April 14, 2021

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Tropical Stream Ecology

Tropical Stream Ecology
Author : David Dudgeon
Publisher : Elsevier
Release Date : 2011-05-04
Category : Science
Total pages :370
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Tropical Stream Ecology describes the main features of tropical streams and their ecology. It covers the major physico-chemical features, important processes such as primary production and organic-matter transformation, as well as the main groups of consumers: invertebrates, fishes and other vertebrates. Information on concepts and paradigms developed in north-temperate latitudes and how they do not match the reality of ecosystems further south is expertly addressed. The pressing matter of conservation of tropical streams and their biodiversity is included in almost every chapter, with a final chapter providing a synthesis on conservation issues. For the first time, Tropical Stream Ecology places an important emphasis on viewing research carried out in contributions from international literature. First synthetic account of the ecology of all types of tropical streams Covers all of the major tropical regions Detailed consideration of possible fundamental differences between tropical and temperate stream ecosystems Threats faced by tropical stream ecosystems and possible conservation actions Descriptions and synstheses life-histories and breeding patterns of major aquatic consumers (fishes, invertebrates)

Stream Ecology

Stream Ecology
Author : J. David Allan,María M. Castillo
Publisher : Springer Science & Business Media
Release Date : 2007-08-17
Category : Science
Total pages :436
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A hugely important text for advanced undergraduates as well as graduates with an interest in stream and river ecology, this second, updated edition is designed to serve as a textbook as well as a working reference for specialists in stream ecology and related fields. The book presents vital new findings on human impacts, and new work in pollution control, flow management, restoration and conservation planning that point to practical solutions. All told, the book is expanded in length by some twenty-five percent, and includes hundreds of figures, most of them new.

Methods in Stream Ecology

Methods in Stream Ecology
Author : F. Richard Hauer,Gary A. Lamberti
Publisher : Academic Press
Release Date : 2011-04-27
Category : Science
Total pages :896
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Methods in Stream Ecology, Second Edition, provides a complete series of field and laboratory protocols in stream ecology that are ideal for teaching or conducting research. This updated edition reflects recent advances in the technology associated with ecological assessment of streams, including remote sensing. In addition, the relationship between stream flow and alluviation has been added, and a new chapter on riparian zones is also included. The book features exercises in each chapter; detailed instructions, illustrations, formulae, and data sheets for in-field research for students; and taxanomic keys to common stream invertebrates and algae. With a student-friendly price, this book is key for all students and researchers in stream and freshwater ecology, freshwater biology, marine ecology, and river ecology. This text is also supportive as a supplementary text for courses in watershed ecology/science, hydrology, fluvial geomorphology, and landscape ecology. Exercises in each chapter Detailed instructions, illustrations, formulae, and data sheets for in-field research for students Taxanomic keys to common stream invertebrates and algae Link from Chapter 22: FISH COMMUNITY COMPOSITION to an interactive program for assessing and modeling fish numbers

Patterns and Processes in Stream Ecology

Patterns and Processes in Stream Ecology
Author : David Dudgeon
Publisher : Balogh Scientific Books
Release Date : 1992
Category : Freshwater biology
Total pages :147
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Tropical Rain-forest

Tropical Rain-forest
Author : A. C. Chadwick,Stephen L. Sutton
Publisher : Longwood PressLtd
Release Date : 1984
Category : Science
Total pages :335
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Tropical Ecology

Tropical Ecology
Author : Anonim
Publisher : Unknown
Release Date : 2003
Category : Botany
Total pages :129
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Proceedings

Proceedings
Author : International Association of Theoretical and Applied Limnology
Publisher : Unknown
Release Date : 2008
Category : Freshwater biology
Total pages :129
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Perspectives in Tropical Limnology

Perspectives in Tropical Limnology
Author : F. Schiemer,K. T. Boland
Publisher : Balogh Scientific Books
Release Date : 1996
Category : Limnology
Total pages :347
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Ecology

Ecology
Author : Anonim
Publisher : Unknown
Release Date : 1998
Category : Ecology
Total pages :129
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The Importance of Fishes in Nutrient Cycling in Tropical Freshwaters

