Further evidence for the effect of particle-size diversity on deep-sea benthic biodiversity

Leduc, Daniel; Rowden, Ashley A.; Probert, P. Keith; Pilditch, Conrad A.; Nodder, Scott D.; Vanreusel, Ann; Duineveld, G.C.A.; Witbaard, Rob

doi:10.1016/j.dsr.2011.10.009

Cited by 58 publications

(50 citation statements)

References 51 publications

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“…However, since taxonomic distinctness may be governed by a variety of factors, such as biogeography, environmental factors, habitat characteristics, and stress (Bevilacqua et al, 2012;Leira et al, 2009;Mouillot et al, 2005;Clarke, 1995, 1998;Xu et al, 2011), more research into life history strategies, niche requirements and taxon interactions are needed to fully understand the patterns observed here. Unlike Leduc et al (2011) (nematode species and genera) and Etter and Grassle (1992) (macrofaunal species), we did not detect an effect of sediment heterogeneity (SED) on nematode genus diversity. We did, however, observe that more heterogeneous sediments harboured nematode assemblages with a higher taxonomic breadth, and possibly a higher functional divergence.…”

Section: Environmental Drivers Of Nematode Diversitycontrasting

confidence: 90%

“…The higher habitat heterogeneity may favour the co-existence of more taxonomically dissimilar taxa, with their distinct specific niche requirements. Possibly, the high genus diversity observed by Leduc et al (2011) coincided with high taxonomic distinctness. Leduc et al (2011) found no effect of SED on nematode trophic diversity (TD), whereas we uncovered an inverse relationship between SED and TD.…”

Section: Environmental Drivers Of Nematode Diversitymentioning

confidence: 99%

“…Possibly, the high genus diversity observed by Leduc et al (2011) coincided with high taxonomic distinctness. Leduc et al (2011) found no effect of SED on nematode trophic diversity (TD), whereas we uncovered an inverse relationship between SED and TD. It should be stressed that the trends described here do not imply causal relationships, and that the decrease in nematode trophic diversity with increasing SED may be driven by a confounding, unmeasured environmental factor (e.g.…”

Section: Environmental Drivers Of Nematode Diversitymentioning

confidence: 99%

“…Sediment particle size diversity (SED) was computed as the Shannon-Wiener diversity index based on the percent dry weight of 10 particle size classes (i.e. < 4, 4-38, 38-63, 63-125, 125-250, 250-500, 500-800, 800-1000, 1000-1600, > 1600 µm) (Etter and Grassle, 1992;Leduc et al, 2011). The seasonal variability in surface primary productivity (SVI) was calculated as the coefficient of variation (i.e.…”

Section: Environmental Variablesmentioning

confidence: 99%

“…Seasonality in surface productivity had an adverse effect on foraminiferal species diversity in abyssal sediments (Corliss et al, 2009;Gooday et al, 2012). The diversity of sediment particles, which can be regarded as a measure of habitat heterogeneity, has a positive influence on macrofaunal (Etter and Grassle, 1992) and nematode (Leduc et al, 2011) species diversity in the western North Atlantic and in the Pacific Ocean, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Unravelling the environmental drivers of deep-sea nematode biodiversity and its relation with carbon mineralisation along a longitudinal primary productivity gradient

Pape¹,

Bezerra²,

Jones

et al. 2013

Biogeosciences

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Alongside a primary productivity gradient between the Galicia Bank region in the Northeast Atlantic and the more oligotrophic eastern Mediterranean Basin, we investigated the bathymetric (1200–3000 m) and longitudinal variation in several measures for nematode taxon (Shannon–Wiener genus diversity, expected genus richness and generic evenness) and functional diversity (trophic diversity, diversity of life history strategies, biomass diversity and phylogenetic diversity). Our goals were to establish the form of the relation between diversity and productivity (measured as seafloor particulate organic carbon or POC flux), and to verify the positive and negative effect of sediment particle size diversity (SED) and the seasonality in POC flux (SVI), respectively, on diversity, as observed for other oceanographic regions and taxa. In addition, we hypothesised that higher taxon diversity is associated with higher functional diversity, which in turn stimulates nematode carbon mineralisation rates (determined from biomass-dependent respiration estimates). Taxon diversity related positively to seafloor POC flux. Phylogenetic diversity (measured as average taxonomic distinctness) was affected negatively by the magnitude and variability in POC flux, and positively by SED. The latter also showed an inverse relation with trophic diversity. Accounting for differences in total biomass between samples, we observed a positive linear relation between taxon diversity and carbon mineralisation in nematode communities. We could, however, not identify the potential mechanism through which taxon diversity may promote this ecosystem function since none of the functional diversity indices related to both diversity and nematode respiration. The present results suggest potential effects of climate change on deep-sea ecosystem functioning, but further also emphasise the need for a better understanding of nematode functions and their response to evolutionary processes

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Section: Environmental Drivers Of Nematode Diversitycontrasting

confidence: 90%

Section: Environmental Drivers Of Nematode Diversitymentioning

confidence: 99%

Section: Environmental Drivers Of Nematode Diversitymentioning

confidence: 99%

Section: Environmental Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Unravelling the environmental drivers of deep-sea nematode biodiversity and its relation with carbon mineralisation along a longitudinal primary productivity gradient

Pape¹,

Bezerra²,

Jones

et al. 2013

Biogeosciences

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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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High resilience of harpacticoid copepods in the landward slope of the Japan Trench against disturbance of the 2011 Tohoku Earthquake

Kitahashi

Jenkins

Kojima

et al. 2018

Limnology & Oceanography

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On 11 March 2011, an earthquake of magnitude Mw 9.0 known as “the 2011 off the Pacific coast of Tohoku Earthquake” occurred off the coast of Miyagi Prefecture. To assess the effect of the earthquake on the deep‐sea ecosystem, we compared harpacticoid assemblages at six stations (100–6000 m water depth) in the landward slope of the Japan Trench off Sanriku in northeastern Japan. We collected samples at the same locations after 4.5 months (2011) and 1.5 yr (2012) after the earthquake. There were no significant differences in depth‐related patterns of harpacticoid assemblages in terms of diversity and community composition between 2011 and 2012. Changing patterns of harpacticoid community composition along water depth in the Sanriku region after the earthquake did not significantly differ from those in the reference region (Kuril region, 500 km away from the Sanriku region, Japan). Our results suggest that the harpacticoid assemblage at the Sanriku region was not affected by the earthquake or that it quickly recovered after the event. Around our study area, large earthquakes have occurred at 500‐yr intervals on average. The observed high resilience of harpacticoid assemblages against the earthquake suggest that benthos with high resilience against disturbance are dominant under a situation in which large disturbances occur every 500 yr or more.

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Further evidence for the effect of particle-size diversity on deep-sea benthic biodiversity

Cited by 58 publications

References 51 publications

Unravelling the environmental drivers of deep-sea nematode biodiversity and its relation with carbon mineralisation along a longitudinal primary productivity gradient

Unravelling the environmental drivers of deep-sea nematode biodiversity and its relation with carbon mineralisation along a longitudinal primary productivity gradient

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

High resilience of harpacticoid copepods in the landward slope of the Japan Trench against disturbance of the 2011 Tohoku Earthquake

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