Nutrient reduction bioassays in the Waikato River
TR 2018/45
Report: TR 2018/45
Author: Dr Max Gibbs, Glenys Croker (National Institute of Water & Atmospheric Research Ltd (NIWA))
About this report
This report was commissioned by the Technical Leaders Group for the Healthy Rivers Wai Ora Project Report No. HR/TLG/2015-2016/3.5
NIWA conduct a nutrient reduction bioassay on Waikato River water to determine whether reducing either N or P concentrations would cause a reduction in phytoplankton growth.
Read or download the report
Nutrient reduction bioassays in the Waikato River [PDF, 1.7 MB]
| Contents | |
| 1 | Introduction |
| 2 | Methods |
| 2.1 | Experimental design |
| 2.2 | Nutrient depleted water |
| 2.3 | Treatments |
| 2.4 | Biology |
| 3 | Results |
| 3.1 | Zooplankton |
| 3.2 | Phytoplankton |
| 3.3 | Nutrients |
| 3.4 | Bioassay |
| 4 | Summary and Discussion |
| 4.1 | Hypothesis 1 |
| 4.2 | Hypothesis 2 |
| 4.3 | Hypothesis 3 |
| 5 | Conclusions |
| 6 | Recommendations for future bioassays |
| 7 | Acknowledgements |
| 8 | References |