DEPTH-DEPENDENT PHOTOADAPTATION BY ZOOXANTHELLAE OF THE REEF CORAL MONTASTREA-ANNULARIS
DEPTH-DEPENDENT PHOTOADAPTATION BY ZOOXANTHELLAE OF THE REEF CORAL MONTASTREA-ANNULARIS
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DOI：
10.1007/bf00409592
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发表时间：
1982-01-01
期刊：
影响因子：
2.4
通讯作者：
DUSTAN, P
中科院分区：
文献类型：
--
作者：
DUSTAN, P
生活在加勒比海珊瑚群中的虫黄藻。annularis photoadapt to depth dependent attenuation of submarine light.在牙买加愉景湾进行的研究表明，在浅水珊瑚群落中，虫黄藻似乎适应于强光，如果移植到低光强度，虫黄藻的功能就会很差，而在深水珊瑚群落中，虫黄藻可能会被强光破坏。对降低的光强度和改变光谱质量的适应似乎是通过增加光合单位（PSU）的大小来实现的，而不是增加每个细胞的PSU数量。全细胞吸收随深度增加，部分抵消了由于深度依赖性衰减而导致的光能损失。光合作用可用辐射的计算表明，不同深度的藻类正在优化而不是最大限度地提高它们收集海底光能的能力。
Zooxanthellae living in colonies of the Caribbean reef coral M. annularis photoadapt to depth-dependent attenuation of submarine light. Studies carried out at Discovery Bay, Jamaica, show that in shallow-living coral colonies, the zooxanthellae appear photoadapted to function at high light intensities, and do poorly if transplanted to low light intensities zooxanthellae in deeper-living coral colonies can be damaged by high light intensities. The adaptation to decreasing light intensity and changing spectral quality appears to be accomplished by increasing the size of the photosynthetic unit (PSU), as opposed to increasing the number of PSU per cell. Whole cell absorption increases with depth, partially offsetting the loss of light energy due to depth-dependent attenuation. Calculations of photosynthetically usable radiation, the light an alga is capable of absorbing in its own submarine habitat, suggest that the algae at different depths are optimizing rather than maximizing their ability to harvest submarine light energy.