Essential biodiversity variables for measuring change in global freshwater biodiversity

摘要: A critical requirement in assessing progress towards global biodiversity targets is improving our capacity to measure changes biodiversity. Global declined between 2000 and 2010, there are indications that the decline was greater freshwater than terrestrial or marine systems. However, data, tools methods available during decade were inadequate reliably quantify this decline. Recent advances monitoring make a assessment now close becoming feasible. Here we identify priorities for 2020 2030, based on Essential Biodiversity Variables (EBV) framework. We 22 priority activities under three of EBV classes (species populations, community composition, ecosystem structure), which include: globally systematic approach collecting species collating existing new data within platforms, coordinated effort mapping wetland extent at high spatial resolution, linking in-situ modelling across regions, mobilising citizen science collection verification data. Accomplishing these will allow state be assessed according Red List Index with expanded geographic taxonomic cover, an improved Living Planet number phylogenetic range species, measures alpha beta diversity, globally-consistent estimates extent. To assess variables other (genetic traits, function) 15 priorities, include development environmental DNA methods, species-traits databases, eco-informatics over next 15 years.