Mid-term demographic dynamics in stem exclusion stage of beech forest in Ulleungdo Island, South Korea
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Long-term observation on forest development processes after various disturbances provides the baseline information such as management options including restoration. We examined changes in forest structure and function and patterns of demographic rates (2009-2019) in young beech forest in Ulleungdo Island, South Korea. Change in mean stem density revealed bell-shaped form and growth rate in mean above ground biomass decreased. By predominant stem density and biomass, beech population exhibited strong influence for whole community patterns. Size distributions of tree community revealed influences from maturity and restrained recruitment of trees. Demographic rates showed interesting patterns because recruitment (from 1.3 in to almost 0) and mortality rates (from 0 to 1.8) have abrupt turnover in 2015. Disturbance events from soil deposition originated by heavy rains after 2017 increased stochastic events of tree death (from 0 to 15%). Our results suggest that in stem exclusion stage there were dramatic turnover between stem recruitment and mortality. In addition, disturbance events have influenced to demographic rates by increasing stochastic tree motality.
Keywords: Biodiversity conservation
ID: 3622286