Plant trait based approaches provide a mechanistic framework to understand and predict its potential survival and role within the community. T ephrosia purpurea is a perennial leguminous erect short-lived underscrub abundantly present on the wastelands of the Indian hot arid and semi arid region. In this study, its temporal biomass trait values and the trade-off with total biomass and among its different compartments were quantified. Impact of different bottom-up and top-down factors on the magnitude of all trait and trade-off values were also assessed. Contrary to several other such studies conducted from different eco-regions of the world, impacts of heat index, net radiation, extraterrestrial and incoming solar radiation, actual vapor pressure, species physiological attributes (maintenance respiration, NPP and GPP), community variables (richness and Relative importance value) were identified as significant factors by Canonical Correlation Analysis. Partial Least Squares (PLS) test suggested that various exploratory factors are working significantly and in random fashion and for this species and with this experimental set-up only two species variables i.e. leaf biomass trait and trade-off between capsule and stem can be mathematically explained with different factors.
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