Comparative abilities of vegetative regeneration among aquatic plants growing in disturbed habitats
Comparative abilities of vegetative regeneration among aquatic plants growing in disturbed habitats
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DOI：
10.1016/s0304-3770(97)00091-0
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发表时间：
1998-03-01
期刊：
影响因子：
1.8
通讯作者：
Hering-Vilas-Boas, A
中科院分区：
文献类型：
--
作者：
Barrat-Segretain, MH;Bornette, G;Hering-Vilas-Boas, A
6种水生植物（Elodea canadensis Michaux, Hippuris vulgaris L., Luronium natans (L.)）的营养片段的再生（再生成活植物）和定殖（在沉积物中建立）能力Rafin。通过室内试验，比较了法国罗纳河（Rhone River）沿岸频繁受洪水干扰生境中发生的赤豆（Potamogeton pusillus L.）、毛毛茛（Ranunculus trichophyllus Chair）、沙棘（Sparganium emersum Rehm.）。从植物中收集了6种类型的植物碎片，并将其放置在沉积物上的水中。在10周内记录了它们的发育和/或在沉积物中生根。不同物种在破碎后表现出不同的生存策略：(1)Sparganium和Ranunculus的碎片在沉积物中迅速生根，(2)Luronium、Hippuris和Elodea的碎片在实验的10周内发育了许多可以分散的繁殖体，但没有建立起来。pusillus的片段既没有建立也没有再生。结果表明，再生和定植之间存在着一种权衡关系，这种权衡关系与该物种被清除的斑块的再定植模式及其生态需求有关。这些物种在经常受到洪水干扰的生态系统中得以维持，部分原因是它们具有较高的再生能力，并从生活史特征和生态策略方面进行了讨论。(C) 1998爱思唯尔科学有限公司
The regeneration (regrowth into viable plants) and colonisation (establishment in the sediment) abilities of vegetative fragments of six aquatic plant species (Elodea canadensis Michaux, Hippuris vulgaris L., Luronium natans (L.) Rafin., Potamogeton pusillus L., Ranunculus trichophyllus Chair, Sparganium emersum Rehm.) occurring in habitats frequently disturbed by floods along the Rhone River (France) were compared through a laboratory experiment. Six types of plant fragments were collected from the plants and placed in water over sediment. Their development and/or their rooting into the sediment were recorded over 10 weeks. The species exhibited different survival tactics to survive after fragmentation: (1) fragments from Sparganium and Ranunculus developed roots and rapidly established into the sediment whereas (2) fragments from Luronium, Hippuris and Elodea developed many propagules that could be dispersed but did not establish within the 10 weeks of the experiment. The fragments of P. pusillus never established nor regenerated. The results showed a trade-off between regeneration and colonisation related to the patterns of recolonisation of cleared patches of the species and their ecological requirements. Maintenance of these species in ecosystems frequently disturbed by floods can partly be explained by their high regeneration abilities, and results are discussed in terms of life-history traits and ecological strategies. (C) 1998 Elsevier Science B.V.