As a general rule , forests dominated by angiosperms ( broadleaf forests ) are more species - rich than those dominated by gymnosperms ( conifer or needleleaf forests ) , although exceptions exist ( for example , species - poor aspen and birch stands in northern latitudes ) 作为普遍规则,受被子植物支配的森林(阔叶林)比那些受裸子植物支配的森林(松树或针叶林)物种丰富,虽然有例外存在(例如,种类匮乏的白杨和桦树生长在北纬度地区) 。
The aim of our investigation is to probe into the characteristics and changing trends of wintering birds community structure of mountainous secondary broadleaf forest , and provide scientific foundation for studying the role wintering birds community in ecosystem and the relation with environment 通过本次调查研究,旨在探讨山地次生阔叶林冬季鸟类群落结构的特点和变化趋势,为研究冬季乌类群落在生态系统中的作用及与环境的关系提供科学依据。
In this paper , two major types , the natural vegetation and crop vegetation in luota are studied . we can gain the different distributive area by remote sensing technology , in accordance with conifer forest , broadleaf forest , thick shrub forest , shrub forest , herbs shrub forest , herbs naked rock and crop vegetation . the valuation of the output of standing trees , water conserbancy , soil conserbation to control erosion and purify the air is the main basis which is used to value the functions of the forest ecosystem of the conifer forest and broadleaf forest of luotathe result reveal that the total ecological function value of the forest which area is 1388 . 8 hm2 is estimated up to 18 . 36 million yuan per annum . the synthetic valuation system of luota vegetation is put forward by the valuation of per hm2 in evergreen - deciduous forest , conifer forest , conifer and broadleaf forest , broadleaf forest , scatteredtree - shrub forest , coppice - shrub forest , herbs shrub forest , econamic crop and cereal crops . the plant resources is valued according to the ornamental and green plant . lumber trees and medical plant . ornamental plant includes hosta plantaginea . lilium brownii van viridulum , spiraea cantomiensis and so on . lumber tuees includes zzzelkova schneideriana , emmenopterys henryi , catalpa fargesii and so on 本文把洛塔现存植被分为自然植被与栽培植被两大类进行研究,通过遥感技术对现存植被按针叶林、阔叶林、密灌、灌丛、草灌、荒草裸岩、农作物植被等类型进行分布面积的统计,在此基础上,以林产品价值、涵养水源价值、保护土壤价值和净化空气价值作为估算的主要参考依据,对已成林的针叶林与阔叶林进行森林生态系统的价值估算,得出面积为1388 . 8hm ~ 2的针叶阔叶林的森林生态价值为1836 . 37万元,参照这一生态价值量,把洛塔植被按常绿落叶林、针叶林、针阔混交林、阔叶林、疏林?灌丛、矮灌丛、荒草灌丛、经济作物和粮食作物,以每hm ~ 2的价值量提出了洛塔植被的综合价值体系。
The author introduces and comments the academic achievements of japanese scholars in their exploration on the historical cultures of the minority nationalities in yunnan province , including fieldwork , the history of nanzhao and dali kingdoms , origin of wo ethnic group , the culture of syoyo evergreen broadleaf tree forests , myths , folklores folk beliefs and sacrifices 摘要介绍和评析了鸟居龙藏等日本学者对云南的田野调查、华南民族史、傣族史、南诏和大理国史、倭族之源、照叶树林文化、神话、民间故事、民间信仰和民间祭祀等方面的研究成果,并系统地分析了日本学者对云南少数民族历史文化研究的全貌、学术研究的轨迹及新动向。
Most of the pandas are distributed between 2 600 - 2 800 m ; 2 ) the pandas more often exploit the conifer - and - broadleaf - mixed forests and prefer to feed fargesia denudafa and more of their activities happen in forests where arrow bamboo grows better ; 3 ) the pandas avoid habitats where human disturbance is intensive ( x2 = 22 . 000 , df - 3 , p = 0 . 000 ) ; logging and livestock grazing significantly influence feeding habitats of pandas , while herb collecting and poaching has not . the giant pandas prefer the habitats where no human disturbance occurs . in conclusion , human activitires have intensively influenced feeding and other activities of the giant panda and its habitats 垂直主要分布在海拔2600 - 2800m范四川大学硕士学位论文围内; 2 )主要利用植被类型中的针阔混交林,选择有缺苞箭竹、而且缺苞箭竹生长良好的生境,对位置和森林起源这两个生境因素的不同水平,都是随机利用,没有表现出明显的偏好; 3 )大熊猫明显回避那些人类干扰强度大的生境( xz二22 . 000 , df = 3 , p = 0 . 000 ) ;伐木和放牧对大熊猫食竹的生长状态有明显影响,对发生采药和偷猎的生境没有明显回避;对于人类干扰强度大的生境,大熊猫利用频度很低,干扰弱或中等时,表现出随机利用;对于没有干扰的生境,是高频利用。
broadleafとは意味:{名} : 広葉{こうよう}タバコ broadleaf meaning: Adjective: broadleaf 'brod`leef Having relatively broad rather than needlelike or scalelike leaves - broad-leafed , broad-leaved See also: deciduous Encyclopedia: Broa...broadleaf 뜻:noun, 잎이 넓은 담배(엽궐련용)broadleaf перевод:1) широколистный табак (для сигар)