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Author : William A. Andrews,McEwan, Sandra J
Publisher : Regina : Saskatchewan Education Resource Centre, 1992. (Fast Print)
Page : 128 pages
File Size : 55,5 Mb
Release : 1992
Category : Freshwater ecology
ISBN : OCLC:1032864740
Author : William A. Andrews,Sandra J. McEwan
Publisher : Scarborough, Ont. : Prentice-Hall
Page : 342 pages
File Size : 47,7 Mb
Release : 1987-01-01
Category : Freshwater ecology
ISBN : 013503129X
Author : National Research Council,Division on Earth and Life Studies,Commission on Geosciences, Environment and Resources,Committee on Restoration of Aquatic Ecosystems: Science, Technology, and Public Policy
Publisher : National Academies Press
Page : 580 pages
File Size : 43,5 Mb
Release : 1992-01-01
Category : Technology & Engineering
ISBN : 0309045347
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Author : National Research Council,Division on Earth and Life Studies,Water Science and Technology Board,Committee on Assessing and Valuing the Services of Aquatic and Related Terrestrial Ecosystems
Publisher : National Academies Press
Page : 291 pages
File Size : 48,6 Mb
Release : 2005-05-14
Category : Science
ISBN : 9780309093187
Nutrient recycling, habitat for plants and animals, flood control, and water supply are among the many beneficial services provided by aquatic ecosystems. In making decisions about human activities, such as draining a wetland for a housing development, it is essential to consider both the value of the development and the value of the ecosystem services that could be lost. Despite a growing recognition of the importance of ecosystem services, their value is often overlooked in environmental decision-making. This report identifies methods for assigning economic value to ecosystem servicesâ€"even intangible onesâ€"and calls for greater collaboration between ecologists and economists in such efforts.
Author : P. Sam Lake
Publisher : John Wiley & Sons
Page : 458 pages
File Size : 47,6 Mb
Release : 2011-06-09
Category : Science
ISBN : 9781444341799
Droughts are a major hazard to both natural and human-dominated environments and those, especially of long duration and high intensity, can be highly damaging and leave long-lasting effects. This book describes the climatic conditions that give rise to droughts, and their various forms and chief attributes. Past droughts are described including those that had severe impacts on human societies. As a disturbance, droughts can be thought of as “ramps” in that they usually build slowly and take time to become evident. As precipitation is reduced, flows from catchments into aquatic systems decline. As water declines in water bodies, ecological processes are changed and the biota can be drastically reduced, though species and populations may survive by using refuges. Recovery from drought varies in both rates and in degrees of completeness and may be a function of both refuge availability and connectivity. For the first time, this book reviews the available rather scattered literature on the impacts of drought on the flora, fauna and ecological processes of aquatic ecosystems ranging from small ponds to lakes and from streams to estuaries. The effects of drought on the biota of standing waters and flowing waters and of temporary waters and perennial systems are described and compared. In addition, the ways in which human activity can exacerbate droughts are outlined. In many parts of the world especially in the mid latitudes, global warming may result in increases in the duration and intensity of droughts. Drought and Aquatic Ecosystems is essential reading for freshwater ecologists, water resource managers and advanced students.
Author : Stuart Findlay,Robert L. Sinsabaugh
Publisher : Academic Press
Page : 534 pages
File Size : 52,7 Mb
Release : 2003
Category : Nature
ISBN : 9780122563713
Overviews of the source, supply and variability of DOM, surveys of the processes that mediate inputs to microbial food webs, and syntheses consolidating research findings provide a comprehensive review of what is known of DOM in freshwater. This book will be important to anyone interested in understanding the fundamental factors associated with DOM that control aquatic ecosystems."--BOOK JACKET.
Author : Alan G. Hildrew,David G. Raffaelli,Ronni Edmonds-Brown
Publisher : Cambridge University Press
Page : 335 pages
File Size : 45,7 Mb
Release : 2007-07-12
Category : Nature
ISBN : 9781139464178
Ecologists have long struggled to predict features of ecological systems, such as the numbers and diversity of organisms. The wide range of body sizes in ecological communities, from tiny microbes to large animals and plants, is emerging as the key to prediction. Based on the relationship between body size and features such as biological rates, the physics of water and the amount of habitat available, we may be able to understand patterns of abundance and diversity, biogeography, interactions in food webs and the impact of fishing, adding up to a potential 'periodic table' for ecology. Remarkable progress on the unravelling, describing and modelling of aquatic food webs, revealing the fundamental role of body size, makes a book emphasising marine and freshwater ecosystems particularly apt. In this 2007 book, the importance of body size is examined at a range of scales that will be of interest to professional ecologists, from students to senior researchers.
