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Titolo:
Uptake of estrone from the water column by a coral community
Autore:
Tarrant, AM; Atkinson, MJ; Atkinson, S;
Indirizzi:
Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA Univ Hawaii ManoaHonolulu HI USA 96822 t Oceanog, Honolulu, HI 96822 USA Univ Hawaii Manoa, Hawaii Inst Marine Biol, Kaneohe, HI 96744 USA Univ Hawaii Manoa Kaneohe HI USA 96744 Marine Biol, Kaneohe, HI 96744 USA
Titolo Testata:
MARINE BIOLOGY
fascicolo: 2, volume: 139, anno: 2001,
pagine: 321 - 325
SICI:
0025-3162(200108)139:2<321:UOEFTW>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCLERACTINIAN CORAL; MASS-TRANSFER; FAVIA-FRAGUM; METABOLISM; ESTRADIOL-17-BETA; TISSUES; FATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Tarrant, AM Univ Hawaii Manoa, Dept Oceanog, 1000 Pope Rd, Honolulu, HI 96822 USA Univ Hawaii Manoa 1000 Pope Rd Honolulu HI USA 96822 96822 USA
Citazione:
A.M. Tarrant et al., "Uptake of estrone from the water column by a coral community", MARINE BIOL, 139(2), 2001, pp. 321-325

Abstract

Estrogens and other steroids are present in coral tissues and are hypothesized to regulate reproductive processes. It is not known whether corals synthesize estrogens, accumulate them from dietary sources, or concentrate them from overlying seawater. To determine whether corals can remove estrogensfrom the water column. we conducted a series of experiments in a 24-m flume filled with 2 m(2) of scleractinian corals. In each experiment, the flumewas spiked with estrone (initial concentrations 1.000 2,500 pg l(-1)), water was recirculated, and water samples were collected intermittently for 1-7 days. Corals removed estrone from the water column at a rate proportionalto concentration [rate = S(estrone)]; the estimated first-order rate constant (S) was 85x10(-6) m s(-1) (95% confidence limit +/- 24x10(-6) m s(-1)). The reported rate constants are close to maximal uptake rates, based on mass transfer theory of nutrient uptake by corals. Incubations of coral tissue with tritiated estrone corroborated flume experiments and demonstrated that estrone was removed from the water column by live corals about twice as fast as estrone was adsorbed to the surface of dead coral. Given that concentrations of dissolved estrone are 50-1.000 pg l(-1) over coral reefs, uptake rates of estrogen into coral communities from the water column are in the range of 0.37-7.3x10(6) pgestrone m(-2) day(-1) with estimated turnover times of 6-115 days. We conclude that estrogens can be removed from the water column by corals and can accumulate in coral tissue.

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Documento generato il 04/06/20 alle ore 19:51:58