NDLI: On the environmental role of urban lakes in Mexico City

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On the environmental role of urban lakes in Mexico City

Content Provider	Springer Nature Link
Author	Martínez Arroyo, Amparo Jáuregui, Ernesto
Copyright Year	2000
Abstract	Biometeorological relationships in two urban lakes in Mexico City were studied during two years. Meteorological parameters were analyzed together with physical, chemical, and biological variables in the lakes' water column in order to obtain general descriptors of water–air interactions in the urban environment. Low percentages of light penetration (<10–20%) were recorded in both lakes at 0.5 m depth, as well as high chlorophyll a concentrations ranging from 89 to 220 mg m$^{−3}$. Dissolved oxygen concentrations often reached oversaturation in the surface layer. The potential water–air oxygen exchange ranged from 11 to 45 mmol O$_{2}$ m$^{−2}$ d$^{−1}$ in Chapultepec and from 11 to 124 mmol O$_{2}$ m$^{−2}$ d$^{−1}$ in Xochimilco, while the oxygen budget from net photosynthetic production would be on the order of 1.2 to 9.3 μm O$_{2}$ mg Chl a $^{−1}$ h$^{−1}$ in the former lake and from 0.77 to 16.9 μm O$_{2}$ mg Chl a $^{−1}$ h$^{−1}$ in the latter. Xochimilco loses an annual average of 8855 m$^{3}$ d$^{−1}$ to evaporation, while Chapultepec loses an annual average of the order of 240 m$^{3}$ d$^{−1}$. Physical and biological processes in urban lakes act together to increase the environmental humidity, decrease temperature, and contribute to O$_{2}$–CO$_{2}$ exchange with the environment. Understanding the detailed transfer processes between aquatic ecosystems and their adjacent atmosphere will help the urban planning with environmental design regarding microclimate targets and healthy environments.
Starting Page	145
Ending Page	166
Page Count	22
File Format	PDF
ISSN	10838155
Journal	Urban Ecosystems
Volume Number	4
Issue Number	2
e-ISSN	15731642
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Environmental Management Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Ecology Urban Studies

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