Rubina Karki, Sweta Dixit, S. K. Chaudhari, M. Dhamala, Sijar Bhatta, D. Khadka
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引用次数: 1
摘要
入侵物种对生物多样性的影响是一个世界性的重大问题。这项研究是在Shivapuri龙次郡国立公园进行的。本研究评估了与之相关的入侵物种状况因子及其对树木幼苗和幼树的影响。植被采样采用改进的Whittaker嵌套采样分层。在海拔1409 ~ 2140 m范围内共采集15个样地,195个子样地。研究地点共记录到32种乔木和9种入侵物种。松林的入侵物种盖度显著高于混交林(W = 3, p = 0.03),入侵物种较多的样地的入侵物种盖度显著高于单一入侵类型样地(W = 50, p = 0.009)。此外,盖度也受冠层盖度、践踏度和海拔高度的影响,但差异不显著。入侵物种对苗木、树苗数量及其多样性、物种盖度均有影响。我们建议清除这些入侵物种。
Richness and Impact of Invasive Alien Species Plant in Trees of Shivapuri Nagarjun National Park, Central Nepal
The effect of invasive species on biodiversity is a major issue of world. This study was conducted at the Shivapuri Nagarjun National Park. This study assessed the invasive species status factor associated with it and their impact on seedling and sapling of trees. Modified Whittaker Nested sampling stratifies was adopted for vegetation sampling. A total of 15 plots were taken with 195 subplots between 1409 m to 2140 m. altitudinal ranges. A total of 32 tree species and nine invasive species were recorded from the studied sites. The pine forest was having significantly (W = 3, p = 0.03) more coverage of invasive species than mixed forest, the coverage of invasive species was also significantly (W = 50, p = 0.009) more with more invasive species than plot with single invasive types. Beside this coverage was also affected by canopy cover, trampling and altitude but not significantly different. The invasive species have impact on numbers of seedling, sapling and their diversity species coverage. We recommend removing these invasive species.