Potential Suitable Areas and Ecological Niche Overlap of Derris trifoliata,Aegiceras corniculatum and Avicennia marina in Beibu Gulf of Guangxi
The competition between Derris trifoliata and mangrove forests has led to mangrove ecosystem destruction.Understanding the spatial distribution prediction and niche analysis of Derris trifoliata,Aegiceras corniculatum,and Avicennia marina is crucial for discerning their competitive relationships.This knowledge is significant for both Derris trifoliata control and mangrove protection.However,the current research gap lies in the distribution of Derris trifoliata and its overlapping niches with mangrove plants.This study focuses on Derris trifoliata,Aegiceras corniculatum,and Avicennia marina sourced from the Beibu Gulf of Guangxi.Using ENMTools,we screened sixteen environmental variables,and the kuenm package in R-optimized frequency and feature combination parameters for the MaxEnt model.This allowed us to establish a plant distribution prediction model and explore the spatial distribution and niche overlap of these three plants.The study revealed that elevation emerged as the primary environmental factor influencing the distribution of Derris trifoliata,Aegiceras corniculatum,and Avicennia marina.Optimal elevations for the three plants followed the sequence:Avicennia marina,Aegiceras corniculatum,and Derris trifoliata.Derris trifoliata thrived in areas with an average sea surface salinity of less than 11.226‰ during the warmest season,suggesting its preference for the high tide zone with lower salinity.The ecological niche width exhibited a decreasing trend among Avicennia marina,Aegiceras corniculatum,and Derris trifoliata,with values of 0.280 6,0.259 5,and 0.135 0,respectively.Notably,the ecological niche overlap values for Derris trifoliata with Aegiceras corniculatum and Avicennia marina were 0.903 4 and 0.441 8,signifying a higher degree of resource utilization similarity between Derris trifoliata and Aegiceras corniculatum and a more pronounced competitive relationship.Model predictions identified optimal suitable areas for Derris trifoliata,Aegiceras corniculatum,and Avicennia marina as 5 603.35 hm2,13 112.28 hm2,and 11 794.86 hm2,respectively.Overlapping regions of optimally suitable habitats for Aegiceras corniculatum and Derris trifoliata were predominantly situated in Lianzhou Bay.These findings establish a scientific foundation for Derris trifoliata prevention and control and the preservation of mangroves in the Beibu Gulf of Guangxi.
maximum entropy modelGuangxi Beibu GulfDerris trifoliatamangrovesuitable areas
NETL
NSTL
万方数据
