Format

Send to

Choose Destination
See comment in PubMed Commons below
Math Biosci. 2013 Aug;244(2):107-15. doi: 10.1016/j.mbs.2013.04.011. Epub 2013 May 16.

A stoichiometric producer-grazer model incorporating the effects of excess food-nutrient content on consumer dynamics.

Author information

  • 1School of Mathematical and Statistical Science, Arizona State University, Tempe, AZ 85287-1804, USA. angela.peace@asu.edu

Abstract

There has been important progress in understanding ecological dynamics through the development of the theory of ecological stoichiometry. For example, modeling under this framework allows food quality to affect consumer dynamics. While the effects of nutrient deficiency on consumer growth are well understood, recent discoveries in ecological stoichiometry suggest that consumer dynamics are not only affected by insufficient food nutrient content (low phosphorus (P): carbon (C) ratio) but also by excess food nutrient content (high P:C). This phenomenon is known as the stoichiometric knife edge, in which animal growth is reduced not only by food with low P content but also by food with high P content, and needs to be incorporated into mathematical models. Here we present a Lotka-Volterra type model to investigate the growth response of Daphnia to algae of varying P:C ratios capturing the mechanism of the stoichiometric knife edge.

KEYWORDS:

Daphnia; Ecological stoichiometry; Lotka–Volterra; Stoichiometric knife edge

PMID:
23684950
DOI:
10.1016/j.mbs.2013.04.011
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center