5ab2a3b0-6af9-4946-b491-c3c42da3a190 Tom Barry Executive Secretary +354 4623350 Borgir, Nordurslod Akureyri 600 Iceland http://caff.is WWW:LINK-1.0-http--link 08:00 - 16:00 GMT 2023-02-13T14:00:05 ISO 19115:2003/19139 1.0 Seamounts 2016-02 http://localhost:8080/demodem/editioin Seamounts and knolls are ‘undersea mountains’, the former rising more than 1000 m from the seafloor. These features provide important habitats for aquatic predators, demersal deep-sea fish and benthic invertebrates. However most seamounts have not been surveyed and their numbers and locations are not well known. Previous efforts to locate and quantify seamounts have used relatively coarse bathymetry grids. Here we use global bathymetric data at 30 arc-second resolution to identify seamounts and knolls. We identify 33,452 seamounts and 138,412 knolls, representing the largest global set of identified seamounts and knolls to date. We compare estimated seamount numbers, locations, and depths with validation sets of seamount data from New Zealand and Azores. This comparison indicates the method we apply finds 94% of seamounts, but may overestimate seamount numbers along ridges and in areas where faulting and seafloor spreading creates highly complex topography. The seamounts and knolls identified herein are significantly geographically biased towards areas surveyed with shipbased soundings. As only 6.5% of the ocean floor has been surveyed with soundings it is likely that new seamounts will be uncovered as surveying improves. Seamount habitats constitute approximately 4.7% of the ocean floor, whilst knolls cover 16.3%. Regional distribution of these features is examined, and we find a disproportionate number of productive knolls, with a summit depth of o1.5 km, located in the Southern Ocean. Less than 2% of seamounts are within marine protected areas and the majority of these are located within exclusive economic zones with few on the High Seas. The database of seamounts and knolls resulting from this study will be a useful resource for researchers and conservation planners. Reference: Yesson, C., et al., The global distribution of seamounts based on 30 arc seconds bathymetry data. Deep-Sea Research I (2011 Tom Barry Executive Secretary +354 4623350 Borgir, Nordurslod Akureyri 600 Iceland http://caff.is WWW:LINK-1.0-http--link 08:00 - 16:00 GMT https://geo.abds.is/geonetwork/srv/api/records/5ab2a3b0-6af9-4946-b491-c3c42da3a190/attachments/Figure 1.17-1 Seamount Locations.jpg large_thumbnail jpg abiotic marine seafloor protected areas 50000 -179.979167 179.983333 -75.145264 84.979736 You can customize the template to suit your needs. You can add and remove fields and fill out default information (e.g. contact details). Fields you can not change in the default view may be accessible in the more comprehensive (and more complex) advanced view. You can even use the XML editor to create custom structures, but they have to be validated by the system, so know what you do :-) WWW:LINK-1.0-http--link OGC:WMS-1.3.0-http-get-map seamounts_yesson WMS Service https://geo.abds.is/geonetwork/srv/api/records/5ab2a3b0-6af9-4946-b491-c3c42da3a190/attachments/Figure 1.17-1 Seamount Locations.jpg WWW:DOWNLOAD-1.0-http--download Figure 1.17-1 Seamount Locations.jpg Image https://geo.abds.is/geonetwork/srv/api/records/5ab2a3b0-6af9-4946-b491-c3c42da3a190/attachments/Seamounts_yesson.zip WWW:DOWNLOAD-1.0-http--download Seamounts_yesson.zip Shape file https://geo.abds.is/geoserver/ebsa/wms? OGC:WMS-1.3.0-http-get-map seamounts_yesson seamounts_yesson