Epifaunal Foraminifera in an Infaunal World: Insights Into the Influence of Heterogeneity on the Benthic Ecology of Oxygen-Poor, Deep-Sea Habitats

Venturelli, Ryan A.; Rathburn, Anthony E.; Burkett, Ashley; Ziebis, Wiebke

doi:10.3389/fmars.2018.00344

Cited by 21 publications

(20 citation statements)

References 54 publications

(106 reference statements)

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“…Reported as common in areas with variable organic matter input and elevated oxygen concentrations (Gooday, 2003, and the references therein; Sarkar and Gupta, 2014;Venturelli et al, 2018); also observed in dysoxic sediments (lowest oxygen values measured 9 µmol kg −1 ; Douglas and Heitman, 1979;Mackensen and Douglas, 1989); indicator of elevated oxygenation (Schmiedl et al, 1997;Geslin et al, 2004). Aragonitic shell, prone to dissolution (Gonzales et al, 2017).…”

Section: Hoeglundina Elegansmentioning

confidence: 99%

“…Common in the OMZs in the Pacific Ocean (Douglas and Heitman, 1979;Ingle et al, 1980;Mackensen and Douglas, 1989;Nomaki et al, 2006;Glud et al, 2009;Fontanier et al, 2014;Venturelli et al, 2018); indicates intermediate hypoxic conditions/lower boundary of the OMZ core (Mullins et al, 1985;Mallon, 2012); able to use nitrate for respiration (Glock et al, 2011(Glock et al, , 2019; suggested as dysoxic indicator (Kaiho, 1994); used as a proxy for suboxic conditions Tetard et al, 2017), for intermediate hypoxia (Moffitt et al, 2014) and for bottom-water nitrate reconstruction (Glock et al, 2018).…”

Section: Bolivina Spissamentioning

confidence: 99%

“…Oxygen minimum zones (OMZs) occur where intense upwelling and high primary productivity result in elevated oxygen consumption within the water column in combination with sluggish ventilation (Wyrtki, 1962;Helly and Levin, 2004;Fuenzalida et al, 2009). In today's world oceans, the most pronounced OMZs with oxygen concentrations <20 µmol kg −1 are observed offshore of northwest and southwest Africa, in the Arabian Sea and Bay of Bengal in the Indian Ocean, and along the continental margin of the eastern Pacific at low latitudes (Helly and Levin, 2004;Paulmier and Ruiz-Pino, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera

et al. 2020

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Abstract. Deciphering the dynamics of dissolved oxygen in the mid-depth ocean during the last deglaciation is essential to understand the influence of climate change on modern oxygen minimum zones (OMZs). Many paleo-proxy records from the eastern Pacific Ocean indicate an extension of oxygen-depleted conditions during the deglaciation, but the degree of deoxygenation has not been quantified to date. The Peruvian OMZ, one of the largest OMZs in the world, is a key area to monitor such changes in near-bottom-water oxygenation in relation to changing climatic conditions. Here, we analysed the potential to use the composition of foraminiferal assemblages from the Peruvian OMZ as a quantitative redox proxy. A multiple regression analysis was applied to a joint dataset of living (rose-bengal-stained, fossilizable calcareous species) benthic foraminiferal distributions from the Peruvian continental margin. Bottom-water oxygen concentrations ([O2]BW) during sampling were used as the dependant variable. The correlation was significant (R2=0.82; p<0.05), indicating that the foraminiferal assemblages are rather governed by oxygen availability than by the deposition of particulate organic matter (R2=0.53; p=0.31). We applied the regression formula to three sediment cores from the northern part of the Peruvian OMZ between 3 and 8∘ S and 997 and 1250 m water depth, thereby recording oxygenation changes at the lower boundary of the Peruvian OMZ. Each core displayed a similar trend of decreasing oxygen levels since the Last Glacial Maximum (LGM). The overall [O2]BW change from the LGM and the Holocene was constrained to 30 µmol kg−1 at the lower boundary of the OMZ.

