Impact of drill cutting releases on benthic foraminifera at three exploration wells drilled between 1992 and 2012 in the SW Barents Sea, Norway

Dijkstra, Noortje; Junttila, Juho; Aagaard-Sørensen, Steffen

doi:10.1016/j.marpolbul.2019.110784

Cited by 3 publications

(1 citation statement)

References 52 publications

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“…The dominance (D) was also determined, taking into consideration that stressed environments may be characterised by assemblages with low diversity and high dominance of one or a few species (Magurran, 2004). Absolute species abundance was standardised with respect to 1 g sediment dry weight (Dijkstra et al, 2020). The census of Brachiopoda species was conducted by picking all specimens (at least 50) from the same sediment aliquot used for BF.…”

Section: Foraminifera and Brachiopoda Studymentioning

confidence: 99%

Benthic foraminifera and brachiopods from a marine cave in Spain: environmental significance

et al. 2020

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Sediment samples from a marine cave in the Murcia region (eastern Spain) were analysed for grain size, total benthic foraminiferaand dead brachiopoda to obtain environmental information through physical and ecological data in order to understandthe benthic communities of cave environments and their ecological significance. A total of 100 foraminiferal and 7 brachiopodspecies were classified, highlighting the first occurrence in the western Mediterranean of Gwynia capsula (Jeffreys, 1859). Statistical analysis applied to foraminiferal data allowed the identification of three assemblages characterised by decreasing species diversity along the cave. This corresponded to a similar separation recognisable through changes in brachiopod species abundance and well-correlated with cave morphology. The relative abundance of epifaunal clinging-attached foraminifera as well as the rate of cave and sciaphilic/coralligenous Brachiopoda, thought to be representative of the degree of separation from marine conditions,were found to be highly correlated, increasing towards the inner cave. Our hypothesis was that despite the different lifestyles ofthese two groups, the strict correlation of environmental factors (i.e. light, nutrients, sediment texture, water parameters) changingalong the length of the cave determines a comprehensive environmental gradient, causing an increase in environmental stress that has similar effects on the different taxonomic groups.

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Section: Foraminifera and Brachiopoda Studymentioning

confidence: 99%