Burke, T.A. (1977). The Limnetic zooplankton community of Boulder Basin, Lake Mead in relation to the metalimnetic oxygen minimum. M.Sc. Thesis, University of Nevada, Las Vegas, Nevada, USA. 95 pp.

510739

Burke, T.A.

1977

95 pp.

Publication

https://digitalscholarship.unlv.edu/water_pubs/101

Available for editors   [request]

The limnetic y.ooplankton community of Boulder Basin, Lake Mead, was examined to determina the role of this community in the developior-.nt of a metalimnetic oxygen minimum which regularly occurs in the lake. Analysis of the community from May 1975 to April 1976 revealed that zocplankto1-! maintain high populations within the meta limn ion during summer stratification. The species composition of the community changes noticeably duVing the summer, but due to advanced stages excysting from resting forms, a complete assemblage of individuals are found throughout the 74 day period studied. Thermal 'stratificatv:>-: was weakj covering a 30 meter metalimnion. Eddy currents powerec! by wind action brought oxygen into this zone from the surface, and mixing at the metalimnion-hypolimnion due to internal waves and density flows brought oxygen up into this zone. The metolimnicn was sectioned into two 15 meter layers. The zooplankton consumed 33 to 69 percent of the daily oxygen lost from the upper section and 12 to 42 percent from the lower section of the metalimnion from June 17 to August 28, 1975. The metaliffinetic oxygen depletion of Boulder Basin is due to the oxygen consumption of the complete aquatic community of producers, consumers, and reducers. The zooplanktcn, representing the major consumers, account for a significant portion of the oxygen depletion.

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