Author : National Research Council,Division on Earth and Life Studies,Commission on Geosciences, Environment and Resources,Committee on Restoration of Aquatic Ecosystems: Science, Technology, and Public Policy
Publisher : National Academies Press
Page : 575 pages
File Size : 40,6 Mb
Release : 1992-02-01
Category : Technology & Engineering
ISBN : 9780309092883
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Author : Jim Williams
Publisher : Unknown
Page : 214 pages
File Size : 53,5 Mb
Release : 2019-06-06
Category : Electronic
ISBN : 164116137X
The study of aquatic ecosystems and the organisms that inhabit them are studied in the two fields of aquatic ecology and biology. An aquatic ecosystem is a combination of various biotic communities and abiotic factors. Abiotic factors include parameters of water depth, nutrient level, salinity, temperature, etc. Maintenance of normal values of these variables is essential for the continued sustainability of the diverse flora and fauna of such ecosystems. Aquatic ecosystems are primarily grouped into marine and freshwater ecosystems, along with lentic, pond, lotic and wetlands forming other smaller classes. Aquatic ecosystems are crucial for the efficient recycling of nutrients, purification of water, ground water replenishment and in the provision of habitats to aquatic life. This book provides significant information on these disciplines to help develop a good understanding of aquatic biology and ecology and their related fields. It also includes some of the vital pieces of work being conducted across the world. This book is a vital tool for all researching or studying aquatic sciences as it gives incredible insights into the emerging trends and concepts
Author : Giacomo De Carolis,Francesca de Santi
Publisher : Mdpi AG
Page : 292 pages
File Size : 40,8 Mb
Release : 2021-11-22
Category : Science
ISBN : 3036516662
The book highlights recent research efforts in the monitoring of aquatic districts with remote sensing observations and proximal sensing technology integrated with laboratory measurements. Optical satellite imagery gathered at spatial resolutions down to few meters has been used for quantitative estimations of harmful algal bloom extent and Chla mapping, as well as winds and currents from SAR acquisitions. The knowledge and understanding gained from this book can be used for the sustainable management of bodies of water across our planet.
Author : Gerald L. Mackie,Gerry L. Mackie
Publisher : Kendall Hunt
Page : 788 pages
File Size : 41,9 Mb
Release : 2004
Category : Education
ISBN : 0757508839
W. Merritt, Professo
Author : H. Lieth,R.H. Whittaker
Publisher : Springer Science & Business Media
Page : 339 pages
File Size : 50,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642809132
The period since World War II, and especially the last decade influenced by the International Biological Program, has seen enormous growth in research on the function of ecosystems. The same period has seen an exponential' rise in environmental problems including the capacity of the Earth to support man's population. The concern extends to man's effects on the "biosphere"-the film of living organisms on the Earth's surface that supports man. The common theme of ecologic research and environmental concerns is primary production the binding of sunlight energy into organic matter by plants that supports all life. Many results from the IBP remain to be synthesized, but enough data are available from that program and other research to develop a convincing sum mary of the primary production of the biosphere-the purpose of this book. The book had its origin in the parallel interests of the two editors and Gene E. Likens, which led them to prepare a symposium on the topic at the Second Biological Congress of the American Institute of Biological Sciences in Miami, Florida, October 24, 1971. Revisions of the papers presented at that symposium appear as Chapters 2, 8, 9, 10, and 15 in this book. We have added other chapters that complement this core; these include discussion and evaluation of methods for measuring productivity and regional production, current findings on tropical productivity, and models of primary productivity.
Author : Patrick J. Neale,Oliver Zielinski,Rebecca L. North,Maren Striebel,Jochen Wollschläger
Publisher : Frontiers Media SA
Page : 157 pages
File Size : 45,5 Mb
Release : 2021-07-08
Category : Science
ISBN : 9782889669806
Author : Wayne S. Davis,Thomas P. Simon
Publisher : CRC Press
Page : 434 pages
File Size : 41,6 Mb
Release : 1995-03-03
Category : Technology & Engineering
ISBN : 0873718941
Biological Assessment and Criteria presents a state-of-the-art overview of the applications of biological assessments and biocriteria for water quality management in fresh waters. The book presents case studies which illustrate how bioassessment has been used to identify and diagnose water quality problems. It also provides examples of the use of qualitative and quantitative biocriteria as regulatory tools to complement water quality criteria and standards. The first book to present the technical foundation, rationale, program and policy relevance, and legal basis for the most accurate tools used to assess freshwater natural resource and regulatory efforts, this book provides useful and timely information for water quality managers.
Author : Thomas S. Bianchi,Elizabeth A. Canuel
Publisher : Princeton University Press
Page : 417 pages
File Size : 49,6 Mb
Release : 2011-02-28
Category : Science
ISBN : 9781400839100
This textbook provides a unique and thorough look at the application of chemical biomarkers to aquatic ecosystems. Defining a chemical biomarker as a compound that can be linked to particular sources of organic matter identified in the sediment record, the book indicates that the application of these biomarkers for an understanding of aquatic ecosystems consists of a biogeochemical approach that has been quite successful but underused. This book offers a wide-ranging guide to the broad diversity of these chemical biomarkers, is the first to be structured around the compounds themselves, and examines them in a connected and comprehensive way. This timely book is appropriate for advanced undergraduate and graduate students seeking training in this area; researchers in biochemistry, organic geochemistry, and biogeochemistry; researchers working on aspects of organic cycling in aquatic ecosystems; and paleoceanographers, petroleum geologists, and ecologists. Provides a guide to the broad diversity of chemical biomarkers in aquatic environments The first textbook to be structured around the compounds themselves Describes the structure, biochemical synthesis, analysis, and reactivity of each class of biomarkers Offers a selection of relevant applications to aquatic systems, including lakes, rivers, estuaries, oceans, and paleoenvironments Demonstrates the utility of using organic molecules as tracers of processes occurring in aquatic ecosystems, both modern and ancient