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  • 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.
21

Indirect effects of metal-contamination on energetics of yellow perch (Perca flavescens) in Sudbury area lakes, resulting from food web simplification

Iles, Alison. January 1900 (has links)
Thesis (M.Sc.). / Written for the Dept. of Biology. Title from title page of PDF (viewed 2008/07/24). Includes bibliographical references.
22

Trophic structure and the importance of terrestrial wetland producers for aquatic food webs in tropical Australian estuaries /

Abrantes, Kátya Gisela dos Santos. January 2008 (has links)
Thesis (Ph.D.) - James Cook University, 2008. / Typescript (photocopy) Bibliography: leaves 198-218.
23

Temporal and spatial variations of cyanobacteria in Karori Reservoir, Wellington

Prentice, Matthew James. January 2008 (has links)
Thesis (M.Sc. Biological Science)--University of Waikato, 2008. / Title from PDF cover (viewed September 18, 2008) Includes bibliographical references (p. 84-96)
24

A stable isotope analysis of food web structure in Lake Superior

Harvey, Christopher James. January 1900 (has links)
Thesis (Ph. D.)--University of Wisconsin, Madison, 2001. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
25

The benthic ecology and food web dynamics of Te Waihora (Lake Ellesmere) : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Ecology in the University of Canterbury /

Wood, Hannah F. January 1900 (has links)
Thesis (M. Sc.)--University of Canterbury, 2008. / Typescript (photocopy). "June 2008." Includes bibliographical references (leaves 74-84). Also available via the World Wide Web.
26

The effects of extirpation of frogs on the trophic structure in tropical montane streams in Panama /

Hunte-Brown, Meshagae Endrene. Kilham, Susan Soltau, January 2006 (has links)
Thesis (Ph. D.)--Drexel University, 2006. / Includes abstract and vita. Includes bibliographical references.
27

FOOD WEB MODELING TO ASSESS INTERACTIONS BETWEEN ARTIFICIAL REEFS AND NATURAL REEFS

Unknown Date (has links)
The effect of artificial reefs on natural reefs is poorly understood. This study focused on Aquarius Reef Base (ARB), an underwater habitat offshore of Key Largo, Florida, and 14 natural reef sites spanning 4 habitats, on the surrounding Conch Reef. Food web models were created for ARB and natural reef habitats. Biomass at each habitat was quantified by fish surveys. Using Ecopath, species were organized into functional groups with supporting data from previous research for other inputs. ARB’s food web was found to have a large predator biomass with insufficient prey biomass to sustain the population, suggesting that these predators must forage on nearby natural reefs where the predator/prey ratio is smaller. Between 0.57km2 and 1.79km2 of natural reef is estimated to be a sufficient spatial subsidy for the large predatory biomass at ARB when the biomass is added as determined by the seascape around the artificial reef. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2021. / FAU Electronic Theses and Dissertations Collection
28

Fate and metabolism of BAS 290-H in a model ecosystem

Chang, Kuo-Mei 01 August 1973 (has links)
The use of chemicals to control economic pests has grown in this century both in the amount and the diversity of materials used (Headley and Lewis, 1967). About ten billion pounds of pesticides have been used in the United States since 1945. It is estimated that there are 340 million acres of cultivated lands in the Continental United States. Of this amount, approximately 119 million acres were sprayed with herbicides, 97 million acres were treated with insecticides and 25 million acres were treated with fungicides and other minor pesticides (Matsumura, 1972).
29

Trophic dynamics of marine nekton and zooplankton within the northern California Current pelagic ecosystem /

Miller, Todd William. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2006. / Includes bibliographical references. Also issued online.
30

Trophic dynamics of marine nekton and zooplankton within the Northern California Current pelagic ecosystem /

Miller, Todd William. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 172-174). Also available on the World Wide Web.

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