The influence of changing food supply on the lipid biochemistry of deep-sea holothurians

Neto, Renato Rodrigues; Wolff, George A.; Billett, David; Mackenzie, Karen L.; Thompson, A.

doi:10.1016/j.dsr.2005.12.001

Cited by 40 publications

(31 citation statements)

References 35 publications

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“…The present study supports previous observations that in many oceanic areas there is not a consistent food supply to the deep-sea benthos; compounds essential to the deepsea benthic community vary temporally in their amount and availability within years and between years (Santos et al, 1994;Danovaro et al, 2001;Kiriakoulakis et al, 2001;Witbaard et al, 2001;Neto et al, 2006). 2000) may be attributed to reduced supply, but also to the benthic fauna.…”

Section: Phytopigments In the Phytodetritus And Sedimentsupporting

confidence: 79%

“…The importance of the composition as well as the amount of the OM reaching the deep-sea floor, and its influence on the benthic community, are becoming apparent (Billett et al, this volume;Smith et al, 2001;Wigham et al, 2003a;Hudson et al, 2004;Ruhl & Smith, 2004;Neto et al, 2006). The timing and make-up of the phytoplankton bloom, zooplankton interactions (repackaging and recycling) and the physical dynamics of the water column can all affect the quality and quantity of the seasonal POM flux to the sea floor (Turner, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Sample preparation and analysis of tissue lipids followed the methods described by Neto et al (2006). Gut content lipids were extracted in dichloromethane (DCM): methanol; 9:1 v/v by sonification (30 mins, x3).…”

Section: Lipid Analysismentioning

confidence: 99%

“…Inter-annual variability in the quantity and quality of the flux may drive deep-sea benthic community shifts such as the 'Amperima Event' (Ginger et al, 2001;Hudson et al, 2003;Wigham et al, 2003a;Neto et al, 2006). Therefore, it is important to investigate how changes in both the amount and the composition of OM might affect deep-sea communities.…”

Section: Introductionmentioning

confidence: 99%

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Phytopigments as biomarkers of selectivity in abyssal holothurians; interspecific differences in response to a changing food supply

FitzGeorge-Balfour

Billett

Wolff

et al. 2010

Deep Sea Research Part II: Topical Studies in Oceanography

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suggested by the interspecific differences in holothurian ovarian biochemistry. This may lead to large community changes as seen at the PAP, which can alter the reworking rates of sediment, probably affecting carbon burial. The study also demonstrated that using the presence of biomarkers in gut contents to infer feeding selectivity should be used with caution. Only biomarkers in gut contents that are not present in the tissues of the holothurians (e.g chlorophyll a) should be used to determine their feeding selectivity.

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Section: Phytopigments In the Phytodetritus And Sedimentsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Lipid Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phytopigments as biomarkers of selectivity in abyssal holothurians; interspecific differences in response to a changing food supply

FitzGeorge-Balfour

Billett

Wolff

et al. 2010

Deep Sea Research Part II: Topical Studies in Oceanography

Self Cite

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“…If true, this implies that other species in the food web are forced to live on lower quality detritus. Indeed, Neto et al (2006) reported that other holothurians may switch from labile to less labile detritus or not feed on labile detritus at all. Ramirez-Llodra et al (2005) suggested that holothurians, most notably A. rosea, reduced the availability of trophic resources, leading to a reduction in the reproductive effort of the holothurian Oneirophanta mutabilis.…”

Section: Discussionmentioning

confidence: 99%

Carbon flows in the benthic food web of the Porcupine Abyssal Plain: The (un)importance of labile detritus in supporting microbial and faunal carbon demands

