δ13 and water-use efficiency indicated by δ13 of different plant functional groups on Changbai Mountains, Northeast China

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2009,（10）
• 页码范围: 1759-1764
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11434-009-0046-1

摘要

Leaf δ13 of different plant functional groups (trees, shrubs and forbs; evergreen and deciduous; an-nual, biennial and perennial) were examined on the Changbai Mountains, China. Life form has a sig-nificant influence on plant δ13, suggesting that leaf δ13 is also ideal for distinguishing functional groups species in temperate and frigid zones with high humidity. Additionally, the difference of wa-ter-use efficiency (WUE) is significant among different plant functional groups.δ13 and WUE are in the following order of forbs < shrubs < trees. Within shrubs, δ13 and WUE are higher for evergreen shrubs than deciduous shrubs. Differences in δ13 and WUE are significant among different lifespan herbs, and δ13 and WUE follow the order of annual herbs > biennial herbs > perennial herbs, not in accor-dance with the pattern obtained by previous studies in deserts, suggesting that the ranking of δ13 and WUE among annual, biennial and perennial herbs may be dependent on local water availability.