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Description:
Author(s):
Gray, S. C.
Title:
A comparative analysis of sedimentation and water quality in mangrove, shore, bay and reef environments below a developed vs. an undeveloped watershed, St. John, US Virgin Islands
Publication Date:
2012
Institution:
Marine Science and Environmental Studies Department, University of San Diego
Page(s):
28
Type Period Note:
Final Project Report, 7/1/2010 - 12/31/2011
Abstract:
"Our study examined sediments in three reservoirs in the bays: suspended sediments (water samples), settling sediments (sediment traps) and accumulated sediments (bay-floor benthic surface samples). In addition we have measured marine water quality and our regular sampling sites and at strategic locations above our shore sediment traps. Our project aimed to address the following questions: 1) What are the composition (grain size distribution, organic matter type and quantity, mineralogy, and relative carbonate/siliceous ratio, chemical composition) and quantity (flux rate or concentration) of suspended, settling, and accumulated sediments collected between 7/1/10-6/30/11? 2) How do these characteristics vary temporally during the study period (and with previous seasons), with environmental parameters (storms, runoff, wind and currents) and with watershed changes (such as new development or sediment mitigation)? 3) For the reef sites, is there a relationship between parameters of sediment flux and the condition of the reefs? 4) How do parameters of water quality (TSS, turbidity, elemental chemistry) vary between different areas with different types and degrees of development? Our specific educational and public outreach objectives were to: a) establish scientific and educational collaborative partnerships with scientists working in the USVI and interested citizens; b) inform students and the public about the impacts of watershed development on corals reefs, and c) provide tangible data for territorial and local environmental managers to inform policy decisions."
Electronic Access:
Notes:
NOAA CRCP grant NA10NMF4630065
Grant Number(s):
NA10NMF4630065
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