[题目]下列为南亚.东南亚森林面积变化表.读表.完成下题.分区域面积年度变化年变化率(%)1900200020051990~20002000~20051990~20002000~2005南亚775517967879239213-880.27-0.11东南亚245605217702203887-2790-2763-1.20-1.30[1]南亚.东南亚区域森林面积变化的形成原因及治理措施题目和参考答案——青夏教育精英家教网—

题目内容

【题目】下列为南亚、东南亚森林面积变化表。读表，完成下题。

分区域	面积（1000公顷）			年度变化（1000公顷）		年变化率（%）
分区域	1900	2000	2005	1990~2000	2000~2005	1990~2000	2000~2005
南亚	77551	79678	79239	213	-88	0.27	-0.11
东南亚	245605	217702	203887	-2790	-2763	-1.20	-1.30

【1】南亚、东南亚区域森林面积变化的形成原因及治理措施是

人口的快速增加，持续对种植业的依赖导致毁林开垦

经济快速增长下的采矿、基础设施建设和城市化发展等，占据大量林地

封山育林是恢复森林面积最快的措施

利用现代科技改良树种是防止森林破坏的有效途径

A． B． C． D．

【2】南亚、东南亚区域森林面积这种变化趋势对环境的影响有

A．土壤含水率上升

B．地下水储量增加

C．地表径流变化率减小

D．生物多样性减少

【答案】

【1】A

【2】D

【解析】

试题解析：

【1】南亚、东南亚人口稠密、增长快，经济虽快速发展但平均水平较低，导致毁林开垦和采矿、基础设施建设和城市化发展等毁林现象并存。植树造林是恢复森林面积最快的措施；毁林主要是人为的砍伐，良种对此无效。选A。

【2】森林减少，会造成涵养水源能力下降、土壤含水率下降、地下水储量减小、地表径流变化率增加。选D。

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