Macroinvertebrate responses to watershed land use and local-scale stream restoration
by Violin, Christy Royer, Ph.D., THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL, 2011, 171 pages; 3477614

Abstract:

Human land use practices have resulted in the widespread degradation of waterways draining the surrounding landscape, resulting in poorly functioning streams with lower biological diversity than streams in undisturbed watersheds. Stream restoration has become an increasingly popular method for ameliorating local-scale degradation. Current stream restoration methodology reconfigures channel morphology to reflect a pre-degradation ideal, and relies on habitat provision as the primary means to facilitate biotic community recovery. However, there is little information on the success of this approach. This dissertation focuses on the consequences of urban land use for macroinvertebrate stream community structure and the potential for Natural Channel Design, a common reach scale restoration method, to ameliorate stream degradation due to catchment based land use in various catchment types. In two studies examining macroinvertebrate community response to stream restoration, Natural Channel Design did not lead to improvement in macroinvertebrate community structure, and failed to restore habitat in the urban stream restorations surveyed. A structural equation modeling approach suggests that the factors most associated with community degradation are not currently addressed by reach-scale restoration. This suggests a need to shift restoration strategies away from a strictly reach-scale approach to a multi-scale approach which incorporates watershed scale processes.

 
AdviserSeth R. Reice
SchoolTHE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
SourceDAI/B 73-01, p. , Nov 2011
Source TypeDissertation
SubjectsEcology; Evolution & development
Publication Number3477614
Adobe PDF Access the complete dissertation:
 

» Find an electronic copy at your library.
  Use the link below to access a full citation record of this graduate work:
  http://gateway.proquest.com/openurl%3furl_ver=Z39.88-2004%26res_dat=xri:pqdiss%26rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation%26rft_dat=xri:pqdiss:3477614
  If your library subscribes to the ProQuest Dissertations & Theses (PQDT) database, you may be entitled to a free electronic version of this graduate work. If not, you will have the option to purchase one, and access a 24 page preview for free (if available).

About ProQuest Dissertations & Theses
With over 2.3 million records, the ProQuest Dissertations & Theses (PQDT) database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research.

The database includes citations of graduate works ranging from the first U.S. dissertation, accepted in 1861, to those accepted as recently as last semester. Of the 2.3 million graduate works included in the database, ProQuest offers more than 1.9 million in full text formats. Of those, over 860,000 are available in PDF format. More than 60,000 dissertations and theses are added to the database each year.

If you have questions, please feel free to visit the ProQuest Web site - http://www.proquest.com - or call ProQuest Hotline Customer Support at 1-800-521-3042.