State of the Arctic Marine Biodiversity Report: chapter 4: Synthesis: Status and trends of Arctic marine biodiversity and monitoring

Synthesis: Status and trends of Arctic marine biodiversity and monitoring. This section summarizes the available information from the CBMP Marine Expert Networks on recent status and trends in biodiversity (e.g., numbers of species, absolute or relative abundance of particular species). For several Expert Networks, the available information is quite limited, and it is therefore difficult to draw general conclusions. In particular, information on spatial variation in trends is limited for most groups, and thus general trends in the Arctic marine region often remain obscure. This section describes the actual changes and trends identified by the Expert Networks; a discussion of the wider implications of these trends can be found in Chapter 4.