Long-term changes in the benthic community on the coastal shelf of Palos Verdes, Southern California

Stull, Janet K.; Haydock, Charles; Smith, Robert W.; Montagne, David E.

doi:10.1007/bf00392606

Cited by 61 publications

(30 citation statements)

References 22 publications

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“…Roper et al 1989) or Principal Coordinates Analysis (e.g. Stull et al 1986), most authors have preferred multidimensional scaling (MDS; e.g. Gray et al 1988, Austen et al 1989, Zenetos & Papathanassiou 1989, Gray et al 1990, Agard et al 1993.…”

Section: Introductionmentioning

confidence: 99%

Effect of reducing taxonomic resolution on ordinations to detect pollution-induced gradients in macrobenthic infaunal assemblages

Vanderklift¹,

Tj²,

Jacoby³

1996

Mar. Ecol. Prog. Ser.

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Researchers often encounter taxonomic problems when analysing data on changes in macrobenthic assemblages due to pollutlon. In response, some authors have suggested that data at famlly and even phylum level may be sufficient to detect such changes. This hypothesis is commonly tested by visual comparisons of ordinabon plots generated by multidimensional scaling (MDS). Our study assessed this approach using a dataset previously shown to contain patterns in species composition that were related to both habitat type and heavy metal pollution. These data allow us to assess the ability of analyses at reduced taxonomic resolutions to detect 'signals' associated with pollution gradients among the 'noise' associated with habitat gradients. Such situations will arise in most studies of the impacts of pollutlon on inshore macrobenthic assemblages. The patterns associated with both habitat and pollution gradients were visible in ordlnations based on data pooled to hlgher taxonomic levels. The similarity among ordinations based on different sets of pooled data was not fully supported by more detailed analyses. Changing the number of dimensions in ordinations, the taxonomic resolution, the attribute:object ratio and the non-zeros ratio of datasets all affected the matrlx of association measures and the results of ordinations and Procrustes rotations. The effects of these changes were complex. Further work is needed to determine the likely effect of using data with reduced taxonomic resolution affect to detect impacts.

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Section: Introductionmentioning

confidence: 99%

Effect of reducing taxonomic resolution on ordinations to detect pollution-induced gradients in macrobenthic infaunal assemblages

Vanderklift¹,

Tj²,

Jacoby³

1996

Mar. Ecol. Prog. Ser.

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“…, Dorjes et al 1986, Beuken~a 1989, 1992, El Nino events (Tarazona et al 1988), as well as the highly variable success or fail.ure of larval settlement and post-settlement survival of recruits (e.g. Davis & VanBlaricom 1978, Stull et al 1986. Given this potential for disturbance to influence the stability of macrobenthic communities, the identification of temporally consistent patterns is important, not only in addressing issues fundamental to ecology, but also for the conservation and management of coastal resources.…”

Section: Introductionmentioning

confidence: 99%

Are soft-sediment communities stable? An example from a windy harbour

Turner¹,

Thrush²,

Pridmore³

et al. 1995

Mar. Ecol. Prog. Ser.

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The macrobenthic soft-sediment communities at 6 sites in Manukau Harbour, New Zealand, have been quant~tahvely sampled at bimonthly intervals since October 1987. Univariate (contingency-table analysis, Kendall's coefficient of concordance and Jaccard's similarity index) and multivariate (non-metric multi-dimensional scaling and canonical con~munity ordination) analyses were used to assess the absolute and relative structural stability of the communities a t each of the 6 sites over the first 5 % yr of sampling. Despite short-term, seasonal and inter-annual variability, the communities have generally been persistent, in terms of their overall community structure, over the duration of the sampling programme. h4anukau Harbour is a dynamic and rigorous environment in terms of movement of water and sediments. Mean wind c o n d~t~o n s were found to play an important role in contnbuting to variability in comn~unity structure at different sites in the Harbour, probably as a result of s e h m e n t disturbance by wind-induced waves and bottom turbulence. In addition to local factors, there was also evidence that factors operating at harbour-wide scales (e.g. water temperature) contributed to variability in community structure. The populations of some species exhibited marked temporal fluctuations. Major recruitment events potentially lead to altered physical, chemical or biological characteristics of the benthic habitat with concomitant effects on other species in the community. Despite the physically and biologically dynamic environment, the communities were persistent and exhibited both resistance? and resilience to physical disturbance and major recruitment events. Other studies have reported these to b e important factors contributing to instability in the structure of soft-sediment communities.

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“…Although Ferraro and Cole (1990) indicated that the species level would be most sensitive for the evaluation of pollution impacts, variations in abundance of macrobenthic species in response to small perturbations may be hard or impossible to detect due to the large range of variability (Stull et al 1986). …”

Section: Discussionmentioning

confidence: 99%

Monitoring of marine benthic communities and taxonomic resolution: an approach through diverse habitats and substrates along the Southern Iberian coastline

Sánchez-Moyano

Estacio

et al. 2006

Helgol Mar Res

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Studies conducted along the southern Iberian coastline validate macrobenthic community analyses at taxonomic levels higher than that of species. Twelve studies on littoral benthic communities, carried out by the same research team, were selected spanning both a variety of sampling strategies (spatial, temporal, spatiotemporal) and substrate/habitat types (sediment, rock, algae). In order to establish differences between the results obtained at the taxonomic levels of species, family and order, similarities among stations were calculated using Spearman's coefficient for ranges. A subset of three studies was selected to investigate possible differences in 'best-explaining' environmental variables with taxonomic level. The environmental variables selected at species level were the same as those found at levels of family and order. It is concluded that studies at the different levels of taxonomic resolution (species, family, order) lead to similar results both with regard to relative community distributions and the environmental variables associated with these. The importance of this result for monitoring similar benthic communities is discussed.

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Long-term changes in the benthic community on the coastal shelf of Palos Verdes, Southern California

Cited by 61 publications

References 22 publications

Effect of reducing taxonomic resolution on ordinations to detect pollution-induced gradients in macrobenthic infaunal assemblages

Effect of reducing taxonomic resolution on ordinations to detect pollution-induced gradients in macrobenthic infaunal assemblages

Are soft-sediment communities stable? An example from a windy harbour

Monitoring of marine benthic communities and taxonomic resolution: an approach through diverse habitats and substrates along the Southern Iberian coastline

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