MICROALGAL PHOTOSYNTHESIS AND SPECTRAL SCALAR IRRADIANCE IN COASTAL MARINE-SEDIMENTS OF LIMFJORDEN, DENMARK

被引:77
作者
LASSEN, C
PLOUG, H
JORGENSEN, BB
机构
[1] Institute of Biological Sciences, Department of Microbial Ecology, University of Aarhus, Aarhus, DK-8000, Ny Munkegade
关键词
D O I
10.4319/lo.1992.37.4.0760
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Scalar irradiance and oxygenic photosynthesis were measured simultaneously at 100-mum spatial resolution by a fiber-optic scalar irradiance microsensor and an oxygen microelectrode spaced 120 mum apart. Marine microbial mats on sandy sediments along the coast of Limfjorden, Denmark, were dominated by cyanobacteria with a surface layer populated by pennate diatoms. In dim light Oscillatoria sp. migrated upward and a dense surface film of cyanobacteria developed. The spectral distribution of scalar irradiance showed absorption peaks at 430 and 675 nm (Chl a), 630 (phycocyanin), and 800 and 860 nm (bacteriochlorophyll a). Infrared scalar irradiance reached 200% of incident light intensity at 0.0-0.3-mm depth and IR penetration was independent of the development of a cyanobacterial surface film. At high incident light intensity, 740 muEinst m-2 s-1, the photosynthetic efficiency at 1.0-mm depth was 10-fold higher than in the uppermost 0.0-0.6 mm of the sediment. The lower boundary of the euphotic zone (detectable gross photosynthesis) was at a mean light level of greater-than-or-equal-to 7.5 muEinst m-2 s-1.
引用
收藏
页码:760 / 772
页数:13
相关论文
共 33 条
[1]   INFLUENCE OF ORGANIC-COMPOUNDS AND LIGHT LIMITATION ON THE GROWTH-RATE OF ESTUARINE BENTHIC DIATOMS [J].
ADMIRAAL, W ;
PELETIER, H .
BRITISH PHYCOLOGICAL JOURNAL, 1979, 14 (03) :197-206
[2]  
[Anonymous], 2011, LIGHT PHOTOSYNTHESIS
[3]   DESIGN AND EVALUATION OF A MEASUREMENT SYSTEM FOR PHOTOSYNTHETICALLY ACTIVE QUANTUM SCALAR IRRADIANCE [J].
BOOTH, CR .
LIMNOLOGY AND OCEANOGRAPHY, 1976, 21 (02) :326-336
[4]   INFLUENCE OF LIGHT AND TEMPERATURE ON PHOTOSYNTHETIC RATE OF MARINE BENTHIC DIATOMS [J].
COLIJN, F ;
VANBUURT, G .
MARINE BIOLOGY, 1975, 31 (03) :209-214
[5]   VERTICAL DISTRIBUTION OF PHOTOSYNTHETIC PIGMENTS AND PENETRATION OF LIGHT IN MARINE SEDIMENTS [J].
FENCHEL, T ;
STRAARUP, BJ .
OIKOS, 1971, 22 (02) :172-&
[6]   MONTE-CARLO MODELING OF LIGHT-PROPAGATION IN HIGHLY SCATTERING TISSUES .1. MODEL PREDICTIONS AND COMPARISON WITH DIFFUSION-THEORY [J].
FLOCK, ST ;
PATTERSON, MS ;
WILSON, BC ;
WYMAN, DR .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1989, 36 (12) :1162-1168
[7]  
HAARDT H, 1980, OCEANOL ACTA, V3, P333
[9]  
JORGENSEN BB, 1986, LIMNOL OCEANOGR, V31, P1376
[10]   PHOTOSYNTHESIS AND STRUCTURE OF BENTHIC MICROBIAL MATS - MICROELECTRODE AND SEM STUDIES OF 4 CYANOBACTERIAL COMMUNITIES [J].
JORGENSEN, BB ;
REVSBECH, NP ;
COHEN, Y .
LIMNOLOGY AND OCEANOGRAPHY, 1983, 28 (06) :1075-1093