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Titolo:
Interactions of an insecticide with larval density and predation in experimental amphibian communities
Autore:
Boone, MD; Semlitsch, RD;
Indirizzi:
Univ Missouri, Div Biol Sci, Columbia, MO 65211 USA Univ Missouri Columbia MO USA 65211 Div Biol Sci, Columbia, MO 65211 USA
Titolo Testata:
CONSERVATION BIOLOGY
fascicolo: 1, volume: 15, anno: 2001,
pagine: 228 - 238
SICI:
0888-8892(200102)15:1<228:IOAIWL>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBARYL; POND; SURVIVAL; IMPACTS; METAMORPHOSIS; PERSPECTIVE; POPULATIONS; MESOCOSMS; AMBYSTOMA; TADPOLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Boone, MD Univ Missouri, Div Biol Sci, 105 Tucker Hall, Columbia, MO 65211USA Univ Missouri 105 Tucker Hall Columbia MO USA 65211 MO 65211 USA
Citazione:
M.D. Boone e R.D. Semlitsch, "Interactions of an insecticide with larval density and predation in experimental amphibian communities", CONSER BIOL, 15(1), 2001, pp. 228-238

Abstract

This study examines the effects of the short-lived insecticide carbaryl, aneurotoxin, on amphibian communities experiencing natural stresses of competition and predation. Tadpoles of three species (Wood-house's toad /Bufo woodhousii/, gray treefrog [Hyla versicolor], and green frog [Rana clamitans]), representing a commonly encountered assemblage in Missouri, were rearedin outdoor polyethylene pond mesocosms. We determined the effects of initial tadpole density (low or high), Predation (newts [Notophthalmus viridescens] absent or present), chemical exposure (0, 3.5, or 7.0 mg/L carbaryl) and their interactions on body mass, larval period, and survival to metamorphosis. Green frogs in high-density ponds did not reach metamorphosis, but metamorphs in but-density ponds and tadpoles in high-density ponds were not significantly affected by treatments or their interaction. Carbaryl reduced survival to metamorphosis in toads and treefrogs and increased mass at metamorphosis in treefrogs. Effects of carbaryl varied with predator environment and initial larval density. Interactions of carbaryl with predator and with density may result in an indirect effect of carbaryl causing increased food resources through the elimination of zooplankton populations that may compete for similar resources. Our results indicate that differences in biotic conditions influenced the potency of carbaryl and that even but concentrations induce changes that may alter community dynamics in ways not predicted from single-factor, laboratory-based studies.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 16:50:17