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Wrong-way migrations of benthic species driven by ocean warming and larval transport

Author

Listed:
  • Heidi L. Fuchs

    (Rutgers University)

  • Robert J. Chant

    (Rutgers University)

  • Elias J. Hunter

    (Rutgers University)

  • Enrique N. Curchitser

    (Rutgers University)

  • Gregory P. Gerbi

    (Skidmore College)

  • Emily Y. Chen

    (Rutgers University)

Abstract

Ocean warming has predictably driven some marine species to migrate polewards or to deeper water, matching rates of environmental temperature change (climate velocity) to remain at tolerable temperatures. Most species conforming to expectations are fish and other strong swimmers that can respond to temperature change by migrating as adults. On the Northwest Atlantic continental shelf, however, many benthic invertebrates’ ranges have instead shifted southwards and into shallower, warmer water. We tested whether these ‘wrong-way’ migrations could arise from warming-induced changes in the timing of spawning (phenology) and transport of drifting larvae. The results showed that larvae spawned earlier in the year encounter more downwelling-favourable winds and river discharge that drive transport onshore and southwards. Phenology and transport explained most observed range shifts, whereas climate velocity was a poor predictor. This study reveals a physical mechanism that counterintuitively pushes benthic species, including commercial shellfish, into warmer regions with higher mortality.

Suggested Citation

  • Heidi L. Fuchs & Robert J. Chant & Elias J. Hunter & Enrique N. Curchitser & Gregory P. Gerbi & Emily Y. Chen, 2020. "Wrong-way migrations of benthic species driven by ocean warming and larval transport," Nature Climate Change, Nature, vol. 10(11), pages 1052-1056, November.
    • Handle: RePEc:nat:natcli:v:10:y:2020:i:11:d:10.1038_s41558-020-0894-x
    DOI: 10.1038/s41558-020-0894-x
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    Cited by:

    1. Teller, Kyle G. & Pringle, James M., 2023. "Determining the most recent common ancestor in a finite linear habitat with asymmetric dispersal," Theoretical Population Biology, Elsevier, vol. 153(C), pages 91-101.

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