SEAWEEDS - THEIR PRODUCTIVITY AND STRATEGY FOR GROWTH
SEAWEEDS - THEIR PRODUCTIVITY AND STRATEGY FOR GROWTH
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DOI：
10.1126/science.182.4116.975
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发表时间：
1973-01-01
期刊：
影响因子：
56.9
通讯作者：
MANN, KH
中科院分区：
文献类型：
--
作者：
MANN, KH
海洋边缘是温带地区植物生长的最佳生境之一。在有利的环境下，净初级生产力可能与地球上任何地方一样高--例如，与热带雨林相比。海藻，成功地殖民了这个区域，是一种独特的生命形式。它们附着在坚硬的基质上，而不是通过根系。而是一个固定器它们不再依赖于土壤中局部的养分供应，而是从周围的水中汲取养分。因为这些水在潮汐和风的作用下保持着永恒的运动，营养供应几乎是取之不尽的。即使海藻和浮游生物耗尽了表面沃茨中的营养物质，风引起的或河口的冲刷通过引起较深水域的上涌来更新供应。- 海藻在低潮水平面以下的生长。在亚海岸远比在潮间带丰富。在水下航行器和潜水器出现之前。潮间带的藻类是人们关注的焦点，并提供了与环境因子梯度（如暴露于空气或波浪的程度）有关的物种分带的极好例子（I）。虽然潮间带主要是由岩藻，或rnckweeds居住，
rhe edge of the sea is one of the best habitats for plant growth in temperate latitudes. In favorable circumstances, net primary productivity may be as high as anywhere else on earth-~ onlparable, for example, to a tropical rain forest. Seaweeds, which have successfully colonized this zone, are a unique form of life. They are attached to a hard substrate, not by a root systenl. but by a holdfast. Instead of relying on a rather localized supply of nutrients in the soil, they take their nutrients fronl the water that surrounds them. Because this water is kept in perpetual motion by tides and winds, the nutrient supply is virtually inexhaustible. Even if the seaweeds and plankton deplete the nutrients in" Iurface waters, wind-induced or estuafine nlJxing renews the supply by causing upwelling of deeper water.'-fhe growth of seaweeds below lowtide level. in the sublittoral. is far richer than in the intertidal areas. Before the advent of underwater vehicle~ and scuha gear. the algae of the intertidal zone were the focus of attention~ lnd provided elegant exanlples of species zonation in relation to gradients of environmental factors, such as degree of exposure to air or anl0unt of wave~ tction (I). While the intertidal zone is inhabited primarily by the fucoids, or rnckweeds, the sublittoral is dominated