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• W2803258368 abstract "Understanding how different combinations of plant functional traits contribute to species fitness is a question of considerable ecological interest, that can give insights into the mechanisms controlling community assembly, and into the processes by which climate change can modify plant community structure and composition. We investigated the changes in cover degree of three shrubs ( Cistus monspeliensis , Dorycnium pentaphyllum and Helichrysum microphyllum ) growing in a Mediterranean garrigue subjected for 11 years to a reduced rainfall regime, following a conceptual framework based on the two‐phase resource dynamic model: considering the seasonal drought typical of the Mediterranean climate, the two‐phases were identified based on high (pulse phase) and low (interpulse phase) soil water availability. We developed a parameter proportional to the whole plant photosynthesis (plant photosynthetic index, PPI), scaling up the leaf photosynthesis to canopy level, taking into account the different canopy densities and the fluctuations in leaf biomass due to summer leaf shedding. PPI was used to derive plant performance estimators for both pulse (maximum value reached by PPI, PPI max ) and interpulse phase (duration of the exhaustion phase, Dur ep , when drought constrains PPI below the plant carbon compensation point determining carbon starvation). For each species the ratio between PPI max and Dur ep (named PPI red ) was used as an index of plant performance. The reduced rainfall regime mainly decreased the performances of the dominant species C. monspeliensis , both limiting PPI max and extending Dur ep . Under both natural and the manipulated rainfall regime, PPI red was proportional to plant success, measured as the cover degree variation rate of the species. This result suggests that a mechanistic approach using functional traits to quantify the different performance of co‐occurring species can be used to investigate 1) the drivers of the medium‐term changes in species abundance and 2) the processes responsible for change in plant community composition under climate change." @default.
• W2803258368 created "2018-06-01" @default.
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• W2803258368 date "2018-07-10" @default.
• W2803258368 modified "2023-10-14" @default.
• W2803258368 title "Linking photosynthetic performances with the changes in cover degree of three Mediterranean shrubs under climate manipulation" @default.
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• W2803258368 doi "https://doi.org/10.1111/oik.05263" @default.
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