Blade Motion and Nutrient Flux to the Kelp, Eisenia arborea
Blade Motion and Nutrient Flux to the Kelp, Eisenia arborea
复制标题
叶片运动和海带、树形爱胜蚓的营养通量
DOI：
10.2307/1543453
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Loretta M. Roberson
中科院分区：
文献类型：
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作者：
Mark Denny;Loretta M. Roberson
海藻依靠水流和波浪来补充光合作用所需的营养。藻类叶片与水流的相互作用通常涉及叶片表面的动态重新定向（俯仰和扑动），这可能反过来影响营养通量。作为理解叶片运动后果的第一步，我们探索了振荡俯角对平面通量的影响以及对海带爱森尼亚的两种形态的影响。在慢水流中（相当于2.7 cm s−1的水流速度），俯仰增加了两种海带形态的时间平均通量，但没有增加到板块。在快速流动中（相当于水中20 cm s - 1），无论形状如何，俯仰对通量的影响都可以忽略不计。对于通量的许多方面，平板是水流保护藻叶片的可靠模型，但从平板上做出的预测将大大低估流向水流暴露叶片的通量。这些测量强调了与流动相关的养分运输的复杂性，以及更好地理解养分通量、叶片运动、叶片形态和水流之间的动态相互作用的必要性。
Marine algae rely on currents and waves to replenish the nutrients required for photosynthesis. The interaction of algal blades with flow often involves dynamic reorientations of the blade surface (pitching and flapping) that may in turn affect nutrient flux. As a first step toward understanding the consequences of blade motion, we explore the effect of oscillatory pitching on the flux to a flat plate and to two morphologies of the kelp Eisenia arborea. In slow flow (equivalent to a water velocity of 2.7 cm s−1), pitching increases the time-averaged flux to both kelp morphologies, but not to the plate. In fast flow (equivalent to 20 cm s−1 in water), pitching has negligible effect on flux regardless of shape. For many aspects of flux, the flat plate is a reliable model for the flow-protected algal blade, but predictions made from the plate would substantially underestimate the flux to the flow-exposed blade. These measurements highlight the complexities of flow-related nutrient transport and the need to understand better the dynamic interactions among nutrient flux, blade motion, blade morphology, and water flow.