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Author : Anonim
Publisher : Unknown
Page : 340 pages
File Size : 40,7 Mb
Release : 1996
Category : Ecological assessment (Biology)
ISBN : MINN:31951D03001085S
Author : Celedonio Aguirre Bravo
Publisher : Unknown
Page : 340 pages
File Size : 47,5 Mb
Release : 1996
Category : Biotic communities
ISBN : UVA:X004080037
Author : Celedonio Aguirre Bravo
Publisher : Unknown
Page : 305 pages
File Size : 49,6 Mb
Release : 1996
Category : Electronic
ISBN : LCCN:96215220
Author : Anonim
Publisher : Unknown
Page : 348 pages
File Size : 46,9 Mb
Release : 1996
Category : Biotic communities
ISBN : UOM:39015053960434
Author : G. Bruce Wiersma
Publisher : CRC Press
Page : 792 pages
File Size : 41,7 Mb
Release : 2004-04-27
Category : Nature
ISBN : 9780203495476
The current rate and scale of environmental change around the world makes the detection and understanding of these changes increasingly urgent. Subsequently, government legislation is focusing on measurable results of environmental programs, requiring researchers to employ effective and efficient methods for acquiring high-quality data. Envi
Author : Anonim
Publisher : Unknown
Page : 550 pages
File Size : 54,9 Mb
Release : 1999
Category : Forest ecology
ISBN : MINN:31951D029964319
Author : Anonim
Publisher : Unknown
Page : 310 pages
File Size : 47,6 Mb
Release : 1985
Category : Forests and forestry
ISBN : CUB:U183029135238
Author : Shabeg S. Sandhu,Laura Jackson,Kay Austin,Jeffrey Hyland,Brian D. Melzian,Kevin Summers
Publisher : Springer Science & Business Media
Page : 593 pages
File Size : 51,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401149761
The Environmental Monitoring and Assessment Program was created by EPA to develop the capability for tracking the changing conditions of our natural resources and to give environmental policy the advantages ofa sound scientific understanding of trends. Former EPA Administrators recognized early that contemporary monitoring programs could not even quantify simple unknowns like the number of lakes suffering from acid rain, let along determine if national control policies were benefiting these lakes. Today, adding to acidification impacts are truly complex problems such as determining the effects of climate change, of increases in ultraviolet light, toxic chemicals, eutrophication and critical habitat loss. Also today, the Government Performance and Results Act seeks to have agencies develop performance standards based on results rather than simply on levels of programmatic activities. The charge to EMAP of ecosystems is, therefore, the same today as it was a with respect to measuring the condition decade ago. We welcome the increasing urgency for sound scientific monitoring methods and data by efforts to protect and improve the environment. Systematic nationwide monitoring of natural resources is more than anyone program can accomplish, however. In an era of declining budgets, it is crucial that monitoring programs at all levels of government coordinate and share environmental data. EMAP resources are dwarfed by the more than $500 million spent on federal monitoring activities each year.
Author : Anonim
Publisher : Unknown
Page : 412 pages
File Size : 40,7 Mb
Release : 2004
Category : Agricultural conservation
ISBN : PSU:000055799058
Author : Anonim
Publisher : Unknown
Page : 472 pages
File Size : 55,7 Mb
Release : 2000
Category : Conservation of natural resources
ISBN : MINN:31951D029964343
Author : Victor A. Rudis
Publisher : Unknown
Page : 136 pages
File Size : 50,7 Mb
Release : 2003
Category : Electronic books
ISBN : UOM:39015061855659
Author : Anonim
Publisher : Unknown
Page : 548 pages
File Size : 53,7 Mb
Release : 1998
Category : Forests and forestry
ISBN : CORNELL:31924086579137
Author : Walter G. Whitford,Benjamin D. Duval
Publisher : Academic Press
Page : 473 pages
File Size : 52,7 Mb
Release : 2019-08-20
Category : Science
ISBN : 9780081026557
Nearly one-third of the land area on our planet is classified as arid or desert. Therefore, an understanding of the dynamics of such arid ecosystems is essential to managing those systems in a way that sustains human populations. This second edition of Ecology of Desert Systems provides a clear, extensive guide to the complex interactions involved in these areas. This book details the relationships between abiotic and biotic environments of desert ecosystems, demonstrating to readers how these interactions drive ecological processes. These include plant growth and animal reproductive success, the spatial and temporal distribution of vegetation and animals, and the influence of invasive species and anthropogenic climate change specific to arid systems. Drawing on the extensive experience of its expert authors, Ecology of Desert Systems is an essential guide to arid ecosystems for students looking for an overview of the field, researchers keen to learn how their work fits in to the overall picture, and those involved with environmental management of desert areas. Highlights the complexity of global desert systems in a clear, concise way Reviews the most current issues facing researchers in the field, including the spread of invasive species due to globalized trade, the impact of industrial mining, and climate change Updated and extended to include information on invasive species management, industrial mining impacts, and the current and future role of climate change in desert systems
Author : Caryl L. Elzinga,Angela G. Evenden
Publisher : DIANE Publishing
Page : 190 pages
File Size : 45,5 Mb
Release : 1998-05
Category : Electronic
ISBN : 0788148370
This annotated bibliography documents literature addressing the design and implementation of vegetation monitoring. It provides resources managers, ecologists, and scientists access to the great volume of literature addressing many aspects of vegetation monitoring: planning and objective setting, choosing vegetation attributes to measure, sampling design, sampling methods, statistical and graphical analysis, and communication of results. Over half of the 1400 references have been annotated. Keywords pertaining to the type of monitoring or method are included with each bibliographic entry. Keyword index.
Author : Claudia M. Regan
Publisher : Unknown
Page : 546 pages
File Size : 41,9 Mb
Release : 1998
Category : Biotic communities
ISBN : STANFORD:36105113733864
Vegetation at the Glacier Lakes Ecosystem Experiment Site, a 600 ha research site at 3200 to 3500 m elevation in the Snowy Range of southeastern Wyoming, was categorized and described from an intensive sampling of species abundances. A total of 304 vascular plant taxa were identified through collection and herbarium documentation. Plots with tree species were separated from those without tree species for ordination and classification analyses. Detrended correspondence analysis was used to order plots along major axes of composition variation, which are inferred moisture and topographic gradients. Cluster analysis was used to categorize plots based on composition similarity. The resulting groups were named according to species dominants. We identified and described in detail 4 meadow, 4 thicket or scrub, 3 krummholz, and 2 forest plant associations.