Gombert S, Asta J, Seaward M R D
Muséum National d'Histoire Naturelle, Département RDDM, USM 505 Case 39, 57 rue Cuvier, 75005 Paris, France.
Environ Pollut. 2005 Jun;135(3):501-14. doi: 10.1016/j.envpol.2004.10.010.
In 1997 the ecological characteristics of the epiphytic species (83 lichens and two algae) of an urban area (Grenoble, France) were determined. Seven autecological indices were used to characterize the lichen ecology: illumination index, humidity index, pH of bark, nutrient status of substratum, ecological index of IAP and frequency. Six clusters (A1-A6) were defined using cluster analysis and principal component analysis. Seven environmental parameters characterizing the stations and the lichen releves were also used: elevation, parameters of artificiality (urbanization, traffic and local land use), IAP, and the percentage of nitrophytic and acidophytic species. Six clusters (B1-B6) were defined using cluster analysis and canonical correspondence analysis. Four clusters (C1-C4) were finally defined using an empirical integrated method combining the autecological and environmental parameters. This final clustering which established the status of the lichen vegetation in 1997 can be reliably used as a baseline study to effectively monitor environmental changes in this urban area.
1997年，对法国格勒诺布尔市区附生植物物种（83种地衣和两种藻类）的生态特征进行了测定。使用了七个个体生态学指标来表征地衣生态：光照指数、湿度指数、树皮pH值、基质养分状况、国际空气污染指数（IAP）生态指数和频度。利用聚类分析和主成分分析定义了六个聚类（A1 - A6）。还使用了七个表征采样点和地衣样方的环境参数：海拔、人为因素参数（城市化、交通和当地土地利用）、国际空气污染指数（IAP），以及嗜氮植物和嗜酸植物物种的百分比。利用聚类分析和典范对应分析定义了六个聚类（B1 - B6）。最后，采用一种结合个体生态学和环境参数的经验综合方法定义了四个聚类（C1 - C4）。1997年确定地衣植被状况的这一最终聚类结果可作为基线研究，用以有效监测该市区的环境变化。
