Preface V

BELL, R.T., STENSDOTTER, U., PETTERSSON, K., ISTVANOVICS, V. &
PIERSON, D.C.: Microbial dynamics and phosphorus turnover in Lake
Erken (with 8 figures and 3 tables) 1-20

FORSELL, L.: Migration from the littoral zone as an inoculum for
phytoplankton (with 3 figures and 1 table) 21-27

HYENSTRAND, P., NYALL, P., PETTERSSON, A. & BLOMQVIST, P.: Regulation
of non-nitrogen-fixing cyanobacteria by inorganic nitrogen sources -
experiments from Lake Erken (with 5 figures and 1 table) 29-40

HYENSTRAND, P., BLOMQVIST, P. & PETTERSSON, A.: Factors determining
cyanobacterial success in aquatic systems - a literature review (with
2 figures) 41- 62

ISAKSSON, A.: Phagotrophic phytoflagellates in lakes - a literature
review (with 3 figures and 3 tables) 63-90

ISTVANOVICS, V. & PETTERSSON, K.: Phosphorus release in relation to
composition and isotopic exchangeability of sediment phosphorus (with
2 figures and 5 tables) 91-104

KAHLERT, M.: C:N:P ratios of freshwater benthic algae (with 4 tables)
105-114

KISAND, V. & PETTERSON, K.: Induction of bacterial and algal
exoenzymes during summer in Lake Erken (with 5 figures) 115-121

RENGEFORS, K.: Seasonal succession of dinoflagellates coupled to the
benthic cyst dynamics in Lake Erken (with 6 figures) 123-141

RODRIGO, M.A., PIERSON, D.C., PETTERSSON, K., KAUP, E. & PADISAK, J.:
Sinking and floating rates of natural phytoplankton assemblages in
Lake Erken (with 5 figures and 3 tables) 143-156

RYDIN, E. & BRUNBERG, A.-K.: Seasonal dynamics of phosphorus in Lake
Erken surface sediments (with 5 figures) 157-167

SCHREIBER, S., ODELSTRÖM, T., PETTERSSON, K. & ETCHELBERG, D.: The
zebra mussel Dreissena polymorpha as a food source for the signal
crayfish Pacifastacus leniusculus in Lake Erken - laboratory
experiments (with 7 figures and 2 tables) 169-176

TÖRNBLOM, E. & PETTERSSON, K.: Bacterial production and total sediment
metabolism in profundal Lake Erken sediments (with 1 figure and 1
table) 177-183

WEYHENMEYER, G.A.: Resuspension in lakes and its ecological impact - a
review (with 2 figures and 3 tables) 185-200

WEYHENMEYER, G.A., PETTERSSON, K. & PADISAK, J.: Quantitative
relationships between planktonic biomass and organic/inorganic
resuspended particulate matter (with 6 figures and 2 tables) 201-212

VREDE, K., HYENSTRAND, P., PETTERSSON, A. & BLOMQVIST, P.: The
response of heterotrophic bacterioplankton to different forms of
inorganic nitrogen (with 3 figures and 3 tables) 213-222