Coccolithophore ecology at the HOT station ALOHA, Hawaii

Cortés, Mara Y.; Bollmann, Jörg; Thierstein, Hans R.

doi:10.1016/s0967-0645(00)00165-x

Cited by 136 publications

(73 citation statements)

References 42 publications

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“…Coccolithophorids are common at the ALOHA site (e.g. Cortés et al, 2001) and material collected by the NBST's deployed at 150m, 300m and 500m is characterized by a relatively larger contribution of CaCO 3 as compared to K2 (Buesseler et al, 2007;Lamborg et al, this volume). The subarctic K2 site is characterized by high surface nutrients, including silica (Saito et al, 2002) and clear diatom dominance (Honda, 2003;Honda et al, 2006;Buesseler et al, this volume;Silver et al, 2006).…”

Section: Site Descriptionsmentioning

confidence: 99%

Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific

Dehairs

Jacquet

Savoye

et al. 2008

Deep Sea Research Part II: Topical Studies in Oceanography

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This study focuses on the fate of exported organic carbon in the twilight zone at two contrasting environments in the North Pacific: the oligotrophic ALOHA site (22°45' N 158°W; Hawaii; studied during June-July 2004) and the mesotrophic Subarctic Pacific K2 site (47°N, 161°W; studied during July-August 2005). Earlier work has shown that non-lithogenic, excess particulate Ba (Ba xs ) in the mesopelagic water column is a potential proxy of organic carbon remineralization. In general Ba xs contents were significantly larger at K2 than at ALOHA. At ALOHA the Ba xs profiles

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Section: Site Descriptionsmentioning

confidence: 99%

Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific

Dehairs

Jacquet

Savoye

et al. 2008

Deep Sea Research Part II: Topical Studies in Oceanography

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“…Physiologically, it is also recognized that non-thermal factors such as nutrient and light availability can alter quite significantly the U K' 37 value set by alkenoneproducers growing under isothermal conditions (EPSTEIN et al, 2001;EPSTEIN et al, 1998;PRAHL et al, 2003). CORTES et al (2001) studied the coccolithophorid ecology at Station ALOHA. E. huxleyi and Geophyrocapsa ericsonii were reported as co-occurring, major contributors to the overall coccolithorphorid community.…”

Section: Seasonal Relationship Of Alkenone Export Tomentioning

confidence: 99%

Ecology and biogeochemistry of alkenone production at Station ALOHA

Prahl

Popp

Karl

et al. 2005

Deep Sea Research Part I: Oceanographic Research Papers

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In our study of Station ALOHA, a site representative of the oligotrophic North Pacific subtropical gyre (NPSG), alkenone content and composition were examined in 1) sinking particulate materials collected in sediment traps moored at 2800m during two, year-long deployments (1992-93 and 2000-01) and 2) suspended particulate materials collected throughout the euphotic zone in two contrasting seasons (winter and summer).

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“…Regardless of the source, these nutrient-loading events could act to stimulate blooms in the large eukaryotic phytoplankton community. Historically, the distributions of key eukaryotic phytoplankton function groups have been tracked relative to nutrient stoichiometries to examine how nutrients influence the physiological ecology of different functional groups like diatoms and haptophytes (4,15). Although valuable, it is still difficult to…”

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confidence: 99%

Functional group-specific traits drive phytoplankton dynamics in the oligotrophic ocean

Alexander

Rouco

Haley

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

116

113

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A diverse microbial assemblage in the ocean is responsible for nearly half of global primary production. It has been hypothesized and experimentally demonstrated that nutrient loading can stimulate blooms of large eukaryotic phytoplankton in oligotrophic systems. Although central to balancing biogeochemical models, knowledge of the metabolic traits that govern the dynamics of these bloom-forming phytoplankton is limited. We used eukaryotic metatranscriptomic techniques to identify the metabolic basis of functional group-specific traits that may drive the shift between net heterotrophy and autotrophy in the oligotrophic ocean. Replicated blooms were simulated by deep seawater (DSW) addition to mimic nutrient loading in the North Pacific Subtropical Gyre, and the transcriptional responses of phytoplankton functional groups were assayed. Responses of the diatom, haptophyte, and dinoflagellate functional groups in simulated blooms were unique, with diatoms and haptophytes significantly (95% confidence) shifting their quantitative metabolic fingerprint from the in situ condition, whereas dinoflagellates showed little response. Significantly differentially abundant genes identified the importance of colimitation by nutrients, metals, and vitamins in eukaryotic phytoplankton metabolism and bloom formation in this system. The variable transcript allocation ratio, used to quantify transcript reallocation following DSW amendment, differed for diatoms and haptophytes, reflecting the longstanding paradigm of phytoplankton r-and K-type growth strategies. Although the underlying metabolic potential of the large eukaryotic phytoplankton was consistently present, the lack of a bloom during the study period suggests a crucial dependence on physical and biogeochemical forcing, which are susceptible to alteration with changing climate. metatranscriptomics | phytoplankton | ecological traits |

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Coccolithophore ecology at the HOT station ALOHA, Hawaii

Cited by 136 publications

References 42 publications

Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific

Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific

Ecology and biogeochemistry of alkenone production at Station ALOHA

Functional group-specific traits drive phytoplankton dynamics in the oligotrophic ocean

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