생태계 기반 어업자원의 시공간적 평가와 예측 연구

Abstract

Integrated fisheries risk analysis method for ecosystems (IFRAME) has been developed to accomplish the goals of an ecosystem approach to fisheries (EAF) proposed to overcome the shortcomings of single-species approach. This approach performs an ecosystem-based assessment, forecasting and management incorporating a couple of ecosystem models, such as the ecosystem-based fisheries assessment approach (EBFA) which is an ecosystem risk analysis tool, and the EwE which is a static and dynamic ecosystem modeling. However, this IFRAME approach does not explain spatial variations of ecosystem components. The IFRAME was extended to assess and forecast ecosystem dynamics and risk indices in a spatiotemporal context in this study. The extended IFRAME has two more components than the original approach. First, a spatial component was added to explain the risk indices by the unit sea block in EBFA. Second, Ecospace, a spatial and temporal dynamic module in EwE model, was added to the forecasting process of the IFRAME. This extended approach was demonstrated by preliminarily applying to the East Sea marine ecosystem, based on four scenarios, considering changes in fishing mortality and habitat preference, which were chosen in the forecasting process. The GIS-based fisheries resource management system was also developed to help making decisions of relevant fisheries issues (fishing, research, management, etc.). In this system a number of real-time data are collected from marine ecosystem and fisheries, and are stored in the integrated database. The collected data in the database are used for the assessment, forecast and management of fisheries and their resources in a marine ecosystem, which can also be displayed in real-time by the user software spatiotemporarily.