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New Zealand Journal of Marine and Freshwater Research abstractsHETEROTROPHIC BACTERIA AND THEIR RELATIONSHIP WITH PLANKTON IN A NEW ZEALAND FRESHWATER LAKEAngela J. Ramsay*Department of Botany, University of Canterbury, Christchurch 1, New ZealandAbstract The viable heterotrophic bacteria of Lake Grasmere in inland Canterbury (43° 05'S, 171° 45'E) were studied. Numbers of bacteria in water above a spring were positively correlated with rainfall in the 7 days before sampling, but bacteria in open water and from over the macrophyte Elodea canadensis were not. There was some increase in the bacterial population in the water over E. canadensis in the autumn to winter months. Numbers of bacteria in the open water ranged from 55 to 1020 cells per millilitre, and were outnumbered by algae by a factor of between 4 and 34. The bacterial population tended to increase after blooms of zooplankton, but there was little or no response to changes in phyto-plankton populations. Benthic bacteria rarely increased in numbers after the deposition of organic matter.
N.Z. Journal of Marine and Freshwater Research 10 (1) : 77-90. March 1976 Received 1 July 1975. PDF file of entire paper: medium quality (892K); (scanned from paper original: notes about this process) This year's abstracts | Journal home page | All abstracts | Publishing home page |