New Zealand Journal of Marine and Freshwater Research abstracts
Influences of stream size and catchment land-use on fine particulate organic
matter retention in streams
NIALL BROEKHUIZEN
JOHN M. QUINN
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 11 115
Hamilton, New Zealand
Abstract Using corn pollen as an analogue for fine
particulate organic matter (FPOM), retention characteristics were measured for
13 reaches encompassing three different catchment land-use classes (pasture,
native forest, and exotic pine forest), and five pasture sites along the
Mangaotama Stream, New Zealand. The retention coefficients (specific loss rate,
m
-1) of reaches having similar positions in the stream continuum did
not differ significantly between land-use types. The retention coefficient was
strongly related to several correlates of position in the stream
continuum--notably the logarithm of discharge. We were unable to identify the
mechanisms responsible for removing corn pollen from suspension, but loss rates
were consistently lower than those predicted from the still-water sinking
speeds of the corn pollen.
Keywords FPOM; retention; stream continuum; land use; corn
pollen; Whatawhata; New Zealand
M98024
Received 13 May 1998; accepted 19 August 1998
PDF file of entire paper: medium quality (829K); (scanned from paper original: notes about this process)
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