Latitudinal diversity patterns of deep-sea marine nematodes and organic fluxes: a test from the central equatorial Pacific

Lambshead, P. J. D.; Brown, C. J. D.; Ferrero, T.J.; Mitchell, Nicola J.; Smith, Craig R.; Hawkins, L. E.; Tietjen, John H.

doi:10.3354/meps236129

Cited by 110 publications

(95 citation statements)

References 46 publications

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“….08 ---P = 0.37 P = 0.37 --BD R 2 adj = 0.40 BD 2 : 0.14 LR = 8.21 R 2 m = 0.18 0.09 P < 0.001 P < 0.001 P < 0.01 P < 0.01 had a positive impact on nematode taxon diversity, measured as H and EG (20), consistent with earlier work on polychaetes (Glover et al, 2002) and nematodes (Lambshead et al, 2002) from the abyssal central Pacific. It was shown that seafloor POC flux declines from the Northeast Atlantic to the eastern Mediterranean (not considering seamount station GB1200) and with water depth (Pape et al, 2013), and hence this environmental factor may partly explain the observed bathymetric decline in taxon diversity (see Sect.…”

Section: Environmental Drivers Of Nematode Diversitysupporting

confidence: 79%

“…Deep-sea nematodes are highly diverse (Lambshead and Boucher, 2003), and owing to their omnipresence they can be used to study broad-scale geographic patterns in diversity (Lambshead et al, 2002) as well as the importance of diversity to ecosystem functioning (Danovaro et al, 2008a). Nematodes may influence an important ecosystem function like the bacterial breakdown of organic matter through bioturbation and irrigation (Pike et al, 2001), thereby enhancing nutrient and/or oxygen fluxes (Alkemade et al, 1992;Aller and Aller, 1992), bacterivory (De Mesel et al, 2003) or the provision of optimal growth conditions for bacteria in their mucus trails (Moens et al, 2005;Riemann and Helmke, 2002).…”

Section: E Pape Et Al: Diversity and Function Of Deep-sea Nematodesmentioning

confidence: 99%

“…Deep-sea diversity has been documented to vary positively (Glover et al, 2002; Published by Copernicus Publications on behalf of the European Geosciences Union. Lambshead et al, 2000Lambshead et al, , 2002, negatively (Gooday et al, 2012) or unimodally (Leduc et al, 2012a;McClain et al, 2012;Tittensor et al, 2011) with productivity for different taxa and geographic regions. These differences in diversityproductivity trends may be related to the differential productivity ranges considered (Rex and Etter, 2010).…”

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 Diversitysupporting

confidence: 79%

Section: E Pape Et Al: Diversity and Function Of Deep-sea Nematodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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show abstract

“…Tietjen (1989) and Lambshead et al (2002) reported positive associations of deep-sea nematode richness with the presumed (but unmeasured) levels of seafloor POC fluxes in the northwest Atlantic and central equatorial Pacific, respectively. For abyssal Harpacticoida from the Angola Basin, Rose et al (2005) observed a higher diversity at a site with higher sediment organic content, as a proxy of the overlying productivity.…”

Section: Diversity Measures: Methodological Aspectsmentioning

confidence: 99%

Broad-scale patterns in local diversity of marine benthic harpacticoid copepods (Crustacea)

Azovsky¹,

Garlitska²,

Chertoprud³

2012

Mar. Ecol. Prog. Ser.

