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Titolo:
The distribution, abundance and seasonality of pelagic marine invertebratelarvae in the maritime Antarctic
Autore:
Stanwell-Smith, D; Peck, LS; Clarke, A; Murray, AWA; Todd, CD;
Indirizzi:
British Antarctic Survey, Cambridge CB3 0ET, England British Antarctic Survey Cambridge England CB3 0ET idge CB3 0ET, England Univ St Andrews, Gatty Marine Lab, St Andrews KY16 8LB, Fife, Scotland Univ St Andrews St Andrews Fife Scotland KY16 8LB Y16 8LB, Fife, Scotland
Titolo Testata:
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1382, volume: 354, anno: 1999,
pagine: 471 - 484
SICI:
0962-8436(19990228)354:1382<471:TDAASO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBLITTORAL EPIFAUNAL COMMUNITIES; ICE-FOOT ZONE; BENTHIC INVERTEBRATES; SIGNY ISLAND; MCMURDO SOUND; SEA-ICE; ECOLOGY; LIFE; HISTORY; FERTILIZATION;
Keywords:
larva; Antarctic; diversity; abundance; seasonality; marine invertebrate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
77
Recensione:
Indirizzi per estratti:
Indirizzo: Peck, LS British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, England British Antarctic Survey Madingley Rd Cambridge England CB3 0ET
Citazione:
D. Stanwell-Smith et al., "The distribution, abundance and seasonality of pelagic marine invertebratelarvae in the maritime Antarctic", PHI T ROY B, 354(1382), 1999, pp. 471-484

Abstract

survey of pelagic larvae was undertaken between November 1992 and February1995 at Signy Island, Antarctica (60 degrees 43' S, 45 degrees 36' W). A diver-towed net and hand-held plankton pump were used at five sites of varying depths (6-30 m) and benthic substrata, in a combination of monthly and fortnightly samples. Overall larval ecological diversity was much higher than expected, with 131 morphologically distinct larval forms collected, apparently representing most of the benthic phyla present. The species richness observed is comparable with levels recorded at temperate latitudes, and higher than Arctic data and the implications for Thorson's rule (the inferred dine of reduced pelagic larval diversity towards high latitudes) is discussed. Larval abundances were low (mean 2.6 individuals per m(3)), which were two to six orders of magnitude lower than peaks in comparable data from temperate and tropical zones. We suggest that the low abundances recorded are a reflection of both slow developmental rates and a high dilution of larvae, reducing synchrony and spreading larvae over larger distances. Three seasonal periods, during which different larval types occur, have been identified. Summer, late summer and winter spawning strategies were discernible, and in some groups larvae occurred throughout the year.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 18:02:58