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Macrophytes play a key role in many unshaded lotic ecosystems, but little is known of the factors controlling their presence, abundance, and composition. Macrophyte abundance, diversity, and composition were studied in 15 New Zealand streams to test the hypotheses that the presence and development of macrophytes in lotic systems is primarily controlled by(More)
Studies documenting phenotypic variation among populations show that ecological performance in one activity is sometimes traded off against another. Identifying environment-specific costs and benefits associated with performance trade-offs is fundamental to knowing how conflicting selection pressures shape phenotype-environment matching in populations. We(More)
The River Environment Classification system (REC) was produced for the Ministry for the Environment by the National Institute of Water and Atmospheric Research (NIWA). It is distributed under license by NIWA. Unauthorised uses or distribution of the data to third parties is strictly prohibited. Organisations wanting to use REC for commercial purposes should(More)
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