The importance of small fire refugia in the central Sierra Nevada, California, USA
| Autor: | Crystal A. Kolden, Arjan J. H. Meddens, Erika M. Blomdahl, James A. Lutz |
|---|---|
| Přispěvatelé: | Elsevier |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Population fire heterogeneity Management Monitoring Policy and Law 010603 evolutionary biology 01 natural sciences Yosemite National Park Basal area Common species Yosemite Forest Dynamics Plot Revegetation education Forest Sciences Nature and Landscape Conservation education.field_of_study Forest dynamics fire mortality Diameter at breast height Forestry Grid cell Smithsonian ForestGEO Forest Management fire severity Geography Taxon 010606 plant biology & botany |
| Zdroj: | Wildland Resources Faculty Publications |
| ISSN: | 0378-1127 |
| DOI: | 10.1016/j.foreco.2018.10.038 |
| Popis: | Fire refugia – the unburned areas within fire perimeters – are important to the survival of many taxa through fire events and the revegetation of post-fire landscapes. Previous work has shown that species use and benefit from small-scale fire refugia (1 m2 to 1000 m2), but our understanding of where and how fire refugia form is largely limited to the scale of remotely sensed data (i.e., 900 m2 Landsat pixels). To examine the causes and consequences of small fire refugia, we field-mapped all unburned patches ≥1 m2 within a contiguous 25.6 ha forest plot that burned at generally low-to-moderate severity in the 2013 Yosemite Rim Fire, California, USA. Within the Yosemite Forest Dynamics Plot (YFDP), there were 685 unburned patches ≥1 m2, covering a total unburned area of 12,597 m2 (4.9%). Small refugia occurred in all fire severity classifications. Random forest models showed that the proportion of unburned area of 100 m2 grid cells corresponded to pre-fire density and basal area of trees, distance to the nearest stream, and immediate fire mortality, but the relationships were complex and model accuracy was variable. From a pre-fire population of 34,061 total trees ≥1 cm diameter at breast height (1.37 m; DBH) within the plot (1,330 trees ha-1), trees of all five of the most common species and those DBH |
| Databáze: | OpenAIRE |
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