生态学杂志2024，Vol.43Issue(6)：1763-1771,9.DOI:10.13292/j.1000-4890.202406.042
高海拔地区自然莼菜叶经济性状对水环境的响应
Response of leaf economic traits of natural Brasenia schreberi to water environment in high altitude area
摘要
Abstract
Exploring the response strategies of natural Brasenia schreberi to water environment can provide a theoret-ical basis for the scientific protection of natural populations.The relationships between leaf economic traits of B.schreberi and water environmental factors were detected in natural B.schreberi community in 17 sites from Beihai wetland in Tengchong,Western Yunnan Province.We measured functional traits and environmental factors of the sampling sites,and analyzed the response strategies of natural B.schreberi in high altitude area to water environ-ment.The results showed that,compared to that under 100％coverage,B.schreberi with a coverage of 60％-70％had larger leaf area,and lower mass fractions of nitrogen,phosphorus,iron,and zinc(P＜0.05).Water dissolved oxygen content,volume fractions of nitrogen,phosphorus,and ammonium nitrogen,and water temperature were the main factors affecting leaf economic traits of B.schreberi.Photosynthetic rate was significantly positively correlated with water dissolved oxygen content and the volume fractions of ammonium nitrogen and nitrate nitrogen(P＜0.05).Leaf thickness was significantly positively correlated with biochemical oxygen demand.Leaf area was significantly positively correlated with water dissolved oxygen content,volume fraction of ammonium nitrogen,and water temper-ature,and negatively correlated with water biochemical oxygen demand,chemical oxygen demand,and potassium permanganate index(P＜0.05).Leaf mass fraction of nitrogen was significantly positively correlated with water vol-ume fractions of nitrogen and ammonium nitrogen(P＜0.05).Leaf mass fraction of phosphorus was also significantly positively correlated with water volume fraction of nitrogen,while it was significantly negatively correlated with water dissolved oxygen content and water temperature(P＜0.05).Leaf nitrogen to phosphorus ratio was significantly positively correlated with dissolved oxygen content and volume fraction of ammonium nitrogen,but negatively corre-lated with chemical oxygen demand and potassium permanganate index(P＜0.05).Potassium,magnesium,silicon,calcium,iron and zinc in B.schreberi leaves were mainly correlated to water dissolved oxygen content,water tem-perature,and the nutritional conditions of nitrogen and phosphorus.Our results will provide a theoretical basis for the scientific conservation of natural B.schreberi communities.关键词
浮叶植物/高原湿地/叶经济性状/微环境/生态响应Key words
floating-leaved plant/plateau wetland/leaf economic trait/microenvironment/ecological response引用本文复制引用
陈弘毅,孙梅,刘振亚,杨航美..高海拔地区自然莼菜叶经济性状对水环境的响应[J].生态学杂志,2024,43(6):1763-1771,9.基金项目
云南省科技厅农业联合专项面上项目(202101BD070001-099)、国家自然科学基金地区基金项目(31760115)和云南省高原湿地保护修复与生态服务重点实验室(培育)开放基金(202105AG070002)资助. （202101BD070001-099）
