Effect of Environmental Drivers on Functional Traits of Salvadora Population in the Semi-Arid Regions: A Case Study...

Salvadora faces a significant threat of being in decline in semi-arid regions. This study investigates the distribution status of Salvadora species in semi-arid habitats, moreover examines how habitat types, climatic conditions and soil variability influence plant's functional traits and distribution. The study was organized in the semi-arid lowlands of the Sahiwal Division, Pakistan. Field surveys were conducted from 2021 to 2023 across 51 sites comprised of four types of habitats, i.e., archaeological sites, graveyards, roadsides, and railway lines. Principal Component Analysis (PCA) and Canonical Correspondence Analysis (CCA) were applied to examine the impact of habitat types and environmental variables on Salvadora distribution. Two species of Salvadora, i.e., Salvadora persica Linn and Salvadora oleoides Decne, were identified taxonomically in the study area. S. persica was found to be more abundant than S. oleoides. These results recommend that S. persica was more dominant in most sites except for Sahiwal, where both species had similar densities. The number of tree trunks, tree height, and leaf size, leaf biomass are some of the dominant traits that were influenced by habitat variability. Other factors like temperature, precipitation, th soil's pH and moisture levels play important roles in species distribution within these habitats. Despite Salvadora notable economic and ecological importance, its ecological situation is critical because of overexploitation, climate change, and habitat destruction. To ensure that Salvadora continues to exist and perform its ecological functions in its natural habitat, protecting and managing strategies need to be planned and enforced.