EPA Science Inventory

Monitoring the Productivity of Coastal Systems Using PH: When Simpler is Better

Citation:

Oczkowski, A., C. Oviatt, AND S. Nixon. Monitoring the Productivity of Coastal Systems Using PH: When Simpler is Better. Presented at 6th International Nitrogen Conference (N2013), Kampala, UGANDA, November 18 - 22, 2013.

Description:

The impact of nutrient inputs to the eutrophication of coastal ecosystems has been one of the great themes of coastal ecology. There have been countless studies devoted to quantifying how human sources of nutrients, in particular nitrogen (N), effect coastal water bodies. These studies, which often measure in situ concentrations of nutrients, chlorophyll, and dissolved oxygen, are often spatially and/or temporally intensive and expensive. We provide evidence from experimental mesocosms, coupled with data from the water column of a well-mixed estuary, that pH can be a quick, inexpensive, and integrative measure of net ecosystem metabolism. In some cases, this approach is a more sensitive tracer of production than direct measurements of chlorophyll and carbon-14. Taken together, our data suggest that pH is a sensitive, but often overlooked, tool for monitoring estuarine production.

Purpose/Objective:

This presentation will explore the potential utility of pH as an indicator of ecosystem productivity. Our data suggest that pH is a sensitive and potentially integrator of net ecosystem production. It should not be overlooked, that measuring pH is quick, easy, and inexpensive, further increasing its value as an analytical tool.

URLs/Downloads:

AO_ABSTRACT_N2013.PDF   (PDF,NA pp, 29.322 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PRESENTATION/ABSTRACT)
Completion Date: 01/28/2014
Record Last Revised: 01/28/2014
Record Created: 01/28/2014
Record Released: 01/28/2014
OMB Category: Other
Record ID: 267581

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

ATLANTIC ECOLOGY DIVISION

WATERSHED DIAGNOSTICS BRANCH