TY - JOUR
T1 - Effect of excess food nutrient on producer-grazer model under stoichiometric and toxicological constraints
AU - Hassan, Md Nazmul
AU - Thompson, Kelsey
AU - Mayer, Gregory
AU - Peace, Angela
N1 - Funding Information:
This material is based upon work supported by the NSF under Grant No 1615697
Publisher Copyright:
© 2019 Laser and Optoelectronics Progress.All rights reserved.
PY - 2019
Y1 - 2019
N2 - Accurately assessing the risks of contaminants requires more than an understanding of the effects of contaminants on individual organism, but requires further understanding of complex ecological interactions, elemental cycling, and the interactive effects of natural stressors, such as resource limitations, and contaminant stressors. There is increasing evidence that organisms experience interactive effects of contaminant stressors and food conditions, such as resource stoichiometry, availability and excess of nutrient. Here, we develop and analyze the first producer-grazer population model that incorporates the effects of excess nutrients, as well as nutrient limitations on grazer exposed to toxicants. We use analytical, numerical and bifurcation analysis to reduce and explore model parameterized for an aquatic system of algae and zooplankton exposed to methylmercury under varying phosphorus conditions. Under certain environmental conditions, our models predict higher toxicity than previous models that neglect the consequences excess nutrient conditions can have on grazer populations.
AB - Accurately assessing the risks of contaminants requires more than an understanding of the effects of contaminants on individual organism, but requires further understanding of complex ecological interactions, elemental cycling, and the interactive effects of natural stressors, such as resource limitations, and contaminant stressors. There is increasing evidence that organisms experience interactive effects of contaminant stressors and food conditions, such as resource stoichiometry, availability and excess of nutrient. Here, we develop and analyze the first producer-grazer population model that incorporates the effects of excess nutrients, as well as nutrient limitations on grazer exposed to toxicants. We use analytical, numerical and bifurcation analysis to reduce and explore model parameterized for an aquatic system of algae and zooplankton exposed to methylmercury under varying phosphorus conditions. Under certain environmental conditions, our models predict higher toxicity than previous models that neglect the consequences excess nutrient conditions can have on grazer populations.
KW - ecological stoichiometry
KW - ecotoxicology
KW - stoichiometric knife edge
UR - http://www.scopus.com/inward/record.url?scp=85058822816&partnerID=8YFLogxK
U2 - 10.3934/mbe.2019008
DO - 10.3934/mbe.2019008
M3 - Article
C2 - 30674114
AN - SCOPUS:85058822816
VL - 16
SP - 150
EP - 167
JO - Mathematical Biosciences and Engineering
JF - Mathematical Biosciences and Engineering
SN - 1547-1063
IS - 1
ER -