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Titolo:
Failed recruitment of southern toads (Bufo terrestris) in a trace element-contaminated breeding habitat: Direct and indirect effects that may lead toa local population sink
Autore:
Rowe, CL; Hopkins, WA; Coffman, VR;
Indirizzi:
Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA Univ Georgia Aiken SC USA 29802 annah River Ecol Lab, Aiken, SC 29802 USA
Titolo Testata:
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
fascicolo: 3, volume: 40, anno: 2001,
pagine: 399 - 405
SICI:
0090-4341(200104)40:3<399:FROST(>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
COAL COMBUSTION WASTE; STANDARD METABOLIC-RATE; ORAL DEFORMITIES; RANA; SELENIUM; TADPOLES; PLANT; FISH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Rowe, CL Univ Maryland, Chesapeake Biol Lab, Ctr Environm Sci, POB 38, Solomons, MD20688 USA Univ Maryland POB 38 Solomons MD USA 20688 Solomons, MD20688 USA
Citazione:
C.L. Rowe et al., "Failed recruitment of southern toads (Bufo terrestris) in a trace element-contaminated breeding habitat: Direct and indirect effects that may lead toa local population sink", ARCH ENV C, 40(3), 2001, pp. 399-405

Abstract

We conducted a transplant study in which embryonic southern toads (Bufo terrestris) were held in a site polluted with coal ash (site AB; containing As, Cd, Cr, Cu, Se, and other elements) and a reference site (site R) through hatching and early larval development. To examine the remainder of the larval period, surviving larvae in AB were then transplanted to R and back-transplanted to AB, whereas surviving larvae from R were back-transplanted toR. Survival through early larval development was lower in AB than in R (34% versus 50%). However, site of hatching did not influence traits later in development (larval metabolic rate, larval morphology, duration of larval period, size at metamorphosis, or average hopping distance by metamorphs). Toads that spent the entire larval period in R had high rates of survival (70-94% of individuals transplanted after the embryonic period) regardless ofwhere they spent the embryonic acid early larval period. However, toads held in AB for the duration of the larval period suffered 100% mortality. Algal resources were scarce and their trace element concentrations high in AB compared to R, suggesting that mortality of larval toads resulted from a combination of direct toxicity (via sediment- and foodborne exposure) and indirect effects on resource abundance. The study suggests that the widespreadpractice of disposing of coal ash in open aquatic basins may result in sink habitats for some amphibian populations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 04:05:37