Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Robert O. Megard"'
Publikováno v:
SIL Proceedings, 1922-2010. 30:801-808
Publikováno v:
Journal of Phycology. 23:608-613
Nitrite uptake and oxygenic photosynthesis by cultures of Chlamydomonas sp. isolated from Lake Superior were measured at different irradiances in order to compare predictive models of nitrite uptake and to assess the proportion of photoreductant (mea
Autor:
Leif K. Hembre, Robert O. Megard
Publikováno v:
Journal of Plankton Research. 28:1129-1141
Communicating editor: K.J. Flynn The effects of fish predation on zooplankton communities are well documented, but relatively little is known about how predation structures the genetic composition of individual populations. This study illustrates how
Autor:
Robert O. Megard, Leif K. Hembre
Publikováno v:
Freshwater Biology. 50:1064-1080
Summary 1. Stocking of lakes with rainbow trout is a common practice that presents a potential conflict for lake managers who must balance the interests of anglers with those concerned that zooplanktivory by trout may trigger a trophic cascade and re
Publikováno v:
Ecological Indicators. 4:245-253
Reliable ecological indicators of wetland integrity are necessary for assessing recovery of restored wetlands; yet, little consensus currently exists on which indicators are most appropriate. We employed indicators derived from simple, standard measu
Autor:
Robert O. Megard, Leif K. Hembre
Publikováno v:
Limnology and Oceanography. 48:2221-2233
Detailed information about the location and extent of zooplankton patches is fundamental to understand how abiotic and biotic forces interact to structure the spatial distribution of zooplankton. We mapped zooplankton patchiness in a Minnesota lake d
Publikováno v:
Limnology and Oceanography. 42:827-840
Zooplankton distributions during coastal upwelling in western Lake Superior were mapped with a high-frequency (192~kHz) sonar system that consists of an echosounder and a navigation receiver connected to a microcomputer. An acoustic transect after a
Publikováno v:
Heredity. 77:292-302
The frequencies of single locus genotypes (clones) in a natural population of Daphnia pulicaria in a Minnesota lake were estimated during five months when the lake was thermally stratified in 1991. Further samples were collected in early August 1990