Trophic Potential and Photoecology of Endolithic Algae Living within Coral Skeletons
Trophic Potential and Photoecology of Endolithic Algae Living within Coral Skeletons
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珊瑚骨架内生藻类的营养潜力和光生态学
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
S. Conrady
中科院分区：
文献类型：
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作者：
D. Schlichter;H. Kampmann;S. Conrady
.石内藻类Ostreobium quekettii Phyllosiphoniaceae生活在硬放线菌Mycedium elephantotus和Leptoseris fragilis的骨骼中，生物量平均为300 μg蛋白质。厘米-2。这代表了约7%的蛋白质的zooxanthekie含有组织的M。elephantotus和L.脆弱的氧气产量Pmaxnet为0。Querkettii在M.的裸露骨骼中。在大的骨骼碎片中测定的平均O2为0.7 μ g.cm-2· h-1。这一数量大约是生活在相同的石珊瑚物种中相同深度Pmaxnet 11 μg O2· Cm-2· h-1的虫黄藻Symbiodinium microadriaticum生产力的6%。光补偿O. quekettii -骨骼内-达到约10和饱和在35 - 40 μE·m-2· s-1。M.在88 m深度处，象皮虫骨骼接受的最大辐照度为环境辐照度的4-6%，约为0.9 μE · m-2· s-1，约为表面辐照度的0.04%。在洛在145 m深度处的fragilis，光子通量下降到0.3 μE·m-2· s-1，小于表面强度的0.004%。随深度的增加，石内藻的Chl B与Chl a的比值逐渐增加. fragilis，表明在弱光条件下光捕获的改善。在自由生活的O.在0.5 ~ 60 μE·m-2· s-1的辐照水平下，随着光通量的降低，叶绿素含量增加，而黄酮和β-胡萝卜素含量降低。
. The biomass of the endolithic algae Ostreobium quekettii Phyllosiphoniaceae living within skeletons of the scleractinans Mycedium elephantotus and Leptoseris fragilis averages 300 μg protein. cm-2. This represents approximately 7% of the protein of the zooxanthekie-containing tissue of M. elephantotus and approximately 38% of that of L. fragilis. Oxygen production Pmaxnet of 0. querkettii in bare skeletons of M. elephantotus averaged 0.7 μg O2.cm-2· h-1 measured in large skeletal fragments. This amount is approximately 6% of the productivity of the zooxanthellae Symbiodinium microadriaticum living in the same scleractinian species at the same depth Pmaxnet 11 μg O2· Cm-2· h-1. Light compensation of O. quekettii - within skeletons - was reached at approximately 10 and saturation at 35 40 μE·m-2· s-1. Algae within the M. elephantotus skeletons receive a maximum of 4–6% of the ambient irradiance, which is approximately 0.9 μE · m-2· s-1 approximately 0.04% surface irradiance at a depth of 88 m. In L. fragilis at a depth of 145 m, the photon flux decreases to 0.3 μE·m-2· s-1, which is less than 0.004% of surface intensity. With increasing depth, the ratio of Chl b to Chl a increased in endolithic algae colonizing L. fragilis, indicating improvement of light harvesting under low light conditions. In free-living O. quekettii cultured at irradiance levels from 0.5–60 μE·m-2· s-1, the concentrations of chlorophylls increased and that of siphonein and β-carotene decreased with decreasing photon flux.