New Zealand Journal of Marine and Freshwater Research abstracts
ELEMENTS IN AQUATIC MACROPHYTES, WATER, PLANKTON, AND SEDIMENTS SURVEYED IN
THREE NORTH ISLAND LAKES
D. J. Rawlence*
Freshwater Section, Ecology Division, DSIR, P.O. Box 415, Taupo,
New Zealand
J. S. Whitton
Soil Bureau, DSIR, Private Bag, Lower Hutt, New Zealand
Abstract The average level of phosphorus (2900/jg.g^), magnesium (5800 ^g.g
1), sodium (5800 jttg.g
-1) , chlorine_ (13000/jg.g
J), iron (710
/ig.g-'), vanadium (9.2/tg.g"
1), chromium (5/ig.g
1). manganese (5800 /ig.g"
1) and boron (33 /ig.g"
1) was highest in macrophytes from Lake Rotoaira. The level of some other elements was also highest in water from Lake Rotoaira: potassium (3 mg.litre"
1); calcium (10 mg.litre"
1); magnesium (5.6 mg.litre"') sulphur (6.5 mg.litre"
1) and silicon (31 mg.litre"
1). Lake Rotoaira apparently has a higher nutrient status than Lakes Taupo and Aratiatia, but the maxima also reflect some of the differences in catchment geology between the three lakes.
N.Z. Journal of Marine and Freshwater Research 11 (1) : 73-93. March 1977
Received 23 June 1975; revision received 16 July 1976.
PDF file of entire paper: medium quality (1422K); (scanned from paper original: notes about this process)
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