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    Tropical seagrass Halophila stipulacea shifts thermal tolerance during Mediterranean invasion

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    Type
    Article
    Authors
    Wesselmann, Marlene cc
    Anton Gamazo, Andrea cc
    Duarte, Carlos M. cc
    Hendriks, Iris E.
    Agusti, Susana cc
    Savva, Ioannis
    Apostolaki, Eugenia T.
    Marbà, Núria cc
    KAUST Department
    Red Sea Research Center (RSRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Date
    2020-03-04
    Online Publication Date
    2020-03-04
    Print Publication Date
    2020-03-11
    Submitted Date
    2019-12-24
    Permanent link to this record
    http://hdl.handle.net/10754/661652
    
    Metadata
    Show full item record
    Abstract
    Exotic species often face new environmental conditions that are different from those that they are adapted to. The tropical seagrass Halophila stipulacea is a Lessepsian migrant that colonized the Mediterranean Sea around 100 years ago, where at present the minimum seawater temperature is cooler than in its native range in the Red Sea. Here, we tested if the temperature range in which H. stipulacea can exist is conserved within the species or if the exotic populations have shifted their thermal breadth and optimum due to the cooler conditions in the Mediterranean. We did so by comparing the thermal niche (e.g. optimal temperatures, and upper and lower thermal limits) of native (Saudi Arabia in the Red Sea) and exotic (Greece and Cyprus in the Mediterranean Sea) populations of H. stipulacea. We exposed plants to 12 temperature treatments ranging from 8 to 40°C for 7 days. At the end of the incubation period, we measured survival, rhizome elongation, shoot recruitment, net population growth and metabolic rates. Upper and lower lethal thermal thresholds (indicated by 50% plant mortality) were conserved across populations, but minimum and optimal temperatures for growth and oxygen production were lower for Mediterranean populations than for the Red Sea one. The displacement of the thermal niche of exotic populations towards the colder Mediterranean Sea regime could have occurred within 175 clonal generations.
    Citation
    Wesselmann, M., Anton, A., Duarte, C. M., Hendriks, I. E., Agustí, S., Savva, I., … Marbà, N. (2020). Tropical seagrass Halophila stipulacea shifts thermal tolerance during Mediterranean invasion. Proceedings of the Royal Society B: Biological Sciences, 287(1922), 20193001. doi:10.1098/rspb.2019.3001
    Sponsors
    This work was funded by the Spanish Ministry of Economy and Competitiveness (Project MEDSHIFT, CGL2015-71809-P), the Spanish Ministry of Science, Innovation and Universities (SUMAECO, RTI2018-095441-B-C21) and King Abdullah University for Science and Technology (3834 KAUST-CSIC Research Collaboration and base line funding to C.M.D.). We thank Zenon Batang for the nutrient concentration data, Julius Glampedakis for field assistance and Olga Sanchez and Rocío Garcia for laboratory assistance. M.W. was supported by a PhD contract (BES-2016-078241) of the Spanish Ministry of Science, Innovation and Universities.
    Publisher
    The Royal Society
    Journal
    Proceedings of the Royal Society B: Biological Sciences
    DOI
    10.1098/rspb.2019.3001
    Additional Links
    https://royalsocietypublishing.org/doi/10.1098/rspb.2019.3001
    Relations
    Is Supplemented By:
    • [Dataset]
      Wesselmann, M., Anton, A., Duarte, C. M., Hendriks, I. E., Agustí, S., Savva, I., Apostolaki, E. T., & Marbà, N. (2020). Supplementary material from " Tropical seagrass Halophila stipulacea shifts thermal tolerance during Mediterranean invasion". The Royal Society. https://doi.org/10.6084/M9.FIGSHARE.C.4870104. DOI: 10.6084/m9.figshare.c.4870104 Handle: 10754/665169
    ae974a485f413a2113503eed53cd6c53
    10.1098/rspb.2019.3001
    Scopus Count
    Collections
    Marine Science Program; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Articles

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