DOI: 10.5061/dryad.36p1418
title: Data from: Trap nests for bees and wasps to analyse trophic interactions in changing environments - a systematic overview and user guide

description: 1. Trap nests are artificially made nesting resources for solitary
 cavity-nesting bees and wasps and allow easy quantification of multiple
 trophic interactions between bees, wasps, their food objects and natural
 enemies. 2. We synthesized all trap nest studies available in the ISI Web
 of Science™ to provide a comprehensive overview of trap nest research and
 identify common practical challenges and promising future research
 directions. 3. Trap nests have been used on all continents and across
 climate zones and publication numbers have increased exponentially since
 the first studies in the 1950s. Originally used for detailed exploratory
 natural history observations, trap nests are now also an established
 method in hypothesis-driven ecology and to assess environmental changes.
 We identify the potential of trap nests for environmental monitoring by
 assessing trophic interaction networks of the groups involved. While
 pollen collection by bees or prey hunting by wasps has often been
 addressed, and interactions with natural enemies were included in almost
 half of all publications, surprisingly few studies have quantified trophic
 interaction networks in response to natural and anthropogenic
 environmental changes. 4. By simultaneously revealing a multitude of
 trophic interactions, trap nests have the potential to broaden our
 understanding how species interaction networks are influenced by manifold
 environmental changes, which are pressing topics in ecological research.
 To foster the use of trap nests in future studies, we identify common
 challenges and offer guidance on practical solutions.
description: Data for Staab et al.
 MEEThe excel file ‘Data for
 Staab et al. MEE’ contains 4 separate spreadsheets (‘column_headers’ /
 ‘raw_data’ / ‘data_mapping’ / ‘research_topics_year’). Spreadsheet
 ‘column_headers’ explains the content of each column in the 3 other
 spreadsheets. Spreadsheet ‘raw_data’ contains the full raw details of the
 literature search. Please see the ‘column_headers’ spreadsheet for details
 of each column. Spreadsheet ‘data_mapping’ contains the locality
 information for all studies. In the rare case that a study had several
 broadly separated sampling locations within a country, one of these
 localities was randomly selected for the spatial analyses (specified by
 ‘yes’ in column ‘taken_in_case_of_multiple_sites’). However, if a study
 had sampling sites in more than one country, one locality for each country
 was taken. The same was done if sampling sites of a publication included
 several political units (states or provinces) within the ten largest
 countries of the world, of which Argentina, Australia, Brazil, Canada,
 China, and the USA have trap nest studies. In these cases, the entry in
 the ‘study_ID’ appears multiple times, once for each locality). This
 dataset can be used to reproduce the geographic and climatic analyses
 shown in Figure 2. Please see also the ‘column_headers’ spreadsheet.
 Spreadsheet ‘research_topics_year’ contains the categorized topics
 (aggregated per year) of all 481 studies identified with the keyword
 search in in the ISI Web of Science™ (until 2016) (see Table 2 in the
 publications). Numbers are mutually non-exclusive because a single study
 can address several topics. Column ‘n_studies’ gives the total number of
 studies for every year. This dataset can be used to reproduce the analyses
 shown in Table 3 and Figure 3.