• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 45
  • 10
  • 4
  • 1
  • Tagged with
  • 85
  • 85
  • 74
  • 19
  • 16
  • 13
  • 10
  • 10
  • 10
  • 8
  • 7
  • 7
  • 7
  • 6
  • 6
  • 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.
51

Plant and Herpetofaunal Responses to Wetland Restoration on Pinckney Island National Wildlife Refuge, Beaufort County, South Carolina

Clark, Sabrina Diane 05 May 2007 (has links)
Habitat destruction and modification are major causes cited for the decline of amphibians worldwide (Wake and Morowitz 1991). Depressional wetlands on Pinckney Island NWR in Beaufort County, South Carolina were ditched and drained during the 1950?s for agricultural development. Wetlands were restored by filling ditches with existing spoil. I surveyed herpetofaunal and vegetation communities to determine responses to wetland restoration on Pinckney Island from 2004-2005. I selected ten wetlands each in pine and maritime habitats, sampling prior to and after restoration. I recorded 14 reptile and 9 amphibian species using time-constrained searches and funnel trap arrays. I documented (first record on the Island) Fowler?s toad (Bufo woodhousei) and many-lined salamander (Stereochilus marginatus). There were differences between amphibian species richness recorded using time constrained surveys and funnel trap arrays, amphibian species abundance between pine and maritime forest, and between number of Eastern spadefoot toads (Scaphiopus holbrooki) before and after restoration.
52

An Internship with the Okefenokee National Wildlife Refuge, U.S.Fish and Wildlife Service, Folkston, Georgia

Kamesh, Roopa 01 October 2003 (has links)
No description available.
53

An Internship in Conservation Biology with the U.S. Fish and Wildlife Service

Wolf, Morgan Kay 11 December 2009 (has links)
No description available.
54

Population Dynamics of Small Mammals in two Plant Communities of the Merritt Island National Wildlife Refuge

Goldberg, Jeffrey A. 01 April 1980 (has links) (PDF)
No description available.
55

HUMAN/WILDLIFE INTERACTIONS, BOSQUE DEL APACHE NATIONAL WILDLIFE REFUGE.

COOPER, TAMSIE ANN. January 1982 (has links)
Human/wildlife interactions at the Bosque del Apache National Wildlife Refuge were investigated in this research. Personal interviews and a mapping exercise were used to examine a variety of questions about recreational use. These included visitor backgrounds (their recreational histories, socioeconomic profiles, and past refuge visits), their perceptions (of current and proposed management policies, and visitor effects on wildlife), and their experiences of the refuge (their activities, most memorable experiences and exploration of the environment). Most visitors questioned were middle-aged individuals who resided in New Mexico. The refuge's unique character--its diversity of wildlife and landscape features--was perceived as its greatest asset. Visitors saw the refuge as a wildlife sanctuary, protected and controlled by officials who prevented visitors from having damaging impacts on the resource. While visitors differed by season of visit and purpose of visit, most did agree that the refuge should be managed for the sake of wildlife first. After that, visitors felt that it should be managed for the sake of recreation. Snow Geese responses to certain visitor behaviors were also examined. Simulations of visitor behaviors were made in the presence of small groups of geese. Behavioral observations of geese were made prior to, during, and after simulations. Environmental factors (weather, habitat, and temporal) were also examined. This analysis revealed a general tendency among geese to respond to visitor simulations in characteristic ways. However, variations in geese responses were also observed. Several factors may have most strongly influenced geese behavior. The predictability of visitor behaviors as perceived by geese influenced their patterns of response. Then too, certain environmental factors (habitat and temporal) were important, as well as the particular nature of the animal behaviors themselves. This research indicates that significant transactions occur between people, animals, and the environment. Understanding them is crucial in managing natural resources for ecological as well as recreational values.
56

Habitat suitability modeling for the Mississippi Sandhill Crane, Grus canadensis pulla

