Articles | Volume 20, issue 6
https://doi.org/10.5194/hess-20-2395-2016
https://doi.org/10.5194/hess-20-2395-2016
Comment/reply
 | 
20 Jun 2016
Comment/reply |  | 20 Jun 2016

Comment on "Using groundwater age and hydrochemistry to understand sources and dynamics of nutrient contamination through the catchment into Lake Rotorua, New Zealand" by Morgenstern et al. (2015)

Jonathan M. Abell, David P. Hamilton, and Christopher G. McBride

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Cited articles

Abell, J. M., Özkundakci, D., and Hamilton, D. P.: Nitrogen and phosphorus limitation of phytoplankton growth in New Zealand lakes: Implications for eutrophication control, Ecosystems, 13, 966–977, 2010.
Abell, J., Stephens, T., Hamilton, D., McBride, C., and Scarsbrook, M.: Analysis of Lake Rotorua Water Quality Trends: 2001–2012. Environmental Research Institute Report 10. Client report prepared for Environment Court mediation on the Bay of Plenty Regional Policy Statement. Environmental Research Institute, The University of Waikato, Hamilton, New Zealand, available at: http://www.rotorualakes.co.nz/vdb/document/503 (last access: 19 March 2016), 2012a.
Abell, J. M., Hamilton, D. P., and Paterson, J.: Reducing the external environmental costs of pastoral farming in New Zealand: Experiences from the Te Arawa lakes, Rotorua, Aust. J. Environ. Manage., 18, 139–154, 2012b.
Abell, J. M., Hamilton, D. P., and Rutherford, J. C.: Quantifying temporal and spatial variations in sediment, nitrogen and phosphorus transport in stream inflows to a large eutrophic lake, Environ. Sci. Process. Imp., 15, 1137–1152, 2013.
Abell, J. M., McBride, C. M., and Hamilton, D. P.: Lake Rotorua Wastewater Discharge Environmental Effects Study. ERI Report No. 60. Client report prepared for Rotorua Lakes Council. Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, Hamilton, New Zealand, available at: http://www.waikato.ac.nz/eri/research/publications (last access: 10 June 2016.), 2015.
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We comment on "Using groundwater age and hydrochemistry to understand sources and dynamics of nutrient contamination through the catchment into Lake Rotorua, New Zealand" by Morgenstern et al. (2015). They propose that "the only effective way to limit algae blooms and improve lake water quality in such environments is by limiting the nitrate load". We outline four reasons why it is important to instead limit both phosphorus and nitrogen loads to this iconic lake, consistent with current policy.