贵阳市区树木附生苔藓植物的种类及大气净度指数

为了摸清贵阳市区树木附生苔藓植物的种类,为应用苔藓植物监测贵阳市大气污染状况提供参考,采用实地考察、定点取样和标本鉴定相结合的方法,于2011年8—11月对贵阳市树木附生苔藓植物的种类、盖度、频度等指标进行调查,并分析其大气净度指数。结果表明:贵阳市区树木附生苔藓植物共19科38属79种(包括亚种、变种),苔类植物4科5属12种,藓类植物15科33属67种;大气净度指数(IAP)为0.63～18.67;大气污染情况,白云区、金阳区为清洁区,IAP最高,为10.67～18.67;云岩区、花溪区次之,IAP值为3.05～9.54;小河区、南明区、乌当区的污染相对较重,IAP值最小,为0.63～2.53;狭叶小羽藓和鳞叶藓的分布范围较广、生长较好,可作为监测贵阳市区大气污染状况的苔藓植物。

Species of Epiphytic Bryophytes and Index of Atmospheric Purity in Guiyang City

In order to investigate epiphytic bryophytes species and provide references for using bryophytes to monitor Guiyang’s air pollution.An investigation on indicators,including species,frequency and coverage of epiphytic bryophytes was conducted by the methods of field investigation,spot sampling and specimen verification from August to November in 2011.Meanwhile,the index of atmospheric purity was analyzed.The results showed that they belonged to 79 species(including subspecies and variation) of 38 genera,19 families,including 12 liverworts species of 5 genera,4 families and 67 moss species of 33 genera,15 families.The IAP was between 0.63 and 18.67,which was the highest in Baiyun District and Jinyang District(10.67~18.67),followed by Yunyan District and Huaxi District(3.05~9.54),the lowest IAP was in Xiaohe District,Nanming District and Wudang District(0.63~2.53).Haplocladium angustifolium and Taxiphyllum taxirameum were widely distributed and grew very well,so they could be used to monitor Guiyang’s air pollution.