Benthic foraminifera off West Africa (1°N to 32°S): Do live assemblages from the topmost sediment reliably record environmental variability?

Licari, Laëtitia; Mackensen, Andreas

doi:10.1016/j.marmicro.2005.03.001

Cited by 80 publications

(39 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Organic carbon, either fluxes or sedimentary content, is commonly used as an indicator of the trophic state of marine environments (de Rijk et al, 2000;Jorissen et al, 2007;Licari and Mackensen, 2005;Schmiedl et al, 2000).…”

Section: Canyon Versus Open Slope: Benthic Environments As a Functionmentioning

confidence: 99%

See 1 more Smart Citation

Living deep-sea benthic foraminifera from the Cap de Creus Canyon (western Mediterranean): Faunal–geochemical interactions

Contreras-Rosales

Koho

Duijnstee

et al. 2012

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

Section: Canyon Versus Open Slope: Benthic Environments As a Functionmentioning

confidence: 99%

“…Both of them are commonly associated with areas of high organic matter input and dysoxic to anoxic conditions occupying (Chendes et al, 2004;Debanay and Redois, 1997;Jorissen et al, 2007;Licari and Mackensen, 2005;Milker et al, 2009;Mojtahid et al, 2009;Schumacher et al, 2007).…”

Section: Benthic Foraminifera From Eutrophic Environmentsmentioning

confidence: 99%

Living deep-sea benthic foraminifera from the Cap de Creus Canyon (western Mediterranean): Faunal–geochemical interactions

Contreras-Rosales

Koho

Duijnstee

et al. 2012

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

“…Diversities of the benthic foraminiferal assemblages were determined from the Information Function, H, calculated from the PAST software [Hammer et al, 2001] (see at http://palaeo-electronica.org/ 2001_1/past/issue1_01.htm). The use of >63 mm size fraction in the benthic foraminifera analysis does not enable direct comparison with studies of Recent or late Quaternary records of benthic foraminifera from the southern Atlantic Ocean that are mostly based on the analysis of the >125 mm fraction [e.g., Mackensen et al, 1990Mackensen et al, , 1993bMackensen et al, , 1995Licari and Mackensen, 2005]. Studies that use >63 mm size fraction are mainly restricted to the Antarctic continental shelf [e.g., Ishman and Domack, 1994;Murray and Pudsey, 2004;Cornelius and Gooday, 2004].…”

Section: Methodsmentioning

confidence: 99%

“…Cassidulina and Uvigerina species have been also reported as benefiting from phytoplankton blooms (e.g., C. carinata, U. peregrina [Duchemin et al, 2007]) or react quickly to phytodetritus (e.g., C. crassa [Suhr and Pond, 2006] and U. akitaensis [Nomaki et al, 2005]). Melonis barleeanum seems to prefer slightly altered organic matter [Caralp, 1989;Licari and Mackensen, 2005] or bacterial stocks [Fontanier et al, 2005]. All these species together show relatively high abundance ($20%, Figure 2i) during MIS 6, MIS 4, and late MIS 3 suggesting that these periods were characterized by low seasonality and year-round higher supply of organic material in comparison with periods dominated by pulsed deposition rates of food as indicated by high abundance of E. exigua.…”

Section: Pa4218mentioning

confidence: 97%

“…are large shallow infaunal species that have generally been linked to fairly high, continuous food supply with moderate oxygen depletions [Lutze and Coulbourn, 1984;Fariduddin and Loubere, 1997;Mackensen et al, 1993bMackensen et al, , 1995Schönfeld and Altenbach, 2005;Licari and Mackensen, 2005;Hayward et al, 2002Hayward et al, , 2006. Cassidulina and Uvigerina species have been also reported as benefiting from phytoplankton blooms (e.g., C. carinata, U. peregrina [Duchemin et al, 2007]) or react quickly to phytodetritus (e.g., C. crassa [Suhr and Pond, 2006] and U. akitaensis [Nomaki et al, 2005]).…”