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The α and β diversity of benthic harpacticoids were estimated using 103 published datasets from all over the world, with depths ranging from the intertidal zone to 5600 m. α diversity (expected number of species per 100 individuals) was correlated with organic matter flux to the bottom, and this effect was depth-dependent, with the correlation being negative from the shallowest waters up to 33 m and positive in deeper waters. α diversity was also positively correlated with depth itself and depended on the sediment properties and duration of study, but showed no latitudinal trend. β diversity (estimated as the slope of the species accumulation curve) was negatively correlated with latitude and positively correlated with the spatial extent and depth range of sampling. The effect of latitude and extent was mainly pronounced for the intertidal zone, whereas the depth range was the most significant factor in the deep waters. Additionally, β diversity was higher on sands and mixed sediments than on silt or mud. Latitude explained 45% of the β diversity variation in the littoral zone, 18% in the upper sublittoral, and less than 5% in deeper zones. Thus, α and β diversity act as independent and spatially uncorrelated components of overall regional diversity, driven by different mechanisms. Variations in β diversity presumably reflect spatial heterogeneity and form the latitudinal gradient in the shallowest waters. Deeper, trophic conditions play the leading role, and thus α diversity contributes the major proportion of the total diversity variance there and is responsible for the bathymetric gradient.KEY WORDS: Harpacticoida · α diversity · β diversity · Latitude · Depth · Productivity Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 460: [63][64][65][66][67][68][69][70][71][72][73][74][75][76][77] 2012 the equator has been observed for some groups, e.g. foraminiferans (Culver & Buzas 2000) or marine macrobenthos (Rex et al. 1993, Gray 2002. Nevertheless, comprehensive meta-analysis does not show any consistent differences between hemispheres, despite some variations among the oceans (Hillebrand 2004). The strength of the gradient varies systematically with body mass across organism groups, generally decreasing or even vanishing for the smallest organisms (Hillebrand & Azovsky 2001, Hillebrand 2004. For macrofauna, latitudinal patterns are not identical, however. Some of regional studies have failed to detect this pattern (e.g. peaks in diversity at midlatitude in both Atlantic and Pacific gastropods, Roy et al. 1998); or even showed regionally opposite trends (Renaud et al. 2009 and references therein). It is unclear whether these differences are caused by regional peculiarities or by the restricted geographical range of stations sampled (Renaud et al. 2009). Furthermore, regional diversity shows consistently stronger and steeper latitudinal gradients than local (α) diversity (Clarke & Lidgard 2000, Hillebrand 2004, thus posing the question of systematic varia...

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“…The relationship between surface productivity and diversity.-The relationship between productivity and diversity in the deep-sea can be positive, negative, and unimodal depending on the region and group of organisms (Rex et al 2000, Wollenburg and Kuhnt 2000, Lambshead et al 2002, Hunt et al 2005. Levin et al (2001) favor a general unimodal relationship (see also Witman et al 2008), arguing that apparently conflicting results may simply represent ranges of productivity that occupy different segments of a unimodal diversity-productivity relationship.…”

Section: Productivity and Ostracode Diversitymentioning

confidence: 99%

Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

Yasuhara¹,

Cronin²

2008

Ecology

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Abstract. Ostracodes are small, bivalved crustaceans with the finest-scale fossil resolution of any metazoan, rivaled only by the fossil record of the protistan Foraminifera. This article presents a synthesis of the patterns and possible causes of alpha species diversity variation in benthic deep-sea ostracodes at drilling sites in the North Atlantic and Arctic Oceans. Taken together, these sites represent a period of great climatic variability covering the past three million years. Sediment cores taken from the Mid-Atlantic Ridge show a positive correlation between warm temperatures and high species diversity. These Mid-Atlantic Ridge cores, at the same latitude as northern Spain, show the same positive correlation during the last two glacial-interglacial cycles (200-0 ka [thousands of years ago]) as they do during the pre-glacial Pliocene 2.85-2.4 Ma (millions of years ago). This positive correlation is also found in Pliocene cores from the Rockall Plateau, at the same latitude as Ireland. During the last 200 thousand years, however, this correlation is reversed in cores taken from both the Rockall and Iceland Plateaus. The discovery of high diversity during colder periods in recent high-latitude Rockall and Iceland cores seems to be explained by spikes in diversity caused by ice-rafting events, which would not affect the lower-latitude Mid-Atlantic Ridge. The Heinrich ice-rafting events reduce North Atlantic surface temperatures and salinity every ;6-12 ka, dramatically decreasing surface productivity. This increase in diversity during Heinrich events may be explained either by a negative correlation between surface productivity and benthic diversity or by increase in diversity caused by moderate disturbance when ice rafted debris fall to the bottom of the ocean.

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Latitudinal diversity patterns of deep-sea marine nematodes and organic fluxes: a test from the central equatorial Pacific

Cited by 110 publications

References 46 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

Broad-scale patterns in local diversity of marine benthic harpacticoid copepods (Crustacea)

Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

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