Quantifying disturbances in benthic communities—comparison of the community disturbance index (CDI) to other multivariate methods

Flåten, Geir Rune; Botnen, H.; Grung, Bjørn; Kvalheim, Olav M.

doi:10.1016/j.ecolind.2006.02.001

Cited by 18 publications

(9 citation statements)

References 20 publications

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“…Since this index is based on the relative proportion of sensitive/tolerant taxa, the assignment of dominant species to one of the five ecological groups constitutes a prerequisite for the adequate evaluation of ecosystems, as described by Bigot et al (2008). However, appropriate assignments are neither necessarily available (Flaten et al, 2007; Muniz et al, Table 6 Indicator Value (IndVal) coefficient for significant species related to the categorical groups. Bold taxa represented reviewed in EG assignments in relation to the AZTI database, N.a.…”

Section: Discussionmentioning

confidence: 98%

Macrobenthic community for assessment of estuarine health in tropical areas (Northeast, Brazil): Review of macrofauna classification in ecological groups and application of AZTI Marine Biotic Index

Valença

Santos

2012

Marine Pollution Bulletin

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Section: Discussionmentioning

confidence: 98%

Macrobenthic community for assessment of estuarine health in tropical areas (Northeast, Brazil): Review of macrofauna classification in ecological groups and application of AZTI Marine Biotic Index

Valença

Santos

2012

Marine Pollution Bulletin

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“…Usually, benthic macrofauna and/or meiofauna is used to monitor drill mud disposal (e.g. Davies et al, 1984;Dicks et al, 1988;Gray et al, 1990;Daan et al, 1994;Olsgard and Gray, 1995;Shimmield et al 2000;Gage, 2001;Grant and Briggs, 2001;Borja et al, 2003;Breuer et al, 2004;Dalmazzone et al, 2004;Durrieu and Bouzet, 2004;Muxika et al, 2005;Gass and Roberts, 2006;Flaten et al, 2007;Olsen et al, 2007). The distributional patterns of macrofauna and meiofauna around oil drilling platforms resemble the patterns found around other point sources of pollution (Dalmazzone et al, 2004;Parr et al, 2007;Schaanning et al, 2008;Venturini et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Comparison of benthic foraminifera and macrofaunal indicators of the impact of oil-based drill mud disposal

Denoyelle

Jorissen

Martín

et al. 2010

Marine Pollution Bulletin

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We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off Congo. The most polluted sites are characterized by poor faunas, dominated by some very tolerant taxa. Slightly further from the disposal site, there is an area with strongly increased densities, heavily dominated by opportunistic taxa. Still further, macrofauna appears to be similar to that at the reference area, but the foraminiferal meiofauna still suggests a slight environmental perturbation. The foraminiferal FIEI index, based on the species distribution in the study area, appears to be more discriminative than the macrofaunal ITI index, based on a priori definitions of the trophic guilds of the various taxa. Our comparative approach allows us to point out the benefits of (1) the use of macrofauna and foraminifera together and (2) the definition of the species groups used in biotic indices on the basis of observations made directly in the study area.

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“…In the last decennia several methods for monitoring the impact of drill cuttings contamined with oil-based drilling fluids on the benthic ecosystem in open marine environments have been developed (e.g. Davies et al, 1984;Dicks et al, 1988;Gray et al, 1990;Daan et al, 1994;Olsgard and Gray, 1995;Shimmield et al 2000;Gage, 2001;Grant and Briggs, 2001;Borja et al, 2003;Breuer et al, 2004;Dalmazzone et al, 2004;Durrieu and Bouzet, 2004;Muxika et al, 2005;Gass and Roberts, 2006;Flaten et al, 2007;Olsen et al, 2007). These methods are based on the analysis of benthic meiofauna and macrofauna, on the physico-chemical analysis of the sediment and/or on ecotoxicological tests on macrofauna, such as molluscs, annelids, crustaceans or nematodes.…”

Section: Introductionmentioning

confidence: 99%

Impact of oil-based drill mud disposal on benthic foraminiferal assemblages on the continental margin off Angola

Jorissen

Bicchi

Duchemin

et al. 2009

Deep Sea Research Part II: Topical Studies in Oceanography

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In order to assess the possible environmental impact of oily cuttings discharged during oil exploration activities, we studied the benthic foraminiferal faunas in a five-station, 4-km-long sampling transect around a cuttings disposal site at about 670 m depth offshore Angola (W Africa), where drilling activities started 1.5 years before sampling. Living (Rose Bengal stained) and dead foraminiferal faunas were sampled in March 2006. The faunal patterns mirror the spatial distribution of hydrocarbons, which are dispersed into a southeastern direction. Four different areas can be distinguished on the basis of the investigated faunal parameters (density, diversity and species composition of the living fauna, and comparison with subrecent dead faunas). The fauna at station S31, 300 m SE of the oil cuttings disposal site, appears to be clearly impacted: the faunal density and diversity are maximal, but evenness is minimal. Taxa sensitive to organic enrichment, such as Uvigerina peregrina, Cancris auriculus and Cribrostomoides subglobosus, have largely disappeared, whereas the low-oxygen-resistant taxon Chilostomella oolina and opportunistic buliminids and bolivinids attain relatively high densities. At station S32, 500 m SE of the disposal site, environmental impact is still perceptible. The faunal density is slightly increased, and U. peregrina, apparently the most sensitive species, is still almost absent. The faunas found at 1 and 1.8 km SE of the disposal site are apparently no longer impacted by the drill mud disposal. Faunal density and diversity are low, and the faunal composition is typical for a mesotrophic to eutrophic upper slope environment. Finally, Station S35, 2 km NW of the disposal site, contains an intermediate fauna, where both the lowoxygen-resistant C. oolina and the more sensitive taxa (U. peregrina, C. auriculus and C. subglobosus) are present. All taxa live close to the sediment-water interface here, indicating a reduced oxygen penetration into the sediment. Since the hydrocarbon concentration is low at this station, it appears that the faunal characteristics are the consequence of a slightly different environmental setting, and not due to a contamination with drill cuttings. Our data underline the large potential of benthic foraminifera as bio-indicators of anthropogenic enrichment in open marine settings, such as caused by the disposal of oily drill cuttings. The foraminiferal faunas react essentially by a density increase of a number of tolerant and/or opportunistic taxa, and a progressive disappearance of more sensitive taxa in the most impacted area. Rather surprisingly, large-sized taxa appear to be more sensitive than small-sized foraminiferal taxa.

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Quantifying disturbances in benthic communities—comparison of the community disturbance index (CDI) to other multivariate methods

Cited by 18 publications

References 20 publications

Macrobenthic community for assessment of estuarine health in tropical areas (Northeast, Brazil): Review of macrofauna classification in ecological groups and application of AZTI Marine Biotic Index

Macrobenthic community for assessment of estuarine health in tropical areas (Northeast, Brazil): Review of macrofauna classification in ecological groups and application of AZTI Marine Biotic Index

Comparison of benthic foraminifera and macrofaunal indicators of the impact of oil-based drill mud disposal

Impact of oil-based drill mud disposal on benthic foraminiferal assemblages on the continental margin off Angola

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