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Carbon cycling of alpine tundra ecosystems on Changbai Mountain and its comparison with arctic tundra 总被引：4，自引：0，他引：4
The alpine tundra on Changbai Mountain was formed as a left-over ‘island’ in higher elevations after the glacier retrieved
from the mid-latitude of Northern Hemisphere to the Arctic during the fourth ice age. The alpine tundra on Changbai Mountain
also represents the best-reserved tundra ecosystems and the highest biodiversity in northeast Eurasia. This paper examines
the quantity of carbon assimilation, litters, respiration rate of soil, and storage of organic carbon within the alpine tundra
ecosystems on Changbai Mountain. The annual net storage of organic carbon was 2092 t/a, the total storage of organic carbon
was 33457 t, the annual net storage of organic carbon in soil was 1054 t/a, the total organic carbon storage was 316203 t,
and the annual respiration rate of soil was 92.9% and was 0.52 times more than that of the Arctic. The tundra-soil ecosystems
in alpine Changbai Mountain had 456081 t of carbon storage, of which, organic carbon accounted for 76.7% whereas the mineral
carbon accounted for 23.3%. 相似文献
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长白山区天然红松阔叶林乔木种多样性变化 总被引：8，自引：1，他引：7
以长白山区红松阔叶林为研究对象,采用空间代替时间的方法,对于不同年度进行中度择伐后形成的天然次生林,进行群落学调查,并根据树高划分为主林层、中林层、更新层,分析和探讨了经过人为干扰以后的28年恢复期间乔木种多样性的变化动态。研究结果表明,经人为干扰后,天然次生林内林分的乔木种丰富度和Shannon多样性指数变化均较小,林分均匀度指数在择伐后的5年间迅速减小,直至第28年为止始终小于原始林;在28年恢复期间物种丰富度指数、Shannon指数、Pielou指数、Simpson指数在不同高度层的分布格局变化均较大,且同原始林相比相差较大;林分不同层内乔木树种的多样性变化动态较复杂。 相似文献
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