The Diatoms of the Sundays and Great Fish Rivers in the Eastern Cape Province of South Africa PDF Download

Author: R. E. M. Archibald
Publisher:
ISBN:
Category : Algae
Languages : en
Pages : 440

View

Book Description

Author: E. F. Stoermer
Publisher: Cambridge University Press
ISBN: 9780521004121
Category : Science
Languages : en
Pages : 488

View

Book Description
Timely synopsis of applications in environment and industry using ubiquitous microscopic algae.

Author:
Publisher: Academy of Natural Sciences
ISBN: 9781437955446
Category :
Languages : en
Pages : 244

View

Book Description

Author:
Publisher: Academy of Natural Sciences
ISBN: 9781437955439
Category :
Languages : en
Pages : 356

View

Book Description

Author: Herman van Dam
Publisher: Springer Science & Business Media
ISBN: 9401736227
Category : Science
Languages : en
Pages : 530

View

Book Description
The Twelfth International Diatom Symposium stressed how diatoms can be used to assess the human impact on natural waters, without neglecting other important fields of research. As the frustules of many diatom species are relatively resistant to dissolution they are preserved in freshwater and marine sediments and provide a record of past environments on earth. In past decades they have been successfully used to reconstruct changes in water bodies evoked by changes in salinity, acidification and eutrophication. In the last few years diatom-inferred predictions of environmental variables have become much more quantitative. In the most recent research reports the strong separation between palaeolimnological and neolimnological diatom research is fading, as palaeolimnologists are increasingly using modern calibration sets to infer past states of the environment. This quantitative approach is also very suitable for prediction of future changes in the biota of surface waters. Also ecological changes due to climatic modification have been investigated more thoroughly recently. A very important new research topic is the occurrence of toxic diatoms, particularly along the coasts of North America. These proceedings are intended to be a balanced view of such modern developments in diatom research. They should also be of interest to non-specialists in diatoms, who can use the results of diatom research as a tool in a more general taxonomic, ecological and geological context.

Author: B.R. Allanson
Publisher: Springer Science & Business Media
ISBN: 9400923821
Category : Science
Languages : en
Pages : 461

View

Book Description
Limnology - the study of inland waters - had its genesis in Europe about the turn of the century. The studies of Fore1 on Lake Geneva were of seminal value at this time. It prospered under the early guidance of Thienemann, Naumann and Wesenberg-Lund in Europe and, soon transplanted, of Birge and Juday in North America (to name just a few early spirits). Now, liminology is a respectable scientific discipline taught at many universities, and limnologists are recognized as important contributors to our understanding of how this fragile spaceship functions. All this acknowledged, it must also be acknowledged that limnology is not yet a globally comprehensive science. To be sure, much is known about globally applicable processes, and the structural elements of aquatic ecosystems worldwide, but limnological emphases, interests and concerns remain essentially European and North American in balance. Much is known about lakes and rivers in less than one fifth of the world's land area (northern temperature regions); rather little is known about inland waters elsewhere.

Author: R.S. Ambasht
Publisher: Springer Science & Business Media
ISBN: 1461502217
Category : Science
Languages : en
Pages : 389

View

Book Description
Organisms and environment have evolved through modifying each other over millions of years. Humans appeared very late in this evolutionary time scale. With their superior brain attributes, humans emerged as the most dominating influence on the earth. Over the millennia, from simple hunter-food gatherers, humans developed the art of agriculture, domestication of animals, identification of medicinal plants, devising hunting and fishing techniques, house building, and making clothes. All these have been for better adjustment, growth, and survival in otherwise harsh and hostile surroundings and climate cycles of winter and summer, and dry and wet seasons. So humankind started experimenting and acting on ecological lines much before the art of reading, writing, or arithmetic had developed. Application of ecological knowledge led to development of agriculture, animal husbandry, medicines, fisheries, and so on. Modem ecology is a relatively young science and, unfortunately, there are so few books on applied ecology. The purpose of ecology is to discover the principles that govern relationships among plants, animals, microbes, and their total living and nonliving environmental components. Ecology, however, had remained mainly rooted in botany and zoology. It did not permeate hard sciences, engineering, or industrial technologies leading to widespread environmental degradation, pollution, and frequent episodes leading to mass deaths and diseases.

Author: J.-P. Descy
Publisher: Springer Science & Business Media
ISBN: 9401726701
Category : Science
Languages : en
Pages : 214

View

Book Description
The ecology of potamoplankton has received less attention than lake plankton. These proceedings produce a synthesis of the composition, community structure and dynamics of lotic phytoplankton, which are intuitively submitted to a strong physical control in the flowing environment, perceived as much more `disturbed' than a lake, even than a well-mixed shallow one. It turns out that the boundary between the phytoplankton of rivers and lakes is not as clear-cut as was thought. In particular, most contributions provide arguments emphasizing the prominent role of physical control in both aquatic systems, especially due to the steep light gradient resulting from turbulent mixing in a turbid water column. Similarities and differences between potamoplankton and limnoplankton, largely based on the information gathered by the contributors are discussed in the introductory paper by Reynolds et al.

Author: Karl Esser
Publisher: Springer Science & Business Media
ISBN: 3642716687
Category : Science
Languages : en
Pages : 457

View

Book Description

Author: Academy of Natural Sciences of Philadelphia
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 308

View

Book Description
"Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794.