Wildfire impacts on phytoplankton communities of three small lakes on the Boreal Plain, Alberta, Canada: a paleolimnological study
| Autor: | T Charette, E E Prepas |
|---|---|
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences. 60:584-593 |
| ISSN: | 1205-7533 0706-652X |
| DOI: | 10.1139/f03-049 |
| Popis: | Quantification of sedimentary pigments with high performance liquid chromatography enabled the examination of changes in phytoplankton community indicators after wildfire in three lakes on the Boreal Plain with 50-year sediment chronologies. The response of phytoplankton indicators to wildfire was strongest in the shallow Lake B19, with post-fire increased concentrations of β-carotene (all phytoplankton), cyanobacterial pigments (echinenone, canthaxanthin), and lutein (chlorophytes) (p < 0.05). In the relatively deep headwater Lake B3, the indicator for all phytoplankton was not different after fire (p = 0.3), but important changes occurred in the phytoplankton community for 4 years after fire. The concentrations of cyanobacterial (echinenone, myxoxanthophyll) and diatoms + chrysophytes (fucoxanthin) indicators were higher and lower (p < 0.05), respectively, after fire. The relatively deep and non-headwater Lake B4 was little impacted by fire. An increase in cyanobacterial biomass after fire is most likely to occur in shallow headwater lakes on the Boreal Plain. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|