Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Repeatability of Riparian Vegetation Sampling Methods written by and published by . This book was released on 2004 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted to evaluate variability among observers for riparian vegetation data collection methods and data reduction techniques. The methods are used as part of a largescale monitoring program designed to detect changes in riparian resource conditions on Federal lands. Methods were evaluated using agreement matrices, the Bray-Curtis dissimilarity metric, the coefficient of variation, the percentage of total variability attributed to observers, and estimates of the number of sites needed to detect change. Community type (CT) cover data differed substantially among the six to seven observers that sampled the same sites. The mean within-site similarity in the vegetation data ranged from 40 to 65 percent. Converting CT data to ratings (bank stability, successional, and wetlands ratings) resulted in better repeatability, with coefficients of variation ranging from 6 to 13 percent and a percentage of variability attributed to observers of 16 to 44 percent. Sample size estimates for the ratings generated from CT cover data ranged from 56 to 224 sites to detect a change of 10 percent between two populations. The woody species regeneration method was imprecise. The effective ground cover method was quite precise with a coefficient of variation of two, but had so little variability among sites that statistically significant change in this attribute would not be expected. In general, reducing the CTs to ratings increased precision because of the elimination of differences among observers that were not important from the perspective of the rating. Studies that seek to detect change at a single site would need to take into account the observer variability described here. Studies that seek to detect differences between populations of sites could detect relatively large changes with these methods and ratings. Small differences among populations would be difficult to detect with a high degree of confidence, unless hundreds of sites were sampled.

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2003 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Forestry Chronicle written by and published by . This book was released on 1995 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1975 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Advances in Ecological Environmental Sciences written by and published by . This book was released on 1993 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Avian Foraging written by Pacific Seabird Group. International Symposium and published by . This book was released on 1990 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1992-08 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1973 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Condor written by and published by . This book was released on 2000 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wildland Fire in Ecosystems written by and published by . This book was released on 2000 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology Abstracts written by and published by . This book was released on 1999 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1992 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Agricultural Index written by and published by . This book was released on 1991 with total page 2570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insects and Wildlife written by Dr John Capinera and published by John Wiley & Sons. This book was released on 2011-09-13 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects and Wildlife: Arthropods and their Relationships with Wild Vertebrate Animals provides a comprehensive overview of the interrelationships of insects and wildlife. It serves as an introduction to insects and other arthropods for wildlife management and other vertebrate biology students, and emphasizes the importance of insects to wild vertebrate animals. The book emphasizes how insects exert important influences on wildlife habitat suitability and wildlife population sustainability, including their direct and indirect effects on wildlife health. Among the important topics covered are: the importance of insects as food items for vertebrate animals; the role of arthropods as determinants of ecosystem health and productivity; the ability of arthropods to transmit disease-causing agents; an overview of representative disease-causing agents transmitted by arthropods; arthropods as pests and parasites of vertebrates; the hazards to wildlife associated with using using pesticides to protect against insect damage; insect management using techniques other than pesticides; the importance of insect conservation and how insects influence wildlife conservation.