桂北动物物候气候变暖响应

对桂北地区1989~2007年青蛙、蟋蟀始鸣和终鸣以及气温等气候要素1975~2007年同步观测资料的对比分析结果表明,近10年来桂北地区青蛙和蟋蟀始鸣日期呈提前趋势,终鸣日期稳定,始终鸣间隔期及生长繁殖季显著延长;桂林雁山近34年来年平均气温呈显著上升趋势,特别是1997年以来增温显著,在增温过程中以春季增温为主,冬季和秋季增温次之,夏季呈弱降温趋势;2~4月平均气温和3月平均最高气温是影响青蛙和蟋蟀始鸣期和始终鸣间隔期的主要气候生态因子;动物物候变化是动物对气候变暖的响应。

Responses of Animal Phenology to Climate Warming in Northern Guangxi

A contrastive analysis is made of the frog and cricket phenological phases from 1989 to 2007 and meteorological data from 1975 to 2007 in the northern Guangxi.The results indicate that the dates of beginning chirps of frogs and crickets exhibited an advancing trend;those of ending chirps kept unchanged,and the beginning-ending intervals had an obvious extending trend.The mean annual temperature presented a markedly increasing trend in the last 34 years in the Yanshan Mountains,especially in the last 10 years,mainly in spring.The February-to-April mean temperature and March mean maximum temperature are the main climatic factors that impact the dates of beginning and ending chirps of frogs and crickets and the intervals.The changes of animal phenology are the responses of animals to climate warming.