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作 者 ：马广礼;雷耘;汪正祥;尤冬梅

期 刊 ：武汉植物学研究 2008年 26卷 5期 页码：482-488

关键词：七姊妹山；泥炭藓沼泽；物种组成；植物多样性；生物量；

Keywords:Qizimei Mountains, Sphagnum mire, Species composition, Plant diversity, Biomass,

摘 要 ：以湖北宣恩县七姊妹山泥炭藓沼泽植被为研究对象,对其物种组成、群丛类型、植物群落生物量、物种重要值及多样性特征进行了分析。结果表明,该沼泽物种组成较为丰富,共计41科65属94种;沼泽植被可区分为9个群丛,其中泥炭藓(Sphagnum palustre ssp.palustre)、野灯心草(Juncus setchuensis)和堇菜(Viola verecunda)为9个群丛共有种。在9个群丛中,大理苔草-泥炭藓群丛(Ass.Carex taliensis-Sphagnum palustre ssp.palustre)的生物量最高,亮鞘苔草-泥炭藓群丛(Ass.Carex fargesii-Sphagnum palustre ssp.palustre)的生物量最低;泥炭藓的生物量占其所在群丛总生物量的74.78%~91.18%。泥炭藓的平均盖度为88.6%,在其中7个群丛中,泥炭藓的重要值大于其他物种的重要值。在群丛物种多样性指数中,丰富度指数(R)最高的为西南小叶地笋+庐山藨草-泥炭藓群丛(Ass.Lycopus coreanus var.cavaleriei+Scirpus lushanensis-Sphagnum palustre ssp.palustre),优势度指数(C)最高的为亮鞘苔草-泥炭藓群丛,多样性指数(H’)最高的为西南小叶地笋+野灯心草-泥炭藓群丛(Ass.Lycopus coreanus var.cavaleriei+Juncus setchuensis-Sphagnum palustre ssp.palustre),均匀度指数(J)最高的为野灯心草+宜昌苔草-泥炭藓群丛(Ass.Juncus setchuensis+Carex alliiformis-Sphagnum palustre ssp.palustre)。

Abstract:We investigated the vegetation of sphagnum mire at Qizimei Mountains in Western Hubei Province and analyzing the species composition,association types,biomass of plant communities,importance value of species and species diversity characteristics of each association.The results show that the species composition of the mire is relatively rich.94 species of plants,belonging to 65 genera of 41 families,were recorded.The mire vegetation can be divided into 9 associations.Sphagnum palustre ssp.palustre,Juncus setchuensis and Viola verecunda appears in all of the 9 associations.The biomass of Ass.Carex taliensis-Sphagnum palustre ssp.palustre is maximal while Ass.Carex fargesii-Sphagnum palustre ssp.palustre is minimal in 9 associations.The ratio of biomass of Sphagnum palustre ssp.palustre to total biomass of association is from 74.78% to 91.18%.The average coverage of Sphagnum palustre ssp.palustre in the mire is 88.6%.The importance value of Sphagnum palustre ssp.palustre is greater than that of other species in 7 associations.It is found that Ass.Lycopus coreanus var.cavaleriei+Scirpus lushanensis-Sphagnum palustre ssp.palustre possess the highest richness indices(R);Ass.Carex fargesii-Sphagnum palustre ssp.palustre possess the highest dominance indices(C);Ass.Lycopus coreanus var.cavaleriei+Juncus setchuensis-Sphagnum palustre ssp.palustre possess the highest diversity indices(H’);and Ass.Juncus setchuensis+Carex alliiformis-Sphagnum palustre ssp.palustre possess the highest evenness indices(J).

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