Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

 
Main Menu

· Home
· Contacts
· Data Systems
· Documents
· FAQ
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference

 

Register of Resources (RoR)

 People  |  Datasets  |  Literature  |  Institutes  |  Projects 

[ report an error in this record ]basket (0): add | show Print this page

Modeling toxic stress by atrazine in a marine consumer-resource system
de Hoop, L.; De Troch, M.; Hendriks, A.J.; De Laender, F. (2013). Modeling toxic stress by atrazine in a marine consumer-resource system. Environ. Toxicol. Chem. 32(5): 1088-1095. http://dx.doi.org/10.1002/etc.2160
In: Environmental Toxicology and Chemistry. Setac Press: New York. ISSN 0730-7268; e-ISSN 1552-8618
Peer reviewed article  

Available in  Authors 

Keywords
    Dimensions > Capacity > Carrying capacity
    Food webs
    Marine/Coastal
Author keywords
    Intrinsic rate of increase; Rosenzweig-MacArthur model; Consumer resource

Authors  Top 
  • de Hoop, L.
  • De Troch, M., more
  • Hendriks, A.J.
  • De Laender, F.

Abstract
    The present study combines short-term experiments with food chain modeling to explore the long-term effects of the herbicide atrazine on consumer-resource dynamics in a marine intertidal ecosystem. Short-term (28 d) lab experiments indicated that the intrinsic rate of increase (r) and carrying capacity (K) of the marine diatom Seminavis robusta decreased with increasing atrazine exposure. This decrease did not show the concave shape expected from the lifetime productivity for nonexposed diatoms and from single-species toxicity data in the literature but instead was described best by a linear model. These experimentally observed atrazine-induced decreases of r and K were used to parameterize a Rosenzweig-MacArthur model representing a simple food chain including the tested diatom and its grazer, the harpacticoid copepod Delavalia palustris var. palustris. Stable oscillation zoo-phytobenthos systems were produced at diatom exposures of 0, 100, and 150?µg/L atrazine. An atrazine concentration of 150?µg/L contributed to a 15% increase of the oscillation periods of both diatoms and copepods as well as a 52% reduction of oscillation amplitudes compared with the control situation. Although the amplitudes of copepods increased only 7% at 150?µg/L atrazine, the maximum and minimum copepod densities at that concentration were reduced 61 and 63%, respectively. The effects of atrazine on periodicity and amplitudes were robust to 20% changes in the food-chain model parameters that represented allometric relationships. The simulations in the present study suggest food chain–mediated indirect effects on zoobenthos populations, indicating a reduced diatom and copepod availability throughout the year.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors 


If any information here appears to be incorrect, please contact us
Back to Register of Resources
 
Quick links

MarBEF WIKI

Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)
Outreach

Science
Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca

WoRMS
part of WoRMS logo

ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin

EurOBIS

Geographic System

Datasets

 


Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact data-at-marbef.org