Composition, density and size-structure of the autotrophic plankton community in a shallow coastal zone at King George Island, West Antarctic Peninsula (WAP), during early summer 2010
| Autor: | Márcio Murilo Barboza Tenório, José Juan Barrera Alba, Denise Rivera Tenenbaum, Mariana Vanzan |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Chlorophyll a geography Biomass (ecology) geography.geographical_feature_category 010504 meteorology & atmospheric sciences Ecology 010604 marine biology & hydrobiology General Medicine Biology Plankton 01 natural sciences chemistry.chemical_compound Oceanography chemistry Peninsula Phytoplankton Composition (visual arts) Autotroph Bay 0105 earth and related environmental sciences |
| Zdroj: | Brazilian Journal of Aquatic Science and Technology. 19:9-17 |
| ISSN: | 1983-9057 1808-7035 |
| Popis: | The planktonic microorganism community of Admiralty Bay, Antarctic Peninsula is being monitored since 2002. This study describes composition, size-structure and biomass of the phytoplankton communities observed during early summer 2010/2011 in the area. Organisms were counted by microscopy and scored as belonging to three size classes: 10 µm dominated in terms of biomass (> 50% of Chlorophyll a) with densities of up to 1.6 x 104 cells L-1, which is approximately 0.6 times higher than observed for early summer in recent years. Additionally, our results confirm a previously observed phenomenon whereby large-size phytoplankton (> 80 µm), especially pennate diatoms, are replaced by mid-size centric diatoms (10- 80 µm), such as Thalassiosira spp., and small dinoflagellates (e.g. Prorocentrum antarcticum) during warmer early summers. |
| Databáze: | OpenAIRE |
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