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Influence of LAS on marine calanoid copepod population dynamics and potential reproduction.
Aquat Toxicol. 2003 May 29; 63(4):405-16.AT

Abstract

The toxicity of linear alkyl benzene sulfonate (LAS) to marine invertebrates is well documented under laboratory conditions using single-species tests. It is less known how LAS affects natural populations of aquatic organisms. We hypothesised that LAS was more toxic to the calanoid copepod Acartia sp. under natural conditions than Acartia tonsa under cultured conditions in the laboratory. This hypothesis was checked by a direct comparison of LAS toxicity in single-species and model (mesocosm) studies. The acute and sublethal effects of LAS on the survival and egg production of laboratory reared A. tonsa were examined by standard test, i.e. incubation with LAS without food for 24-72 h. The LC(50) and EC(50) values averaged 1.23 and 0.74 mg l(-1) for survival and egg production, respectively. These values are comparable to previous reports. The effects of LAS on a natural copepod community were also investigated under in situ conditions. A series of seven mesocosms (holding approx. 3 m(3) of seawater each) was established with two mesocosms being controls without LAS and five mesocosms with increasing concentrations of LAS ranging from 0.1 to 6.5 mg l(-1) applied as a single dose. The indigenous copepod community, dominated by Acartia sp. and Centropages sp., responded clearly to LAS concentrations above 0.1 mg l(-1). The calculated no effect value was 0.14 mg LAS l(-1) (95% CI=0.08-1.82 mg LAS l(-1)) for the entire copepod community including all development stages after 24 h exposure. The increased sensitivity under in situ conditions was probably promoted by the suboptimal growth conditions, e.g. no saturated food concentration or inadequate nutritive values of the food. The amount of food expressed as chlorophyll concentration was low (around 2 microg chl. a l(-1)) but was not affected by LAS. It appeared that the naupliar stages of Acartia and Centropages were the least affected by LAS and that new cohorts were able to develop 15 days after the dosing with LAS.

Authors+Show Affiliations

Freshwater Biological Laboratory, University of Copenhagen, Helsingørsgade 51, Hillerød 3400, Denmark. kchristoffersen@zi.ku.dkNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12758005

Citation

Christoffersen, Kirsten, et al. "Influence of LAS On Marine Calanoid Copepod Population Dynamics and Potential Reproduction." Aquatic Toxicology (Amsterdam, Netherlands), vol. 63, no. 4, 2003, pp. 405-16.
Christoffersen K, Hansen BW, Johansson LS, et al. Influence of LAS on marine calanoid copepod population dynamics and potential reproduction. Aquat Toxicol. 2003;63(4):405-16.
Christoffersen, K., Hansen, B. W., Johansson, L. S., & Krog, E. (2003). Influence of LAS on marine calanoid copepod population dynamics and potential reproduction. Aquatic Toxicology (Amsterdam, Netherlands), 63(4), 405-16.
Christoffersen K, et al. Influence of LAS On Marine Calanoid Copepod Population Dynamics and Potential Reproduction. Aquat Toxicol. 2003 May 29;63(4):405-16. PubMed PMID: 12758005.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of LAS on marine calanoid copepod population dynamics and potential reproduction. AU - Christoffersen,Kirsten, AU - Hansen,Benni W, AU - Johansson,Liselotte S, AU - Krog,Elisabeth, PY - 2003/5/22/pubmed PY - 2003/8/21/medline PY - 2003/5/22/entrez SP - 405 EP - 16 JF - Aquatic toxicology (Amsterdam, Netherlands) JO - Aquat. Toxicol. VL - 63 IS - 4 N2 - The toxicity of linear alkyl benzene sulfonate (LAS) to marine invertebrates is well documented under laboratory conditions using single-species tests. It is less known how LAS affects natural populations of aquatic organisms. We hypothesised that LAS was more toxic to the calanoid copepod Acartia sp. under natural conditions than Acartia tonsa under cultured conditions in the laboratory. This hypothesis was checked by a direct comparison of LAS toxicity in single-species and model (mesocosm) studies. The acute and sublethal effects of LAS on the survival and egg production of laboratory reared A. tonsa were examined by standard test, i.e. incubation with LAS without food for 24-72 h. The LC(50) and EC(50) values averaged 1.23 and 0.74 mg l(-1) for survival and egg production, respectively. These values are comparable to previous reports. The effects of LAS on a natural copepod community were also investigated under in situ conditions. A series of seven mesocosms (holding approx. 3 m(3) of seawater each) was established with two mesocosms being controls without LAS and five mesocosms with increasing concentrations of LAS ranging from 0.1 to 6.5 mg l(-1) applied as a single dose. The indigenous copepod community, dominated by Acartia sp. and Centropages sp., responded clearly to LAS concentrations above 0.1 mg l(-1). The calculated no effect value was 0.14 mg LAS l(-1) (95% CI=0.08-1.82 mg LAS l(-1)) for the entire copepod community including all development stages after 24 h exposure. The increased sensitivity under in situ conditions was probably promoted by the suboptimal growth conditions, e.g. no saturated food concentration or inadequate nutritive values of the food. The amount of food expressed as chlorophyll concentration was low (around 2 microg chl. a l(-1)) but was not affected by LAS. It appeared that the naupliar stages of Acartia and Centropages were the least affected by LAS and that new cohorts were able to develop 15 days after the dosing with LAS. SN - 0166-445X UR - https://www.unboundmedicine.com/medline/citation/12758005/Influence_of_LAS_on_marine_calanoid_copepod_population_dynamics_and_potential_reproduction_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0166445X0200200X DB - PRIME DP - Unbound Medicine ER -