Short-term effects of wildfire on Patagonian headwater streams
| Autor: | Emilio A. Williams Subiza, Cecilia Brand |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Biomass (ecology) Ecology FUNCTIONAL FEEDING GROUPS 010604 marine biology & hydrobiology Forestry STREAMS Ecología Total dissolved solids FIRE 010603 evolutionary biology 01 natural sciences MACROINVERTEBRATE COMMUNITIES Ciencias Biológicas Abundance (ecology) Environmental science Water quality Species richness Periphyton TOTAL SUSPENDED SOLIDS CIENCIAS NATURALES Y EXACTAS LOW-ORDER STREAMS Total suspended solids |
| Zdroj: | International Journal of Wildland Fire. 27:457 |
| ISSN: | 1049-8001 |
| DOI: | 10.1071/wf17164 |
| Popis: | In March-April 2015, the El Cristo fire burned 1228 ha of mixed Nothofagus forest in Los Alerces National Park (Argentine Patagonia). We compared physicochemical variables and community structure of burned and unburned headwater streams. Sampling began shortly after the fire was extinguished and comprised periodic water quality assessments and four visits to collect periphyton and invertebrate samples (May, August, October and December). Water temperature, total dissolved solids, total suspended solids and specific conductance were significantly higher in burned sites, whereas nutrient and oxygen concentrations exhibited no major differences. Chlorophyll a (used as a surrogate for autotrophic periphyton biomass) also did not differ significantly. Macroinvertebrate richness, abundance and diversity showed no differences across sites, but taxonomic composition and densities of sensitive taxa were markedly lower at burned streams. Oligochaetes and amphipods, however, were significantly more abundant in the disturbed reaches. Analysis of functional feeding groups revealed that the relative abundances of shredders and collector-filterers were lower at burned sites, possibly reflecting a shift in detrital input. Fil: Williams Subiza, Emilio Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina Fil: Brand, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina |
| Databáze: | OpenAIRE |
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