SPATIAL-DISTRIBUTION OF VIRUSES, BACTERIA AND CHLOROPHYLL-A IN NERITIC, OCEANIC AND ESTUARINE ENVIRONMENTS

被引:187
作者
COCHLAN, WP [1 ]
WIKNER, J [1 ]
STEWARD, GF [1 ]
SMITH, DC [1 ]
AZAM, F [1 ]
机构
[1] UNIV CALIF SAN DIEGO, SCRIPPS INST OCEANOG, DIV MARINE BIOL RES, LA JOLLA, CA 92093 USA
关键词
D O I
10.3354/meps092077
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The spatial distribution of viruses was investigated in the coastal and oceanic waters of the Southern California Bight, USA, and the brackish waters of the Gulf of Bothnia, Sweden, using the direct harvesting technique and transmission electron microscopy. The vertical and horizontal distributions of viruses were examined in relation to bacterial abundance and chlorophyll a. Total virus abundances ranged from 0.3 to 52 X 10(9) l-1; higher concentrations of viruses were found in the upper 50 m of the water column and in coastal environments. Viruses with capsid diameters less than 60 nm dominated the virus community, were morphologically characterized as bacteriophages and were responsible for most of the observed spatial variability. Bacteria abundance alone explained 67 % of the spatial variability in virus numbers, thereby suggesting that bacteria constituted the major host organisms for viruses in these physically diverse habitats.
引用
收藏
页码:77 / 87
页数:11
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