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Army ants and obligaate ant-following birds : a study of ecology, spatial movement patterns and behavior in Amazonian Peru /Willson, Susan K., January 2003 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 185-199). Also available on the Internet.
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Effects of excessive nitrogen deposition on foliar nutrient dynamics, nutrient concentrations, and nutrient ratios in a Central Appalachian hardwood forestBurdette, Sarah Beth. January 2002 (has links)
Thesis (M.S.)--Marshall University, 2002. / Title from document title page. Document formatted into pages; contains x, 52 p. with maps and illustrations. Includes bibliographical references (p. 48-52).
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Patterns of mineral element retranslocation in four species of tropical montane forest trees in Monteverde, Costa RicaHollis, Steven Scott. January 2008 (has links) (PDF)
Thesis (M.E.S.)--The Evergreen State College, 2008. / Title from title screen (viewed 2/25/2010). Includes bibliographical references (p. 21-23).
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Songbird communities in burned and logged stands with variable tree retention in the Canadian Rocky Mountains /Stuart-Smith, A. Kari January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2002. / Typescript (photocopy). Includes bibliographical references (leaves 113-128). Also available on the World Wide Web.
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Investigations into the ecological relationships of ponderosa pine in southeast ArizonaDodge, Richard Archie, 1932- January 1963 (has links)
No description available.
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The Abert squirrel (Sciurus aberti aberti) and its relationship to the forests of ArizonaKeith, James Oliver, 1932- January 1956 (has links)
No description available.
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Kaibab squirrel activities in relation to forest characteristicsRatcliff, Thomas D., 1943- January 1974 (has links)
No description available.
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Nitrogen fixation by Ceanothus fendleri and Lupinus argenteus as a function of parent material and vegetal coverStory, Mark Thomas, 1949- January 1974 (has links)
No description available.
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FOREST STRUCTURE UNDER HUMAN INFLUENCE NEAR AN UPPER-ELEVATION VILLAGE IN NEPALBolton, Gary Howard January 2005 (has links)
Across the southern slope of the Nepal Himalaya lie large areas of upper-elevation broadleaf evergreen forest. Resources extracted by subsistence villagers include hand-cut tree-leaf fodder for livestock, fuelwood, and poles for construction of herders’ shelters. Indigenous use of forest products may be altering forest structure and resource availability in Nepal. This research examined forest structure and its relationships with human use of forest products near the upper-elevation village of Chimkhola in west-central Nepal. In the 150-ha forest study area, mean density and standard error (SE) of trees >10 cm dbh was 817 (30) stems ha⁻¹ and mean (SE) total basal area was 44 (3.2) m² ha⁻¹. Cluster analysis of density data for 32 tree species suggested three forest communities: a Symplocos-Quercus community, a Symplocos-mixed evergreen community, and a Rhododendron-Symplocos community. Ordination by principal components analysis of tree species densities indicated a relationship between community structure and a cutting index that increases with harvest intensity. Size-class distributions of important fodder-resource oak species suggested Quercus lamellosa is in decline, but Q. oxyodon and Q. semecarpifolia may be reproducing successfully. Age-diameter regression equations of three evergreen tree species showed growth rate of Symplocos ramosissima to be approximately twice that of Machilus duthei or that of Lindera pulcherrima. The fast growth rate and shade tolerance of S. ramosissima appear to confer a successional advantage. I assessed sustainability of harvest of pole-size (5-10 cm dbh) S. ramosissima used in herders’ shelters, by comparison of harvest and replenishment rates. Mean (SE) density of pole-size S. ramosissima was 375 (32) stems ha⁻¹ in the study area. If the total harvest was distributed evenly across the forest area, it would be 34 stems ha⁻¹ yr⁻¹ and would not exceed the replenishment rate. However, harvest was concentrated in the Symplocos-Quercus community, closest to the village and agricultural fields. Using stump counts as a proxy of relative harvest intensity, harvest rates were sustainable in the Symplocos-mixed evergreen and Rhododendron-Symplocos communities, but not sustainable in the Symplocos-Quercus community.
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The distribution and synopsis of ecological and silvical characteristics of tree species of British Columbia's forestsKlinka, Karel, Worrall, John, Skoda, L., Varga, Pal, Chourmouzis, Christine January 1999 (has links)
An updated silvics text for British Columbia. The need for an effective learning tool for silvics - one of the basic required courses in forestry - has been recognized by intructors as well as students across the province. The text prepared 18 years ago by Krajina et al. (1982) specifically for western Canada has become outdated. The silvics text by Burns and Honkala (1990) represents an up-to-date compendium but it is not an effective learning tool, particularly lacking in the linkage of silvics to ecological classification. Consequently, we revised and expanded “Distribution and Ecological Characteristics of Trees and Shrubs of British Columbia” (Krajina et al. 1982) using the available information on silvics, with some modification for BC and the results of recent silvics research done in BC. This material has been consolidated into a format that will help
students understand the silvical attributes of tree species as well as the relationships between trees and their environments. To enhance learning, we have selected a series of slides illustrating the salient characteristics for each species and present this visual
component on a CD-ROM included with the text. Also included is a large biogeoclimatic zone map of BC. The text, together with the CD-ROM, is intended to facilitate learning of silvics emphasizing its application to silviculture.
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