季节变化对锐齿栎种子扩散的影响  

Effects of seasonal change on dispersal of Quercus aliena seeds

作　　者：常罡[1,2,3] 邰发道[1] 

机构地区：[1]陕西师范大学生命科学学院,西安710062 [2]陕西省动物研究所,西安710032 [3]农业虫害鼠害综合治理研究国家重点实验室,北京100101

出　　处：《生态学杂志》2011年第1期189-192,共4页Chinese Journal of Ecology

基　　金：中国博士后科学基金项目(20090451366);中央高校基本科研业务费专项(GK200902035);农业虫害鼠害综合治理研究国家重点实验室开放研究基金项目(ChineseIPM1004);陕西师范大学青年科技项目(200901008)资助

摘　　要：季节变化是影响鼠类扩散植物种子的一个主要环境因素。2008年9—11月(秋季)和2009年3—4月(春季)分别在秦岭南坡的佛坪国家级自然保护区内调查了森林鼠类对锐齿栎种子的扩散,并与种子大小年假说的预测进行了比较分析。结果表明:春季锐齿栎种子的扩散速度比秋季快,平均扩散距离(取食距离和贮藏距离)也比秋季远,该结果与种子大小年假说的预测相反;春季锐齿栎种子的贮藏率比秋季低,该结果与种子大小年假说的预测相同。Seasonality is a key environmental factor affecting the seed dispersal by rodents. From September to November （autumn） in 2008 and from March to April （spring） in 2009, investigations were made on the dispersal of Quercus aliena seeds by forest rats in the Foping National Nature Reserve on south slope of Qinling Mountains, and the results were compared with the prediction from mast seeding hypothesis. It was shown that 1 ） the seed dispersal speed was significantly faster in spring than in autumn, and the mean dispersal distance （eating distance and hoarding distance） was also farther in spring than in autumn, being contrary with the prediction from mast seeding hypothesis, and 2） the hoarding proportion was significantly lower in spring than in autumn, which was consistent with the prediction from mast seeding hypothesis.

关 键 词：锐齿栎 季节变化 种子大小年 种子贮藏 扩散距离 

分 类 号：Q948[生物学—植物学]