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Trophic structure and productivity of the lagoonal communities of Tikehau atoll (Tuamotu Archipelago, French Polynesia)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Charpy, L. J. Charpy-Roubaud, Claude J. |
| Copyright Year | 2004 |
| Abstract | Carbon standing stocks and fluxes were studied in the lagoon of Tikehau atoll (Tuamotu archipelago, French Polynesia), from 1983 to 1988.The average POC concentration (0.7–2000 µm) was 203 mg C m−3. The suspended living carbon (31.6 mg C m−3) was made up of bacteria (53%), phytoplankton < 5 µm (14.2%), phytoplankton > 5 µm (14.2%), nanozooplankton 5–35 µm (5.7%), microzooplankton 35–200 µm (4.7%) and mesozooplankton 200–2000 µm (7.9%). The microphytobenthos biomass was 480 mg C m−2.Suspended detritus (84.4% of the total POC) did not originate from the reef flat but from lagoonal primary productions. Their sedimentation exceeded phytobenthos production.It was estimated that 50% of bacterial biomass was adsorbed on particles. the bacterial biomass dominance was explained by the utilisation of 1) DOC excreted by phytoplankton (44–175 mg C m−2 day −1) and zooplankton (50 mg Cm−2 day−1)2) organic compounds produced by solar-induced photochemical reactions 3) coral mucus.50% of the phytoplankton biomass belongs to the < 5 µm fraction. This production (440 mg C m−2 day−1) exceeded phytobenthos production (250 mg C m−2 day−1) when the whole lagoon was considered.The zooplankton > 35 µm ingested 315 mg C m−2 day−1, made up of phytoplankton, nanozooplankton and detritus. Its production was 132 mg C m−2 day−1. |
| Starting Page | 43 |
| Ending Page | 52 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF00041439 |
| Volume Number | 207 |
| Alternate Webpage(s) | http://www.atolls-polynesie.ird.fr/fnatoll/pdf/restrop1.pdf |
| Alternate Webpage(s) | http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_31-32/34224.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/BF00041439 |
| Journal | Hydrobiologia |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
