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Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily
HOME > Lecture catalog / Research summary > Glossary > Disturbance
Major catastrophic events originating in the physical environment - events which cause abrupt structural change in communities (White 1979)
Problems
Three parameters on disturbances![]() Disturbance regime = determined by the type and three parameters to characterize disturbances shown below:
Scale (size) |
[ natural disturbance | human disturbance ] Type• Natural disturbance• Human disturbance (human-induced disturbance, or anthropogenic disturbance) Ecosystem health (生態系の健全性)a metaphor used to describe the condition of an ecosystemproductivity resilience, and organization, including biodiversity changed by disturbances, e.g., flooding, drought, biological invasion, climate change, mining, overexploitation, and landuse change⇒ the relationship between resilience and diversity |
Volcanic eruption
Landslide
Wildfire
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Sprouting after fire at Boston Creek (May 11 2005) | Moderately disturbed site. Peat moss still remained on the forest floor. | Intensively disturbed site. Peat was completely burned out by fire. Snags could not keep standing (Tsuyuzaki et al. 2014). |
Large-scale
| Global warming (+ ozene hole) Small-scale |
[ occurring with various scales = biological invasion (生物学的侵入)] |