城市森林生态保健功能表征因子之间的关系  

Relationships between the factors reflecting ecological health function of urban forests

作　　者：郭二果[1,2,3,4] 王成[1,2] 郄光发[1,2] 蔡煜 

机构地区：[1]中国林业科学研究院林业研究所国家林业局森林培育重点实验室,北京100091 [2]国家林业局城市森林研究中心,北京100091 [3]呼和浩特市环境科学研究所,呼和浩特010030 [4]呼和浩特市环境监测中心站,呼和浩特010030

出　　处：《生态学杂志》2013年第11期2893-2903,共11页Chinese Journal of Ecology

基　　金：林业公益性行业科研专项(201304301-05);国家十二五科技支撑计划重大项目(2011BAD38B03)资助

摘　　要：对北京西山3种典型游憩型城市森林4项生态保健功能表征因子(降低空气颗粒物浓度、减少空气微生物含量、增加空气负离子水平、增加生物活性有机挥发物(biogenic volatile organic compounds,BVOCs)含量)进行一年四季24 h昼夜观测,分析几项生态保健功能因子之间的相互关系。结果发现,游憩林内与生态保健有关的几个因子相互间存在着密切关系:(1)4种粒径空气颗粒物均呈显著正相关,其中PM2.5与PM1.0的相关性最高,其次为总悬浮颗粒物(total suspended particulate,TSP)和PM10,粒径大小的差异越大,相关性越小。(2)空气细菌与空气颗粒物特别是TSP呈显著正相关。(3)空气负离子与空气颗粒物呈负相关,且颗粒物粒径越大二者负相关越显著。(4)空气负离子具有抑菌作用,对空气细菌的抑制效果较真菌明显。(5)侧柏林和黄栌林内的BVOCs在一定程度上能抑制空气微生物、增加空气负离子,与空气颗粒物也存在一定关系,具体效应因不同挥发物成分而异。A 24-hour seasonal observation was conducted on the 4 factors reflecting urban forest ecological heath function （decreasing atmospheric particulate matters （PMs） , declining airborne microbes, increasing aero-anions, and increasing biogenic volatile organic compounds （BVOCs） ） in three typical urban forests in West Mountain of Beijing, and an analysis was made on the interrelationships between these factors, aimed to understand the ecological health function of urban forest. There existed close relationships between these four factors. The four sizes of atmospheric PMs had significant positive relationships each other, among which, PM2.5 and PMi.0 had the highest correlation, followed by total suspended particulate （TSP） and PM10. The larger the difference in particulate size, the weaker the correlation was. The airborne bacteria were sig nificantly positively correlated with the PMs, especially with the TSP. The aero-anions had a neg ative relationship with the PMs, and this relationship became stronger when the particulate size increased. The aero-anions had inhibitory effect on the airborne microbes, and this effect was more obvious on bacteria than on fungi. In Platycladus orientalis and Cotinus coggygria forests, BVOCs played definite roles in inhibiting airborne microbes and increasing aero-anions, and also, had definite association with PMs, but these effects varied with the components of BVOCs.

关 键 词：城市森林 空气颗粒物 空气负离子 空气微生物 BVOCs 相互关系 

分 类 号：X513[环境科学与工程—环境工程]