Over de oecologie van bloeiende Lemna trisulca
Over de oecologie van bloeiende Lemna trisulca
复制标题
三苏青萍生态学
作者：
C. D. Hartog
在泽兰省的三个地方发现了开花的小茴香。营养植物完全被淹没，对空中生活没有任何适应（水蛭属）。由于它们的叶子含有细胞内的空气空间，并且气孔发育，可育的植物上升到表面并在表面漂移。花序是雌雄同株的。授粉是通过一株植物坚硬弯曲的雄蕊与另一株植物的短花柱直接接触进行的。接触很容易，因为风、水流和移动的动物不断地改变叶子的位置，叶子通常是密密的。该物种在相对较小的水域中处于最佳状态，在那里它可以免受风和波浪的影响，并且可以在没有漂浮植物或有根植物的漂浮叶子竞争的情况下发展大量的植被，殖民水的自由空间。该物种形成了一个单特异性的植物群落——三叶柠檬，它必须与流状柠檬一起归入三叶柠檬，即水草属水生植物群落的联盟。
Flowering Lemna trisulca has been found in three localities in the province of Zeeland. The vegetative plants are completely submerged and do not show any adaptation to aerial life (ricciellids). The fertile plants rise to and drift on the surface, as their fronds contain intracellular air spaces, and stomata are developed (lemnids). The inflorescences are proterandrous. Pollination takes place by direct contact of the stiff curved stamens of the one plant with the short style of an other plant. Contacts are easily made, as wind, water currents and moving animals continually shift the position of the fronds, which usually are densely packed. The species has its optimum in relatively small waters, where it is sheltered from wind- and waveaction, and where it can develop mass vegetations colonizing the free space of the water without competition from floating plants or floating leaves of rooting plants. The species forms a monospecific plant association, Lemnetum trisulcae, which has to be classified together with the Riccietum fluitantis into the Lemnion trisulcae, the alliance of the ricciellid water-plant communities.