基于MaxEnt模型的红鳍笛鲷全球分布格局OA

Lutjanus erythropterus is a commercially important marine fish species with undefined global potential suitable hab-itats.To clarify the distribution of the global potential suitable habitats of this species and provide a theoretical basis for optim-izing the site selection of its stock enhancement and aquaculture,this study conducted a predictive analysis of potential suitable habitats in global marine based on the MaxEnt model,by integrating 350 distribution points and 22 marine environmental vari-ables.Key environmental variables were screened through jacknife test and SHAP analysis,their ecological suitability thresholds were determined in combination with response curves,and the model accuracy was evaluated using AUC values.The results showed that the mean AUC values of both the training and test sets of the model exceeded 0.9,indicating extremely high prediction accuracy and reliability.Water depth,photosynthetically active radiation,and summer temperature(May-Oct.)were identified as the key environmental variables regulating the distribution of this species.The highly suitable habitat condi-tions for L.erythropterus were water depth within 78 m,photosynthetically active radiation of 46.2-47.5 E/(m2·d),and summer temperature of 26.8-28.3℃.The total area of its global highly suitable habitats was approximately 674 500 km2,mainly con-centrated along northern Australian coasts and fragmentally distributed along the coasts of Southeast Asia,the Red Sea and East Africa.Model predictions were generally consistent with the actual distribution of L.erythropterus,yet no actual distribution records were found in predicted areas such as the Red Sea,presumably due to interspecific interactions and historical dispersal.This study confirmed that the MaxEnt model is applicable to the prediction of suitable habitats for L.erythropterus with reli-able results.It clarified the distribution characteristics of the global suitable habitats of this species and the key influencing vari-ables,and recommended that the high and moderate suitable habitats such as northern Australian and Southeast Asian coasts be designated as priority areas for stock enhancement and aquaculture.