[题目]亚马孙河流域具有高大密集的以乔木为主的热带雨林群落.回答下列问题.[1]热带雨林生态系统区别于其他生态系统的优势表现在( ) ①光合作用强烈 ②生物循环旺盛 ③生产力高 ④养分集中在地上的植物体内A.①③④ B.①②③ C.①②④ D.②③④[2]热带雨林群落高大密集的原因是( ) ①热量充足 ②水分丰沛 ③生长季节连续 ④土壤肥沃A.①②③ B. 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】亚马孙河流域具有高大密集的以乔木为主的热带雨林群落。回答下列问题。

【1】热带雨林生态系统区别于其他生态系统的优势表现在( )

①光合作用强烈 ②生物循环旺盛 ③生产力高 ④养分集中在地上的植物体内

A.①③④ B.①②③ C.①②④ D.②③④

【2】热带雨林群落高大密集的原因是( )

①热量充足 ②水分丰沛 ③生长季节连续 ④土壤肥沃

A.①②③ B.①③④ C.②③④ D.①②④

【3】热带雨林中土壤贫瘠的原因是 ( )

有机质分解和养分再循环旺盛,土壤很少积累和补充养分

高温多雨,地表径流和淋溶作用带走养分

③热带雨林植被的吸收作用强烈

④岩石风化所释放的养分不足

A.①② B.③④ C.①③ D.②④

【答案】

【1】B

【2】A

【3】A

【解析】

试题分析：

【1】热带雨林地区全年水热充足，光合作用强烈，生物循环旺盛，但其主要的不利方面是养分主要集中在地上的植物体内，土壤养分很少。故选B。

【2】受热带雨林气候终年高温多雨的影响，水热条件充足，且生长季节连续是雨林森林茂密的主要原因，而土壤贫瘠不利于植被生长，④错误。故选A。

【3】雨林中生物循环旺盛，有机物合成速度快，当然雨林植物吸收作用强烈了。植物快速吸收了土壤中的养分，也是造成雨林土壤贫瘠的原因之一。故选A。

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