PART II SELECTED CURRENT ISSUES IN THE FOREST SECTOR Forests and poverty alleviation his chapter focuses on the role of forests, chapter specifies two types of poverty alleviation particularly natural ones, in poverty associated with forest resources, as seen at the

he term\biological diversity\entered the part of the broader set of criteria and indicators for public vocabulary only about 15 years ago, sustainable forest management but its arrival signalled a new and more Conserving biological diversity is an ethical comprehensive approach to conservation, bringing imperative because all life has a right to exist, and er information, knowledge, awareness, humans should not knowingly cause any loss of ethics, forestry, protected areas

interest in sustainable forest It concludes by suggesting how fiscal policies in anagement has grown, so ha as the the sector might be improved and offers importance of finding ways to finance it. Indeed, comments on the broader debate on financing one of the main points of agreement at various sustainable forest management. international meetings on forestry

EXPLANATORY NOTES GENERAL lia, Canada, Japan, New Zealand and the United States, thestem Country/area nomenclature and regional groups used in the volume for all living trees has been used for the volume figure Some variation as to the minimum diameter applied is reported The country/area names and order used in these tables follow in ECE/FAO (2000) standard UN practice regarding

在地形图上表示的主要内容有地物与地貌两大类。 地物:是指地球表面上的具有明显轮廓的各种固定物体,可以分 为自然地物与人工地物两类。如房屋、道路、森林等。 地貌:地面上高低起伏的形态称为地貌。如高山、深谷和平原等 地形:地物和地貌合称为地形

观赏植物在园林绿地、森林公园及风景 名胜区中应用的方式很多。没有一定的 固定的程式。 应用的原则是在满足植物生态习性的基 础上,最大限度的发挥其环境效益和美 学效益,最大限度的满足人们社会需求 和生活需求。 应用的方式主要为室外和室内两个方面

为什么进行核算? 1992年中国国民经济运行的全部环境成本损失至少有 1061.01-1310.42亿元,约占当年GDP的3.98%-4.92%,即 1992年中国国内生产总值中有3.98%4.92%的部分是以牺 牲环境取得的,损失排在前三位的为森林40%,水31%, 大气17%

地球上的每一种昆虫都占有适合其生存、繁衍后 代的空间和领地,都有一定的地理分布范围。 分布于同一个地理范围内的种常在食物、生活规 律、生栖环境、生态信息等方面具有区别于与它种的 特征。 这类地理分布格局和特征的形成,除与起源和进 化历程有关外,还和地球板块的运动、物种所在地的 气候、地理及植物群落的变化有关

1基本原理 昆虫种类、习性、形态虽然复杂多样,但与任何千差 万别的事物一样,总是存在特殊性与共同性的对立统一 关系。其进化是由低等到高等、由简单到复杂,起源于 共同祖先,相互之间存在或近或远的血缘联系,在进化 里程上有着连续性和间断性的对立统一关系

腹部是昆虫的第 三体段,9-12节 (包括尾节), 是昆虫新陈代谢和生殖中心,按机能的分: