Persistence of labile organic matter and microbial biomass in Antarctic shelf sediments: evidence of a sediment food bank

Mincks, Sarah L.; Smith, Craig R.; DeMaster, David J.

doi:10.3354/meps300003

Cited by 167 publications

(130 citation statements)

References 80 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…Additionally, cold Southern Ocean deep-sea conditions can result in the persistence of organic matter in sediments and act as a year round food supply to deposit feeding fauna, dampening the effects of strong seasonal pulses of food (Mincks et al, 2005;Glover et al, 2008). When compared to the similarly sized deep-sea protobranch Ledella pustulosa (Gage, 1994), the Antarctic species have lower overall growth performances, although this is not expected to be related to food availability.…”

Section: Discussionmentioning

confidence: 99%

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Reed

Morris

Linse

et al. 2013

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

Cite this article as: Adam J. Reed, James P. Morris, Katrin Linse, Sven Thatje, Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions, Deep-Sea Research I, http://dx.doi.org/10. 1016/j.dsr.2013.07.006 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ability to differentially adapt between cold-stenothermal environments. This study suggests that subtle changes in the environment may lead to a divergence in the ecology of invertebrate populations and showcases the protobranch bivalves as a future model group for the study of speciation and radiation processes through cold-stenothermal environments.

show abstract

Section: Discussionmentioning

confidence: 99%

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Reed

Morris

Linse

et al. 2013

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

show abstract

“…The Antarctic Peninsula shelf undergoes seasonal deposition of high amounts of phytodetritus coming from fast-sinking sea ice algae aggregates (Riebesell et al 1991) and from post-sea ice retreat summer phytoplankton blooms ). This material accumulates in sediments, where it constitute persistent ''food banks'' that are available to benthic consumers all year round (Mincks et al 2005. Here, data from stations sampled during the PS81 cruise accordingly suggested that over the 2008-2012 period, both average sea ice cover and surface primary productivity were higher in Weddell Sea than in the other areas Dorschel et al 2015; Table 1).…”

mentioning

confidence: 86%

“…The Antarctic Peninsula is indeed one of the most quickly warming regions of the world, and as a result, sea ice cover in this area shows an important decrease (Turner et al 2005;Parkinson and Cavalieri 2012). These changes will undoubtedly in turn modify sea urchin trophic environment, and warmer temperatures notably cause a decrease in the amount of material available to benthic consumers in ''food banks'' (Mincks et al 2005). While sea urchin responses to such changes are difficult to predict, our results suggest that differences in adaptive strategies could lead to different effects on each of the studied families' feeding habits, biology and, ultimately, distribution in the Southern Ocean.…”

mentioning

confidence: 99%

Trophic plasticity of Antarctic echinoids under contrasted environmental conditions

et al. 2015

View full text Add to dashboard Cite

Echinoids are common members of Antarctic zoobenthos, and different groups can show important trophic diversity. As part of the ANT-XXIX/3 cruise of RV Polarstern, trophic plasticity of sea urchins was studied in three neighbouring regions (Drake Passage, Bransfield Strait and Weddell Sea) featuring several depth-related habitats offering different trophic environments to benthic consumers. Three families with contrasting feeding habits (Cidaridae, Echinidae and Schizasteridae) were studied. Gut content examination and stable isotopes ratios of C and N suggest that each of the studied families showed a different response to variation in environmental and food conditions. Schizasteridae trophic plasticity was low, and these sea urchins were bulk sediment feeders relying on sediment-associated organic matter in all regions and/or depth-related habitats. Cidaridae consumed the most animal-derived material. Their diet varied according to the considered area, as sea urchins from Bransfield Strait relied mostly on living and/or dead animal material, while specimens from Weddell Sea fed on a mixture of dead animal material and other detritus. Echinidae also showed important trophic plasticity. They fed on various detrital items in Bransfield Strait, and selectivity of ingested material varied across depth-related habitats. In Weddell Sea, stable isotopes revealed that they mostly relied on highly 13 C-enriched food items, presumably microbially reworked benthic detritus. The differences in adaptive strategies could lead to family-specific responses of Antarctic echinoids to environmental and food-related changes.

show abstract

“…However, minor increases in temperature will also increase overall metabolic rates of benthic and pelagic communities. In Antarctic regions, one of the key processes that is thought to govern the deepwater soft sediment communities is captured in the FOODBANCS hypothesis (Smith and DeMaster, 2008), according to which concentrated summer food pulses and slow microbial enzymatic activity caused by the cold temperatures provide a long-lasting food bank that supports benthic metazoan communities (Mincks et al, 2005). With increasing temperatures, bacterial recycling will be enhanced, potentially leading to a non-linear increase in the overall metabolism of the benthic community and increased food limitation in deeper seas ( Figure 4A).…”

Section: The Polar Deep Seasmentioning

confidence: 99%

Major impacts of climate change on deep-sea benthic ecosystems

Sweetman

Thurber

Smith

et al. 2017

Elementa: Science of the Anthropocene

282

297

View full text Add to dashboard Cite

The deep sea encompasses the largest ecosystems on Earth. Although poorly known, deep seafloor ecosystems provide services that are vitally important to the entire ocean and biosphere. Rising atmospheric greenhouse gases are bringing about significant changes in the environmental properties of the ocean realm in terms of water column oxygenation, temperature, pH and food supply, with concomitant impacts on deep-sea ecosystems. Projections suggest that abyssal (3000-6000 m) ocean temperatures could increase by 1°C over the next 84 years, while abyssal seafloor habitats under areas of deep-water formation may experience reductions in water column oxygen concentrations by as much as 0.03 mL L -1 by 2100. Bathyal depths (200-3000 m) worldwide will undergo the most significant reductions in pH in all oceans by the year 2100 (0.29 to 0.37 pH units). O 2 concentrations will also decline in the bathyal NE Pacific and Southern Oceans, with losses up to 3.7% or more, especially at intermediate depths. Another important environmental parameter, the flux of particulate organic matter to the seafloor, is likely to decline significantly in most oceans, most notably in the abyssal and bathyal Indian Ocean where it is predicted to decrease by 40-55% by the end of the century. Unfortunately, how these major changes will affect deep-seafloor ecosystems is, in some cases, very poorly understood. In this paper, we provide a detailed overview of the impacts of these changing environmental parameters on deep-seafloor ecosystems that will most likely be seen by 2100 in continental margin, abyssal and polar settings. We also consider how these changes may combine with other anthropogenic stressors (e.g., fishing, mineral mining, oil and gas extraction) to further impact deep-seafloor ecosystems and discuss the possible societal implications.

show abstract

Persistence of labile organic matter and microbial biomass in Antarctic shelf sediments: evidence of a sediment food bank

Cited by 167 publications

References 80 publications

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Trophic plasticity of Antarctic echinoids under contrasted environmental conditions

Major impacts of climate change on deep-sea benthic ecosystems

Contact Info

Product

Resources

About

Persistence of labile organic matter and microbial biomass in Antarctic shelf sediments: evidence of a sediment food bank

Cited by 167 publications

References 80 publications

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Trophic plasticity of Antarctic echinoids under contrasted environmental conditions

Major impacts of climate change on deep-sea benthic ecosystems

Contact Info

Product

Resources

About

Persistence of labile organic matter and microbial biomass in Antarctic shelf sediments: evidence of a sediment food bank