Variation of thermal plasticity for functional traits between populations of an invasive aquatic plant from two climatic
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INVASIVE SPECIES III
Variation of thermal plasticity for functional traits between populations of an invasive aquatic plant from two climatic regions Gabrielle Thie´baut . Miche`le Tarayre . Olivier Jambon . Nathalie Le Bris . Herve´ Colinet . David Renault
Received: 15 May 2020 / Revised: 16 October 2020 / Accepted: 22 October 2020 Ó Springer Nature Switzerland AG 2020
Abstract Temperature inducible phenotypic plasticity is a major player in plant responses to climate warming. Functional responses and their role in determining thermal plasticity of plants remain poorly understood. Our objective was to compare trait responses of six populations of Ludwigia peploides resulting from seed from Oceanic climate and from Mediterranean climate after an exposure at three temperatures (16, 24, and 30°C). A comparative analysis showed that at 30°C, the six populations of L. peploides shared different morphological responses, whereas a common pattern of morphological responses was found for the six populations at 16°C. At 16°C, the growth was very low suggesting a Guest editors: Katya E. Kovalenko, Fernando M. Pelicice, Lee B. Kats, Jonne Kotta & Sidinei M. Thomaz / Aquatic Invasive Species III
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10750-020-04452-2) contains supplementary material, which is available to authorized users. G. Thie´baut (&) M. Tarayre O. Jambon N. Le Bris H. Colinet D. Renault Univ Rennes, CNRS ECOBIO [(Ecosyste`mes, biodiversite´, e´volution)] - UMR 6553, 35000 Rennes, France e-mail: [email protected] D. Renault Institut Universitaire de France, 1 Rue Descartes, 75231 Paris Cedex 05, France
stress. At 30°C, the three Mediterranean populations of L. peploides accumulated & sevenfold more total biomass than the populations from Oceanic region. Despite drawing similar response pattern to temperature, the populations showed several different metabolic responses. The thermal plastic responses to the highest temperature differed according to the origin of the populations. The Mediterranean populations of L. peploides could be better adapted to rising temperature. These abilities could allow them to take advantage from climate warming if the temperature is not warming up to temperature above a critical threshold. Keywords Morphological traits Physiological traits Metabolome approach Climate warming Ludwigia peploides
Introduction Environmental changes, including climate change, have profound impacts on life history traits of aquatic plant species, in turn affecting population dynamics and community structure in lakes and streams (Meerhoff et al., 2012; Salinas et al., 2018). In addition to rising temperature, several climatic models predict that the frequency and magnitude of temperature extremes will likely increase in the future (Seneviratne et al., 2012). These worldwide changes in climatic features will modify climate envelopes, increasing the
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Hydrobiologia
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