Graduation Year

2016

Date of Thesis Acceptance

Spring 5-11-2016

Major Department or Program

Biology - Environmental Studies

Advisor(s)

Paul Yancey, Allison Calhoun, Sophia Fox

Abstract

Freshwater flows out of the Herring River estuary at Cape Cod National Seashore have been restricted through a dike for nearly a century. Along with extensive salt marsh drainage efforts throughout the river’s small watershed, the dike’s tidal restriction has drastically altered geochemical transformations and the trophic structure of estuarine biota. Stagnant water conditions are prevalent throughout the upper estuary, leading to seasonal eutrophication. This thesis investigates the chemical and biological consequences of these ecosystem manipulations within a holistic examination of estuarine ecology and geochemical processes. Through the examination of water quality data collected during 2013-2015, this study corroborates past NPS findings on seasonal eutrophication, and presents strong evidence for the mobilization of metals from drained salt marsh sediments. Additional inquiries are made into potential mechanisms for autumnal acidification, the chemical implications of reduced salinity and oxygen levels, and the effects of stagnant, acidic, and reducing water conditions in the upper estuary.

Page Count

69

Subject Headings

United States National Park Service, Ecosystem management -- Research -- United States, Cape Doc National Seashore (Mass.) -- Herring River National Park, Cape Cod National Seashore (Mass.) -- Environmental conditions, Cape Cod (Mass.) -- Estuaries, Estuarine ecology, Eutrophication -- Massachusetts, Estuaries -- Massachusetts -- Cape Cod, Whitman College 2016 -- Dissertation collection -- Biology-Environmental Studies

Permanent URL

http://hdl.handle.net/10349/201608091318

Document Type

Public Accessible Thesis

Terms of Use

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