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Titolo:
SIGNIFICANCE OF BACTERIA IN CARBON FLUXES IN THE ARABIAN SEA
Autore:
AZAM F; STEWARD GF; SMITH DC; DUCKLOW HW;
Indirizzi:
UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,DIV MARINE BIOL RES LA JOLLA CA 92093 COLL WILLIAM & MARY,VIRGINIA INST MARINE SCI GLOUCESTER POINT VA 23062
Titolo Testata:
Proceedings of the Indian Academy of Sciences. Earth and planetary sciences
fascicolo: 2, volume: 103, anno: 1994,
pagine: 341 - 351
SICI:
0253-4126(1994)103:2<341:SOBICF>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICULATE ORGANIC-MATTER; AGGREGATES MARINE SNOW; HETEROTROPHIC BACTERIA; COASTAL WATERS; SEDIMENT TRAPS; INDIAN-OCEAN; AMINO-ACIDS; PHYTOPLANKTON; GROWTH; DECOMPOSITION;
Keywords:
BACTERIA; ECTOENZYMES; DISSOLVED ORGANIC CARBON; PARTICULATE ORGANIC CARBON; SINKING FLUX; AGGREGATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
F. Azam et al., "SIGNIFICANCE OF BACTERIA IN CARBON FLUXES IN THE ARABIAN SEA", Proceedings of the Indian Academy of Sciences. Earth and planetary sciences, 103(2), 1994, pp. 341-351

Abstract

In the Arabian Sea, temporal contiguity of highly oligotrophic and eutrophic periods, along with high water temperatures, may result in unique features of bacteria-organic matter coupling, nutrient cycling andsedimentation, which are unlike those in the classical oligotrophic and eutrophic waters. Bacteria-phytoplankton interactions are suggestedto influence phytoplankton. aggregation and its timing. It is also hypothesized that, within aggregates, hydrolytic ectoenzyme activity, together with condensation reactions between the hydrolysis products, produce molecular species which are not readily degraded by pelagic bacteria. Accumulation of a reservoir of such slow-to-degrade dissolved organic carbon (DOC) is proposed to be a carbon flux and energy buffer, which moderates the response of bacteria to the dramatic variations inprimary production in the Arabian Sea. Use of the slow-to-degrade DOCpool during the intermonsoon could temporarily render the Arabian Seanet-heterotrophic and a source of CO2 to the atmosphere. Stored DOC is also suggested to balance the observed deficit between mesopelagic carbon demand and the sinking particulate organic carbon supply. Knowledge of the significance of bacteria in carbon storage and cycling in the Arabian Sea is needed to understand the response of the ocean's biogeochemical state to strong physical forcing and climate change.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 18:49:17