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Mapping and Assessment of Global Wet...

Fluet-Chouinard, Etienne.

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Mapping and Assessment of Global Wetland Cover: Implications for Biodiversity Conservation and Inland Fisheries.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Mapping and Assessment of Global Wetland Cover: Implications for Biodiversity Conservation and Inland Fisheries./
Author:	Fluet-Chouinard, Etienne.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	120 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Contained By:	Dissertation Abstracts International79-11B(E).
Subject:	Limnology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10829513
ISBN:	9780438082540

Mapping and Assessment of Global Wetland Cover: Implications for Biodiversity Conservation and Inland Fisheries.
Fluet-Chouinard, Etienne.

Mapping and Assessment of Global Wetland Cover: Implications for Biodiversity Conservation and Inland Fisheries. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 120 p.

Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2018.

Freshwater ecosystems provide valuable benefits to human societies and sustain rich biodiversity as well as withstand pressure from human activities worldwide. This dissertation contributes three studies improving our understanding of different aspects of freshwater ecosystems across the world. First, I investigate the long-term pattern of wetland conversion throughout history. I combine modeled potential wetland extent and land use to estimate that global wetland cover has decreased by 17% over the last 8000 years. Although high since 1700, these rates of wetland loss are lower than the > 50% loss previously estimated from regional drainage records but vary substantially across regions. Second, in addition to ecosystem conversion, an array of physical, chemical and biological stressors stemming from human activities are impacting the structure and function of aquatic ecosystems. These stressors are assessed globally with cumulative threat indices composited from available maps and expert opinion, however, it is unknown how well these indices translate into observable impact on the ground. To bridge this gap, I compared these stressor indices with in-situ data of ecosystem stressors from the global network of Ramsar Sites. I found poor agreement between globally mapped and locally reported stressors, which highlights the challenge of monitoring individual stressors and the opportunities to harmonize parallel approaches to stressor monitoring. Third, the value of services provided by freshwater ecosystems, such as fisheries, is often underrecognized, and leads to misrepresentation of conservation benefits. I estimated global inland fish harvest, long suspected to be underreported in official statistics, by back-calculating from household-level fish consumption and found that inland fish catch has been under-estimated by 65%, and much more in certain countries. These hidden harvests indicate that inland fisheries play a greater role in human nutrition than previously recognized. Taken together, these dissertation chapters highlight how improved assessment and monitoring of freshwater ecosystems at the global scale strengthen the case for protection and stewardship of these ecosystems.

ISBN: 9780438082540Subjects--Topical Terms:

545788
Limnology.

Mapping and Assessment of Global Wetland Cover: Implications for Biodiversity Conservation and Inland Fisheries.
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