Salande, Linda C 10 August 2016 (has links)
In this study, I modeled the suitability of habitat on the Mississippi Sandhill Crane National Wildlife Refuge for the federally endangered Mississippi Sandhill Crane (Grus Canadensis pulla). Habitat type and suitability changed over time due to seasonality of vegetation and succession in the absence of burning. Cranes used highly suitable habitat more in the non-growing than in the growing season, and may have been more constrained by resource availability during winter months. Cranes used some less-suitable areas including cypress drains, which provide roosting sites, and supplemental food plots. The mismatch between predicted quality and crane use suggests that no single habitat provides all resources required for the population to persist. Prescribed burning to maintain grassland habitat is essential for maintaining high quality habitat for cranes. The relative availability of food on supplemental food plots and grasslands, as well as the behavior of cranes toward roads, require additional investigation.
57

Determination of the value to planners of incorporating ecotourist needs data in the interpretive planning process

Masberg, Barbara Ann 15 October 1992 (has links)
The purpose of this study was to answer the following question: What was the perceived value to planners of incorporating information from ecotourists about their perceived needs in the standard system presently being used to plan interpretation? The Ecotourist Needs Assessment (ETNA) process was proposed as an external needs assessment. To exemplify this process, an instrument called Ecotourist Needs Assessment Instrument (ETNAI) was developed to collect input from ecotourists who visited the Malheur National Wildlife Refuge. A case resulted from the process. The ETNAI case was used to obtain planners' opinions about whether ETNA had value in the context of data collection and inventory in interpretive planning. The ETNAI case included developing and validating the ETNAI and providing a procedure for implementing ETNAI. Upon completion of the ETNAI case, an interview guide was developed and administered to interpretive planners. Interpretive planners were asked how they currently plan interpretation and collect information to decide interpretive topics. Other questions dealt with their feelings regarding the usefulness of the ETNA and the data collected using the ETNA. The interpretive planners described the current system and provided information about the proposed system (ETNA). Currently, decisions involving interpretation are based on three factors: 1) money, 2) mandates/missions, and/or 3) management. The interpretive planner chose outside (external) groups except during a master planning process when the general public provided input. The outside groups included: professionals, the public, and recreation providers. The current methods used to collect information were informal or considered casual. When contrasted with the proposed method, the interpretive planners felt the ETNA had value. This was reflected in their suggestions for use: As an evaluation tool after an interpretive program is given to a specific audience. As a method to assess the interpretive needs of visitors and specific audiences for interpretation. As a technique to access visitors and the public, both general and specific. As a mechanism to collect data at public meetings. As a systematic routine to develop interpretation, to provide feedback for further development, and to evaluate interpretation embedded in the site system. As a method to effectively determine the distribution of funds. / Graduation date: 1993
58

Archaeological Survey and Testing on St. Vincent Island, Northwest Florida

Kimble, Elicia Victoria 01 January 2012 (has links)
St. Vincent Island is one of the barrier islands in the Florida panhandle between Apalachicola Bay and the Gulf of Mexico. The St. Vincent National Wildlife Refuge encompasses all 5000 hectares of the island. Archaeological fieldwork in the summer of 2009 included a survey of the entire island and a test unit at one of the island's richest sites. In spring of 2010 a second test unit was excavated at another archaeologically rich site. A total of 16 known sites were investigated and two newly discovered sites recorded. This research combines all these data with information obtained from existing artifact collections and archives, as well as results of a widespread geological survey of the island, in order to characterize the prehistoric archaeological record on the island, which stretches back at least 4000 years or more, to the time of the island's first formation. Subsistence, settlement patterns, site use, and change through time in the human adaptation on St. Vincent are described in relation to the preexisting cultural chronology of the region, especially that of other barrier islands. Settlement from all time periods is concentrated on the north and east shorelines, with not much human use of the island interior until recent historic time. Geological indication of sea level fluctuations on the islands oldest shoreline section, on the northeast tip, is combined with archaeological evidence to suggest responses to rising sea levels.
59

Prophets vs profits : a globalist clash of worldviews in Alaska's oil wars

Standlea, David M, 1956 January 2004 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2004. / Includes bibliographical references (leaves 245-267). / vi, 267 leaves, bound 29 cm
60

Seasonal habitat use of the Florida manatee (Trichecus manatus latirostris) in the Crystal River National Wild[l]ife Refuge with regards to natural and anthropogenic factors

Berger, Ryan W. January 2007 (has links) (PDF)
Thesis (M.S.)--Georgia Southern University, 2007. / Title from PDF title page (viewed on Feb. 19, 2008). Electronic version approved: May 2007. Vita. Includes bibliographical references.

Page generated in 0.0247 seconds