Fig 5 Some Epiphytes in rain forest or temperate forest
Fig.5 Some Epiphytes in rain forest or temperate forest
Example 3: Climatic and Ecological Change: Past and Future By Margaret Davis(1983, 1989 )at a lake in the Appalachiah Mountains. American Colonies 1740 MAIN Settled area, 1740 NEW YO Ass.Boston Philadelphia ATLANTIC NEW JERSEY DELAWARE OCEAN MARYLAND WIRGINIA NORTH CAROUNA LAND ROLINA GEORGIA vE
Example 3:Climatic and Ecological Change: Past and Future By Margaret Davis(1983,1989) at a lake in the Appalachiah Mountains
They used the pollens in the sediment of the lake to record the changes of plants living near the lake during the past several thousand years Some of the pollen produced by plants that live near a lake falls on the lake surface, sinks and becomes trapped in lake sediments. As the lakeside vegetation changes, the mix of pollen preserved in the sediment's also changes Pollen Figure. The vegetation 坚果 200 history of landscapes 烟枯萎病 can be reconstructed using the pollen contained within the a山毛榉 sediments of nearb 科 lakes 12000 云杉 The history of vegetation in the area can reflect the changes of climate in the area
Figure . The vegetation history of landscapes can be reconstructed using the pollen contained within the sediments of nearby lakes Some of the pollen produced by plants that live near a lake falls on the lake surface, sinks and becomes trapped in lake sediments. As the lakeside vegetation changes, the mix of pollen preserved in the sediment’s also changes. 云杉 山毛榉 科 坚果 枯萎病 The history of vegetation in the area can reflect the changes of climate in the area They used the pollens in the sediment of the lake to record the changes of plants living near the lake during the past several thousand years
第一章绪论 二、污染物与污染源 1、污染物 进入环境后使环境的正常组成发生直接或间接有害于生物生长、发育和繁 殖的变化的物质。 按来源分:自然来源污染物、人为来源污染物 大气污染物:So2、cO、CH4、粉尘、PM25、PM10、03等 按受影响 的环境要水污染物:酸、碱、需氧有机污染物、大肠杆菌等 素分 土壤污染物:重金属、持久性有机污染物等 化学污染物:无机污染物、有机污染物等 按污染物 性质 物理污染物:噪声、微波辐射、放射性污染物等 生物污染物:病原体、变应原污染物
第一章 绪论 二、污染物与污染源 1、污染物 进入环境后使环境的正常组成发生直接或间接有害于生物生长、发育和繁 殖的变化的物质。 按受影响 的环境要 素分 按来源分：自然来源污染物、人为来源污染物 大气污染物：SO2、CO、CH4、粉尘、PM2.5、PM10、O3等 水污染物：酸、碱、需氧有机污染物、大肠杆菌等 土壤污染物：重金属、持久性有机污染物等 按污染物 性质 化学污染物：无机污染物、有机污染物等 物理污染物：噪声、微波辐射、放射性污染物等 生物污染物：病原体、变应原污染物
按污染一次污染物:直接向环境排放的污染物 物在环 境中的 变化分 二次污染物:一次污染物进入环境后经过一系列物理、化 学和生物化学反应形成的污染物 按污染物对人体的作用分:致畸物、致突变物、致癌物、可吸入离子、恶 臭等。 根据环境中污染物浓度、出现频率和毒性:一般污染物、优先控制污染物 中国优先污染物名单 卤代烃、苯系物、氯代苯类、多氯联苯类、酚类、硝基苯类、苯胺类、 多环芳烃、酞酸酯类、农药、丙烯腈、亚硝胺类、氰化物、重金属及其 化合物
按污染 物在环 境中的 变化分 一次污染物：直接向环境排放的污染物 二次污染物：一次污染物进入环境后经过一系列物理、化 学和生物化学反应形成的污染物 按污染物对人体的作用分：致畸物、致突变物、致癌物、可吸入离子、恶 臭等。 根据环境中污染物浓度、出现频率和毒性：一般污染物、优先控制污染物 中国优先污染物名单 卤代烃、苯系物、氯代苯类、多氯联苯类、酚类、硝基苯类、苯胺类、 多环芳烃、酞酸酯类、农药、丙烯腈、亚硝胺类、氰化物、重金属及其 化合物