Oceanography and the base of the pelagic food web in the southern Indian Ocean

Visser, André W.; Nielsen, Torkel Gissel; Middelboe, Mathias; Høyer, Jacob L.; Markager, Stiig

doi:10.1093/plankt/fbv019

Cited by 7 publications

(6 citation statements)

References 46 publications

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“…In general, the surface modeled BP is ∼10%–20% of the surface modeled NPP, which is within the range suggested by several field observations (Ducklow & Kirchman, 2000; Ducklow et al., 2002; Kirchman et al., 1995, 2009; Lochte et al., 1997) (Figure 5b). In the low‐latitude, oligotrophic areas, the surface modeled BP/NPP ratio can be higher and close to ∼30%, especially in the coastal regions, which have been suggested by some studies in the Indian Ocean (Kirchman et al., 2009; Visser et al., 2015) (Figure 5b). In contrast, the BP/NPP ratio can be lower than 0.1 in the Southern Ocean, where water is colder and FL bacteria is limited by the availability of DOC (Kirchman et al., 2009; Teira et al., 2012).…”

Section: Resultssupporting

confidence: 60%

Examining the Interaction Between Free‐Living Bacteria and Iron in the Global Ocean

Pham

Aumont

Ratnarajah

et al. 2022

Global Biogeochemical Cycles

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Heterotrophic bacteria (hereafter bacteria) account for a significant portion of the ocean carbon biomass (Buitenhuis et al., 2012) and play various roles in oceanic nutrient cycles. Despite the wide variety of bacteria that live under various conditions (Sogin et al., 2006;Zakem et al., 2020), free-living (FL), carbon-oxidizing bacteria have been the focus of previous studies due to their control on the flow of carbon and bio-essential elements through the marine food web (Azam & Malfatti, 2007;del Giorgio & Duarte, 2002;Jiao et al., 2010). Carbon-oxidizing bacteria either transforms a fraction of the organic matter fixed by phytoplankton into a highly refractory form, thus keeping carbon away from the atmosphere for several millennia or respires the fixed organic matter to release inorganic carbon and nutrients back to the seawater, thus sustaining oceanic primary production (Jiao et al., 2010(Jiao et al., , 2014. Other bacterial groups, such as particle-attached, nitrogen-oxidizing, and sulfur-oxidizing bacteria and archaea, carry out various chemical transformations, which modulate the ocean nitrogen and sulfur cycles and produce potent greenhouse gas (nitrous oxide and methane) (

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Section: Resultssupporting

confidence: 60%

Examining the Interaction Between Free‐Living Bacteria and Iron in the Global Ocean

Pham

Aumont

Ratnarajah

et al. 2022

Global Biogeochemical Cycles

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“…In general, the surface modeled BP is ∼10%-20% of the surface modeled NPP, which is within the range suggested by several field observations (Ducklow & Kirchman, 2000;Ducklow et al, 2002;Kirchman et al, 1995Kirchman et al, , 2009Lochte et al, 1997) (Figure 5b). In the low-latitude, oligotrophic areas, the surface modeled BP/NPP ratio can be higher and close to ∼30%, especially in the coastal regions, which have been suggested by some studies in the Indian Ocean (Kirchman et al, 2009;Visser et al, 2015) (Figure 5b). In contrast, the BP/NPP ratio can be lower than 0.1 in the Southern Ocean, where water is colder and FL bacteria is limited by the availability of DOC (Kirchman et al, 2009;Teira et al, 2012).…”

Section: Fe Doc and Fl Bacteria Biomass And Productionsupporting

confidence: 58%

Examining the interaction between free-living bacteria and iron in the global ocean

Pham

Aumont

Ratnarajah

et al. 2021

Preprint

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…6 in the tropical waters of the Indonesian Throughflow, and Sta. 7 at the Northwest Australian Shelf (Visser et al ).…”

Section: Resultsmentioning

confidence: 99%

The land–sea interface: A source of high‐quality phytoplankton to support secondary production

Winder

Carstensen

Galloway

et al. 2017

Limnology & Oceanography

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Coastal‐estuarine systems are among the most productive marine ecosystems and their special role in producing harvestable fish and shellfish has been attributed to high primary production fueled by nutrient runoff from land and efficient trophic transfer. Here we ask if phytoplankton species composition and their food quality based on the percentage of long‐chain essential fatty acids (LCEFA) is another factor contributing to high secondary production in these ecosystems. We used long‐term measurements of major phytoplankton taxonomic groups and estimated their content of LCEFA along the salinity gradient in coastal‐estuarine ecosystems, with emphasis on Chesapeake Bay and the Baltic Sea, and an oceanic transect. Our data show that cyanobacteria with low nutritional quality often dominate at low‐salinity regions, while intermediate to higher salinity regions produce diatoms and dinoflagellates that have a higher content of LCEFA and are thus a higher‐quality food resource for consumers. Higher salinity regions have less pronounced seasonal changes in the percentage of phytoplankton LCEFA compared to low salinity regions, providing a stable supply of nutritious phytoplankton to consumers. The phytoplankton LCEFA content is similarly high in coastal upwelling systems and it decreases further offshore in oligotrophic oceanic regions dominated by picophytoplankton. Our results from a broad range of coastal‐ecosystem types show that ecosystems at the land‐sea interface provide a valuable service by producing phytoplankton enriched in the biochemicals essential for consumers. High primary production, coupled with high quality of that production, explain why the production of fish and shellfish is high where land and sea meet.

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Oceanography and the base of the pelagic food web in the southern Indian Ocean

Cited by 7 publications

References 46 publications

Examining the Interaction Between Free‐Living Bacteria and Iron in the Global Ocean

Examining the Interaction Between Free‐Living Bacteria and Iron in the Global Ocean

Examining the interaction between free-living bacteria and iron in the global ocean

The land–sea interface: A source of high‐quality phytoplankton to support secondary production

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