ISSN:
1574-6968
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Abstract As part of an extensive ecosystem study, the fate of the bacterioplankton community was followed in the tidal Oosterschelde basin and in the stagnant but saline Lake Grevelingen, The Netherlands. At regular intervals, bacterioplankton biomass, percentages of bacteria attached to particles, bacterioplankton productivity and oxygen consumption rates, together with a number of environmental parameters, were determined. With respect to biomass, productivity and oxygen consumption rates, no significant differences were observed between the two coastal basins. However, the mean percentages of attached bacteria were high in the tidal Oosterschelde basin compared to the stagnant Lake Grevelingen. This could be explained by the observed difference in amounts of colonizable particles. On an annual basis, however, the percentages of attached bacteria were not significantly correlated with the amounts of suspended particles at the sampling stations. A significant, but negative correlation was found between the percentages of attached bacteria and the bacterioplankton productivities at the sampling stations. A probable mechanism for such a negative correlation is discussed.By size fractionation experiments, bacterioplankton contribution to overall oxygen consumption rates was determined. These contributions amounted to 58% and 94% in spring and winter, respectively. From specific bacterioplankton dissimilation and assimilation rates, mean bacterioplankton carbon conversion coefficients of 26% and 6% were calculated in spring and winter, respectively. These percentages are discussed in the light of probable seasonal differences in the supply of substrates for the bacterioplankton community.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1574-6968.1986.tb01956.x
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