Tree-related Microhabitats and Trees Outside Forest along the Urban-Rural Gradient in Kathmandu Valley

Babita Shrestha, B. K. Sharma, R. Yadav
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Abstract

Trees Outside Forests (TOF) are found in all strata as urban, suburban and rural. Some TOF serve as Tree Related Micro Habitats (TreMs). We conducted the assessment of TreMs on TOF in Kathmandu valley of central Nepal. Inventory was performed in 209 randomly selected points by Excel using circular plots with 20 m radius. Out of 6210 individuals of 150 tree species recorded from the study area, 1038 TOF of 64 species were found to serve as TreMs. 4 forms, 5 groups and 14 types of TreMs were recorded. Habitat types per tree varied from 1 to 6. 1, 2, 3, 4 and 5 habitat types were found in 665 (64.07 %), 293 (28.23 %), 67 (6.45 %), 8 (0.77 %) and 4 (0.38 %) trees respectively. 6 habitat types were found in one Cinnamomum camphora tree (0.10 %) with 8.60 m height and 75 cm DBH. Out of all the forms, groups and types, all were found in Urban TOF, one type (mistletoe) in suburban TOF and one form (fruiting bodies of saproxylic fungi and slime moulds) along with three types (mistletoe, invertebrate nest and sap run) were absent in rural TOF. The study explored the TreMs on TOF in Kathmandu valley. It provides the baseline data useful for micro habitats as well as biodiversity conservation.
加德满都谷地城乡梯度上与树木相关的微生境和林外树木
森林外树木(TOF)分布在城市、郊区和农村的各个阶层。一些TOF作为树木相关微栖息地(trem)。我们对尼泊尔中部加德满都谷地的TOF进行了TreMs评估。通过Excel随机选取209个点,采用半径为20 m的圆形图进行清查。在研究区记录的150种树种6210株中,发现64种树种的1038株TOF具有trem功能。记录4种形式、5组、14种trem。每棵树的生境类型从1到6种不等。分别有665棵(64.07%)、293棵(28.23%)、67棵(6.45%)、8棵(0.77%)和4棵(0.38%)存在1、2、3、4和5种生境类型。1棵樟树(0.10%),树高8.60 m,胸径75 cm,共有6种生境类型。所有形态、类群和类型均在城市TOF中发现,郊区TOF中有一种形态(槲寄生),农村TOF中没有一种形态(腐殖真菌和黏菌的子实体)以及三种形态(槲寄生、无脊椎巢和树液流)。该研究探索了加德满都谷地TOF上的TreMs。它为微生境和生物多样性保护提供了有用的基线数据。
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来源期刊
Journal of Plant Resources and Environment
Journal of Plant Resources and Environment Agricultural and Biological Sciences-Plant Science
CiteScore
0.60
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