Coastal Restoration Trust of New Zealand

Coastal Dune Ecosystem Reference Database

Northland Lakes Strategy Part II: update and implementation strategy

Author
Champion PD
Year
2014
Journal / Source
NIWA Clint Report No. HAM2014-038
Publisher / Organisation
Prepared for Northland Regional Council
Pages
35 pp
Keywords
dune lakes
Summary
Since the 2012 report, 12 lakes have been approved as ‘Outstanding waterbodies’ by the Northland Regional Council. Suggested changes to the Northland Lake Strategy 2012 include:  changes to classification of lakes, with some lakes previously classed as Type 3 ‘window lakes’ now considered to be either Type 1 ‘perched lakes’ (e.g., Lake Ngatu) or Class 4 ‘dune contact lakes’ (e.g., Lake Te Kahika)  incorporate re-evaluation of the threat status of endangered species into Lake Ecological Value score  use trophic level index (TLI) and five year trends in this metric as a measure of eutrophication as opposed to chlorophyll a measures (chlorophyll a is included in TLI calculation). All relevant parameters required to calculate TLI are currently sampled by NRC.