The effects of a warm spring on phytoplankton and zooplankton population dynamics in small eutrophic lakes in the Canadian prairies : implications of a changing climate

Simple item page
dc.contributor.authorDupuis, Alainen_US
dc.date.accessioned2012-06-12T20:14:07Z
dc.date.available2012-06-12T20:14:07Z
dc.date.issued2008en_US
dc.degree.disciplineZoologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractClimate projections predict warming trends for the Canadian prairies. This study investigated effects of warmer spring temperatures on phytoplankton-zooplankton populations in small eutrophic lakes. A two-year study of three eutrophic lakes with contrasting spring weather conditions, i.e., 2005 - a 'normal' spring and 2006- a warm spring (+2oC), demonstrated that warmer water temperatures were associated with increased total phytoplankton and relative cyanobacteria biomass and a shift in zooplankton dominance from daphniids to rotifers. Zooplankton hatching experiments and computer simulations tested the hypothesis that a warm spring differently affected daphniid and rotifer emergence from resting eggs. Experimental conditions mimicking an earlier spring (shorter photoperiod) resulted in fewer daphniid but not rotifer hatchlings, and computer simulations indicated that these changes in hatching success could be responsible for shifts from daphniid- to rotifer-dominated systems. Overall, a warm spring negatively affected daphniid populations, indirectly by increasing cyanobacteria prevalence and directly by decreasing hatching success.en_US
dc.format.extent7681917 bytesen_US
dc.identifier(Sirsi) a1881115en_US
dc.identifier.urihttp://hdl.handle.net/1993/8038
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.titleThe effects of a warm spring on phytoplankton and zooplankton population dynamics in small eutrophic lakes in the Canadian prairies : implications of a changing climateen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Dupuis_The_Effects_of_A_Warm.pdf
Size:
7.33 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
FGS - Electronic Theses and Practica
Manitoba Heritage Theses