EPA Science Inventory

Ecoenzymatic Stoichiometry of Stream Sediments with Comparison to Terrestrial Soils

Citation:

SINSABAUGH, R. L., J. J. FOLLSTAD SHAH, B. H. HILL, AND C. M. ELONEN. Ecoenzymatic Stoichiometry of Stream Sediments with Comparison to Terrestrial Soils . Biochemistry. Consultants Bureau, 111(1-3):455-467, (2012).

Description:

In this study, we extend the development of ecoenzymatic stoichiometry to the surface sediments of stream ecosystems using data collected in a nationwide survey. The data set is larger and more comprehensive than those used in our previous studies. The data include the first broad survey of phenol oxidase, peroxidase and sulfatase activities in freshwater ecosystems. In addition, the measurement of multiple glycosidases and aminopeptidases provides greater resolution of the contributions of various monosaccharides and amino acids to microbial metabolism. By comparing these results to those for terrestrial soils, we conclude that ecoenzymatic stoichiometry reflects broad biogeochemical equilibria between organic matter composition, nutrient availability and microbial metabolism.

Purpose/Objective:

In this study, we extend the development of ecoenzymatic stoichiometry to the surface sediments of stream ecosystems using data collected in a nationwide survey. The data set is larger and more comprehensive than those used in our previous studies. The data include the first broad survey of phenol oxidase, peroxidase and sulfatase activities in freshwater ecosystems. In addition, the measurement of multiple glycosidases and aminopeptidases provides greater resolution of the contributions of various monosaccharides and amino acids to microbial metabolism. By comparing these results to those for terrestrial soils, we conclude that ecoenzymatic stoichiometry reflects broad biogeochemical equilibria between organic matter composition, nutrient availability and microbial metabolism.

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 11/01/2012
Completion Date: 11/01/2012
Record Last Revised: 02/05/2013
Record Created: 03/11/2011
Record Released: 03/11/2011
OMB Category: Other
Record ID: 233884

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

MID-CONTINENT ECOLOGY DIVISION

WATERSHED DIAGNOSTICS RESEARCH