Výsledky vyhledávání - "Gregory L. Cowie"

Patterns of carbon processing at the seafloor: the role of faunal and microbial communities in moderating carbon flows

Autor: Gregory L. Cowie, Steven Bouillon, Jack J. Middelburg, Emily Drake, Ursula Witte, Clare Woulds

Publikováno v: Woulds, C, Bouillon, S, Cowie, G L, Drake, E, Middelburg, J J & Witte, U 2016, ' Patterns of carbon processing at the seafloor: the role of faunal and microbial communities in moderating carbon flows ', Biogeosciences, vol. 13, no. 15, pp. 4343-4357 . https://doi.org/10.5194/bg-13-4343-2016
Biogeosciences, Vol 13, Iss 15, Pp 4343-4357 (2016)

Marine sediments, particularly those located in estuarine and coastal zones, are key locations for the burial of organic carbon (C). However, organic C delivered to the sediment is subjected to a range of biological C-cycling processes, the rates and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a9349b0341b4f74d8282b7e34e4261d
https://doi.org/10.5194/bg-13-4343-2016

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Deposition of artificial radionuclides in sediments of Loch Etive, Scotland

Autor: Francis R. Livens, Gareth T. W. Law, Hamza Al-Qasmi, Tim Brand, John A. Howe, Kathleen A. Law, Gregory L. Cowie, L. Keith Fifield

Publikováno v: Al-Qasmi, H, Law, G, Fifield, L K, Howe, J A, Brand, T, Cowie, G L, Law, K & Livens, F 2018, ' Deposition of artificial radionuclides in sediments of Loch Etive, Scotland ', Journal of Environmental Radioactivity . https://doi.org/10.1016/j.jenvrad.2018.02.001

The nuclear fuel reprocessing plants on the Sellafield site (UK) have released low-level effluents into the Irish Sea under authorisation since 1952. This has led to the labelling of nearby offshore sediments with a range of artificial radionuclides.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ccbc96df62bb0dede9c1141abcfe80a
https://pubmed.ncbi.nlm.nih.gov/29429873

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Carbon and Phosphorus Cycling in Arabian Sea Sediments across the Oxygen Minimum Zone

Autor: Gregory L. Cowie, Gabriel M. Filippelli

Publikováno v: Filippelli, G M & Cowie, G 2017, ' Carbon and Phosphorus Cycling in Arabian Sea Sediments across the Oxygen Minimum Zone ', Journal of Oceanography and Marine Research . https://doi.org/10.4172/2572-3103.1000171

Several studies have focused on carbon, oxygen, and phosphorus dynamics across the modern oxygen minimum zone (OMZ) to constrain how signals of modern systems get “locked in” upon burial. In this study, a sequential phosphorus fractionation techn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e0ae3dede92485c351504da9c9c3c1a
https://doi.org/10.4172/2572-3103.1000171

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Macrofaunal colonization across the Indian margin oxygen minimum zone

Autor: Andrew J. Gooday, Paul C. Cross, Clare Woulds, G. F. Mendoza, A. L. McGregor, Hiroshi Kitazato, Ursula Witte, Gregory L. Cowie, Lisa A. Levin

Publikováno v: Biogeosciences, Vol 10, Iss 11, Pp 7161-7177 (2013)
Levin, L A, McGregor, A L, Mendoza, G F, Woulds, C, Cross, P, Witte, U, Gooday, A J, Cowie, G & Kitazato, H 2013, ' Macrofaunal colonization across the Indian margin oxygen minimum zone ', Biogeosciences, vol. 10, no. 11, pp. 7161-7177 . https://doi.org/10.5194/bg-10-7161-2013

There is a growing need to understand the ability of bathyal assemblages to recover from disturbance and oxygen stress, as human activities and expanding oxygen minimum zones increasingly affect deep continental margins. The effects of a pronounced o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb56073c28ab5bafdf2676a788b4239f
https://doi.org/10.5194/bg-10-7161-2013

