As a powerful approach,the advantage of usig remote sensing to estimate and supervise net primary productivity of terrestrial vegetation lies not only in that it is free from a lot of trivially detailed field works,bu...As a powerful approach,the advantage of usig remote sensing to estimate and supervise net primary productivity of terrestrial vegetation lies not only in that it is free from a lot of trivially detailed field works,but also in that it realizes the estimation of NPP in a large region.So it largely pushes forward global change research.According to this kind of approach,this paper mainly discusses on the role of vegetation index,PAR and light energy efficiency on the estimation of NPP,and puts forward a few suggestions on improving the NPP models.展开更多
Geographic information system (GIS) is a powerful tool to store, to manipulate and to analyse large spatiotemporal data and it has been applied to the research for marine fisheries since late 1980’s. The development ...Geographic information system (GIS) is a powerful tool to store, to manipulate and to analyse large spatiotemporal data and it has been applied to the research for marine fisheries since late 1980’s. The development of marine fishery geographic information system can be divided into three phases: mapping, electronic atlas and information system. It has been used in evaluation of fish habitats, relating fish distributions to environment, site selection for mariculture and building the position related fishery database, etc. And it can also be applied to the fishery modeling, artificial enhancement, fishing quotas management, etc.展开更多
文摘As a powerful approach,the advantage of usig remote sensing to estimate and supervise net primary productivity of terrestrial vegetation lies not only in that it is free from a lot of trivially detailed field works,but also in that it realizes the estimation of NPP in a large region.So it largely pushes forward global change research.According to this kind of approach,this paper mainly discusses on the role of vegetation index,PAR and light energy efficiency on the estimation of NPP,and puts forward a few suggestions on improving the NPP models.
文摘Geographic information system (GIS) is a powerful tool to store, to manipulate and to analyse large spatiotemporal data and it has been applied to the research for marine fisheries since late 1980’s. The development of marine fishery geographic information system can be divided into three phases: mapping, electronic atlas and information system. It has been used in evaluation of fish habitats, relating fish distributions to environment, site selection for mariculture and building the position related fishery database, etc. And it can also be applied to the fishery modeling, artificial enhancement, fishing quotas management, etc.
