A geometrical approach explains Lake Ball (Marimo) formations in the green alga, Aegagropila linnaei.
A geometrical approach explains Lake Ball (Marimo) formations in the green alga, Aegagropila linnaei.
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DOI：
10.1038/srep03761
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发表时间：
2014-01-20
影响因子：
4.6
通讯作者：
Yoshimura J
中科院分区：
文献类型：
--
作者：
Togashi T;Sasaki H;Yoshimura J
一种极其罕见的昆虫，Aegagropila linnaei，以其美丽的球形丝状聚集体而闻名，称为Lake Ball（Marimo）。长期以来，生物学中一直存在一个谜，即为什么这种物种会形成3D球状聚集体。这也形成了二维垫状聚集体。在这里，我们表明，形成球状聚集体是一种适应性策略，以增加生物量在极其有限的环境中适合这种植物的生长。我们估计球殖民地达到的最大生物量，并将其与垫殖民地达到的生物量进行比较。结果，球形菌落的面积生物量可以比垫状菌落大。在迄今为止研究的两个大型球形菌落中，它们实际上比垫状菌落具有更大的生物量。湖球在自然界中的独特性似乎是由于这种环境条件的稀有性。这意味着，保护这种植物是困难的，但很重要。
An extremely rare alga, Aegagropila linnaei, is known for its beautiful spherical filamentous aggregations called Lake Ball (Marimo). It has long been a mystery in biology as to why this species forms 3D ball-like aggregations. This alga also forms two-dimensional mat-like aggregations. Here we show that forming ball-like aggregations is an adaptive strategy to increase biomass in the extremely limited environments suitable for growth of this alga. We estimate the maximum biomass attained by ball colonies and compare it to that attained by mat colonies. As a result, a ball colony can become larger in areal biomass than the mat colony. In the two large ball colonies studied so far, they actually have larger biomasses than the mat colonies. The uniqueness of Lake Balls in nature seems to be due to the rarity of such environmental conditions. This implies that the conservation of this alga is difficult, but important.
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