Forest insect pests are severe disturbance factors in forest ecosystems, inducing the diverse negative impacts on the forestry economy, ecosystem service, biodiversity, and sustainable ecosystem management. Majority of forest insect pests are invasive species in many countries. To understand the occurrence patterns including population dynamics and dispersal of species, ecological modelling is popularly considered as a tool. Ecological modelling can provide information that is required for decision making through hazard ratings, the examination of potential impacts, and the prediction of dispersal patterns for forest pests. In this study, we review the modelling methods and present some case studies conducted in Korean forests.

Ecological communities have high variability with complex interactions between biological components as well as withtheir environmental factors. To characterize the properties of communities, much works used species diversity concerningtaxonomic richness. Meanwhile, functional diversity based on biological traits are frequently used in recent communitystudies. Functional diversity is the extent of functional differences among species, driving the relationship between biodiversityand ecosystem functioning. Therefore, understanding the relationship between species diversity and functional diversityis fundamental in community ecology as well as conservation biology. Many studies presented that biological traits areefficient to achieve a predictive framework for ecosystem functioning. In this study, we present the relationship betweenspecies diversity and functional diversity.

Introduction of invasive species into a new ecosystem may have various impacts such as including environmental harm,economic harm, or impact human health. After the establishment of population in a new area, a range of its habitat isexpanded. Hazard assessment for invasive species provides fundamental information for identifying current or future hazardouscondition, and it is important for the surveillance of pest occurrence as well as the development of control strategy. Itcan be also used for determining control areas and methods. Various approaches have been used in the hazard assessmentfor forest invasive species including statistical model, aerial approaches, and machine learning models. In this study, wepresent some approaches in the hazard assessment for forest pests including pine needle gall midge and pine wilt disease.

Understanding population dynamics is an important issue in population ecology because it can provide insight into factors determining population behavior as well as providing guidelines for population management. Complex population dynamics generally result from the combined influences of both intrinsic and exogenous forces. Therefore suitable analyzing methods are needed. In this presentation, various time series analyses approaches such as autocorrelation, Fourier Transformation, Cross-correlation, synchrony etc. will presented to extract information embedded in the population data observed in agricultural and forest ecosystems.

Benthic macro invertebrate communities were collected at six different sampling sites in the Musucheon stream in Korea from July 2006 to July 2007, and ecological exergy values were calculated based on five different functional feeding groups (collector-g

본 연구는 우리나라 서해안에서 월동하는 수조류 군집의 특성 및 환경요인에 따른 분포 특성을 밝히고자 수행되었다. 수조류 군집조사는 10개 지역에서 실시되었으며, 환경요인으로 토지피복도 비율을 측정하였다. 전체 조사지역에서 종 구성은 수면성 오리류가 84%로 가장 높은 비율을 나타냈고, 그 외 잠수성 오리류, 섭금류, 기러기류, 갈매기류 등이 많이 관찰되었다. 가장 높은 우점도를 나타낸 종은 청둥오리(Anas platyrhynchos)였으며 다음으로 가창