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Titolo:
SUBTROPICAL CORAL-REEF ASSOCIATED SEDIMENTARY FACIES CHARACTERIZED BYMOLLUSKS (NORTHERN BAY OF SAFAGA, RED-SEA, EGYPT)
Autore:
ZUSCHIN M; HOHENEGGER J;
Indirizzi:
INST PALEONTOL,GEOZENTRUM,ALTHANSTR 14 A-1090 VIENNA AUSTRIA
Titolo Testata:
Facies
, volume: 38, anno: 1998,
pagine: 229 - 254
SICI:
0172-9179(1998)38:<229:SCASFC>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIZE-FREQUENCY DISTRIBUTION; DEATH ASSEMBLAGES; FOSSIL RECORD; DISTRIBUTION PATTERNS; INDIAN-OCEAN; ENERGY-FLOW; TEXAS BAYS; SHELL BEDS; TIME; PRESERVATION;
Keywords:
MICROMOLLUSCS; ASSEMBLAGES; DIVERSITY; FEEDING STRATEGIES; SUBSTRATE RELATIONS; TAPHONOMY; PALEOECOLOGY; RECENT;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
125
Recensione:
Indirizzi per estratti:
Citazione:
M. Zuschin e J. Hohenegger, "SUBTROPICAL CORAL-REEF ASSOCIATED SEDIMENTARY FACIES CHARACTERIZED BYMOLLUSKS (NORTHERN BAY OF SAFAGA, RED-SEA, EGYPT)", Facies, 38, 1998, pp. 229-254

Abstract

The shallow marine subtropical Northern Bay of Safaga is composed of a complex pattern of sedimentary facies that are generally rich in molluscs. Thirteen diver-taken bulk-samples from various sites (reef slopes, sand between coral patches, muddy sand, mud, sandy seagrass, muddyseagrass, mangrove channel) at water depths ranging from shallow subtidal to 40m were investigated with regard to their mollusc fauna > 1mm, which was separated into fragments and whole individuals. Fragments make up more than 88% of the total mollusc remains of the samples, andtheir proportions correspond to characteristics of the sedimentary facies. The whole individuals were differentiated into 622 taxa. The most common taxon, Rissoina cerithiiformis, represented more than 5% of the total mollusc content in the samples. The main part of the fauna consists of micromolluscs, including both small adults and juveniles. Based on the results of cluster-, correspondence-, and factor analyses the fauna was grouped into several associations, each characterizing a sedimentary facies: (1) ''Rhinoclavis sordidula - Corbula erythraeeasis - Pseudominolia nedyma association'' characterizes mud. (2) ''Microcirce sp. - Leptomyaria sp, association'' characterizes muddy sand. (3)''Smaragdia spp. - Perrinia stellata - Anachis exilis - assemblage'' characterizes sandy seagrass. (4) ''Crenella striatissima - Rastafariacalypso - Cardites akabana - assemblage'' characterizes muddy seagrass. (5) ''Glycymeris spp. - Parvicardium sueziensis - Diala spp. - assemblage'' characterizes sand between coral patches. (6) ''Rissoina spp.- Triphoridae - Ostreoidea - assemblage'' characterizes reef slopes. (7) ''Potamides conicus - Siphonaria sp. 2 - assemblage'' characterizes the mangrove. The seagrass fauna is related to those of sand betweencoral patches and reef slopes with respect to gastropod assemblages, numbers of taxa and diversity indices, and to the muddy sand fauna on the basis of bivalve assemblages and feeding strategies of bi valves. The mangrove assemblage is related to those of sand between coral patches and the reef slope with respect to taxonomic composition and feeding strategies of bivalves, but has a strong relationship to those of the fine-grained sediments when considering diversity indices. Reef slope assemblages are closely related to that of sand between coral patches in all respects, except life habits of bivalves, which distinctly separates the reef slope facies from all others.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 11:52:47