在西双版纳勐仑地区,以黄胸鼠为研究对象,在半自然围栏条件下,调查比较了黄胸鼠对假海桐和截头石栎两种种子贮藏和取食的差异。采用SPSS for Windows(version 16.0)对数据进行统计分析。结果表明:1)黄胸鼠主要以集中方式贮藏食物,对两...在西双版纳勐仑地区,以黄胸鼠为研究对象,在半自然围栏条件下,调查比较了黄胸鼠对假海桐和截头石栎两种种子贮藏和取食的差异。采用SPSS for Windows(version 16.0)对数据进行统计分析。结果表明:1)黄胸鼠主要以集中方式贮藏食物,对两种种子均未表现出分散贮藏方式;2)在实验的第2天(自由选择情况下),分别有20.8%的假海桐种子和39.2%的截头石栎种子被集中贮藏,黄胸鼠明显倾向于选择贮藏截头石栎种子(P<0.05),分别有4.2%的假海桐种子和0.8%的截头石栎种子被就地取食,但差异不显著(P=0.109);3)贮藏食物被盗窃使黄胸鼠的食物贮藏行为增强,而且对喜好食物(截头石栎种子)的集中贮藏量显著增多(P<0.01)。研究结果表明种子大小、种皮厚度影响鼠类对种子的贮藏和取食;提示黄胸鼠在野外条件下对假海桐和截头石栎两种树木的自然更新起着消极作用。展开更多
Acorns of Quercus aliena var. acuteserrata Maxim. are often predated by small mammals and birds in natural forests. These animals not only eat the acorns during the acorn ripening season, but also cache and hoard most...Acorns of Quercus aliena var. acuteserrata Maxim. are often predated by small mammals and birds in natural forests. These animals not only eat the acorns during the acorn ripening season, but also cache and hoard most of the remaining acorns on the forest floor in the soil for their future use. These buried acorns form the main seed resource for regeneration. Burying depth is potentially important for germination and for seedling development. The effects of burying depth on germination and seedling development in relation to acorn size were studied in an experiment, in which acorns were planted at 6 cm-, 12 cm- and 18 cm-depth. The experimental results showed that fewer acorns germinated as burying depth increased. From the deeply buried acorns fewer seedlings emerged at later time than from those acorns buried less deeply. They appeared to have more difficulties to emerge above-ground than die seedlings from shallowly buried acorns. The deeply buried acorns and their seedlings also appeared to be more susceptible to rot. Acorn size did not significantly affect germination and emergence of the seedlings. As early emerged seedlings had longer developmental periods in their first growing season, and therefore grew better than die late emerged seedlings, seedlings from die shallowly buried acorns took the advantage.展开更多
基金the grantsfromthe NSFC Key Project (No.30430130) ,the Key Project (No.G2000046802) of the Ministry ofScience and Technology of China ,and the Key Project (No.KSCX2-SW-103) of the Chinese Academy of Sciences
文摘在西双版纳勐仑地区,以黄胸鼠为研究对象,在半自然围栏条件下,调查比较了黄胸鼠对假海桐和截头石栎两种种子贮藏和取食的差异。采用SPSS for Windows(version 16.0)对数据进行统计分析。结果表明:1)黄胸鼠主要以集中方式贮藏食物,对两种种子均未表现出分散贮藏方式;2)在实验的第2天(自由选择情况下),分别有20.8%的假海桐种子和39.2%的截头石栎种子被集中贮藏,黄胸鼠明显倾向于选择贮藏截头石栎种子(P<0.05),分别有4.2%的假海桐种子和0.8%的截头石栎种子被就地取食,但差异不显著(P=0.109);3)贮藏食物被盗窃使黄胸鼠的食物贮藏行为增强,而且对喜好食物(截头石栎种子)的集中贮藏量显著增多(P<0.01)。研究结果表明种子大小、种皮厚度影响鼠类对种子的贮藏和取食;提示黄胸鼠在野外条件下对假海桐和截头石栎两种树木的自然更新起着消极作用。
文摘Acorns of Quercus aliena var. acuteserrata Maxim. are often predated by small mammals and birds in natural forests. These animals not only eat the acorns during the acorn ripening season, but also cache and hoard most of the remaining acorns on the forest floor in the soil for their future use. These buried acorns form the main seed resource for regeneration. Burying depth is potentially important for germination and for seedling development. The effects of burying depth on germination and seedling development in relation to acorn size were studied in an experiment, in which acorns were planted at 6 cm-, 12 cm- and 18 cm-depth. The experimental results showed that fewer acorns germinated as burying depth increased. From the deeply buried acorns fewer seedlings emerged at later time than from those acorns buried less deeply. They appeared to have more difficulties to emerge above-ground than die seedlings from shallowly buried acorns. The deeply buried acorns and their seedlings also appeared to be more susceptible to rot. Acorn size did not significantly affect germination and emergence of the seedlings. As early emerged seedlings had longer developmental periods in their first growing season, and therefore grew better than die late emerged seedlings, seedlings from die shallowly buried acorns took the advantage.
