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Effects of Climate, Land Use, and La...

Motew, Melissa M.

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Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed./
Author:	Motew, Melissa M.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	213 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Contained By:	Dissertation Abstracts International78-10B(E).
Subject:	Environmental science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10287206
ISBN:	9781369829778

Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed.
Motew, Melissa M.

Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 213 p.

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2017.

Freshwater resources are critical to society and the biosphere, yet eutrophication due to phosphorus (P) enrichment plagues watersheds worldwide. Land use, land management, and climate represent important drivers of the P cycle, capable of altering the supply and transport of P across the landscape. This dissertation consists of three inquiries into how changing climate and land use/land management (LULM) may affect P cycling and water quality in the future, and what the implications might be for management.

ISBN: 9781369829778Subjects--Topical Terms:

677245
Environmental science.

Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed.
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245 1 0 $a Effects of Climate, Land Use, and Land Management on Phosphorus Cycling and Water Quality in the Yahara Watershed.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 213 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
500 $a Adviser: Christopher J. Kucharik.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2017.
520 $a Freshwater resources are critical to society and the biosphere, yet eutrophication due to phosphorus (P) enrichment plagues watersheds worldwide. Land use, land management, and climate represent important drivers of the P cycle, capable of altering the supply and transport of P across the landscape. This dissertation consists of three inquiries into how changing climate and land use/land management (LULM) may affect P cycling and water quality in the future, and what the implications might be for management.
520 $a Using a model of the Yahara Watershed, I investigate how historical nutrient management practices, represented by "legacy P", have influenced current and future conditions of lake water quality. Results show that (1) legacy P has a significant and long-lasting effect on the lakes, (2) there is currently an overabundance of soil P in the watershed, and (3) terrestrial P may interact synergistically with extreme rainfall in affecting lake water quality.
520 $a The second inquiry identifies a synergistic interaction between manure P and precipitation intensity in affecting water quality indicators at field, stream, and lake scales. The findings imply that high levels of terrestrial P supplied as manure can exacerbate water quality problems in the future as the intensity of rainfall events increases with climate change.
520 $a The final inquiry uses long-term scenarios to examine the relative influences of climate and LULM in affecting water quality. Results show that while climate plays a dominant role, LULM also plays an important role in driving outcomes. Climate has more influence at stream and lake scales than at the field scale, suggesting an inherent limitation for field scale LULM to influence downstream water quality. Reducing over-application of P is the most effective management strategy under all scenarios.
520 $a The results of my dissertation emphasize that the overabundance of P within the YW is a dominant biophysical control of surface water quality across spatial and temporal scales. Climate change will present a formidable challenge to the management of freshwater resources, yet strategies that focus on reducing legacy P and balancing P budgets on farms promise meaningful improvements in stream and lake conditions, as well as protective benefits.
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