Document Detail


Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. I. Study design and planktonic community responses.
MedLine Citation:
PMID:  17571694     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The influence of relative isolation on the ecological recovery of freshwater outdoor mesocosm communities after an acute toxic stress was assessed in a 14-month-long study. A single concentration of deltamethrin was applied to 8 out of 16 outdoor 9-m3 mesocosms to create a rapid decrease of the abundance of arthropods. To discriminate between external and internal recovery mechanisms, four treated and four untreated (control) mesocosms were covered with 1-mm mesh screen lids. The dynamics of planktonic communities were monitored in the four types of ponds. The abundance of many phytoplankton taxa increased after deltamethrin addition, but the magnitude of most increases was relatively small, probably due to low nutrient availability and the survival of rotifers. The greatest impact on zooplankton was seen in Daphniidae and, to a lesser extent, calanoid copepods. Recovery (defined as when statistical analysis failed to detect a difference in the abundance between the deltamethrin-treated ponds and corresponding control ponds for two consecutive sampling dates) of Daphniidae was observed in the water column 105 and 77 d after deltamethrin addition in open and covered mesocosms, respectively, and <42 d for both open and covered ponds at the surface of the sediments. Rotifers did not proliferate, probably because of the survival of predators (e.g., cyclopoid copepods). These results confirm that the recovery of planktonic communities after exposure to a strong temporary chemical stress mostly depends upon internal mechanisms (except for larvae of the insect Chaoborus sp.) and that recovery dynamics are controlled by biotic factors, such as the presence of dormant forms and selective survival of predators.
Authors:
Mark L Hanson; David W Graham; Emmanuelle Babin; Didier Azam; Marie-Agnes Coutellec; Charles W Knapp; Laurent Lagadic; Thierry Caquet
Related Documents :
11156284 - Active recovery reduces the decrease in circulating white blood cells after exercise.
8109374 - Taking the first steps in contraction mechanics of single myocytes from frog heart.
4080614 - Response of plasma proenkephalin peptide f to exercise.
20048554 - Does the coingestion of carbohydrate and amino acids improve recovery from endurance ex...
3349754 - Effects of propranolol and verapamil on plasma ionized calcium and parathyroid hormone ...
3404074 - The aerobic cost of saltatory locomotion in the fowler's toad (bufo woodhousei fowleri).
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  26     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-18     Completed Date:  2007-07-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1265-79     Citation Subset:  IM    
Affiliation:
UMR985 INRA-Agrocampus Ecobiologie et Qualité des Hydrosystèmes Continentaux, Equipe Ecotoxicologie et Qualité des Milieux Aquatiques, 65 Rue de Saint-Brieuc, F35042 Rennes, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Fresh Water
Insecticides / toxicity*
Nitriles / toxicity*
Plankton / drug effects*
Pyrethrins / toxicity*
Water Pollutants, Chemical / toxicity*
Chemical
Reg. No./Substance:
0/Insecticides; 0/Nitriles; 0/Pyrethrins; 0/Water Pollutants, Chemical; 52820-00-5/decamethrin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Comparison of the uptake of polycyclic aromatic hydrocarbons and organochlorine pesticides by semipe...
Next Document:  Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. II....