thumbnail

Shifts in lake N: P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition

Science

By:
, , , , , , , ,
DOI: 10.1126/science.1176199

Links

Abstract

Human activities have more than doubled the amount of nitrogen (N) circulating in the biosphere. One major pathway of this anthropogenic N input into ecosystems has been increased regional deposition from the atmosphere. Here we show that atmospheric N deposition increased the stoichiometric ratio of N and phosphorus (P) in lakes in Norway, Sweden, and Colorado, United States, and, as a result, patterns of ecological nutrient limitation were shifted. Under low N deposition, phytoplankton growth is generally N-limited; however, in high-N deposition lakes, phytoplankton growth is consistently P-limited. Continued anthropogenic amplification of the global N cycle will further alter ecological processes, such as biogeochemical cycling, trophic dynamics, and biological diversity, in the world's lakes, even in lakes far from direct human disturbance.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Shifts in lake N: P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition
Series title:
Science
DOI:
10.1126/science.1176199
Volume
326
Issue:
5954
Year Published:
2009
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
835
Last page:
837
Number of Pages:
3