Caracteristcs and Importance of Planktonic Flagellates in Marine Coastal and Oceanic Ecosystems

Bergesch, Marli; Odebrecht, Clarisse

doi:10.4257/oeco.2001.0901.12

Cited by 2 publications

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“…Nanoflagellates are poorly known in the southwestern Atlantic Ocean, partly due to the need to work with electron microscopy (Patterson andLee 2000, Bergesch andOdebrecht 2001). Knowledge of the nanoflagellates from the Southern Hemisphere increased through the work of Hallegraeff (2004, 2006) in Australian waters, who demonstrated the apparent cosmopolitanism of many scale-bearing nanoflagellate species.…”

Section: Introductionmentioning

confidence: 97%

Nanoflagellates from coastal waters of southern Brazil (32°S)

Bergesch¹,

Odebrecht²,

Moestrup³

2008

Botm

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A taxonomic survey of nanoflagellates in the extreme southern Brazilian coastal waters of the Patos Lagoon estuary and adjacent coastal shelf was undertaken using transmission electron microscopy. A total of 44 species was recorded including 42 nanoflagellates, one scale-bearing amoeba and two species incertae sedis. Scale-bearing haptophytes predominated (27 species), followed by prasinophytes (7), chrysophytes (6), pedinellids (2), incertae sedis (2) and one scale-bearing amoeba. Most of the species (42) are new records for Brazilian marine waters. Among the haptophytes, Chrysochromulina was the most species-rich genus, occurring mainly in high salinity waters, and C. simplex was the most frequent species. Scales of undescribed Chrysochromulina species were observed and documented. Other haptophytes present were Prymnesium parvum and Phaeocystis scrobiculata. Five scale-bearing prasinophytes of the genus Pyramimonas were observed including the uncommon species P. longicauda, in addition to Micromonas pusilla and Nephroselmis pyriformis. Among the chrysophytes, the scale-bearing Paraphysomonas species (4) and the loricate Dinobryon belgica were recorded. The pedinellids (Apedinella radians and Parapedinella reticulata), the amoeba Rabdiophrys sp. and the incertae sedis (Meringosphaera mediterranea, Thaumatomastix sp.) are all scale-bearing protists. The 44 taxa (mostly scale-bearing flagellate species) identified and the finding of further undescribed Chrysochromulina species indicate that only a fraction of the species present in the region are known, and that an effort must be made to increase general knowledge of biodiversity in these southern waters.

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Section: Introductionmentioning

confidence: 97%

Nanoflagellates from coastal waters of southern Brazil (32°S)

Bergesch¹,

Odebrecht²,

Moestrup³

2008

Botm

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“…The nanoflagellates are abundant in the estuarine and coastal areas of southern Brazil (Odebrecht & Abreu 1997, Odebrecht & Garcia 1997, Bergesch & Odebrecht 2001, and comprise several taxonomic groups including haptophytes, prasinophytes, chrysophytes and pedinellids (Bergesch et al 2008). The present article is the first report of loricate choanoflagellates in the area.…”

Section: Discussionmentioning

confidence: 88%

“…In southern Brazilian waters, the size structure and composition of phytoplankton have been documented by several authors ( Odebrecht & Abreu 1997, Odebrecht & Garcia 1997, Bergesch & Odebrecht 2001, Bergesch et al 2008) but characterization of the heterotrophic community is still lacking. Here we present detailed information on loricate choanoflagellate species composition and distribution in the South Brazilian coastal waters, and the description of one new species of the genus Diplotheca .…”

Section: Introductionmentioning

confidence: 99%

Loricate Choanoflagellates from the South Atlantic coastal zone (~32 °S) including the description of Diplotheca tricyclica sp. nov.

2008

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The biodiversity of marine heterotrophic protists is poorly known in the South Atlantic coastal zone (~32 °S) especially regarding the nanoflagellates. The presence of loricate choanoflagellates was reported for the first time in the Patos Lagoon estuary and the adjacent coastal zone. Seventeen species of eleven genera of loricate choanoflagellates were observed between October 1998 and May 2000 in fixed water samples (lugol's solution + glutaraldehyde) in a JEM 100-SX transmission electron microscope. Most species were recorded in euhaline and mixopolyhaline waters during the spring and summer, none in autumn and a few (four) in winter. The absence of choanoflagellates at the more sheltered inshore stations is due freshwater influence, and at the beach station, probably due the strong wave action. The probably cosmopolitan species Pleurasiga minima, Cosmoeca norvegica, C. ventricosa and Parvicorbicula circularis were present in spring or summer in the estuary channel and coastal area while Stephanoeca diplocostata which apparently prefers lower temperature, was recorded in winter. Calotheca alata and Campyloacantha spinifera are mainly temperate species and were present in spring. The new species Diplotheca tricyclica was recorded at the estuary channel in the summer 1999, in high salinity water.

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Caracteristcs and Importance of Planktonic Flagellates in Marine Coastal and Oceanic Ecosystems

Cited by 2 publications

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Nanoflagellates from coastal waters of southern Brazil (32°S)

Nanoflagellates from coastal waters of southern Brazil (32°S)

Loricate Choanoflagellates from the South Atlantic coastal zone (~32 °S) including the description of Diplotheca tricyclica sp. nov.

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