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首页> 外文期刊>Ecological research >Quantitative analysis of a stand of Pinus densiflora undergoing succession to Quercus mongolica ssp. crispula: Ⅱ. Growth and population dynamics of Q. mongolica ssp. crispula under the P. densiflora canopy
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Quantitative analysis of a stand of Pinus densiflora undergoing succession to Quercus mongolica ssp. crispula: Ⅱ. Growth and population dynamics of Q. mongolica ssp. crispula under the P. densiflora canopy

机译:樟子松接生蒙古栎(M. Quercus mongolica ssp)的林分的定量分析。薄脆片:Ⅱ。蒙古栎的生长和种群动态P. densiflora冠层下的crispula

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We report here the results of an 8-year study of the growth and population dynamics of Quercus mongolica ssp. crispula in a Pinus densiflora stand in a state of succession. In 1998, there were 169 Q. mongolica ssp. crispula individuals in a 400-m~2 plot under the P. densiflora canopy. This number remained nearly constant between 1998 and 2005. Mean recruitment of new individuals was 11 year~(-1), while mean mortality was 12 year~(-1). Of the 35 individuals ≥60 cm in height existing in 1998, 30 were still surviving in 2005. We were able to represent the height growth of Q. mongolica ssp. crispula individuals as H=30 [1 + 21.96 exp(-0.08390]~(-1), with t = years since 1998 and H = height in meters. Using this equation we predict that by 2015 the mean height of Q. mongolica ssp. crispula trees in the stand will exceed those of understory trees, such as Rhus trichocarpa and Prunus maximowiczii. Once above the understory stratum, the Q. mongolica ssp. crispula trees can be expected to grow more rapidly due to the better light conditions, thereby rapidly reaching the canopy stratum of the P. densiflora stand.
机译:我们在这里报告蒙古栎生长和种群动态的8年研究结果。松树中的脆皮处于演替状态。在1998年,有169个Q. mongolica ssp。在P. densiflora冠层下400 m〜2地块内的栗树个体。在1998年至2005年之间,这一数字几乎保持不变。平均新招募人员为11年(-1),而平均死亡率为12年(-1)。在1998年存在的35个身高≥60 cm的个体中,有30个在2005年仍然存活。我们能够代表蒙古Q. ssp的身高增长。薄脆菌个体,H = 30 [1 + 21.96 exp(-0.08390]〜(-1),t = 1998年以来的年数,H =以米为单位的高度,使用此方程,我们可以预测到2015年蒙古扁桃的平均高度林分中的栗树将超过林木,如Rhus trichocarpa和Prunus maximowiczii,一旦进入林下地层,由于光照条件的改善,蒙古扁桃(Q. mongolica ssp。)栗树将生长得更快。迅速达到P. densiflora林分的冠层。

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