Interrelationship Between Nutrients And Chlorophylla In An Urban Stormwater Lake During The Icecovered Period 3rd Edition Kejian Chu by Kejian Chu, Yuntong She, Jeff Kemp, Mark Loewen, Evan Davies instant download after payment.

Urban stormwater lakes in cold regions are ice-covered for substantial parts of the
winter. It has long been considered that the ice-covered period is the “dormant
season,” during which ecological processes are inactive. However, little is known
about this period due to the historical focus on the open-water season. Recent
pioneering research on ice-covered natural lakes has suggested that some critical
ecological processes play out on the ice. The objective of this study was to investigate
the active processes in ice-covered stormwater lakes. Data collected during a twoyear field measurement program at a stormwater lake located in Edmonton, Alberta,
Canada were analyzed. The lake was covered by ice from November to mid-April of
the following year. The mean value of chlorophyll-a during the ice-covered period
was 22.09% of the mean value for the open-water season, suggesting that primary
productivity under ice can be important. Nitrogen and phosphorus were remarkably
higher during the ice-covered period, while dissolved organic carbon showed little
seasonal variation. Under ice-covered conditions, the total phosphorus was the major
nutrient controlling the ratio of total nitrogen to total phosphorus, and a significant
positive correlation existed between total phosphorus and chlorophyll-a when the
ratio was smaller than 10. The results provide preliminary evidence of the critical
nutrient processes in the Stormwater Lake during the ice-covered period.
JOURNAL OF CONTEMPORARY URBAN AFFAIRS (2017) 1(3), 24-30.
https://doi.org/10.25034/ijcua.2018.3675
www.ijcua.com
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