CAJ | 학술논문

以全球变暖为主要特征的全球气候变化已经并正在改变着陆地生态系统的结构和功能.现存植被与环境间的关系是经过漫长自然选择而形成的,因此植物物候变化可能会影响物种与环境间的相互关系.采用开顶式生长室(Open-top chamber,OTC)和移地试验(transposing of surface soil with vegetation,TSSV)模拟增温的方法,研究了川西亚高山岷江冷杉幼苗物候和冻害对模拟增温的短期响应.结果表明,生长季中OTC内日平均气温较对照增加2.2 ℃,高海拔(3 200 m)比低海拔(2 600 m)日平均温度低2.5 ℃.在两种研究方法下,温度升高都使岷江冷杉芽开放提前,休眠期推迟,生长季延长.温度升高使岷江冷杉幼苗新生芽遭受严重的冻害.结果表明,在未来全球气候变化的背景下,高海拔物种遭受早春冻害的可能性大.
이전구변난위주요특정적전구기후변화이경병정재개변착륙지생태계통적결구화공능.현존식피여배경간적관계시경과만장자연선택이형성적,인차식물물후변화가능회영향물충여배경간적상호관계.채용개정식생장실(Open-top chamber,OTC)화이지시험(transposing of surface soil with vegetation,TSSV)모의증온적방법,연구료천서아고산민강랭삼유묘물후화동해대모의증온적단기향응.결과표명,생장계중OTC내일평균기온교대조증가2.2 ℃,고해발(3 200 m)비저해발(2 600 m)일평균온도저2.5 ℃.재량충연구방법하,온도승고도사민강랭삼아개방제전,휴면기추지,생장계연장.온도승고사민강랭삼유묘신생아조수엄중적동해.결과표명,재미래전구기후변화적배경하,고해발물충조수조춘동해적가능성대.
Global climate change mainly characterized by global warming had changed and been changing the structure and function of terrestrial ecosystem. The relationships between current vegetations and environments are formed through hundreds of thousands of years′ evolution, thus changes in plant phenology may influence these subtle relationships. In this study, the short-term responses of leaf phenology, freezing damage of Abies faxoniana to simulated global warming were investigated using the open-top chamber (OTC) and transposing of surface soil with vegetation (TSSV) methods. The results were shown as follows: In Muyangchang, mean air temperature in the OTC raised by 2.2 ℃ at 1.0 m above the ground in the OTC during the growing season. Moreover, mean air temperature was 2.5 ℃ lower in timberline ecotone (3200 m) than versus in Muyangchang (2600 m). A. faxoniana seedlings in warming treatments showed earlier bud break, later bud dormancy and longer growing season. Unfortunately, severe freezing damage in current buds was detected in warming treatments. The results obtained in this study indicate that frost damage probably poses strong impact on the alpine species under future warming conditions.