摘要
间伐作为一种林业生产活动,将会对区域内的植物群落和动物种群及行为产生影响.为了解间伐对鼠类介导的种子扩散的影响,2012年4月在王屋山区选择未间伐和间伐林地作为样地,标记、释放山杏(Prunus armeniaca)种子,调查鼠类对种子扩散的影响.研究表明:1)未间伐区鼠类的捕获率为6.7%,间伐区为2.7%;2)间伐区乔木密度降低56.3%、灌丛密度降低72.7%;3)未间伐区种子的扩散速率(半存留时间2 d)显著快于间伐区(半存留时间10 d);4)未间伐区,鼠类对种子的埋藏深度为(4.3±0.1)cm,间伐区为(3.9±0.2)cm,二者差异显著;5)未间伐区,鼠类对种子的多次扩散率为20.3%,间伐区为4.4%,二者差异显著.结果显示,林木间伐导致林区生境和鼠类种群显著变化,造成鼠类贮食行为和种子命运发生改变,最终将影响林区的幼苗更新.
As a common management strategy in forestry production,thinning could have a significant impact and interference on phytocoenosium and forest animals,and subsequently affect animal-mediated seed dispersal and forest regeneration. To understand the potential influence of thinning on the process of rodent-mediated seed dispersal,a study was conducted in April 2012. Seeds of Prunus armeniaca were marked and tracked in un-thinning and thinning forest in Mt. Wangwu area. The results showed that: 1)the relative density of rodent population drastically reduced from 6. 7% in un-thinning forest to 2. 7% in thinning forest; 2) the density of tree and shrub in thinning forest decreases from 56. 3% to 72. 7%; 3)seed dispersal rate in un-thinning forest( half survival time: 2 days) was significantly higher than in thinning forest( half survival time: 10 days); 4) the difference of burying depth between un-thinning forest( 4. 3 ± 0. 1) cm and thinning forest( 3. 9 ± 0. 2) cm was significant; 5) more scatter-hoarded seeds were retrieved and buried again in un-thinning forest( 20. 3%) than in thinning forest( 4. 4%). These results suggested that thinning have inevitable influence on plant community structure and the seed dispersal behavior of rodents,and finally affect the seed fate and seedling recruitment.
出处
《郑州大学学报(理学版)》
CAS
北大核心
2016年第1期67-72,共6页
Journal of Zhengzhou University:Natural Science Edition
基金
国家重点基础研究发展计划项目(2007CB109106)