Водная экология, секция гидробиологии МОИП, гидроэкология, лимнология, биологическая океанография, экотоксикология / aquatic ecology, limnology, biological oceanography, ecotoxicology » Обсуждения

доктор биологических наук

Bookmark and Share

Article. Biocatalysis of Matter Transfer in a Microcosm Is Inhibited by a Contaminant: Effects of a Surfactant

янв 25, 2015 | 18:01


S. A. Ostroumov and M. P. Kolesnikov.
Biocatalysis of Matter Transfer in a Microcosm Is Inhibited by a Contaminant: Effects of a Surfactant.
Doklady Biological Sciences, 2000; 373:397-399.

ABSTRACT: https://www.researchgate.net/publication/271325576_Biocatalysis;
Biocatalysis of Matter Transfer in a Microcosm Is Inhibited by a Contaminant Effects of a Surfactant.
Short description of the content of this article:
Biologically-driven transfer of organic matter and chemical elements through a model aquatic ecosystem (a microcosm) was found to be inhibited by a chemical pollutant / contaminant: effects of a surfactant on aquatic mollusk, the pond snail ( Lymnaea stagnalis). In the title of this article the Latin name of this mollusk (pond snail) is mentioned; in this title it is spelled as Limnea stagnalis; however, a more correct spelling is Lymnaea stagnalis.

Adetailed comment on this article is published online:
5bio5.blogspot.com/2012/07/biocatalysis-of-matter-transfer-in.html ;

Superconcise summary:
A new discovery: 
a new type of environmental hazards from chemical pollutants (contaminants) as exemplified by surfactants and detergents was discovered in this article. Those chemicals inhibited the transfer of chemical elements which were in the pellets produced and excreted by the freshwater mollusks, namely, pond snails (Lymnaea stagnalis) . 

This discovery is Important as it is a substantial addition to what is known on chemical element transfer/movements in the environment. These facts are of serious interest to biogeochemistry.
S. A. Ostroumov and M. P. Kolesnikov. Biocatalysis of Matter Transfer in a Microcosm Is Inhibited by a Contaminant: Effects of a Surfactant on Limnea stagnalis. — Doklady Biological Sciences, Vol. 373, 2000, pp. 397–399..


Ostroumov S.A., Kolesnikov M.P.

Biocatalysis of matter transfer in a microcosm is inhibited by a contaminant: effects of a surfactant on Lymnaea stagnalis. — Doklady Biological Sciences. 2000. 373: 397-399.

key words:

microcosm, inhibited, pollutant, surfactant, detergent, feeding, rate, trophic, activity, pellets, excretion, aquatic, mollusc, Lymnaea stagnalis, Limnea, 

Full text is available online free, on this page and also here:
www.citeulike.org/user/ATP/article/9751191; PMID: 11013843 [PubMed]; 
More detailed ABSTRACT:
By excreting some massive amount of organic matter in the form of pellets, the gastropod mollusks drive the transfer of organic matter and contribute to the biogeochemical flows of chemical elements in aquatic ecosystems. For the first time, the quantitative assessment of the biogeochemical flows was made. Also, for the first time, it was discovered that a synthetic chemical may inhibit those flows. 

The pellet excretion by the gastropods Lymnaea stagnalis feeding on the phytomass of macrophytes (such as Nuphar lutea) was 4–7 mg dry weight per 1 gram wet weight of the mollusks per 72 h. Pellet sedimentation contributes to the vertical transfer of chemical elements in the ecosystem. The pellet composition depended on the species of the plants eaten by the mollusks. When the gastropods L. stagnalis feed on N. lutea, the pellets contain, in addition to organic and inorganic carbon, nitrogen (N, 2.3–2.9%), phosphorus (P, 0.4–0.5%), and silicium (silicon) (Si, 1.1–1.9%). The relative content of Si was 30% higher than in the food phytomass. The synthetic surfactant tetradecyltrimethylammonium bromide (TDTMA, 2 mg/L) inhibited the feeding rate of the mollusks and pellet production, their accumulation at the bottom of microcosms, and the matter transfer connected with this. The data obtained demonstrated a new aspect of the ecological hazard due to environmental pollution with TDTMA and other quaternary ammonium compounds at sublethal concentrations. According to the author’s opinion, other contaminants may also suppress pellet production, their accumulation at the bottom, and the matter transfer associated with that. scipeople.ru/users/2943391/;
Why TDTMA? This synthetic surfactant was used by the author in his previous research projects with other species of Mollusca. The author had discovered its negative effects on feedeing rate of bivalve mollusks. On this basis, he continued using this chemical substance when he started a new project with the pond snails.

Why this species, Lymnaea stagnalis? This species was taken for studies in this project because it is one of most common species of freshwater invertebrates. The biomass of this species per 1 square meter of the freshwater ecosystem (and the mass of their pellets) reaches significant numbers. Therefore their role in transfer of organic matter and chemical elements in the form ofexcreted pellets is very substantial.

Why the leaves of Taraxacum were used in experiments? This is just a common practice among the researchers who work with the pond snails in laboratories to use the leaves of this plant species as food for these mollusks. 


This paper was published in the journal which is often underestimated. The real impact of this journal is significant as it is being published in two languages: in English and in Russian.
The English edition of the journal (Doklady Biological Sciences ) with this paper is available in many university libraries in the U.S., U.K., Germany, Netherlands, Spain, Australia and other countries. The unusual word 'Doklady' in the title is just a transliteration of the Russian word 'Доклады ' which means 'Proceedings' (Proceeding of the Russian Academy of Sciences).
The reference of the Russian edition is:
Остроумов С.А., Колесников М.П.
Биокатализ переноса вещества в микрокосме ингибируется контаминантом: воздействие ПАВ на Lymnaea stagnalis // ДАН 2000. Т. 373. № 2. С.278-280.

Mentioned online, e.g.:
PMID: 11013843 [PubMed — indexed for MEDLINE];

  • Lymnaea stagnalis ×

Нет комментариев  

Вам необходимо зайти или зарегистрироваться для комментирования