Environmental characteristics of Agulhas rings affect interocean plankton transport

Villar, Emilie; Farrant, Gregory K.; Follows, Michael J.; Garczarek, Laurence; Speich, Sabrina; Audic, Stéphane; Bittner, Lucie; Blanke, Bruno; Brum, Jennifer R.; Brunet, Christophe; Casotti, Raffaella; Chase, Alison; Dolan, John R.; D’Ortenzio, Fabrizio; Gattuso, Jean‐Pierre; Grima, Nicolas; Guidi, Lionel; Hill, Christopher N.; Jahn, O.; Jamet, Jean‐Louis; Goff, Hervé Le; Lepoivre, Cyrille; Malviya, Shruti; Pelletier, Éric; Romagnan, Jean‐Baptiste; Roux, Simon; Santini, Sébastien; Scalco, Eleonora; Schwenck, Sarah M.; Tanaka, Atsuko; Testor, Pierre; Vannier, Thomas; Vincent, Flora; Zingone, Adriana; Dimier, Céline; Picheral, Marc; Searson, Sarah; Kandels‐Lewis, Stefanie; Coordinators, Tara Oceans; Acinas, Silvia G.; Bork, Peer; Boss, Emmanuel; Vargas, Colomban de; Gorsky, Gabriel; Ogata, Hiroyuki; Pesant, Stéphane; Sullivan, Matthew B.; Sunagawa, Shinichi; Wincker, Patrick; Karsenti, Eric; Bowler, Chris; Not, Fabrice; Hingamp, Pascal; Iudicone, Daniele

doi:10.1126/science.1261447

Cited by 173 publications

(112 citation statements)

References 48 publications

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“…Although barriers to dispersal are fewer in the marine realm compared to the terrestrial one (Steele, 1991), coupling ocean connectivity patterns (Treml et al, 2008;Foltête et al, 2012) with niche models is likely important. Source-sink dynamics may arise frequently because of the advection of water masses (e.g., Beaugrand et al, 2007;Villar et al, 2015) that can introduce species to unsuitable regions (Pulliam, 2000), potentially biasing SDMs. Future developments for plankton could ensue from graph-based techniques (Dale and Fortin, 2010) and from SDMs coupling with simple dispersal models (Foltête et al, 2012;Zurell et al, 2016).…”

Section: Species Distribution Modeling-running Before We Can Walk?mentioning

confidence: 99%

Mare Incognitum: A Glimpse into Future Plankton Diversity and Ecology Research

et al. 2017

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With global climate change altering marine ecosystems, research on plankton ecology is likely to navigate uncharted seas. Yet, a staggering wealth of new plankton observations, integrated with recent advances in marine ecosystem modeling, may shed light on marine ecosystem structure and functioning. A EuroMarine foresight workshop on the "Impact of climate change on the distribution of plankton functional and phylogenetic diversity" (PlankDiv) identified five grand challenges for future plankton diversity and macroecology research: (1) What can we learn about plankton communities from the new wealth of high-throughput "omics" data? (2) What is the link between plankton diversity and ecosystem function? (3) How can species distribution models be adapted to represent plankton biogeography? (4) How will plankton biogeography be altered due to anthropogenic climate change? and (5) Can a new unifying theory of macroecology be developed based on plankton ecology studies? In this review, we discuss potential future avenues to address these questions, and challenges that need to be tackled along the way.

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Section: Species Distribution Modeling-running Before We Can Walk?mentioning

confidence: 99%

Mare Incognitum: A Glimpse into Future Plankton Diversity and Ecology Research

et al. 2017

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“…CRD1B and EnvBB were restricted to high latitude, cold, mixed waters (cluster 8), where they systematically codominated with ESTU IA, IVA, and IVC. This includes TARA_093 located in the Chilean upwelling, TARA_152 in North Atlantic, as well as TARA_068 in South Atlantic corresponding to a young Agulhas ring (42). In contrast, CRD1C and EnvBC preferentially thrived in warm HNLC regions (cluster 3 and the warmest stations of cluster 6), with CRD1C largely dominating the Synechococcus population in the Pacific intertropical area as well as at the Indian Ocean station TARA_052.…”

Section: Biogeography Of Prochlorococcus Reveals the Occurrence Of Minormentioning

confidence: 99%

Delineating ecologically significant taxonomic units from global patterns of marine picocyanobacteria

Farrant

Doré

Cornejo‐Castillo

et al. 2016

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

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Prochlorococcus and Synechococcus are the two most abundant and widespread phytoplankton in the global ocean. To better understand the factors controlling their biogeography, a reference database of the high-resolution taxonomic marker petB, encoding cytochrome b 6 , was used to recruit reads out of 109 metagenomes from the Tara Oceans expedition. An unsuspected novel genetic diversity was unveiled within both genera, even for the most abundant and well-characterized clades, and 136 divergent petB sequences were successfully assembled from metagenomic reads, significantly enriching the reference database. We then defined Ecologically Significant Taxonomic Units (ESTUs)-that is, organisms belonging to the same clade and occupying a common oceanic niche. Three major ESTU assemblages were identified along the cruise transect for Prochlorococcus and eight for Synechococcus. Although Prochlorococcus HLIIIA and HLIVA ESTUs codominated in irondepleted areas of the Pacific Ocean, CRD1 and the yet-to-be cultured EnvB were the prevalent Synechococcus clades in this area, with three different CRD1 and EnvB ESTUs occupying distinct ecological niches with regard to iron availability and temperature. Sharp community shifts were also observed over short geographic distances-for example, around the Marquesas Islands or between southern Indian and Atlantic Oceans-pointing to a tight correlation between ESTU assemblages and specific physico-chemical parameters. Together, this study demonstrates that there is a previously overlooked, ecologically meaningful, fine-scale diversity within some currently defined picocyanobacterial ecotypes, bringing novel insights into the ecology, diversity, and biology of the two most abundant phototrophs on Earth. molecular ecology | metagenomics | Tara Oceans | Synechococcus | Prochlorococcus

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“…Groundbreaking studies have demonstrated the responsiveness of the dominant picoplankton community to pulses of deep seawater (DSW) (24) and dissolved organic matter (DOM) (25), as well as the diel synchrony of the photosynthetic and heterotrophic communities (20), yet were limited in their coverage of the rare, large eukaryotic fraction due to both the low biomass of their standing stock and the lack of reference sequences. A recent world ocean survey has highlighted the diversity encompassed within the eukaryotic planktonic community (26) and suggested that the structuring of these communities may be driven by physical and chemical oceanographic features (27). However, again, the responsiveness of these keystone eukaryotic phytoplankton communities to changing environmental conditions remains poorly described and understood.…”

Section: Significancementioning

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.

109

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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Environmental characteristics of Agulhas rings affect interocean plankton transport

Cited by 173 publications

References 48 publications

Mare Incognitum: A Glimpse into Future Plankton Diversity and Ecology Research

Mare Incognitum: A Glimpse into Future Plankton Diversity and Ecology Research

Delineating ecologically significant taxonomic units from global patterns of marine picocyanobacteria

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

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