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Quantity, composition, and source of sediment collected in sediment traps along the fringing coral reef off Molokai, Hawaii

Marine Pollution Bulletin

By:
, , , , and
DOI: 10.1016/j.marpolbul.2006.01.008

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Abstract

Sediment traps were used to evaluate the frequency, cause, and relative intensity of sediment mobility/resuspension along the fringing coral reef off southern Molokai (February 2000–May 2002). Two storms with high rainfall, floods, and exceptionally high waves resulted in sediment collection rates > 1000 times higher than during non-storm periods, primarily because of sediment resuspension by waves. Based on quantity and composition of trapped sediment, floods recharged the reef flat with land-derived sediment, but had a low potential for burying coral on the fore reef when accompanied by high waves.


The trapped sediments have low concentrations of anthropogenic metals. The magnetic properties of trapped sediment may provide information about the sources of land-derived sediment reaching the fore reef. The high trapping rate and low sediment cover indicate that coral surfaces on the fore reef are exposed to transient resuspended sediment, and that the traps do not measure net sediment accumulation on the reef surface.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Quantity, composition, and source of sediment collected in sediment traps along the fringing coral reef off Molokai, Hawaii
Series title:
Marine Pollution Bulletin
DOI:
10.1016/j.marpolbul.2006.01.008
Volume
52
Issue:
9
Year Published:
2006
Language:
English
Publisher:
Elsevier
Contributing office(s):
Coastal and Marine Geology Program
Description:
14 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Marine Pollution Bulletin
First page:
1034
Last page:
1047
Country:
United States
State:
Hawaii
Other Geospatial:
Molokai