Dynamics of epiphytic communities on Equisetum fluviatile L.
Dynamics of epiphytic communities on Equisetum fluviatile L.
复制标题
河问贼附生群落动态。
DOI：
10.1007/978-94-009-7293-3_21
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
T. Kairesalo
中科院分区：
文献类型：
--
作者：
T. Kairesalo
附生植物群落对环境条件短期变化的响应在木贼林分的外带进行了为期18天的测量。经过一段时间的晴朗和平静后，附生植物的生物量最大，但在阴天一周后，附生物质的三分之二消失了。附生物质首先沿着大型植物的枝条相当均匀地分布到50-60厘米的深度，但风向的微小变化似乎就会使硅藻在水面附近分离。当光照条件恶化时，藻类的优势地位发生了变化；羊草草藻被丝状绿藻所取代，丝状绿藻与底物附着得更紧密。藻类群落组成和生物量的这种变化也反映在它们对大型植物区初级生产总量的贡献上。附生群落中的食草动物(寡毛类+摇蚊幼虫)的总数保持不变。这项研究的结果也揭示了采样间隔在测量平板上的附生生物积累时的重要性。
The response of epiphytic communities to short-term variations in environmental conditions was measured at the outer zone of an Equisetum fluviatile stand for an 18-day period. The epiphytic biomass was maximal after a period of bright and calm weather, but then during a week of cloudy weather two thirds of the epiphytic material disappeared. The epiphytic material was first quite evenly distributed along the macrophyte shoots to a depth of 50-60 cm, but a small change in the wind direction seemed to detach the diatom, Fragilaria capucina Desm., near the water surface. When light conditions worsened the algal dominance changed; Fragilaria capucina was replaced by filamentous green algae, Oedogonium spp., which were more tightly attached to their substrate. This change in the algal community composition and biomass was also reflected in their contribution to the total primary production of the macrophyte zone. The total number of herbivores (oligochaetes+ chironomid larvae) in the epiphytic communities remained quite constant. The results of this study also reveal the importance of sampling intervals when measuring periphyton accumulation on plates.