Oevelen

Soetaert

Heip

2012

Limnology & Oceanography

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Carbon flows in the benthic food web of the Porcupine Abyssal Plain (4850 m, northeast Atlantic) were reconstructed using linear inverse modeling based on mass balances of the various compartments, biomass data, carbon flux measurements, physiological constraints, and data from a previously published 13 C-phytodetritus pulse-chase experiment. Food web compartments consisted of bacteria, Foraminifera, three feeding types of nematodes and of macrofauna, and four feeding types of megafauna. Three lability classes of detritus were defined to clarify especially the possible role of labile detritus in this abyssal plain food web. Total detritus inputs to the food web were 0.56 mmol C m 22 d 21 , with only a minor (3.8%) contribution of labile detritus. The dominant pathway in the food web was dissolution of more refractory detritus, uptake by bacteria, and subsequent respiration (0.36 mmol C m 22 d 21 , 80% of the community respiration). Lower contributions to community respiration were found for surface-deposit-feeding macrobenthos (5.6%), Foraminifera (4.9%), predatory macrobenthos (3.8%), and other deposit-feeding macrobenthos (3.1%). Contributions by other benthic compartments were , 1%. 13 C-phytodetritus transfer data strongly constrained the carbon source for bacteria, Foraminifera, and the nematode and macrobenthic compartments. Surprisingly, labile detritus contributed , 5% of the total carbon requirements for all these compartments. Carbon sources were much less constrained for the megabenthic compartments because for these compartments no 13 C pulse-chase data were available. The carbon flow model evidently shows a limited role of labile detritus in the food web.

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Investigating the environmental drivers of deep‐seafloor biodiversity: A case study of peracarid crustacean assemblages in the Northwest Atlantic Ocean

Ashford

Kenny

Froján

et al. 2019

Ecology and Evolution

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The deep‐sea benthos covers over 90% of seafloor area and hosts a great diversity of species which contribute toward essential ecosystem services. Evidence suggests that deep‐seafloor assemblages are structured predominantly by their physical environment, yet knowledge of assemblage/environment relationships is limited. Here, we utilized a very large dataset of Northwest Atlantic Ocean continental slope peracarid crustacean assemblages as a case study to investigate the environmental drivers of deep‐seafloor macrofaunal biodiversity. We investigated biodiversity from a phylogenetic, functional, and taxonomic perspective, and found that a wide variety of environmental drivers, including food availability, physical disturbance (bottom trawling), current speed, sediment characteristics, topographic heterogeneity, and temperature (in order of relative importance), significantly influenced peracarid biodiversity. We also found deep‐water peracarid assemblages to vary seasonally and interannually. Contrary to prevailing theory on the drivers of deep‐seafloor diversity, we found high topographic heterogeneity (at the hundreds to thousands of meter scale) to negatively influence assemblage diversity, while broadscale sediment characteristics (i.e., percent sand content) were found to influence assemblages more than sediment particle‐size diversity. However, our results support other paradigms of deep‐seafloor biodiversity, including that assemblages may vary inter‐ and intra‐annually, and how assemblages respond to changes in current speed. We found that bottom trawling negatively affects the evenness and diversity of deep‐sea soft‐sediment peracarid assemblages, but that predicted changes in ocean temperature as a result of climate change may not strongly influence continental slope biodiversity over human timescales, although it may alter deep‐sea community biomass. Finally, we emphasize the value of analyzing multiple metrics of biodiversity and call for researchers to consider an expanded definition of biodiversity in future investigations of deep‐ocean life.

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The influence of changing food supply on the lipid biochemistry of deep-sea holothurians

Cited by 40 publications

References 35 publications

Phytopigments as biomarkers of selectivity in abyssal holothurians; interspecific differences in response to a changing food supply

Phytopigments as biomarkers of selectivity in abyssal holothurians; interspecific differences in response to a changing food supply

Carbon flows in the benthic food web of the Porcupine Abyssal Plain: The (un)importance of labile detritus in supporting microbial and faunal carbon demands

Investigating the environmental drivers of deep‐seafloor biodiversity: A case study of peracarid crustacean assemblages in the Northwest Atlantic Ocean

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