DOI: 10.5061/dryad.ft3tq32
title: Data from: Bumble-BEEHAVE: a systems model for exploring multifactorial causes of bumblebee decline at individual, colony, population and community level

description: 1. Worldwide declines in pollinators, including bumblebees, are attributed
 to a multitude of stressors such as habitat loss, resource availability,
 emerging viruses and parasites, exposure to pesticides, and climate change
 operating at various spatial and temporal scales. Disentangling individual
 and interacting effects of these stressors, and understanding their impact
 at the individual, colony and population level is a challenge for systems
 ecology. Empirical testing of all combinations and contexts is not
 feasible. A mechanistic multi-level systems model
 (individual-colony-population-community) is required to explore resilience
 mechanisms of populations and communities under stress. 2. We present a
 model which can simulate the growth, behaviour and survival of six UK
 bumblebee species living in any mapped landscape. Bumble-BEEHAVE
 simulates, in an agent-based approach, the colony development of
 bumblebees in a realistic landscape to study how multiple stressors affect
 bee numbers and population dynamics. We provide extensive documentation,
 including sensitivity analysis and validation, based on data from
 literature. The model is freely available, has flexible settings and
 includes a user manual to ensure it can be used by researchers, farmers,
 policy-makers, NGO's or interested lay people. User support will be
 provided via the BEEHAVE website (http://beehave-model.net/) and social
 media. 3. Model outcomes compare well with empirical data for individual
 foraging behaviour, colony growth and reproduction, and estimated nest
 densities. 4. Simulating the impact of reproductive depression caused by
 pesticide exposure shows that the complex feedback mechanisms captured in
 this model predict higher colony resilience to stress than suggested by a
 previous, simpler model. 5. Synthesis and applications: Bumble-BEEHAVE
 represents a significant step towards predicting bumblebee population
 dynamics in a spatially explicit way. It will enable researchers to
 understand the individual and interacting effects of the multiple
 stressors affecting bumblebee survival and the feedback mechanisms that
 may buffer a colony against environmental stress, or indeed lead to
 spiralling colony collapse. The model can be used to aid the design of
 field experiments, for risk assessments, to inform conservation and
 farming decisions and for assigning bespoke management recommendations at
 a landscape scale.27-Mar-2018
description: TripDurationsDefaultResults of the Bumble-BEEHAVE simulation described in 1. Individual level comparisonColony_Validation_1_250Results of the Bumble-BEEHAVE simulations presented in 2. Colony level comparison (runs 1 - 250)Colony_Validation_251_7500Results of the Bumble-BEEHAVE simulations presented in 2. Colony level comparison (runs 251 - 7500)Population_ValidationResults of the Bumble-BEEHAVE simulations presented in 3. Population level comparisonSingleHabitatPatchResults of the Bumble-BEEHAVE simulation described in 4. Model applications: Setting/Output 1Baron_500initialQueensResults of the Bumble-BEEHAVE simulation described in 4. Model applications: Setting/Output 2 with 500 initial queenBaron_7500initialQueensResults of the Bumble-BEEHAVE simulation described in 4. Model applications: Setting/Output 2 with 7500 initial queens