• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 74
  • 13
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 104
  • 104
  • 54
  • 45
  • 45
  • 29
  • 19
  • 17
  • 16
  • 14
  • 14
  • 12
  • 11
  • 11
  • 11
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A habitat assessment to locate tree of heaven [Ailanthus altissima, (Mill.) Swingle] in Mammoth Cave National Park

Esham, Belinda D. January 2009 (has links) (PDF)
Thesis (Ph. D.)--University of Tennessee, Knoxville, 2009. / Title from title page screen (viewed on Nov. 12, 2009). Thesis advisor: Scott E. Schlarbaum. Vita. Includes bibliographical references.
2

The ecology of naturalised silvergrass (Vulpia) populations in south-western Australia

Loo, Christopher. January 2005 (has links)
Thesis (Ph. D.)--University of Western Australia, 2005. / Title from PDF title page (viewed on Nov. 9, 2006). Includes bibliographical references (p. 143-151).
3

Influence of canopy cover and landscape structure on proportion of alien and shade-intolerant plant species in forest sites /

Charbonneau, Neil C. January 1900 (has links)
Thesis (M. Sc.)--Carleton University, 2003. / Includes bibliographical references (p. 28-34). Also available in electronic format on the Internet.
4

Evaluating and monitoring invasive plant processes

Repath, Charles Fitts. January 2005 (has links) (PDF)
Thesis (M.S.)--Montana State University--Bozeman, 2005. / Typescript. Chairperson, Graduate Committee: Bruce D. Maxwell. Includes bibliographical references (leaves 114-130).
5

Monitoring the re-growth rate of alien vegetation after fire on Agulhas Plain, South Africa /

Fatoki, Oluwakemi Busayo. January 2007 (has links)
Thesis (MSc)-- University of Stellenbosch, 2007. / Masters of Science (Geographic Information Systems - Environmental Geography) Bibliography. Also available via the Internet.
6

The effects of native plants on non-native plant abundance in a restoration setting : differences among native species and the predictive ability of species traits

Goodridge, Jennifer M. 05 September 2001 (has links)
Reducing the cover of non-native species is one of the challenges of ecosystem restoration. The goal of this study is to identify native species traits that will increase native species cover and reduce non-native species cover in the first growing season at upland and wetland prairie restoration sites. Native and non-native prairie species were planted in the fall and harvested the following summer at both an upland and a wetland site. Native species traits, such as plant weight, leaf area, relative growth rate, leaf area ratio, leaf weight ratio, net assimilation rate, and specific leaf area were measured under laboratory conditions for 7- and 21-day old seedlings. Germination rate (laboratory) and phenology (field) were also measured. At the upland site, species with a large 7-day plant weight and a high germination rate also had high native cover in the field (P<0.00l, R��=0.83). At the wetland site, high 21-day leaf area, low 21-day leaf weight ratio, and high net assimilation rate predicted increased native cover in the field (P<0.00l, R��=0.87). An abundance of natives, as measured by native cover, native biomass, and number of individuals, likely results in fewer resources (light, nutrients, and water) available for the non-native species growth resulting in a reduction in the non-native cover. Intrinsic traits of native species also predicted the field performance of non-native species, although the amount of variation explained was lower than the amount of variation explained in the models that predicted native cover. In the upland site, native species with high leaf weight ratio (21-day) tended to have lower non-native cover in their field plots (P=0.087, R��=0.23). In the wetland site, the native species traits that predict non-native cover were low 21-day leaf area and high 21-day leaf weight ratio (P<0.00l, R��=0.46). These traits were similar to those that predicted native species cover at the wetland site. This study demonstrates the ability of species traits to predict field performance. Predictive models were generated using native species traits to select species for restoration that will increase native cover and decrease non-native cover in the first growing season. Traits can be measured for species not included in this study and the models generated can be used to predict the field performance of species at similar sites. / Graduation date: 2002
7

Interactive influences of wildfire and nonnative species on plant community succession in Hawaii Volcanoes National Park /

Ainsworth, Alison. January 2007 (has links)
Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references. Also available on the World Wide Web.
8

Insect populations on early successional native and alien plants

Ballard, Meg. January 2006 (has links)
Thesis (M.S.)--University of Delaware, 2006. / Principal faculty advisor: Judith Hough-Goldstein, Dept. of Entomology & Wildlife Ecology. Includes bibliographical references.
9

Allelopathic potential of the alien invader weed Campuloclinium macrocephalum(Less) D.C.

Dixon, Gemma Michelle. January 2009 (has links)
Thesis (M.Inst.Agrar)(Agronomy)--University of Pretoria, 2008. / Summary in English. Includes bibliographical references.
10

The role of alien tree plantations and avian seed-dispersers in native dry forest restoration in Hawaiʻi

Garrison, Jennifer S. E. January 2004 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2003. / Includes bibliographical references (leaves 344-370).

Page generated in 0.0511 seconds