The Importance of Fishes in Nutrient Cycling in Tropical Freshwaters
Author : Peter Biek McIntyre
Publisher : Unknown
Release Date : 2006
Category :
Total pages :308
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Fishes are a prominent component of animal communities in tropical freshwaters due to their high species richness, great abundance, and large size. Their contributions to the functioning of tropical freshwater ecosystems are poorly understood, but are increasingly threatened by human activities. I studied the functional importance of fishes in Lake Tanganyika, Africa, and Rio Las Marias, Venezuela. In Lake Tanganyika, I tested the interactions between top-down control by grazing fishes and bottom-up control by nutrients. Grazing fish strongly suppressed algal biomass and enhanced biomass-specific primary productivity, regardless of nutrient manipulations. Fish also influence nutrient availability indirectly by recycling dietary nitrogen (N) and phosphorus (P). I quantified nutrient excretion rates by 14 species in Lake Tanganyika and 49 species in Rio Las Marias. In each ecosystem, there was striking variation in N and especially P recycling, yielding>10-fold variation in excreted N:P ratios. Using data from extensive fish surveys, I estimated that aggregate nutrient recycling by fishes varies 8-fold among sites in Lake Tanganyika and>14-fold in Rio Las Marias. These results indicate that fish distributions in each ecosystem are sufficiently heterogeneous to engender hotspots of nutrient recycling where local nutrient availability is enhanced and dissolved N:P ratios are altered. Comparing aggregate excretion estimates to ambient nutrient concentrations and ecosystem nutrient demand indicates that recycling by fishes probably plays a critical role in supporting primary productivity in both ecosystems. To assess the potential loss of nutrient recycling resulting from erosion of fish diversity, I simulated a suite of potential extinction scenarios. A small subset of species dominated aggregate recycling, and contributions of individual species differed between N and P. The consequences of simulated extinctions varied widely among scenarios, and compensatory responses by surviving species could moderate reductions in aggregate excretion. Fisheries data from each ecosystem indicate that the species targeted by fishermen were among the most important contributors to recycling. Thus, overfishing could yield rapid declines in nutrient regeneration. Taken together, these results indicate that fishes species vary widely in their functional characteristics, and that anthropogenic alteration of tropical fish communities may have unseen feedbacks on ecosystem processes and services.

Directory of environmental life scientists - north central r

Directory of environmental life scientists - north central r
Author : Anonim
Publisher : Unknown
Release Date : 2021
Category :
Total pages :129
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River Ecology and Man

River Ecology and Man
Author : International Symposium on River Ecology and the Impact of Man,International Symposium on River Ecology and the Impact of Man. University of Massachusetts, 1971
Publisher : Unknown
Release Date : 1972
Category : Science
Total pages :465
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Revista de biología tropical

Revista de biología tropical
Author : Anonim
Publisher : Unknown
Release Date : 2014
Category : Biology
Total pages :129
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River Ecology and Management

River Ecology and Management
Author : Robert J. Naiman,Robert E. Bilby
Publisher : Springer Verlag
Release Date : 1998
Category : Science
Total pages :705
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Touching all parts of the natural environment and nearly all aspects of human culture, streams and rivers act as centres of organization within landscapes. They provide natural resources such as fish and clean water, transportation, energy, diffusion of wastes, and recreation. Today, with unprecedented demands on streams and rivers by an exponentially increasing human population, a basic ecological understanding of the structure and dynamics of running waters is essential for formulating sound management and policy decisions. The vast Pacific coastal ecoregion of the United States contains an extraordinary array of physical settings and examples of the range of dynamics associated with rivers and their management. The interface between the science and policy of natural resource management is illustrated by examples from this ecoregion, including the protection of riparian forest, the marbled murrelet, salmon, and amphibians.

Canadian Journal of Fisheries and Aquatic Sciences

Canadian Journal of Fisheries and Aquatic Sciences
Author : Anonim
Publisher : Unknown
Release Date : 2006
Category : Aquatic sciences
Total pages :129
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