The link between meiofauna and surface productivity in the Southern Ocean

Lins, Lidia; Guilini, Katja; Veit-Köhler, Gritta; Hauquier, Freija; Alves, R.M.S.; Esteves, André Morgado; Vanreusel, Ann

doi:10.1016/j.dsr2.2014.05.003

Cited by 32 publications

(22 citation statements)

References 45 publications

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“…When settled, these aggregates will potentially act as food source for the benthic fauna dwelling at the deep-sea bottom. This benthic-pelagic coupling between food supply from the photic zone and its settlement to the seafloor was demonstrated in many bathyal and abyssal studies (Billett et al, 1983;Lampadariou and Tselepides, 2006;Lins et al, 2014;Pape et al, 2013b;Rex et al, 2006;Smith et al, 2006Smith et al, , 2008Wei et al, 2010). On the contrary, differences in benthic community structure, diversity and biomass in conjunction with differences in surface primary productivity were rarely studied (Guilini et al, 2013 cf.…”

Section: Introductionmentioning

confidence: 92%

Nematode community composition and feeding shaped by contrasting productivity regimes in the Southern Ocean

Lins

Silva

Hauquier

et al. 2015

Progress in Oceanography

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Section: Introductionmentioning

confidence: 92%

Nematode community composition and feeding shaped by contrasting productivity regimes in the Southern Ocean

Lins

Silva

Hauquier

et al. 2015

Progress in Oceanography

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“…Stations 141-8 and 175-3 were sampled at comparable water depths ($ 4100 m) during the austral summer on the 18th of February and the 3rd of March, respectively ( Table 1). The first station is located under a very high sea-surface primary production being exported while the second station is located north of South Georgia, in an area of constantly high production during the austral summer (Jones et al, 2012;Lins et al, 2014). Extensive data about all stations are available in Janussen et al (2013).…”

Section: Methodsmentioning

confidence: 99%

“…We hypothesize that deep-sea foraminiferans contain pigments from algae that settled from the euphotic zone and were ingested fresh or degraded. We analysed the algal pigment contents of four foraminifera species collected at two deep-sea benthic stations characterized by high net primary productivities and high bottom chlorophyll a concentrations (Lins et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Algal pigments in Southern Ocean abyssal foraminiferans indicate pelagobenthic coupling

Cedhagen

Cheah

Bracher

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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a b s t r a c tThe cytoplasm of four species of abyssal benthic foraminiferans from the Southern Ocean (around 511S; 121W and 501S; 391W) was analysed by High Performance Liquid Chromatography (HPLC) and found to contain large concentrations of algal pigments and their degradation products. The composition of the algal pigments in the foraminiferan cytoplasm reflected the plankton community at the surface. Some foraminiferans contained high ratios of chlorophyll a/degraded pigments because they were feeding on fresher phytodetritus. Other foraminiferans contained only degraded pigments which shows that they utilized degraded phytodetritus. The concentration of algal pigment and corresponding degradation products in the foraminiferan cytoplasm is much higher than in the surrounding sediment. It shows that the foraminiferans collect a diluted and sparse food resource and concentrate it as they build up their cytoplasm. This ability contributes to the understanding of the great quantitative success of foraminiferans in the deep sea. Benthic foraminiferans are a food source for many abyssal metazoans. They form a link between the degraded food resources, phytodetritus, back to the active metazoan food chains.

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“…However, this does not necessarily mean that coupling of the benthic communities to surface production does not occur in the SPF at all. On the one hand there are indications of tight linkages between surface primary productivity and meiofaunal densities as well as pigment uptake by foraminiferans (Lins et al, 2014;Cedhagen et al, 2014). On the other hand, high ratios of Si:C in sinking particles might reduce vertical POC fluxes and thus food supply for benthic organisms (Assmy et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…(Sachs et al, 2009: 1326), a genus being characterized by much lower Si: C ratios and thus serving as a particularly efficient carbon-sinking species (Assmy et al, 2013). Congruently, high surface concentration of Chl-a translated to increased densities and response of meiofauna (station 141; see data by Lins et al, 2014). At this station and further to the west in the SPF north of South Georgia, some foraminiferans were found to contain large amounts of pigments (Cedhagen et al, 2014) indicating immediate grazing of the freshly sedimented food pulse.…”

Section: Discussionmentioning

confidence: 99%

Are boundary conditions in surface productivity at the Southern Polar Front reflected in benthic activity?

Brandt

Vanreusel

Bracher

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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a b s t r a c tIn austral summer 2012, during the expedition ANT-XXVIII/3 on board RV Polarstern, two sites were sampled 1600 km apart in the South Polar Front area (521S) at the boundary of different productivity regimes for meio-and macrobenthos using a multiple-corer and an epibenthic sledge, respectively. Patterns in density and abundance data were compared between different size classes of the benthos and interpreted in relation to surface primary productivity data and sediment oxygen consumption. We tested the hypothesis that long-term satellite-derived surface phytoplankton biomass, in situ real time biomass, and productivity measurements at the surface and throughout the euphotic zone are reflected in abyssal benthos densities, abundances and activity. Specifically, we investigated the effect of boundary conditions for lower and higher surface productivity. Surface and integrated to 100 m depth biomass and primary productivity measurements vary stations, with the lowest values at station 85 (0.083 mg Chla m À 3 at surface, 9 mg Chl-a m

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The link between meiofauna and surface productivity in the Southern Ocean

Cited by 32 publications

References 45 publications

Nematode community composition and feeding shaped by contrasting productivity regimes in the Southern Ocean

Nematode community composition and feeding shaped by contrasting productivity regimes in the Southern Ocean

Algal pigments in Southern Ocean abyssal foraminiferans indicate pelagobenthic coupling

Are boundary conditions in surface productivity at the Southern Polar Front reflected in benthic activity?

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