Data for: Recent changes in thermal niche position and breadth of bird assemblages in Spain in relation to increasing temperatures

Aim: Animal communities around the world are responding to climate change by altering their taxonomic composition, mainly through an increase in the colonisation rate of warm-dwelling species and the local extinction of cold-dwelling ones. We assessed whether the taxonomic composition of bird assemblages in peninsular Spain has changed in accordance with the recent increase in temperature. We also evaluated the role of species' thermal affinities and population dynamics in these changes.
Location: Peninsular Spain.
Taxon: Birds.
Methods: We compared assemblages reported in the last Spanish breeding bird atlases (1998–2002 vs 2014–2019) in 10x10 km squares. We described species’ thermal niches by overlaying global species breeding distributions and world temperature metrics (based on mean, minimum, maximum and range), and then aggregated them to obtain a set of community thermal indices for each assemblage (CTIs, and CTR for ranges). Long-term average temperatures and local current tempe..., The dataset is a dataframe that comprises the Community Thermal Indices (response variable) and the environmental and geographic variables employed as predictors of the spatial GLMM. This model related the temperatures to the changes of CTI, considering the habitat (forest) change.
The Community Thermal Indices were computed from the Species Thermal Indices. We obtained four thermal indices for each species (Species Thermal Index – STI) by combining the global species’ distribution and the climate information. The STI1 (i) shows the mean temperature of the breeding season (April-July) throughout the species’ distribution range. Similarly, the STI2 (ii) is the average of the maximum temperatures above the percentile 95 in July, and the STI3 (iii) is the average minimum temperature below the percentile 05 in April in the species’ breeding distribution range. These three indices represent a species’ thermal affinity. On the other hand, the fourth index (iv) (Species Thermal Range - STR) re..., , # Data for: Recent changes in thermal niche position and breadth of bird assemblages in Spain in relation to increasing temperatures

Name: David Ramón-Martínez
ORCID:0000-0001-7537-6254
Institution: Doñana Biological Station (EBD-CSIC)
Address: Amrico Vespucio 26, Sevilla 41092, Spain
Email:

Name: Javier Seoane
ORCID:0000-0001-9975-4846
Institution: Centro de Investigacion en Biodiversidad y Cambio Global, Universidad Autonoma de Madrid (CIBC-UAM); Terrestrial Ecology Group, Department of Ecology, Universidad Autonoma de Madrid(TEG-UAM).
Address: Darwin, 2. Madrid 28049, Spain
Email:

**Aim:** Animal communities around the world are responding to climate change by altering their taxonomic composition, mainly through an increase in the colonisation rate of warm-dwelling species and the local extinction of cold-dwelling ones. We assessed whether the taxonomic composition of bird assemblages in peninsular Spain has changed in accordance with the recent increase in temperature. We also ...