Exploring Phylogenetic Diversity and Floristic Shifts Along an Elevational Gradient in a Northeast Brazilian Alpine Ecosystem

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

This study examines plant diversity along an elevational gradient in the Serra de Itabaiana National Park, northeastern Brazil, focusing on species richness, phylogenetic diversity, and beta diversity. We identified 108 across five elevation bands, with richness declining linearly increasing elevation. Precipitation temperature positively influenced but no significant relationship was observed for metrics. Notably, peaked at mid-elevations, exhibiting a hump-shaped pattern, while higher elevations hosted phylogenetically clustered communities, reflecting environmental filtering. Beta analysis revealed turnover as dominant driver of dissimilarity between belts, emphasizing role replacement over nestedness. These findings underscore influence climatic variables constraints community composition, distinct patterns adaptation elevations. Contrary to expectations, phanerophytes dominated gradient, challenging predicted prevalence hemicryptophytes Our highlights importance integrating data understand biodiversity dynamics understudied regions like Brazil. Conservation efforts should prioritize maintaining capture ensure ecosystem resilience. contribute valuable insights into interplay ecological evolutionary processes shaping communities low-elevation mountain systems.

Language: Английский

Plant Diversity Characteristics and Environmental Interpretation Under the Land–Sea Gradient in the Yellow River Delta

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(7), P. 4030 - 4030

Published: April 6, 2025

Understanding the characteristics and key driving factors of plant diversity is great significance for maintaining biodiversity ecosystem. Current studies on in Yellow River Delta are limited to local areas; there a lack comprehensive discussion spatial heterogeneity at regional scale. Based field investigations, this study explored composition under land–sea gradient, with particular emphasis differences different riverbanks distance from sea. Using regression, redundancy, Mantel test analysis, we analyzed soil properties, environmental factors, human influence assess their potential impacts diversity. The results demonstrated that Asteraceae, Poaceae, Amaranthaceae dominant families Delta. As sea increases, community transitions monospecies dominance Suaeda salsa one dominated by various plants. species similarity was higher adjacent environment coastal areas. overall level not high, Margalef, Shannon–Wiener, Simpson, Pielou index showed fluctuating downward trend land Notably, peak value region 3–17 km >42 main stream bank than its tributaries, where former more susceptible interference latter electrical conductivity. In terms region, conductivity had greatest This could provide theoretical support vegetation restoration ecological protection

Language: Английский