DOI: 10.5061/dryad.8n4p8
title: Data from: Small-scale restoration in intensive agricultural landscapes supports more specialized and less mobile pollinator species

description: 1. Agriculture now constitutes 40–50% of terrestrial land use globally. By
 enhancing habitat suitability and connectivity, restoration within
 agricultural landscapes could have a major influence on biodiversity
 conservation. However, habitat management within intensive agricultural
 landscapes may primarily boost abundances of common, highly mobile
 generalists, rather than vulnerable or endangered species. We studied
 pollinator community response to small-scale habitat restoration in the
 intensively farmed Central Valley of California to determine whether
 restoration could also promote more specialized, less common, and/or less
 mobile species. 2. Composition of pollinator communities was assessed in
 five experimental and 10 control (unrestored) sites before and after
 restoration of native plant hedgerows over an 8-year period, using a
 before-after-control-impact design. 3. We characterized bee and fly
 species based on functional response traits [floral specialization,
 habitat specialization, abundance, body size, and sociality (bees only)]
 known to influence the response to habitat change. 4. We modelled how
 species occurrences changed with habitat restoration over time as
 modulated by their response traits. 5. We found that hedgerows not only
 significantly enhanced occurrences of native bee and syrphid fly species,
 but that as hedgerows matured, they had a greater positive effect on
 species that were more specialized in floral and nesting resources and
 smaller (less mobile). 6. Synthesis and applications. Unlike previous
 studies that suggest habitat restoration in agricultural landscapes only
 benefits mobile, generalist species, our results suggest that small-scale
 habitat restoration can promote species whose traits likely render them
 particularly vulnerable to habitat degradation. Thus, even within highly
 intensive agricultural landscapes, small-scale habitat restoration can be
 a conservation management tool. However, tailoring habitat enhancements to
 promote certain species or guilds may be critical for their success as a
 conservation intervention in agricultural landscapes.
description: Bee occurrence and trait
 dataSpreadsheet containing
 trait and occurrence data for bee species. Column names are as follows:
 GenusSpecies = taxonomic ID, Year = sampling year, Day = Day of the year,
 ypr = Years post restoration (equal to -1 for non-restored state),
 Presence = presence/absence of species, NestLoc = nesting location,
 Excavate = nesting habit, Sociality = sociality, Lecty = lecty, MeanITD =
 Ln(inter-tegular span distance), d = level of resource specialization,
 abun = species abundance.bee.csvSyrphid fly occurrence and trait dataSpreadsheet containing trait and occurrence data for syrphid fly species. Column names are as follows: GenusSpecies = taxonomic ID, Year = sampling year, Day = Day of the year, ypr = Years post restoration (equal to -1 for non-restored state), Presence = presence/absence of species, LarvalDiet = larval diet type, AdultDiet = adult diet type, BodyLength = Ln(dorsal body length) measured from front of head to tip of abdomen, WingLength = Ln(length of wing), HeadWidth = Ln(width of head), d = level of resource specialization, abun = species abundancesyr.csv