Re-evaluation of species diversity patterns of free-living marine nematodes

Mokievsky, Vadim; Azovsky, Andrey I.

doi:10.3354/meps238101

Cited by 55 publications

(45 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2009). For nematodes, the results are equivocal, and whether latitude or depth primarily determines the observed patterns is a matter of discussion (Lambshead et al 2000, Mokievsky & Azovsky 2002, Lambshead & Boucher 2003. For example, compilation of the published data did not reveal any prominent latitudinal gradients for shallow water free-living marine nematodes in the southern hemisphere, whereas the samples collected specifically along the coast of Chile between 18 and 42°S showed that sandy beach nematode fauna follows the classic latitudinal gradient (Boucher 1990, Lee & Riveros 2011.…”

mentioning

confidence: 87%

“…These findings may also shed some light on the 'latitude or depth' discussion related to the leading gradients in meiofaunal diversity (Lambshead et al 2000, Mokievsky & Azovsky 2002. Both factors are important but affect different diversity components, and the relative importance of latitude drops but that of depth increases in the deepest areas.…”

Section: Relative Role Of Diversity Componentsmentioning

confidence: 98%

“…For example, compilation of the published data did not reveal any prominent latitudinal gradients for shallow water free-living marine nematodes in the southern hemisphere, whereas the samples collected specifically along the coast of Chile between 18 and 42°S showed that sandy beach nematode fauna follows the classic latitudinal gradient (Boucher 1990, Lee & Riveros 2011. The wider inter-regional comparisons, however, did not show obvious latitudinal trends in nematode α diversity, in contrast to macrofauna (Vanhove et al 1999, Mokievsky & Azovsky 2002, Muthumbi et al 2004). Harpacticoids, aside from nematodes, are ubiquitous and often the most abundant component of marine meiofauna (Giere 2009).…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 98%

“…The results of a deepsea Medi terranean meiofauna analysis (Gambi et al 2010) suggested that the observed richness variability was explained mainly by the geographical position of the sampling sites (latitude and longitude, cumulatively 42%) at 200 to 1000 m depths, whereas deeper (> 2000 m), food sources explained 37% of the variance. As Mokievsky & Azovsky (2002) demonstrated using a large-scale dataset, the nematode species richness in a biotope (or α diversity) is approximately twice as high in the deep sea (deeper than 400 m), while the main source of diversity in shallow waters is high species turnover (β diversity) due to the heterogeneity of biotopes. Nematodes from the equatorial central Pacific also show higher regional diversity in coastal waters due to high species turnover, despite lower sample diversity in coastal waters than in the deep sea (Lambshead & Boucher 2003).…”

mentioning

confidence: 94%

See 3 more Smart Citations

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

Azovsky¹,

Garlitska²,

Chertoprud³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

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...

show abstract

mentioning

confidence: 87%

Section: Relative Role Of Diversity Componentsmentioning

confidence: 98%

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 98%

mentioning

confidence: 94%

See 2 more Smart Citations

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

Azovsky¹,

Garlitska²,

Chertoprud³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…There have been many studies investigating diversity patterns, with special emphasis on how biodiversity varies with depth and latitude (Mokievsky & Azovsky 2002;Gage et al 2004;Renaud et al 2009), most of which have identified an increase in diversity with water depth through the bathyal zone (Rex 1981;Levin et al 2001). On the other hand, the latitudinal gradient in species richness is a well-known biogeographical pattern in terrestrial ecology, where there is an observed increase in species diversity from high to low latitudes (from the poles to the tropics) (Pianka 1966;Gray et al 1997;Gaston & Blackburn 2000).…”

Section: Introductionmentioning

confidence: 99%

Regional patterns of continental shelf polychaete diversity: examples for the North Sea, English Channel, Irish Sea and Outer Bristol Channel areas

Quiroz‐Martínez

Schmitt

Dauvin

et al. 2011

Italian Journal of Zoology

View full text Add to dashboard Cite

Polychaetes are a well-represented group in most marine and estuarine environments, both in terms of number of individuals and species; they typically constitute a significant percentage of the total macrofaunal diversity. The aim of our analyses was to characterise the biodiversity and regional distribution patterns of polychaete assemblages from the continental shelf (0-200 m) of the North Sea, English Channel and Irish Sea. Variations in depth and local distribution of sediment types, amongst other environmental factors, are the main factors affecting the pattern of distribution of benthic polychaetes. Here we applied and compared different approaches to draw the diversity pattern of this marine invertebrate group on a regional biogeographical scale, and to identify the main factors structuring these patterns.

show abstract

Latitudinal variation in nematode diversity and ecological roles along the Chinese coast

Chen

Zhang

2016

Ecology and Evolution

View full text Add to dashboard Cite

AimTo test changes in the phylogenetic relatedness, niche breadth, and life‐history strategies of nematodes along a latitudinal gradient.LocationSixteen wetland locations along the Pacific coast of China, from 20°N to 40°N.MethodsLinear regression was used to relate nematode phylogenetic relatedness (average taxonomic distinctness (AvTD) and average phylogenetic diversity [AvPD]), life‐history group (based on “c‐p” colonizer–persister group classification), and dietary specificity (based on guild classification of feeding selectivity) to latitude.ResultsWetland nematode taxonomic diversity (richness and Shannon diversity indices) decreased with increasing latitude along the Chinese coast. Phylogenetic diversity indices (AvTD and AvPD) significantly increased with increasing latitude. This indicates that at lower latitudes, species within the nematode community were more closely related. With increasing latitude, the nematode relative richness and abundance decreased for selective deposit feeders but increased for nonselective deposit feeders. The proportion of general opportunists decreased with increasing latitude, but persisters showed the opposite trend. The annual temperature range and the pH of sediments were more important than vegetation type in structuring nematode communities.Main conclusionNematode niche breadth was narrower at lower latitudes with respect to dietary specificity. Higher latitudes with a more variable climate favor r over K life‐history strategists. Nematode communities at lower latitudes contained more closely related species.

show abstract

Re-evaluation of species diversity patterns of free-living marine nematodes

Cited by 55 publications

References 34 publications

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

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

Regional patterns of continental shelf polychaete diversity: examples for the North Sea, English Channel, Irish Sea and Outer Bristol Channel areas

Latitudinal variation in nematode diversity and ecological roles along the Chinese coast

Contact Info

Product

Resources

About