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首页> 外文会议>International Symposium on Aquatic Weeds >Morphological variation in Eichhornia azurea (Kunth) and Eichhornia crassipes (Mart.) Solms in relation to aquatic vegetation type and the environment in the floodplain of the Rio Parana, Brazil
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Morphological variation in Eichhornia azurea (Kunth) and Eichhornia crassipes (Mart.) Solms in relation to aquatic vegetation type and the environment in the floodplain of the Rio Parana, Brazil

机译：Eichhornia azurea（Kunth）和Eichhornia Crassipes（Mart.）溶解与水生植被类型和Rio Paraana，巴西的洪泛区环境中的形态学变异

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摘要

Eichhornia azurea and E. crassipes are the most frequent dominants of aquatic vegetation in the floodplain of the Upper Rio Parana in Brazil. Morphological traits of samples collected at sites where they dominated the vegetation were measured and compared between vegetation types identified in the floodplain. Total leaf weight, specific leaf area and the leaf to root weight ratio of E. azurea and total leaf dry weight, total leaf area and total plant dry weight of E. crassipes differed significantlybetween vegetation types from 1999. Pearson correlation coefficients indicated a number of significant relationships between morphological traits and environmental variables. Five E. azurea traits increased linearly with water depth and four with water clarity. The leaf to root weight ratio also increased linearly with sediment iron and calcium content. E. crassipes total root dry weight and total plant dry weight were respectively quadratically related to sediment calcium and the euphotic proportion of the water column. Total leaf dry weight and total plant dry weight increased linearly with water depth while remainder dry weight decreased linearly with sediment phosphorus content.
机译：Eichhornia Azurea和E.沉思群是巴西上部里约Parana洪泛区中最常见的水生植被主导地位。测量植被占据植被的位点上收集的样品的形态特征，并比较了洪泛区中鉴定的植被类型。总叶片重量，特异性叶面积和叶片与E. azurea的根系重量比，总叶片干重，总叶面积和植物总干重的E.沉默沉默不同1999年的植被类型差异。Pearson相关系数表示一些形态特征与环境变量之间的显着关系。五种E.Azurea特征随着水深和四个水清晰度而导致线性增加。叶片对重量比也与沉积物铁和钙含量线性增加。 E.沉默根系干重和总植物干重分别与沉积物钙和水柱的Euphotic比例相正。总叶片干重和总植物干重随着水深而线性增加，而剩余的干重与沉积物磷含量线性降低。

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