A Directory of Research Natural Areas on Federal Lands of the United States of America PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Directory of Research Natural Areas on Federal Lands of the United States of America PDF full book. Access full book title A Directory of Research Natural Areas on Federal Lands of the United States of America by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category : Research natural areas
Languages : en
Pages : 132
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forest conservation
Languages : en
Pages : 22
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Research natural areas
Languages : en
Pages : 132
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forest protection
Languages : en
Pages : 92
Get Book Here
Book Description
Author: C. T. Dyrness
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 16
Get Book Here
Book Description
Author: United States. Federal Committee on Research Natural Areas
Publisher:
ISBN:
Category : Natural areas
Languages : en
Pages : 140
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Indian Creek Region (Or.)
Languages : en
Pages : 15
Get Book Here
Book Description
Author: Sarah Greene
Publisher:
ISBN:
Category : Natural areas
Languages : en
Pages : 124
Get Book Here
Book Description
Author: Todd Keeler-Wolf
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 186
Get Book Here
Book Description
This report summarizes each of 68 ecological surveys conducted from 1975 through 1988 on candidate and established Research Natural Areas in the Pacific Southwest Region of the USDA Forest Service. These surveys represent an important but largely unknown contribution to the ecological literature of California. For each summary, information on location, target elements, distinctive features, physical characteristics, association types, plant diversity, and conflicting impacts is provided. Comparisons are made between similar vegetation types at different sites. Tables and appendices summarize the plant communities, target elements, rare plants, and trees occurring on all areas. Maps of all areas and photographs of most areas are included.
Author: Steven K. Rust
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 136
Get Book Here
Book Description
A representativeness assessment of National Forest System (N FS) Research Natural Areas in ldaho summarizes information on the status of the natural area network and priorities for identification of new Research Natural Areas. Natural distribution and abundance of plant associations is compared to the representation of plant associations within natural areas. Natural distribution and abundance is estimated using modeled potential natural vegetation, published classification and inventory data, and Heritage plant community element occurrence data. Minimum criteria are applied to select only viable, high quality plant association occurrences. In assigning natural area selection priorities, decision rules are applied to encompass consideration of the adequacy and viability of representation. Selected for analysis were 1,024 plant association occurrences within 214 natural areas (including 115 NFS Research Natural Areas). Of the 1,566 combinations of association within ecological sections, 28 percent require additional data for further analysis; 8, 40, and 12 percent, respectively, are ranked from high to low conservation priority; 13 percent are fully represented. Patterns in natural area needs vary between ecological section. The result provides an operational prioritization of Research Natural Area needs at landscape and subregional scales. Objective ranking criteria provide clear accounting of priority assignments that are easily updated to reflect changing information or conditions.
Author: C. T. Dyrness
Publisher:
ISBN:
Category : Land use
Languages : en
Pages : 244
Get Book Here
Book Description
Research Natural Areas are examples of typical and distinctive natural ecosystems and habitats reserved for scientific and educational use. This outline of the minimal Research Natural Area system needed to provide adequate field laboratories for ecological, environmental, and land management research was developed by an interinstitutional, interdisciplinary working group. Natural area needs were first described on the basis of individual organisms, habitats, or ecosystems which should be represented. These "cells," the basic building blocks in defining the total scope of the system, considered terrestrial and aquatic environments as well as rare and endangered species. Identified cells were matched against existing Research Natural Areas to determine which were already filled. The remaining, unfilled cells were then tentatively grouped as units which were listed as Research Natural Area needs. A minimal Research Natural Area system for Oregon and Washington requires approximately 360 tracts which, in turn, incorporate over 770 individual cells (ecosystems, habitats, or organisms). Since 60 Research Natural Areas are already established, about 300 additional areas are needed. These remaining needs were assigned a priority (low, medium, or high) based on importance and degree to which they are endangered, as well as identified as to the Federal, State, or private agency or institution most likely to be able to provide a tract of that type. The purpose of Research Natural Areas, their place in land planning, history of Research Natural Area activities in the Pacific Northwest, and general observations and recommendations on unresolved problems are also outlined.
