Effects of Taphonomy and Habitat on the Record of Benthic Foraminifera in Modern Sediments

Denne, Richard A.; Gupta, Barun K. Sen

doi:10.2307/3514586

Cited by 60 publications

(18 citation statements)

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“…However, in areas with a reasonable sediment accumulation (> 1-2 mmlyear) even integrated variations over time can be detected if the environmental changes have significantly altered the indigenous assemblage composition. Taphonomic processes are also least active in areas of rapid sedimentation, where the bioturbated zone is thin, and under oxygen-deficient conditions (Denne and Sen Gupta, 1989). When, for instance, pulp fibers are added to a system, the physical characteristics of the sediments are altered and physically smaller and surface dwelling animals start to predominate (Pearson and Rosenberg, 1976).…”

Section: Historical Perspectivesmentioning

confidence: 98%

Benthic foraminiferal responses to estuarine pollution; a review

Alve¹

1995

The Journal of Foraminiferal Research

502

265

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Benthic foraminiferal distributions in polluted marine areas have been investigated over the last three to four decades, and several workers have pointed out that they provide one of the most sensitive and inexpensive markers available for indicating deterioration of marginal marine environments. Most investigations have been carried out in temperate regions, in areas exposed to several pollution sources. However, environments characterized by organic waste contamination (e.g., sewage or paper and pulp mills) have been addressed more frequently than areas exposed to oil, thermal and various other kinds of pollution.Among the most abundant species close to many outfall areas in temperate regions are Elphidium excavatum and/or Eggerella advena (NW At1antic)lEggerelloides scabrus (NE Atlantic). The dominant tolerant or opportunistic species seems to depend on local hydrographical properties rather than type of effluent. Increased abundance, due to increased nutrient concentrations and reduced predation and competition, is often recorded in areas having high organic inputs. Such abundance aureoles may be separated from outfall centers by an area of strongly reduced abundance or, in severe cases, by a dead zone. Characteristic features of proximal areas include decreased diversity and increased dominance of tolerant or opportunistic species compared to distal areas. Whether agglutinated or calcareous forms dominate seems to depend on the local hydrography, acidity of the sediment porewater and whether living, dead or total (living + dead) assemblages are considered.

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Section: Historical Perspectivesmentioning

confidence: 98%

Benthic foraminiferal responses to estuarine pollution; a review

Alve¹

1995

The Journal of Foraminiferal Research

502

265

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“…However, studies of detailed changes at different depths in a core can be complicated by taphonomic and diagenetic changes (e.g. DENNE & SEN GUPTA 1989;LOUBERE & GARY 1990). Responses to pollution and environmentally related morphological variations observed in benthic Foraminifera (e.g.…”

Section: Introductionmentioning

confidence: 99%

Benthic foraminiferal response to environmental change in the Skagerrak, northeastern North Sea

Moodley

Troelstra

Weering

1993

Sarsia

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“…The living fauna represents a snapshot in a particular environmental context that may vary considerably over short timescales. Conversely, total assemblages give an averaged picture for a much longer period of time (years to centuries), and their composition has been transformed by taphonomical losses (e.g., Murray and Alve, 1999;Denne and Sen Gupta, 1989;Jorissen and Wittling, 1999). This concerns especially agglutinated taxa, many of which are rapidly decomposed after the death of the organisms (Bizon and Bizon, 1985;Schröder, 1988).…”

Section: Data On Living Faunas Versus Total/dead Faunasmentioning

confidence: 99%

Developing Foram-AMBI for biomonitoring in the Mediterranean: Species assignments to ecological categories

Jorissen

Nardelli

Almogi‐Labin

et al. 2018

Marine Micropaleontology

127

141

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Most environmental bio-monitoring methods using the species composition of marine faunas define the Ecological Quality Status of soft bottom ecosystems based on the relative proportions of species assigned to a limited number of ecological categories. In this study we analyse the distribution patterns of benthic foraminifera in the Mediterranean as a function of organic carbon gradients on the basis of 15 publications and assign the individual species to five ecological categories. Our categories (of sensitive, indifferent and 3rd, 2nd and 1st order opportunists) are very similar to the ecological categories commonly used for macrofauna, but show some minor differences. In the 15 analysed publications, we considered the numerical data of 493 taxa, of which 199 could be assigned. In all 79 taxa were classified as sensitive, 60 as indifferent, 46 as 3rd order, 12 as 2nd order and 2 as 1st order opportunists. The remaining 294 taxa are all accessory, and will only marginally contribute to biotic indices based on relative species proportions. In this paper we wanted also to explain the methodology we used for these species assignments, paying particular attention to all complications and problems encountered. We think that the species list proposed here will constitute a highly useful tool for foraminiferal bio-monitoring of soft bottoms in the Mediterranean Sea, which can be used in different ecological indices (Foram-AMBI and similar methods). With additional information becoming available in the next few years, it will be possible to expand the list, and, if necessary, to apply some minor corrections. As a next step, we intend to test this species list using several biotic indices, in a number of independent data sets, as soon as these will become available.

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Effects of Taphonomy and Habitat on the Record of Benthic Foraminifera in Modern Sediments

Cited by 60 publications

References 0 publications

Benthic foraminiferal responses to estuarine pollution; a review

Benthic foraminiferal responses to estuarine pollution; a review

Benthic foraminiferal response to environmental change in the Skagerrak, northeastern North Sea

Developing Foram-AMBI for biomonitoring in the Mediterranean: Species assignments to ecological categories

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