Effects of discharge and substrate characteristics on FPOM retention

I released chloride and corn pollen into artificial streams to study the effects of discharge, substrate size, leaf packs, and pools on the retention and transport of fine particulate organic matter (FPOM). I found that doubling discharge significantly decreased both hydraulic and FPOM retention (me...

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Main Author: Ward, Brian Richard
Other Authors: Biology
Format: Others
Language:en
Published: Virginia Tech 2014
Subjects:
Online Access:http://hdl.handle.net/10919/44482
http://scholar.lib.vt.edu/theses/available/etd-08292008-063255/
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spelling ndltd-VTETD-oai-vtechworks.lib.vt.edu-10919-444822021-06-22T05:29:13Z Effects of discharge and substrate characteristics on FPOM retention Ward, Brian Richard Biology artificial stream discharge FPOM retention substrate transient storage LD5655.V855 1996.W369 I released chloride and corn pollen into artificial streams to study the effects of discharge, substrate size, leaf packs, and pools on the retention and transport of fine particulate organic matter (FPOM). I found that doubling discharge significantly decreased both hydraulic and FPOM retention (measured as pollen uptake length). However, quadrupling discharge returned both hydraulic and FPOM retention to original or higher values. There was a strong positive relationship between FPOM depositional velocity and discharge (r² = 0.846, p < 0.0001), and between FPOM depositional velocity and turbulence (r² = 0.831, p < 0.0001). Depositional velocity for all experiments was considerably less than predicted by the “fall-velocity model”. Substrate size controlled hydraulic retention through the size of interstitial spaces in the bed and FPOM retention through substrate-created turbulence. Small gravel substrate had the largest transient storage zone relative to stream cross-sectional area. Large gravel substrate had the highest depositional velocity of pollen and the most turbulence. Cobble had the least hydraulic and FPOM retention. Adding leaf packs significantly decreased hydraulic and FPOM retention. However, the number of leaf packs made little difference. Adding pools significantly increased hydraulic retention and FROM depositional velocity. Master of Science 2014-03-14T21:43:59Z 2014-03-14T21:43:59Z 1996 2008-08-29 2008-08-29 2008-08-29 Thesis Text etd-08292008-063255 http://hdl.handle.net/10919/44482 http://scholar.lib.vt.edu/theses/available/etd-08292008-063255/ en OCLC# 35920288 LD5655.V855_1996.W369.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ x, 76 leaves BTD application/pdf application/pdf Virginia Tech
collection NDLTD
language en
format Others
sources NDLTD
topic artificial stream
discharge
FPOM
retention
substrate
transient storage
LD5655.V855 1996.W369
spellingShingle artificial stream
discharge
FPOM
retention
substrate
transient storage
LD5655.V855 1996.W369
Ward, Brian Richard
Effects of discharge and substrate characteristics on FPOM retention
description I released chloride and corn pollen into artificial streams to study the effects of discharge, substrate size, leaf packs, and pools on the retention and transport of fine particulate organic matter (FPOM). I found that doubling discharge significantly decreased both hydraulic and FPOM retention (measured as pollen uptake length). However, quadrupling discharge returned both hydraulic and FPOM retention to original or higher values. There was a strong positive relationship between FPOM depositional velocity and discharge (r² = 0.846, p < 0.0001), and between FPOM depositional velocity and turbulence (r² = 0.831, p < 0.0001). Depositional velocity for all experiments was considerably less than predicted by the “fall-velocity model”. Substrate size controlled hydraulic retention through the size of interstitial spaces in the bed and FPOM retention through substrate-created turbulence. Small gravel substrate had the largest transient storage zone relative to stream cross-sectional area. Large gravel substrate had the highest depositional velocity of pollen and the most turbulence. Cobble had the least hydraulic and FPOM retention. Adding leaf packs significantly decreased hydraulic and FPOM retention. However, the number of leaf packs made little difference. Adding pools significantly increased hydraulic retention and FROM depositional velocity. === Master of Science
author2 Biology
author_facet Biology
Ward, Brian Richard
author Ward, Brian Richard
author_sort Ward, Brian Richard
title Effects of discharge and substrate characteristics on FPOM retention
title_short Effects of discharge and substrate characteristics on FPOM retention
title_full Effects of discharge and substrate characteristics on FPOM retention
title_fullStr Effects of discharge and substrate characteristics on FPOM retention
title_full_unstemmed Effects of discharge and substrate characteristics on FPOM retention
title_sort effects of discharge and substrate characteristics on fpom retention
publisher Virginia Tech
publishDate 2014
url http://hdl.handle.net/10919/44482
http://scholar.lib.vt.edu/theses/available/etd-08292008-063255/
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