Regional Seabed Monitoring Plan (RSMP) Baseline Dataset 2014-2016 dataset https://portal.medin.org.uk/portal/start.php?tpc=009_CEFASaac47680-c7f6-4423-834d-ff164a9d2bf6 This dataset was compiled for the Regional Seabed Monitoring Plan (RSMP) baseline assessment reported in Cooper & Barry (2017). The dataset comprises of 33,198 macrofaunal samples (83 percent with associated data on sediment particle size composition) covering large parts of the UK continental shelf. Whilst most samples come from existing datasets, also included are 2,500 new samples collected specifically for the purpose of this study. These new samples were collected during 2014-2016 from the main English aggregate dredging regions (Humber, Anglian, Thames, Eastern English Channel and South Coast) and at four individual, isolated extraction sites where the RSMP methodology is also being adopted (e.g. Area 457, North-West dredging region; Area 392, North-West dredging region; Area 376, Bristol Channel dredging region; Goodwin Sands, English Channel). This work was funded by the aggregates industry, and carried out by contractors on their behalf. Samples were collected in accordance with a detailed protocols document which included control measures to ensure the quality of faunal and sediment sample processing. Additional samples were acquired to fill in gaps in spatial coverage and to provide a contemporary baseline for sediment composition. Sources of existing data include both government and industry, with contributions from the marine aggregate dredging, offshore wind, oil and gas, nuclear and port and harbour sectors. Samples have been collected over a period of 48 years from 1969 to 2016, although the vast majority (96%) were acquired since 2000. Samples have been collected during every month of the year, although there is a clear peak during summer months when weather conditions are generally more favourable for fieldwork. Reference: Cooper, K.M., Barry, J. doi: 10.1038/s41598-017-11377-9 (2017) `A big data approach to macrofaunal baseline assessment, monitoring and sustainable exploitation of the seabed`_ .. _`a big data approach to macrofaunal baseline assessment, monitoring and sustainable exploitation of the seabed`: https://www.nature.com/articles/s41598-017-11377-9 20170928 20170216