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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

The influence of cow age on grazing distribution and utilization of mountain riparian areas and adjacent uplands

Morrison, Julie A. 31 May 2002 (has links)
The objective of this study was to evaluate the influence of cow age on grazing distribution relative to mountain riparian areas. In each of two years, sixty cow-calf pairs were stratified by age into the following treatments: 1) thirty first calf heifers (442 kg, body condition score (BCS)=4.5), and 2) thirty mature cows (5-7 years of age; 569 kg, BCS=5.0). From late July to early September, treatments were randomly assigned to four pastures with treatments reversed in Year 2. Analysis of hourly cattle locations observed during 4-d periods early (d 15 to d 18) and late (d 36 to d 39 in Year 1; d 29 to d 32 in Year 2) during the grazing bout revealed a three-way interaction between cow age, time of day, and grazing bout (P<0.01). In the morning hours of the early grazing bout, mature cows distributed farther from the stream (P<0.10), and occupied the riparian vegetation type less (P<0.10) than first calf heifers. No differences (P>0.10) in distribution occurred between age classes from 1300 h until dark. Similarly, during the late grazing bout, no differences were observed (P>0.10) between the distribution of the age classes. While no difference (P=0.20) occurred between age classes in total minutes spent grazing, first calf heifers foraged longer during the morning and evening bouts (P<0.10). The forage utilization pattern and the fecal deposits within 1-m of the stream were not different (P>0.10) between age classes. While mature cows tended (P=0.17) to have higher dry matter intake (DMI), first calf heifers consumed more feed per unit of body weight (BW) (P=0.08). Though first calf heifers tended (P=0.13) to gain more BW, no differences occurred between age classes in BCS change (P=0.69), or calf average daily gain (ADG) (P=0.34). In summary, mature cows distributed farther from water and spent more time outside the riparian vegetation zones during the morning hours early (d 15 to d 18) in the trial compared to first calf heifers. / Graduation date: 2003
22

Anthropogenic impacts on riparian forest loss in East Tennessee a GIS analysis /

Burhenn, Karen Elizabeth. January 2001 (has links) (PDF)
Thesis (M.S.)--University of Tennessee, Knoxville, 2001. / Vita. Includes bibliographical references (leaves 67-73).
23

Aquatic-terrestrial linkages in Appalachian streams influence of riparian inputs on stream habitat, brook trout populations, and trophic dynamics /

Sweka, John A. January 1900 (has links)
Thesis (Ph. D.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains viii, 198 p. : ill., maps. Vita. Includes abstract. Includes bibliographical references.
24

Spatial organization, position, and source characteristics of large woody debris in natural systems /

Fox, Martin J. January 2003 (has links)
Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 70-77).
25

Morphologic and meristic characteristics of lacustrine coarse woody structure as fish habitat /

Newbrey, Michael G. January 2002 (has links) (PDF)
Thesis (M.S.)--University of Wisconsin--Stevens Point, 2002. / Includes bibliographical references (leaves 52-56).
26

Effects of high groundwater nitrate inputs on riparian conifer forest growth and associated plant-soil interactions /

Bravo, Dianne. January 2006 (has links)
Thesis (M.Sc.)--York University, 2006. Graduate Programme in Geography. / Typescript. Includes bibliographical references (leaves 72-80). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://proquest.umi.com/pqdweb?index=0&did=1240698881&SrchMode=1&sid=8&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1195137688&clientId=5220
27

Modeling channel erosion in cohesive streams of the Blackland Prairie, Texas at the watershed scale

Capello, Stephanie V. Allen, Peter M., January 2008 (has links)
Thesis (M.S.)--Baylor University, 2008. / Includes bibliographical references (p. 61-67)
28

Factors influencing diet composition of beef cattle grazing mixed conifer mountain riparian areas /

Darambazar, Enkhjargal. January 2003 (has links)
Thesis (M.S.)--Oregon State University, 2004. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
29

Soil quality and stream channel characteristics of montane and subalpine riparian meadows, Sierra Nevada, California

Jungst, Laura J. January 2008 (has links)
Thesis (M.S.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Mar. 22, 2010). Includes bibliographical references.
30

Differences between burned and unburned riparian systems in northern Nevada

Schmidt, Kurtiss M. January 2008 (has links)
Thesis (M.S.)--University of Nevada, Reno, 2008. / "December, 2008." Includes bibliographical references (leaves 25-29). Online version available on the World Wide Web.

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