Vegetation changes in blown-down and scorched forests 10–26 years after the eruption of Mount St. Helens, Washington, USA
| Autor: | Charles B. Halpern, James E. Cook |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Ecology Biodiversity Species diversity Plant Science Ecological succession Vegetation Biology 010603 evolutionary biology 01 natural sciences Seral community Abundance (ecology) Plant cover Species richness 0105 earth and related environmental sciences |
| Zdroj: | Plant Ecology. 219:957-972 |
| ISSN: | 1573-5052 1385-0237 |
| Popis: | We examine patterns of vegetative change in blown-down and scorched forests in the blast zone of Mount St. Helens (USA), 10–26 years after the eruption. We compare trends in community attributes in four post-eruption environments, or site types, defined by severity of disturbance, presence/absence of a protective snowpack at the time of eruption, and seral state (previously clearcut vs. mature/old forests). Permanent plots established in 1980 at 16 sites were sampled at 5- to 6-year intervals between 1989 and 2005. Data on species presence and abundance were used to characterize changes in total plant cover, life-form spectra, species diversity, species turnover, and community composition. Due to the magnitude and heterogeneity of disturbance, vegetation re-establishment was gradual and highly variable among sites. Total plant cover averaged 36–70% after 26 years. Early-seral forbs were dominant except in snow-protected sites, where surviving shrubs were most common. Tree regeneration remained sparse after 26 years ( |
| Databáze: | OpenAIRE |
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