Abstract
Abstract Between December 1975 and March 1976 base‐line data were obtained from 21 Ndrth Canterbury high country lakes located in three major river catchments to establish trieir relative trophic status. Included were two lakes (Coleridge and Sumner) on the New Zealand Officials Committee on Eutrophication base‐line study list, and two lakes (Marlon and Vagabond's Inn) in the IBP Project Aqua series. The following biological parameters were measured: heterotrophic potential (Vmax), total bacterial counts, total and microbial adenosine triphophate (ATP), chlorophyll a and pH. Chemical analyses included dissolved oxygen; alkalinity; free and total CO2; nitrogen and phosphorus compounds; chloride; calcium; and magnesium. On the basis of Vmas, the lakes were separated into mesotrophic and oligotrophic groupings, in the following decreasing order of relative trophic status: mesotrophic—Lakes Little Maspn, Marymere, Vagabond's Inn, Evelyn and Ida (mean Vmas 0.071 μg.l−1.h−1 ); Lakes Maribn, Letitia, Sarah, Gras...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: New Zealand Journal of Marine and Freshwater Research
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
