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首页> 外文期刊>Pakistan journal of botany >Description of community types from different habitats around Karachi, Pakistan
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Description of community types from different habitats around Karachi, Pakistan

机译：巴基斯坦卡拉奇周围不同栖息地的社区类型的描述

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Phytosociological sampling was conducted at six different habitats around Karachi using quadrat method. On the basis of floristic composition and dominant species, 17 community types were recognized. Maximum water holding capacity, organic matters, CaCO 3 , pH, TDS, salinity and conductivity of soils belong to each stand were determined. Each habitat showed different values of water holding capacity, salinity and CaCO 3 . Highest (44%) water holding capacity, organic matter (9%) and salinity (8.23ppm) was recorded from Tidal zone with gradual decrease in saline waterlogged area, alluvial plain to rocky plain. Highest amount of CaCO 3 was recorded from rocky area. It is shown that alluvial plain to dry stream similar floristic composition i.e . Euphorbia caducifolia- Commiphora wightii- Prosopis juliflora, with Capparis decidua, Ziziphus nummularia were recorded in many sites. Stands belonged to different habitats were clearly separated out on two dimentional Bray-Curtis stand ordination. All the three ordination axes showed significant correlations with many edaphic factors. Salinity and electrical conductivity showed highly significant correlation with axes 1 and 3. Once widely distributed climatic climax species Prosopis cineraria was recorded in a few places with low Importance value index. It is concluded that due to anthropogenic disturbances and aggressive growth of Prosopis juliflora , natural vegetation has altered considerably.
机译：使用四边法法以六种不同的栖息地进行植物杂志采样。在植物组成和主导物种的基础上，认可17种社区类型。确定了最大水持有能力，有机物，Caco 3，pH，TDS，盐度以及各种支架的良性。每个栖息地显示出不同的水持有能力，盐度和Caco 3值。最高（44％）水持有能力，有机物（9％）和盐度（8.23ppm）从潮汐区记录盐水涝渍区域逐渐减少，对岩石平原急剧下滑。从岩石区域记录最高量的Caco 3。结果表明，对干流的冲积平面类似的植物组合物。 Ziziphus Nummularia的Ziziphus NumMularia Ziziphus Nummularia的大戟热玉米莫洛拉 - Prosopis Juliflora被录制在许多地点。属于不同栖息地的立场是在两个Dimentional Bray-Curtis支架秩序中清楚地分开。所有三个排序轴都显示出与许多助性因素有关的重要相关性。盐度和导电性显示出与轴1和3的高度显着相关性。一旦广泛分布的气候高潮物种ProsoPis Cineraria被记录在一个具有低重要性指数的几个地方。结论是，由于人为紊乱和Prosopis Juliflora的激进生长，自然植被大大改变了。

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