国家自然科学基金No.41371127;福建省科技计划重点项目No.2014R1034-1;福建师范大学亚热带河口生物地球化学创新团队项目No.IRTL1205;福建师范大学地理科学学院研究生创新基金项目;the National Natural Science Foundation of China No.41371127,the Key Sciences and Technology Project of Fujian Province No.2014R1034-1,the Program for Innovative Research Teams of Fujian Normal University No.IRTL1205 and the Graduate Innovation Project of the School of Geographical Sciences of Fujian Normal University