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<p>Halophytic ecosystems in arid coastal zones are vulnerable to environmental change, yet biodiversity-soil feedbacks in these regions remain poorly understood. This study investigates the spatiotemporal dynamics of plant diversity and soil properties across five distinct halophytic ecosystems coastal strand, estuarine wetland, seasonal monsoonal wetland, perennial wetland complex, and saline grassland in the Porbandar region of Gujarat, India. Field surveys and soil sampling were conducted pre- and post-monsoon to assess alpha and beta diversity, soil characteristics, and their interrelationships. Results revealed that seasonal monsoon pulses significantly reshaped plant communities, increasing alpha diversity in most ecosystems by temporarily reducing salinity stress. Beta diversity was overwhelmingly driven by species turnover (replacement) rather than nestedness, reflecting strong environmental filtering and niche partitioning across the ecosystem mosaic. Multivariate analyses, including hierarchical clustering and canonical correspondence analysis, demonstrated a significant decoupling between soil property gradients and biodiversity structure, indicating that plant community assembly is not solely determined by edaphic factors. The findings underscore that seasonal hydrology and biogeographic disjunction are critical drivers of halophytic community composition, with implications for the conservation and management of these ecosystems under changing climatic conditions.</p>

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Biodiversity soil feedbacks in halophytic ecosystems evidenced by seasonal dynamics in arid coastal zones

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月31日

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  • Kunal N. Odedra,
  • Kavan Shukla,
  • B. A. Jadeja

摘要

Halophytic ecosystems in arid coastal zones are vulnerable to environmental change, yet biodiversity-soil feedbacks in these regions remain poorly understood. This study investigates the spatiotemporal dynamics of plant diversity and soil properties across five distinct halophytic ecosystems coastal strand, estuarine wetland, seasonal monsoonal wetland, perennial wetland complex, and saline grassland in the Porbandar region of Gujarat, India. Field surveys and soil sampling were conducted pre- and post-monsoon to assess alpha and beta diversity, soil characteristics, and their interrelationships. Results revealed that seasonal monsoon pulses significantly reshaped plant communities, increasing alpha diversity in most ecosystems by temporarily reducing salinity stress. Beta diversity was overwhelmingly driven by species turnover (replacement) rather than nestedness, reflecting strong environmental filtering and niche partitioning across the ecosystem mosaic. Multivariate analyses, including hierarchical clustering and canonical correspondence analysis, demonstrated a significant decoupling between soil property gradients and biodiversity structure, indicating that plant community assembly is not solely determined by edaphic factors. The findings underscore that seasonal hydrology and biogeographic disjunction are critical drivers of halophytic community composition, with implications for the conservation and management of these ecosystems under changing climatic conditions.