New Zealand Journal of Marine and Freshwater Research abstracts
Distribution of macrophytes in New Zealand streams and lakes in relation
to disturbance frequency and resource supply--a synthesis and conceptual
model
TENNA RIIS
BARRY J. F. BIGGS
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 8602
Christchurch, New Zealand
email: t.riis@niwa.cri.nz
Abstract A conceptual model for the occurrence of common
macrophyte species in different freshwater habitats in New Zealand is
presented. The model is developed in two steps. First, a classification of
freshwater habitats based on the level of disturbance frequency and resource
supply in the habitats is performed. Second, a classification of common New
Zealand freshwater macrophytes is made based on the appearance of relevant
competitive species traits in different combinations of disturbance frequency
and resource supply. From this we predict in which habitat each species is most
competitive. We discuss how to test and refine the model, especially by gaining
more knowledge about the presence and distribution of the plant species in
relation to disturbance frequency, based on field and experimental studies.
Benefits of a thorough predictive model in relation to the management practices
and maintenance of macrophyte vegetation in lakes and lowland streams are
discussed.
Keywords freshwater macrophytes; disturbance frequency;
resource supply; plant distribution; life-history strategy
M00057
Received 20 July 2000; accepted 16 October 2000
New Zealand Journal of Marine and Freshwater Research, 2001, Vol. 35:
255-267
0028-8330/01/3502-0255 $7.00 (c) The Royal Society of New Zealand
2001
PDF file of entire paper: medium quality (1019K); (scanned from paper original: notes about this process)
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