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BEAT+ Analysis of Marine Benthic Indicators, Jan. 2020
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Map of integrated BEAT+ assessment of Europe’s benthic habitats suggests that 58 % of the total shallow water seabed area is not in good status. The respective score varied among the sea regions: 63 %, 100 %, 98 % and 44 % of the areas assessed in the Baltic, the Black Sea, the Mediterranean and the NE Atlantic. The assessed area excludes areas where the seabed is more than 2 km below the surface as data for these areas, such as from commercial fishing, are sparse.</SPAN></P><P><SPAN /></P><P><SPAN>The BEAT+ tool integrates data from normalised indicators to identify worst case status measures for different biodiversity components. The results are then linked to a standard gridE based Spatial Assessment Unit (SAU) which is used both for biodiversity and for pressures assessments (Andersen et al., 2014).</SPAN></P><P><SPAN /></P><P><SPAN>These grid-based SAUs not only allow alignment of indicators for biodiversity and for pressures but provide a means for combining large assessment areas (e.g. for wide‐ranging species) with point data collected from biological surveys e.g. WFD monitoring.</SPAN></P><P><SPAN /></P><P><SPAN>BEAT+ tool works by calculating a Biological Quality Ratio (BQR) which is an aggregated score of indicator outcomes within a grid square. To allow objective comparison, the indicator outcomes are normalised to a scale of 0 to 1, with five status classes at equal intervals on that scale (from Bad starting at 0, Poor at 0.2, Medium at 0.4, Good at 0.6 and High at 0.8). By this means, indicators based on different biological criteria can be aggregated in a consistent way.</SPAN></P><P><SPAN /></P><P><SPAN>Report reference: https://www.eionet.europa.eu/etcs/etc-icm/products/biodiversity-in-europes-seas</SPAN></P></DIV></DIV></DIV>
Status of benthic habitats per assessment grid cell in European marine regions.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>no limitations to public access</SPAN></P><P><SPAN /></P><P><SPAN>EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (http://www.eea.europa.eu/legal/copyright). Copyright holder: European Environment Agency (EEA).</SPAN></P></DIV></DIV></DIV>
geospatial data
European
The BEAT+ analyses for benthic habitats is based on a diverse set of indicators. Some are primarily designed for coastal use especially those used to meet WFD monitoring. There are a number of WFD indices measuring coastal invertebrate or macrophyte communities, for example. One advantage of the BEAT+ tool is that WFD data, being largely point sample based, matches automatically to an assessment grid square; there is no need to depend on the complex intercalibration exercises needed for water body assessments.
However, there are fewer biotic samples available for most countries than for chemical status data, in part because they have more complex monitoring requirements and also because they are only required for a narrower strip of coastal waters. This means that on the overall assessment maps (HELCOM, 2018g), the overall spatial coverage is very low. Away from the coasts, it is necessary to use more pressure-based indicators such as OSPAR’s BH3 (a measure of physical damage by matching fishing and other pressures to benthic habitat sensitivity) and the community-based ones being developed for soft-‐sediment habitats in HELCOM and the BH2 indicator for OSPAR which is evaluating the use of multi-‐metric indices for benthic habitats in offshore waters.
The map also includes data from commercial invertebrate fisheries (e.g. Nephrops) where the catch mortality gives an indicator of conditions.
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