Diel changes in the near-surface biomass of zooplankton and the carbon content of vertical migrants

Hays, Graeme C.; Harris, Roger P.; Head, Robert

doi:10.1016/s0967-0645(00)00109-0

Cited by 16 publications

(9 citation statements)

References 16 publications

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“…Methods for zooplankton biomass estimation are relatively standard and calculated values have been reported for different areas worldwide (Fernández de Puelles et al 2003, Hays et al 2001, Irigoien and Castel 1995, Kimmerer and McKinnon 1987, Melo Júnior et al 2007, Rawlinson et al 2005, Roman et al 2002. However, data are generally obtained from samples collected with nets of mesh diameter ranging from 64 to 300 μm.…”

Section: Discussionmentioning

confidence: 99%

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

et al. 2015

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Background: A fundamental step in characterizing marine planktonic communities is the knowledge of the variability of their biomass and production, in order to assess the flux of matter through the food web and estimate the fate of this energy. The zooplankton assemblage's dynamics of the Mondego estuary (Portugal) have been extensively characterized, but none have focused on biomass and secondary production. In the present study, zooplankton biomass and secondary production were investigated with a seasonal basis in a fixed station, located at the mouth of the Mondego estuary (Portugal), with emphasis on the copepod community. In order to study the influence of physical processes operating at different temporal scales, sub-surface and near-bottom samples were collected every 2 h in diel and tidal cycles, over neap tides. Results: Copepods dominated the biomass during spring (0.585 ± 0.671 mg C m

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Section: Discussionmentioning

confidence: 99%

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

et al. 2015

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“…Intense daytime zooplanktivory by fish may be one of the major factors determining diel variation in coral-reef zooplankton (Muscatine & Porter 1977). Some larger individuals experience a greater susceptibility to visual predators (Hays et al 2001) and hence they need to descend and spend the daytime near the bottom or in the crevices of the coral substratum. This behavior in the large sized zooplankton may have caused the strong day/night difference.…”

Section: Discussionmentioning

confidence: 99%

Diel variation in abundance, biomass and size composition of zooplankton community over a coral-reef in Redang Island, Malaysia

Nakajima

Yoshida

Othman

et al. 2008

Plankton Benthos Res

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Abstract:To understand coral-reef zooplankton ecology on a diel basis, zooplankton abundance, biomass and size composition from a fringing coral-reef of Redang Island, Malaysia, were investigated at three-hour intervals for a 48 hour period. Zooplankton was collected vertically and size-fractionated into three size-classes; 100-200 mm, 200-335 mm, and Ͼ335 mm. Diel variation of the zooplankton showed that the catches at night were always higher than those in the daytime and the nocturnal increase occurred most strongly in the large fraction (Ͼ335 mm). Zooplankton abundance steeply increased just after sunset, showed an abrupt increase 1.5 hour later and declined sharply thereafter. Observation of diel variation in coral-reef zooplankton from three-hour intervals revealed that the temporal variation was large in this study.

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“…Grazing of micro-organisms by demersal zooplankton and pelagic nanoflagellates or ciliates is unlikely, because this would have also happened in the control transect, and large zooplankton concentrations are scarce during the day (Yahel et al 2005). By considering a mean value of 20 µg C organism -1 (Hays et al 2001), zooplankton could have only contributed 3 to 10% of the planktonic biomass (or 4 to 12 µg C l -1 ). Finally, the last cause of plankton depletion above the reef might have been particles sticking to coral mucus (Coffroth 1990, Wild et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Picoplankton removal by the coral reef community of La PrÈvoyante, Mayotte Island

Houlbrèque¹,

Delesalle²,

Blanchot³

et al. 2006

Aquat. Microb. Ecol.

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We examined the trophic contribution of pico-and nanoplankton to a patch reef dominated by scleractinian corals and located at Mayotte Island (Comoro Archipelago). Pico-and nanoplankton concentrations, as well as total particulate organic matter, were measured on a sandybottom and a patch reef transect. Results showed that particles <10 µm accounted for 74% of the chlorophyll a concentration and for 47% of the total living carbon. Synechococcus sp. represented 65% of the chlorophyll < 3 µm and 53 and 67% of the autotrophic carbon and nitrogen, respectively, followed by picoeukaryotes, nanoeukaryotes and Prochlorococcus sp. Concentrations of total chlorophyll a, as well as picoplankton groups, were depleted 30 to 45% above the reef compared to in the adjacent waters and in sandy-bottom samples. Concentrations of nanoflagellates and total particulate organic matter, by contrast, remained unchanged during their passage across the reef. These results suggest selective grazing of picoplankton by the benthic community and compound the importance of picoplankton for the benthic-pelagic coupling and trophic dynamics on coral reefs. KEY WORDS: Picoplankton · Nanoplankton · Benthos · Coral reef communities · Particle removal Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 44: [59][60][61][62][63][64][65][66][67][68][69][70] 2006 brèque et al. 2004b) and greatly benefit from zooplankton-derived energy (Houlbrèque et al. 2003(Houlbrèque et al. , 2004a. In this respect, pico-and nanoplankton should play a significant role in reef energetics -they can reach very high growth and production rates and they represent an important fraction of the reef planktonic biomass (Ducklow 1990).The aim of this study was to examine the in situ contribution of pico-and nanoplankton to the carbon and nitrogen removed by a patch reef, to gain a better understanding of the functioning of such ecosystems. In situ measurements avoid some of the artifacts known in flume experiments, such as limitation in size and food replenishment (Genin & Yahel 2002). They are, however, difficult to obtain, except under conditions of homogeneous or confined flows, such as those found in lagoons and channels (Genin & Yahel 2002). For this reason, we have chosen the reef of La Prévoy-ante (Mayotte Island) because it is located in one of the largest lagoons of the Indian Ocean. In this lagoon, flow rates are low and homogeneous; the reefs are considered healthy and are colonized by large colonies of Galaxea astreata and Acropora spp. (ORC 2003). Concentrations of phytoplankton (total and fractionated chlorophyll, Prochlorococcus sp., Synechococcus sp., picoeukaryotes) and heterotrophic microorganisms (bacteria, nanoflagellates, ciliates), as well as total and fractionated particulate organic matter, were measured on 2 transects located above a sand floor or above the reef. MATERIALS AND METHODSStudy site. The study was carried out in May in the lagoon of the French Comorian island of Mayotte (12°41' S, 45°...

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Diel changes in the near-surface biomass of zooplankton and the carbon content of vertical migrants

Cited by 16 publications

References 16 publications

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

Diel variation in abundance, biomass and size composition of zooplankton community over a coral-reef in Redang Island, Malaysia

Picoplankton removal by the coral reef community of La PrÈvoyante, Mayotte Island

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