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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
black spruce forests in Alaska (Tsuyuzaki et al. 2014) |
[ flood disaster ( 水害 )] Floodplain (氾濫原)Pattern of vegetation zonantion on Sorachi River floodplain![]() Disturbacnes, such as flood, are important for the vegetation zonation Human activities destroy the zonation: dam construction + global warming |
Large-scale
| Global warming (+ ozene hole) Small-scale |
[ occurring with various scales = biological invasion (生物学的侵入)] |
environments that are considered hard to survive in due to its extreme conditions such as temperature, accessibility to different energy sources or under high pressure
Alpine (高山)Alpine zone (高山帯) |