Epiphytic lichens as indicator of land-use pattern and forest harvesting in a community forest in west Nepal

Botanica Orientalis: Journal of Plant Science Pub Date : 2012-03-02 DOI:10.3126/BOTOR.V8I0.5555

P. Nag, Himanshu Rai, D. Upreti, Sanjeeva Nayaka, R. Gupta

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引用次数: 2

Abstract

Human inhabitance and agriculture have fundamentally altered global pattern of biodiversity and ecosystem processes. Therefore, integration of community-based approach is an effective conservation strategy. Community forestry is an important community-based approach, which can help in conserving local ecological assets in a sustainable manner. Lichens are known to be more sensitive indicators of ecosystem functions and disturbances than any other cryptogam and vascular plant community. Present study reports a preliminary assessment of epiphytic lichens in a community forest in Dadeldhura district, west Nepal, in order to identify potential indicator of forest health and land-use pattern. Epiphytic (corticolous) lichens were sampled from ten land-use units (LUU), using narrow frequency grids of 10 cm × 50 cm, each divided into five sampling units of 10 cm × 10 cm, on the bark of selected tree species. Quercus leucotrichophora was the dominant phorophyte followed by Pinus roxburghii , Rhododendron arboreum and Myrica esculenta . Foliose parmeloid ( Parmotrema spp., Heterodermia spp., Hypotrachyna spp., Bulbothrix spp., Canoparmelia spp., Canomaculina spp.) was the most abundant lichen group, found inhabiting all the phorophytes followed by crustose, fruticose and dimorphic growth forms. Maximum diversity of parmeloid lichens was recorded on older stand of Quercus while younger stands usually harbored crustose lichens (e.g., Lecanora spp., Basidia spp.). Though the lichen diversity increased from outer fringes of the forest to the core, the vegetation stand age was not distributed in any consistent pattern suggesting unconstrained harvesting of the forest. Lichen diversity was found constrained by phorophyte determinants (stand age, aspect, and bark properties) and community harvesting of the forest. doi: http://dx.doi.org/10.3126/botor.v8i0.5555 Botanica Orientalis – Journal of Plant Science (2011) 8: 24-32

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附生地衣对尼泊尔西部社区森林土地利用模式和森林采伐的指示作用

人类居住和农业从根本上改变了全球生物多样性格局和生态系统进程。因此，以社区为基础的整合方法是有效的保护策略。社区林业是一种重要的以社区为基础的方法，可以帮助以可持续的方式保护当地的生态资产。地衣被认为是比任何其他隐生植物和维管植物群落更敏感的生态系统功能和干扰指标。本研究报告了对尼泊尔西部达德尔杜拉地区社区森林附生地衣的初步评估，以确定森林健康和土地利用模式的潜在指标。在10个土地利用单元(LUU)内，采用10 cm × 50 cm的窄频率网格，每个采样单元分为5个采样单元(10 cm × 10 cm)，在选定树种的树皮上采集附生地衣。白毛栎为优势植物，其次为刺梨松、杜鹃花和杨梅。Foliose parmeloid (Parmotrema spp.， Heterodermia spp.， Hypotrachyna spp.， Bulbothrix spp.， Canoparmelia spp.， Canomaculina spp.)是最丰富的地衣类群，分布在所有植生植物中，其次是壳生植物、果生植物和二形植物。栎老林分的壳状地衣多样性最高，年轻林分的壳状地衣多样性最高(如Lecanora、Basidia等)。地衣多样性由林外边缘向林内核心逐渐增加，但林分年龄分布不一致，表明森林采伐不受限制。地衣多样性受植体决定因素(林龄、林向和树皮性质)和群落采伐的限制。doi: http://dx.doi.org/10.3126/botor.v8i0.5555 Botanica Orientalis - Plant Science (2011) 8:24 -32

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Botanica Orientalis: Journal of Plant Science

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