<b>Pollinator data from transect walks</b> - bees and hoverflies in agroforestry and monoculture systems

Data on bee and hoverfly observations during transect walks, used for the analysis presented in Varah, A., Jones, H., Smith, J., &amp; Potts, S. G. (2020). Temperate agroforestry systems provide greater pollination service than monoculture. <i>Agriculture, Ecosystems &amp; Environment</i>, <i>301</i>, 107031. https://doi.org/10.1016/j.agee.2020.107031<b>.</b>This data was collected on standardised transect walks between 2011-2013 at six agroforestry sites in the UK. Details of methodology are given in the publication. All farmers gave approval for data collection at their sites.Columns A-AA give details of sites, dates of visits, position on transect, and environmental variables.Columns AB-AP give abundance counts for bees and hoverflies. Bumblebees were recorded at the level of individual species (columns AB-AN), apart from Bombum terrestris and Bombus lucorum which were recorded as one aggregate species. Solitary bees and hoverflies were not identified to species.Where columns of abundance counts have NA values this is because the data for that species or taxon was not used in the analysis. Reasons for exclusions are given in the paper. Full data without exclusions is available on request.Below are details of column names where their content is not immediately obvious:<i>visit</i> - we sequentially numbered visits to each site. At site WAF there is no visit 8 because the data from that visit was not used in the analysis. Reasons for this are given in the paper.<i>jdate</i> - number of days since 1st March<i>starttime</i> / <i>enddime</i> - the start and end of the transect. Where it was necessary to stop to catch and identify a bee, the transect walk was paused. This means that transects are not all of equal time length, although time actually spent walking and searching for pollinators was standardised.<i>landuse</i> - p, pasture; a, arable<i>treatment</i> - AF, agroforestry; MC, monoculture<i>alleywidth</i> - distance between tree rows, in meters<i>alleylength</i> - the length of tree rows, in meters<i>hedg.dist</i> - the shortest distance between the transect and the nearest hedgerow<i>boundSR.all</i> - plant species richness in field boundaries (both hedges and margins)<i>boundSR.ip</i> - the species richness of insect-pollinated plants in field boundaries (both hedges and margins)<i>bound.area</i> - the area covered by the field boundaries<i>n.hedg.bound</i> - the number of hedged field boundaries<i>n.hedg.trees</i> - the number of trees in field boundaries<i>snh</i> - the percentage of semi-natural habitat (SNH) in a 1 km buffer around field perimeters<i>tran.pos</i> - whether that part of the transect was at the edge or the centre of an alley<i>tran.dist</i> - each transect was separated into 25 meter sections, and this variable specifies the section<i>sun</i> - the percentage of the transect that was sunny (time estimated during transect)<i>beeact</i> - a subjective indication of how active bees were during the transect ('low', 'medium' or 'high' activity)<i>wind</i> - how windy it was during the transect, using Beaufort scale values