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Prioritizing stream restoration in a...

The University of Wisconsin - Madison.

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Prioritizing stream restoration in agricultural landscapes.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Prioritizing stream restoration in agricultural landscapes./
作者:	Diebel, Matthew Whitney.
面頁冊數:	163 p.
附註:	Adviser: M. Jake Vander Zanden.
Contained By:	Dissertation Abstracts International69-05B.
標題:	Biology, Limnology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3314303
ISBN:	9780549634461

Prioritizing stream restoration in agricultural landscapes.
Diebel, Matthew Whitney.

Prioritizing stream restoration in agricultural landscapes. - 163 p.

Adviser: M. Jake Vander Zanden.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.

As a whole, this thesis supports the hypothesis that streams and watersheds vary in their potential to respond to restoration activities, and provides methods for targeting those activities where they are most likely to produce measurable benefits.

ISBN: 9780549634461Subjects--Topical Terms:

1018638
Biology, Limnology.

Prioritizing stream restoration in agricultural landscapes.
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500 $a Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2759.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.
520 $a As a whole, this thesis supports the hypothesis that streams and watersheds vary in their potential to respond to restoration activities, and provides methods for targeting those activities where they are most likely to produce measurable benefits.
520 $a Agricultural land use is the dominant cause of impairment of rivers and streams in the United States, primarily through its contribution to non-point source pollution. Stream restoration through watershed and riparian land management has the potential to reverse much of this degradation. In this thesis, I explored the hypothesis that the degree to which land management can contribute to restoration goals varies over the landscape. This variability was formalized into models of restoration potential to support efforts by the State of Wisconsin to prioritize and allocate management activities.
520 $a Statistical simulations on a model agricultural landscape were used to compare four alternative approaches for the spatial allocation of management activities. Targeting activities at two nested spatial scales (field and watershed) achieves phosphorus reductions most efficiently, particularly when phosphorus is measured at the watershed outlet. This method also facilitates experimentation and adaptive management.
520 $a Based on regression models, sediment and phosphorus loads in Wisconsin streams are driven by riparian land cover and physiographic patterns. The potential for pollutant load reduction following watershed-scale implementation of riparian buffers was modeled as the estimated current load minus the fraction that buffers are not capable of attenuating. In most watersheds, &sim;70% of current loads could be retained by buffers.
520 $a Spatial autoregressive models were used to predict the response of six stream fish species to watershed restoration. GIS-derived environmental characteristics at both local and regional scales were significant predictors of species' occurrence. After accounting for the proximity of potential restoration sites to existing suitable habitat, the extent of streams predicted restorable for each species was small (0.4-8% of all streams).
520 $a The nitrogen stable isotope ratio (delta15N) of biological tissue has potential to serve as an indicator of anthropogenic nitrogen inputs to aquatic ecosystems. A survey of Wisconsin streams in agricultural settings indicated that denitrification of inorganic fertilizer has a greater influence than manure on nitrogen stable isotope ratios.
590 $a School code: 0262.
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