NSF Org:	DEB Division Of Environmental Biology
Recipient:	STROUD WATER RESEARCH CENTER INC
Initial Amendment Date:	September 22, 1999
Latest Amendment Date:	June 20, 2003
Award Number:	9904047
Award Instrument:	Continuing Grant
Program Manager:	Martyn M. Caldwell DEB  Division Of Environmental Biology BIO  Directorate for Biological Sciences
Start Date:	September 1, 1999
End Date:	August 31, 2004 (Estimated)
Total Intended Award Amount:	$1,447,783.00
Total Awarded Amount to Date:	$1,654,474.00
Funds Obligated to Date:	FY 1999 = $518,582.00 FY 2000 = $526,495.00 FY 2001 = $528,354.00 FY 2002 = $71,043.00 FY 2003 = $10,000.00
History of Investigator:	Louis Kaplan (Principal Investigator) lakaplan@stroudcenter.org Marco Colombini (Co-Principal Investigator) David Stahl (Co-Principal Investigator) Robert Findlay (Co-Principal Investigator) Patrick Hatcher (Co-Principal Investigator)
Recipient Sponsored Research Office:	Stroud Water Research Center 970 SPENCER RD AVONDALE PA  US  19311-9514 (610)268-2153
Sponsor Congressional District:	06
Primary Place of Performance:	Stroud Water Research Center 970 SPENCER RD AVONDALE PA  US  19311-9514
Primary Place of Performance Congressional District:	06
Unique Entity Identifier (UEI):	J7MLUBQMXRD1
Parent UEI:
NSF Program(s):	ECOSYSTEM STUDIES
Primary Program Source:	app-0100  01000102DB NSF RESEARCH & RELATED ACTIVIT app-0102  app-0103  app-0199
Program Reference Code(s):	7218, 9169, 9177, 9178, 9179, 9189, 9251, EGCH, SMET
Program Element Code(s):	118100
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.074

ABSTRACT

Abstract

99-04047
Kaplan

Dissolved organic matter biogeochemistry: Linking ecosystem processes, community structure and microbial dynamics in streams

The investigators in this research effort ask a simple, critical and little understood question in ecosystem studies: How do bacterial communities process dissolved organic matter in streams? To answer this question the PIs, including scientists and students from 5 institutions, will investigate: 1) what dissolved organic food resources and bacterial consumers are in a particular stream; 2) how the organic chemistry of the water and composition of the bacterial community respond to seasonal changes and other disturbances; 3) whether bacterial communities can process organic matter from different streams and habitats; and 4) how bacteria respond to changes in the quantity and quality of their food supply. This project bridges three disciplines: biogeochemistry, microbial ecology and ecological theory. It also encompasses three distinct biomes: Eastern deciduous, Southern coniferous and Tropical evergreen. Beyond contributions to our basic understanding of stream ecosystems and microbial ecology, this research has broad implications for the biological treatment of drinking waters and the remediation of organically polluted environments.

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