| dc.contributor.author |
Contant, Jacinthe |
|
| dc.date.accessioned |
2012-01-23T14:42:58Z |
|
| dc.date.available |
2013-03-01T11:00:04Z |
|
| dc.date.created |
2012 |
en_US |
| dc.date.issued |
2012-01-23 |
|
| dc.identifier.uri |
http://hdl.handle.net/10393/20623 |
|
| dc.description.abstract |
The structure of phytoplankton communities was examined seasonally across five rivers with a focus on small cells and their relative importance. Picophytoplankton (0.2-2 μm), previously considered insignificant in rivers, reached densities as high as those observed in lakes and oceans (~ 10e4-10e5 cells/mL). Their relative importance was not a function of trophic state with the highest contribution to algal biomass found in the most eutrophic river. Body size distributions were analyzed from both chlorophyll-a size fractions and taxonomic enumerations; no significant effect of river or season was detected, suggesting that phytoplankton size distribution is not a useful metric of change in rivers. Unlike lake ecosystems, the rivers were uniformly dominated by small cells (< 20 μm). Taxonomic analyses of the seasonal succession did not reveal a common periodicity of particular divisions (e.g. diatoms). However, strong dominance was more typical of eutrophic rivers even though taxa richness was similar. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.subject |
phytoplankton |
en_US |
| dc.subject |
picophytoplankton |
en_US |
| dc.subject |
size distribution analysis |
en_US |
| dc.subject |
seasonal succession |
en_US |
| dc.subject |
nutrients |
en_US |
| dc.subject |
Picophytoplankton in rivers |
en_US |
| dc.title |
Phytoplankton Communities in Temperate Rivers |
en_US |
| dc.faculty.department |
Biologie / Biology |
en_US |
| dc.contributor.supervisor |
Pick, Frances R |
|
| dc.embargo.terms |
1 year |
en_US |
| dc.degree.name |
MSc |
en_US |
| dc.degree.level |
masters |
en_US |
| dc.degree.discipline |
Sciences / Science |
en_US |
