摘要:
通过对王朗自然保护区人工林的植被调查,分析人工林、次生林、原始林的群落结构特征及主食竹特征,研究 人工林是否恢复成为大熊猫适宜栖息地。结果表明:人工林中均未发现大熊猫活动痕迹。人工林的物种多样性、 物种优势度、栖息地盖度、植株数(H 5 m)等均高于原始林。群落高度、最大胸径、平均胸径、栖息地成熟度等均低 于原始林。从植物群落结构特征来看,人工林对上层林木结构恢复快,但密度大,胸径变异小,栖息地盖度偏高,限 制了林下植物物种的生长。人工林林下自然更新竹类密度小、生物量低,更新能力差。而人工种植竹类高度、盖度 均达不到大熊猫取食要求,且干扰严重。说明人工林未能恢复成为大熊猫适宜栖息地。
Abstract:
Based on the vegetation investigation of the plantation in Wanglang Natural Reserve, Sichuan Province of southwestern China, the community structure and the feeding bamboo characteristics in plantation, secondary forests, and the primary forests were analyzed in this paper. The purpose of the study was to test whether plantation could be recovered to a suitable habitat for the giant panda. The results showed that no trace of giant panda could be found in the plantation and the species diversity, species dominance, canopy coverage, and the tree number (H 5 m) under the plantation were all higher than those of primary forests. Whereas, the community height, maximum DBH, average tree DBH, and the habitat maturity under the plantations were all lower than those of primary forests. As for the community structure, the trees in the upper levels of plantation could recover soon. However, the growth of understory plants was limited by the canopy trees. In addition, the natural regeneration of bamboo under the plantation was poor. The height and coverage of planted bamboos could not meet the needs of giant panda, and what爷s worse, the plantation would bring about a second disturbance. In conclusion, the plantation is not the suitable habitat of giant panda
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