a valuable insight into the complexities involved in managing aquatic systems, discuss state-of-the-art control techniques such as biomanipulation using fish and waterfowl and the use of straw, and deal with patterns of regrowth and recovery post-management. Careful consideration is given to the use of chemicals, a practice which has come under scrutiny in recent years. Underpinning the development of such control techniques is a growing body of knowledge relating to the biology and ecology of water plants, including growth responses under different trophic conditions, the impact of pollution, and aspects of photosynthesis. The authorship of the papers represents the collective wisdom of leading scientists and experts from fisheries agencies, river authorities, nature conservation agencies, the agrochemical industry and both governmental and non-governmental organisations.
Biogeography and Ecology of Southern Africa
Author: Marinus J.A. WergerPublisher: Springer Science & Business Media
ISBN: 9400999518
Category : Science
Languages : en
Pages : 1402
Book Description
Southern Africa is certainly not a naturally bounded area so that there are several possibilities for delineating it and concepts about its extent. Wellington* discussed the various possibilities for delineation and suggested that one line stands out more clearly and definitely as a physical boundary than any other, namely the South Equatorial Divide, the watershed between the ZaIre, Cuanza and Rufiji Rivers on the one hand and the Z ambezi, Cunene and Rovuma Rivers on the other. This South Equatorial Divide is indeed a major line of separation for some organisms and is also applicable in a certain geographical sense, though it does not possess the slightest significance for many other groups of organisms, ecosystems or geographical and physical features of Africa. The placing of the northern boundary of southern Africa differs in fact strongly per scientific dis cipline and is also influenced by practical considerations regarding the possibilities of scientific work as subordinate to certain political realities and historically grown traditions. This is illustrated, for example, in such works as the Flora of Southern Africa, where the northern boundary of the area is conceived as the northern and eastern political boundaries of South West Africa, South Africa and Swaziland. Botswana, traditionally included in the area covered by the Flora Zambesiaca, thus forms a large wedge in 'Southern Africa'.
Memoir
Author: Ladies in the Laboratory III
Author: Mary R. S. CreesePublisher: Scarecrow Press
ISBN: 0810872897
Category : Science
Languages : en
Pages : 260
Book Description
Published in 1998, Ladies in the Laboratory provided a systematic survey and comparison of the work of 19th-century American and British women in scientific research. A companion volume, published in 2004, focused on women scientists from Western Europe. In this third volume, author Mary R.S. Creese expands her scope to include the contributions of 19th- and early 20th-century women of South Africa, Australia, New Zealand, and Canada. The women whose lives and work are discussed here range from natural history collectors and scientific illustrators of the early and mid years of the 19th century to the first generation of graduates of the new colonial colleges and universities. Rarely acknowledged in publications of the British and European specialists, the contributions of these women nonetheless formed a significant part of the natural history information about extensive, previously unknown regions and their products. Rather than a biographical dictionary or a collection of self-contained essays on individuals from many time periods, Ladies in the Laboratory III is a connected narrative tied into the wider framework of 19th-century science and education. A well-organized blend of individual life stories and quantitative information, this volume is for everyone interested in the story of women's participation in 19th century science. The stories of these women make for fascinating reading and serve as a valuable source for the student of women's and colonial history.
Biogeography and Ecology of Southern Africa
Author: M. J. A. WergerPublisher:
ISBN:
Category : Biogeography
Languages : en
Pages : 800
Book Description
Monographiae Biologicae
Author: Jacques van MieghemPublisher:
ISBN:
Category : Biogeography
Languages : en
Pages : 832
Book Description
Collected Papers
Author: Freshwater Biological AssociationPublisher:
ISBN:
Category : Freshwater biology
Languages : en
Pages : 830
Book Description
Catalog of the Farlow Reference Library of Cryptogamic Botany, Harvard University: Author catalog
Author: Farlow Reference Library and HerbariumPublisher:
ISBN:
Category : Botany
Languages : en
Pages : 638
Book Description
The Science Reports of National Tsing Hua University
Author: Qing hua da xue (Beijing, China)Publisher:
ISBN:
Category : Biology
Languages : en
Pages :
Book Description