11-19-07 Science Advisory Board (sab) Hypoxia Panel Draft Advisory Report Do Not Cite or Quote




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Table 1: A partial summary of papers published following the Integrated Assessment related to sources of organic matter to the Gulf of Mexico.










General Topics and issues

Comments regarding OM/hypoxia

Reference

Landside Sources

POC in river sands

similar in magnitude to suspended POC load in river

Bianchi et al., 2002

Sedimentation of river POC

high deposition of terrestrial POC in plume region

Corbett et al., 2004

Relict peats

source of old organic matter to plume area

Galler et al., 2003

Seasonal transport of POC

fluid muds are transported seasonally to GOM

McKee et al., 2004

Sediment storage and transport

seasonal transport of mobile muds from delta to shelf

Corbett et al., 2006

River OM loads

DOC and DON loads to GOM

Bianchi et al., 2004; Duan et al., 2007

River inputs

transport of river diatoms to plume area

Wysocki et al., 2006; Duan and Bianchi, 2006

Terrestrial OM

fate of lignin

Hemes and Berner, 2003

Riverine DON

photoammonification of DON to DIN

Pakulski et al., 2000

Riverine OM and nutrients

effects of flow through coastal wetlands

Xu, 2006

Riverine DOM

CDOM analysis

Chen and Gardner, 2004

Marsh/estuary DOC

high DOC concentrations in these systems

Engelhaupt and Bianchi, 2001

OM distribution

sources and fate of OM from rivers to shelf

Gordon et al., 2001

Water Column/ Sediment Processes

Flocculation and sedimentation

enhanced process in plume area; high rates

Dagg et al., 2004

Light field

light absorption/scattering limiting production

D’Sa and Miller, 2003

Plankton characteristics

satellite-based relations between N-loads and chlorophyll

Walker and Rabalais, 2006

Plume budget

CO2 budget in plume

Cai, 2003

OM source

high rates of plankton production west of plume

Dagg et al., in press

Deposition

Influence of larvaceans on deposition

Dagg and Brown, 2005

DOM characteristics

lability of DOM in Region II

Benner and Opsahl, 2001

Sediment DOC

release of DOC from shelf sediments

Sutula et al., 2004

Fate of benthic diatoms

benthic diatom shunted to MR canyon; cleansing effect

Bianchi et al., 2006

Hurricane effects

storm transport of deposited materials-decadal scale

Corbett et al., 2006

Sediment processes

ammonium flux from sediments important for plankton

Eldridge and Morse, 2007

Plankton composition

diatom occurrence in western regions of hypoxic zone

Warwick and Paul, 2004

Plankton composition

microbial processes in shelf waters

Liu et al., 2004

Synthesis/Overviews

OM budget

carbon budget for plume area

Green et al., 2006b

Conceptual model/synthesis

planktonic dynamics of region outside plume

Dagg and Breed, 2003

Model analysis

differences between water and sediment respiration

Hetland and DiMarco, 2007

Statistical model

relates N-load to hypoxia; phytoplankton OM implied

Scavia et al., 2003

Water column synthesis

plume contributions to hypoxia; gaps in understanding

Dagg et al., in press

Review/synthesis

new monitoring data strengthens nutrient/hypoxia model

Rabalais et al., 2007

Nutrient/Organic loads

confirms Integrated Assessment, wetland loss small OM source

Turner et al., in press

Forecasting hypoxia

examines models and suggests nutrients major driver

Justic et al., in press

Primary production-nitrate model

model indicates buffered response to N-load reductions

Green et al., in press

Concepts of hypoxic zones

suggests spatial dimensions/processes in hypoxic zones

Rowe and Chapman, 2002

* Entries are shown for a variety of topics and comments are focused on issues related to organic matter in the GOM. This table is not a complete summary of all papers published on this subject; rather it provides an indication of the great diversity of studies conducted since the Integrated Assessment.



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