INVESTIGADORES
ALDER Viviana Andrea
artículos
Título:
Patterns in tintinnid species composition and abundance in relation to hydrological conditions of the southwestern Atlantic during austral spring.
Autor/es:
GUSTAVO A. THOMPSON ,; VIVIANA A. ALDER
Revista:
AQUATIC MICROBIAL ECOLOGY
Editorial:
INTER-RESEARCH SCIENCE CENTER
Referencias:
Año: 2005 vol. 40 p. 85 - 101
ISSN:
0948-3055
Resumen:
ABSTRACT: The tintinnid community was assessed on a collection of 42 samples taken at depths of
5, 10, 25 and 50 m from 17 oceanographic stations located along 34 to 62° S, 51 to 57°W, in November
1995. Samples were collected by means of a Niskin bottle cast, and reverse-filtered through a
10 ìm mesh filter. A total of 60 tintinnid taxa were recorded, most of which with a distribution circumscribed
to Antarctic, Subantarctic or Brazil-Malvinas Confluence waters, thus allowing the distinction
of Antarctic, Subantarctic and Transitional biogeographic zones, respectively. A comparison based
on the analysis of Niskin bottle versus flowmetered 35 ìm mesh net paired samples indicated that
absolute abundances of tintinnid species with diameters >40 ìm almost did not differ between
collecting methods. Tintinnid abundances and species structure reflected the degree of variability in
the hydrological conditions of the southwestern Atlantic between 1994 and 1995. Sea surface temperature
fluctuations within Brazil-Malvinas Confluence waters involved pronounced changes in the
tintinnid communities of the Transition Zone: the increase of southward warm water transport during
1994 favoured the dominance of subtropical species along the ecotone, while its decrease during
1995 favoured the contribution of subantarctic species. Low hydrological variability in the Subantarctic
and Antarctic Zones was reflected in a quite similar tintinnid community structure during
these 2 years. Acanthostomella norvegica forma typica and Cymatocylis antarctica forma typica in
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
Acanthostomella norvegica forma typica and Cymatocylis antarctica forma typica in
the Subantarctic Zone, and Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
might be regarded as key tintinnid species, based on their persistence and dominance.
Codonellopsis gaussi and Cymatocylis convallaria in the Antarctic Zone,
might be regarded as key tintinnid species, based on their persistence and dominance.