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Section: Hoeglundina Elegansmentioning

confidence: 99%

Section: Bolivina Spissamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera

et al. 2020

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“…Common in the OMZs in the Pacific Ocean (Douglas and Heitman, 1979;Ingle et al, 1980;Mackensen and Douglas, 1989;Nomaki et al, 2006;Glud et al, 2009;Fontanier et al, 2014;Venturelli et al, 2018); indicates intermediate hypoxic conditions/lower boundary of the OMZ core (Mullins et al, 1985;Mallon, 2012), potentially able to use nitrate for respiration (Glock et al, 2011): suggested as dysoxic indicator (Kaiho, 1994); used as a proxy for suboxic conditions Tetard et al, 2017), for intermediate hypoxia (Moffitt et al, 2014), and for bottom water nitrate reconstruction (Glock et al, 2018).…”

Section: Bolivina Spissamentioning

confidence: 99%

Bottom-water deoxygenation at the Peruvian Margin during the last deglaciation recorded by benthic foraminifera

Erdem¹,

Schönfeld²,

Rathburn³

et al. 2019

Preprint

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“…Além da qualidade e quantidade da MO, o teor de oxigênio é um parâmetro importante para as associações de foraminíferos de mar profundo. Segundo Venturelli et al (2018), ambientes bentônicos com oxigênio disponível limitado são caracterizados por apresentarem alto teor de carbono orgânico (alta produtividade primária), alta taxa de sedimentação, presença de sedimentos finos, baixa bioturbação. Habitats bentônicos marinhos pobres em oxigênio e matéria orgânica são dominados por foraminíferos infaunais, enquanto ambientes mais oxigenados são povoados por táxons epifaunais (VENTURELLI et al, 2018).…”

Section: Passagem Do Drake -Opxxxi (2013)unclassified

Ecologia de foraminíferos bentônicos das regiões da Passagem do Drake e Ilha de Marambio, Península Antártica

Passos¹,

Duleba²

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Primeiramente, agradeço a minha família, em especial minha mãe. Muito obrigada por todo apoio, paciência, compreensão em meus momentos de ausência, mas principalmente obrigada por sempre acreditar em mim, pelas palavras de motivação, pelo carinho e amor incondicional. A minha orientadora Profa. Dra. Wânia Duleba, obrigada pela orientação valiosa, pelos momentos enriquecedores que passamos juntas, pela dedicação e paciência. Mas acima de tudo, muito obrigada por me mostrar a verdadeira força feminina e por nossa amizade. A Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), pelo apoio financeiro por meio de concessão de bolsa. A Profa. Dra. Maria Virgínia Martins da Universidade Estadual do Rio de Janeiro (UERJ), pela ajuda inestimável na identificação dos foraminíferos da Passagem do Drake. Por me receber de braços abertos no Rio de Janeiro, pela sua doçura em compartilhar seu vasto conhecimento sobre os "foramis". Aos meus "irmãos científicos" Maria Carolina Hernandes Ribeiro, Leonardo Antonio Pregnolato e Rayssa de Almeida Viana, por dividirem comigo todos os momentos e por nos tornarmos uma equipe unida que vibra com as vitórias um do outro. Aos colegas discentes do Programa de Pós-graduação em Sustentabilidade, principalmente Milla Araujo de Almeida, Luiza Coatti, pela força, apoio, descontração e por tornar a rotina mais leve. Realizar coletas em ambiente hostil e remoto, como a Antártica, não é uma tarefa trivial. Amostrar na Passagem do Drake a 3.800 m de profundidade, então, é algo inimaginável. No presente estudo foram utilizadas amostras coletadas durante as

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Epifaunal Foraminifera in an Infaunal World: Insights Into the Influence of Heterogeneity on the Benthic Ecology of Oxygen-Poor, Deep-Sea Habitats

Cited by 21 publications

References 54 publications

Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera

Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera

Bottom-water deoxygenation at the Peruvian Margin during the last deglaciation recorded by benthic foraminifera

Ecologia de foraminíferos bentônicos das regiões da Passagem do Drake e Ilha de Marambio, Península Antártica

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