Section: Pa4218mentioning

confidence: 99%

See 1 more Smart Citation

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

et al. 2007

View full text Add to dashboard Cite

[1] Benthic foraminiferal assemblages and the carbon isotope composition of the epifaunal benthic foraminifera Epistominella exigua and Fontbotia wuellerstorfi have been investigated along core MD02-2589 located at the southern Agulhas Plateau (41°26.03 0 S, 25°15.30 0 E, 2660 m water depth). This study aims to evaluate changes in the benthic paleoenvironment and its influence on benthic d 13 C with a notable focus on E. exigua, a species associated with phytodetritus deposits and poorly studied in isotope paleoceanographic reconstructions. The benthic foraminiferal assemblages (>63 mm) show large fluctuations in species composition suggesting significant changes in the pattern of ocean surface productivity conceivably related to migrations of the Subtropical Convergence (STC) and Subantarctic Front (SAF). Low to moderate seasonality and relatively higher food supply to the seafloor are indicated during glacial marine isotope stages (MIS) 6, 4, and 2 and during MIS 3, probably associated with the northward migration of the SAF and confluence with the more stationary STC above the southern flank of the Agulhas Plateau. The lowest organic carbon supply to the seafloor is indicated from late MIS 5b to MIS 4 as a consequence of increased influence of the Agulhas Front (AF) and/or weakening of the influence of the STC over the region. Episodic delivery of fresh organic matter, similar to modern conditions at the core location, is indicated during MIS 5c-MIS 5e and at Termination I. Comparison of this paleoenvironmental information with the paired d 13 C records of E. exigua and F. wuellerstorfi suggests that organic carbon offsets d 13 C of E. exigua from ambient bottom water d 13 C DIC , while its d 13 C amplitude, on glacial-interglacial timescales, does not seem affected by changes of organic carbon supply to the seafloor. This suggests that this species calcifies preferentially during the short time span of the year when productivity peaks and phytodetritus is delivered to the seafloor. Therefore E. exigua, while offset from d 13 C DIC , potentially more faithfully records the amplitude of ambient bottom water d 13 C DIC changes than F. wuellerstorfi, notably in settings such as the Southern Ocean that experienced substantial changes through time in the organic carbon supply to the seafloor.Citation: Diz, P., I. R. Hall, R. Zahn, and E. G. Molyneux (2007), Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes, Paleoceanography, 22, PA4218,

show abstract

Impact of organic matter source and quality on living benthic foraminiferal distribution on a river‐dominated continental margin: A study of the Portuguese margin

et al. 2016

View full text Add to dashboard Cite

Living (rose Bengal stained) benthic foraminifera were investigated on surface sediments from 23 stations from the river-dominated northwestern Portuguese margin. Samples were collected in March 2011, following the period of the maximum rainfall over the Iberian Peninsula, between 20 and 2000 m water depth along five cross-margin transects. Four of them are located off the Douro, Mondego, Tagus, and Sado Rivers and one off the Estremadura coast. The major objectives of this study are (1) to assess the impact of organic matter of various origin and quality on the benthic foraminifera and (2) to investigate the spatial differences of faunal distribution from coastal waters to the deep sea under river influences. To do this, sedimentological and biogeochemical characteristics of the sediments were identified by measuring grain size, oxygen penetration depth, total organic carbon (TOC) content, stable carbon isotopic composition of TOC (δ 13 C TOC ) and concentration of pigments and amino acids. Based on the principal component and cluster analyses of the environmental data, three major geographical groups are identified: (1) deep stations, (2) coastal and middle slope stations, and (3) shelf stations under river influence. At the deepest stations, species are associated with high organic matter (OM) quantity but low OM quality, where Uvigerina mediterranea, Hoeglundina elegans, and agglutinated species such as Reophax scorpiurus or Bigenerina nodosaria are dominant. All stations off the Sado River, which is the most affected area by the anthropogenic influence, are also characterized by high quantity but low quality of OM with the minimum faunal density and diversity within the study area. Middle slope stations are associated with low OM content and coarse sediments (Q 50 ) with the predominance of N. scaphum. Shallow shelf stations close to the Douro and Tagus River mouths show a dominance of taxa (e.g., Ammonia beccarii, Bulimina aculeata, Eggerelloides scaber, Nonion scaphum, Cancris auriculus, and Quinqueloculina seminula) adapted to environments characterized by high OM quality (high fresh chlorophyll (Chl a/Phaeo)) and available amino acids (enzymatically hydrolyzable amino acid (EHAA)/total enzymatically hydrolyzable amino acid (THAA)). The Biotic and Environmental linking analysis suggests that the benthic foraminiferal distribution is mostly controlled by three environmental parameters, i.e., TOC (quantity), EHAA/THAA (quality), and δ 13 C TOC (source). Hence, this study clearly highlights that the quantitative and qualitative inputs of OM and its source are the most important factors controlling the living benthic foraminiferal distribution with clear influences between the different rivers. This study also suggests a good tolerance of several species for river discharges where the OM quality is high.

show abstract

Benthic foraminifera off West Africa (1°N to 32°S): Do live assemblages from the topmost sediment reliably record environmental variability?

Cited by 80 publications

References 89 publications

Living deep-sea benthic foraminifera from the Cap de Creus Canyon (western Mediterranean): Faunal–geochemical interactions

Living deep-sea benthic foraminifera from the Cap de Creus Canyon (western Mediterranean): Faunal–geochemical interactions

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

Impact of organic matter source and quality on living benthic foraminiferal distribution on a river‐dominated continental margin: A study of the Portuguese margin

Contact Info

Product

Resources

About