Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. I. Study design and planktonic community responses

Mark L. Hanson, David W. Graham, Emmanuelle Babin, Didier Azam, Marie-Agnes Coutellec, Charles W. Knapp, Laurent Lagadic, Thierry Caquet

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)1265-1279
Number of pages14
JournalEnvironmental Toxicology and Chemistry
Volume26
Issue number6
Publication statusPublished - Jun 2007

Fingerprint

community response
Ponds
Insecticides
deltamethrin
insecticide
pond
Copepoda
Recovery
predator
Zooplankton
Phytoplankton
Arthropods
biotic factor
Poisons
mesocosm
Fresh Water
nutrient availability
arthropod
Nutrients
Larva

Keywords

  • ecological recovery
  • connectivity
  • aquatic mesocosms
  • higher-tier risk
  • assessment
  • deltamethrin

Cite this

Hanson, Mark L. ; Graham, David W. ; Babin, Emmanuelle ; Azam, Didier ; Coutellec, Marie-Agnes ; Knapp, Charles W. ; Lagadic, Laurent ; Caquet, Thierry. / Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. I. Study design and planktonic community responses. In: Environmental Toxicology and Chemistry. 2007 ; Vol. 26, No. 6. pp. 1265-1279.
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Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. I. Study design and planktonic community responses. / Hanson, Mark L.; Graham, David W.; Babin, Emmanuelle; Azam, Didier; Coutellec, Marie-Agnes; Knapp, Charles W.; Lagadic, Laurent; Caquet, Thierry.

In: Environmental Toxicology and Chemistry, Vol. 26, No. 6, 06.2007, p. 1265-1279.

Research output: Contribution to journalArticle

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T1 - Influence of isolation on the recovery of pond mesocosms from the application of an insecticide. I. Study design and planktonic community responses

AU - Hanson, Mark L.

AU - Graham, David W.

AU - Babin, Emmanuelle

AU - Azam, Didier

AU - Coutellec, Marie-Agnes

AU - Knapp, Charles W.

AU - Lagadic, Laurent

AU - Caquet, Thierry

PY - 2007/6

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N2 - 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.

AB - 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.

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KW - connectivity

KW - aquatic mesocosms

KW - higher-tier risk

KW - assessment

KW - deltamethrin

UR - http://www.ceg.ncl.ac.uk/ecoserv/assets/pdf/hanson07.pdf

M3 - Article

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EP - 1279

JO - Environmental Toxicology and Chemistry

JF - Environmental Toxicology and Chemistry

SN - 0730-7268

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