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Sedimentary denitrification rates across the Arabian Sea oxygen minimum zone

Autor: Gregory L. Cowie, Clare Woulds, Matthew C. Schwartz

Publikováno v: Deep Sea Research Part II: Topical Studies in Oceanography. 56:324-332

Sedimentary denitrification was measured at sites across the Pakistan Margin oxygen minimum zone (OMZ) during cruises before and after the 2003 Southwest (SW) Monsoon. Denitrification rates were calculated using nitrate fluxes and N 2 production rate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7f199337c58353c5940650c66d01d2e6
https://doi.org/10.1016/j.dsr2.2008.05.028

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Sedimentary pigments on the Pakistan margin: Controlling factors and organic matter dynamics

Autor: Clare Woulds, Gregory L. Cowie

Publikováno v: Deep Sea Research Part II: Topical Studies in Oceanography. 56:347-357

Sedimentary pigments can provide information on various aspects of benthic processes and biogeochemistry. In this study, sediments from sites at depths of 140 to 1850 m spanning the Pakistan margin oxygen minimum zone (OMZ), and representing dramatic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::690b4fe820a291cc35eee741fe6cc1e3
https://doi.org/10.1016/j.dsr2.2008.05.033

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Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen minimum zone (700–1100m)

Autor: Jennifer P. Gonzalez, Gregory L. Cowie, Lisa A. Levin, Christine R. Whitcraft, Guillermo Mendoza

Publikováno v: Deep Sea Research Part II: Topical Studies in Oceanography. 56:449-471

A transition from fully laminated to highly bioturbated sediments on continental margins is thought to derive from increased animal activity associated with increasing bottom-water oxygen concentration. We examined faunal community responses to oxyge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12dc021483412263b18571b4638b994d
https://doi.org/10.1016/j.dsr2.2008.05.032

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Carbon and nitrogen elemental and stable isotopic compositions of surficial sediments from the Pakistan margin of the Arabian Sea

Autor: Michelle Lewis, Stephen R. Mowbray, Gregory L. Cowie, Rebecca McKenzie, Helen Matheson

Publikováno v: Deep Sea Research Part II: Topical Studies in Oceanography. 56:271-282

The factors controlling sedimentary organic matter distributions are the subject of ongoing debate. We report here the carbon and nitrogen contents and stable isotopic compositions for surface sediments and downcore profiles from sites ranging in wat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e775aa98cd94c820c574772c8a27f50
https://doi.org/10.1016/j.dsr2.2008.05.031

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Porewater nutrient concentrations and benthic nutrient fluxes across the Pakistan margin OMZ

Autor: Gregory L. Cowie, Matthew C. Schwartz, Tim Brand, Gareth T. W. Law, Clare Woulds, Stephen R. Mowbray

Publikováno v: Deep Sea Research Part II: Topical Studies in Oceanography. 56:333-346

Porewater concentrations and benthic fluxes of phosphate, silicate, ammonia, nitrate and nitrite were measured at five sites spanning the Pakistan margin oxygen minimum zone (OMZ), in order to characterise the biogeochemical processes occurring, and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cea2dadc5b11a5c0f5f2aed7ac8807c9
https://doi.org/10.1016/j.dsr2.2008.05.034

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The short-term fate of organic carbon in marine sediments: Comparing the Pakistan margin to other regions

Autor: Lisa A. Levin, Clare Woulds, Gregory L. Cowie, J. H. Andersson, Jack J. Middelburg

Publikováno v: Deep Sea Research Part I-Oceanographic Research Papers, 56(6-7), 393-402. Elsevier B.V.

Pulse-chase experiments with isotopically labelled phytodetritus conducted across the Pakistan margin reveal that the impact of biological activities on benthic C-cycling varies markedly among sites exhibiting different seafloor conditions. In this s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a276080c73deefc5c02f62210e6800cc
https://doi.org/10.1016/j.dsr2.2008.10.008

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