Neutral modelanalysis of patterns of marine benthic species diversity

Piatt, HM; Lambshead, P. J. D.

doi:10.3354/meps024075

Cited by 38 publications

(16 citation statements)

References 12 publications

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“…Several factors have been proposed to account for observed vertical patterns including species interaction, differential response to geochemical properties of the sediment, resource partitioning or active avoidance of predation (e.g. Jensen, 1981Jensen, , 1987Joint et al, 1982;Bouwman et al, 1984;Platt & Lambshead, 1985;Ó lafsson, 1992;Giere, 1993;Hendelberg & Jensen, 1993;Soetaert et al, 1994;Modig & Ó lafsson, 1998;Steyaert et al, 1999;Wetzel et al, 2002).…”

Section: Introductionmentioning

confidence: 97%

Laboratory experiments on the infaunal activity of intertidal nematodes

et al. 2005

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The impact of oxygen on the vertical distribution of an intertidal nematode community was investigated in a manipulation experiment with sediments collected from the Oosterschelde (The Netherlands). The vertical distribution of nematodes was examined in response to sediment inversion in perspex cores with or without the presence of an air-flushed silicone tube introducing oxygen to the bottom sediment layer. Following an incubation of 1 week, peak densities of nematodes were recorded in the deep layers of the sediment in cores with subsurface oxygenation. In contrast, this concentration of nematodes was absent in the cores that lacked bottom oxygenation and the majority of the total assemblage was still located in anoxic sediment layers. This suggests that oxidised sediments with traces of oxygen represent favourable conditions for nematodes and indicates that these nematodes are tolerant to short-term anoxia and burial. Observations on the species level suggest that oxygenation, primarily through its direct impact on geochemical properties of the sediment, may be an important factor governing the subsurface activity of nematodes.

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Section: Introductionmentioning

confidence: 97%

Laboratory experiments on the infaunal activity of intertidal nematodes

et al. 2005

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“…Recently the non-equilibrium diversity theories of Connell (1978) and Huston (1979) have been used to explain variations in species diversity in meiofaunal assemblages (Platt & Lambshead 1985, Warwick et al 1986). The hypothesis predicts that under low frequency and intensity of disturbance diversity is low due to competitive exclusion, while intermediate disturbance yields high diversity by preventing competition leading to exclusion of species.…”

Section: Introductionmentioning

confidence: 99%

Effects of macroepifauna on developing nematode and harpacticoid assemblages in a subtidal muddy habitat

Ólafsson¹,

Moore²

1992

Mar. Ecol. Prog. Ser.

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In order to assess the effects of macrofauna on meiofaunal community structure, field investigations were performed in a low energy subtidal muddy sediment in Loch Creran, a sea-loch on the west coast of Scotland. Meiofaunal colonization of azoic sediment was studied in cages designed to exclude macrofauna to varying degrees. In all the cages high diversity assemblages developed rapidly. Considerable variation in species composition was found, both for nematodes and harpacticoids, and no indication that exclusion of the macrofauna was influencing the early colonizing individuals. For the harpacticoid species the results from multivariate analyses indicated a strong successional pattern inside the cages. However such a pattern was not obvious for the nematode component of the meiofauna. The semi-pelagic harpacticoid copepod Longipedia helgolandica became extremely abundant inside the cages, while it was hardly found in the background sediment. The initial colonization by most of the harpacticoids was marked by a high proportion of copepodites. The exclusion of macroepifauna did not result in a simpler meiofaunal community as one would expect i f suppression of dominant competitive relationships by macroepifauna occurred. This study emphasizes the complexity of the community organization, where multitrophic relationships may be of vital importance as factors influencing community structure.

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“…The community data were analysed for signs of stress using 3 separate methods: abundance biomass comparisons (ABC) (Warwick 1986), log-normal plots (Gray & Pearson 1982) and the Ewens-Caswell neutral model (Platt & Lambshead 1985, Lambshead & Platt 1988. Three methods were used as recent studies have suggested that interpretations based on more than 1 method may be more reliable, as each has been demonstrated to provide equivocal results under certain conditions (Dauer et al 1993, Warwick 1993, Smith 1994, Warwick & Clarke 1994.…”

Section: Methodsmentioning

confidence: 99%

Effects of the 'Nella Dan' oil spill on the fauna of Durvillaea antarctica holdfasts

Smith¹,

Simpson²

1995

Mar. Ecol. Prog. Ser.

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The effects of a small spill of light marine diesel on the community structure of invertebrates inhabiting Dumillaea antarctica holdfasts were examined for samples taken from sites which received heavy, moderate and no oiling at Macquarie Island, sub-Antarctic. Non-metr~c inultidimensional scaling (MDS) at both the species and a mixed taxonomic level separated samples collected at oiled sites from the controls. Pre-impact data were only available for 1 of the heavily oiled sites and these samples grouped with those from control sites in MDS analysis. Holdfasts from oiled sites were characterised by heavy sediment loads, a dominance of capitellid, cirratulid and splonid polychaetes and the rarity of the isopod Limnoria stephenseni. In contrast, samples from the control sites were dominated by peracarid crustaceans and in particular by the herbivorous isopod L. stephenseni. Analysis of differences In the size distribution patterns of the 4 most common species (the isopod L. stephenseni, the amphipods Parawaldeckia kidderi and Hyale novaezealandiae and the gastropod Laeviljtto~-jna caliginosa) suggests that impacts occurred across all sizes for L, stephenseni and P kjdderi. At the heavily oiled sites, size distribution patterns for the gastropod L. caliginosa were skewed towards larger individuals, suggesting a differential mortality of smaller individuals. We suggest that the rarity of L. stephenseni at the oiled sites may result in the accumulation of sediment within the internal chambers of the holdfast, producing a habitat more suitable for polychaete worms. The residual levels of hydrocarbons within these sediments may further restrict the polychaete species to opportunistic taxa which were not found at the control sites. As this study did not include pre-impact sampling, the interpretation of the results is partially confounded with possible, unmeasured, preexisting site-specific differences in the community structure. While the availability of pre-impact data from 1 oiled site (from an earlier study) has strengthened interpretation with respect to possible oil effects, further sampling of the sites 1s needed to resolve some of these uncertainties.

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Neutral modelanalysis of patterns of marine benthic species diversity

Cited by 38 publications

References 12 publications

Laboratory experiments on the infaunal activity of intertidal nematodes

Laboratory experiments on the infaunal activity of intertidal nematodes

Effects of macroepifauna on developing nematode and harpacticoid assemblages in a subtidal muddy habitat

Effects of the 'Nella Dan' oil spill on the fauna of Durvillaea antarctica holdfasts

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