Data and code for case study bridging macroecology and temporal dynamics to better attribute global change impacts on biodiversity

The ongoing biodiversity crisis presents a complex challenge for ecological science. Despite a consensus on general biodiversity decline, identifying clear trends remains difficult due to variability in data, methodologies, and scales of analysis. To enhance our understanding of ongoing biodiversity changes and address discrepancies in biodiversity trend detection, we propose integrating macroecological theory with temporal and trait-based perspectives.

First, analyzing temporal changes in diversity scaling relationships, such as species accumulation curves or distance decay, can reconcile and synthesize conflicting observations of biodiversity change, enabling quantification of diversity shifts from local to regional spatial scales.
Second, diversity patterns across scales are linked to three proximate components: abundance, evenness, and spatial aggregation of species. Investigating temporal changes in these components provides deeper insights into how human activities directly influ..., Bird community data were from the French Breeding Bird Survey. The French breeding bird survey was designed to monitor population dynamics of common passerine bird species in France. In this survey, skilled volunteer ornithologists count birds at a given site, following a standardized protocol, at the same site, year after year (Jiguet et al. 2012). Species abundances are recorded across 2792 sites, each covering a 4km² area. Volunteers provide their home locality to the national coordinator, and a 2×2 km site is randomly selected from within a 10 km radius (out of 80 possible sites) by the coordinator. Each spring, volunteers carry out 10 point counts separated by at least 300 m within the selected site, for a fixed period of five minutes. Two sampling sessions are carried out from 1 April to 8 May, and then from 9 May to the end of June, to detect both early and late breeders, with a gap of 4–6 weeks between sessions. Counts are repeated annually on approximately the same date (±7 day..., , # Data and code for case study bridging macroecology and temporal dynamics to better attribute global change impacts on biodiversity

[https://doi.org/10.5061/dryad.cnp5hqcg9](https://doi.org/10.5061/dryad.cnp5hqcg9)

**Author:** Gazre Pierre (2025)

#### Overview

This repository, archived in \"MacroEcoDynamics_repo.tar,\" contains data and code to replicate all analyses (simulations and case study) presented in the paper. The repository has folders :

* **figures**, an empty folder where figures created will be stored
* **code_outputs**, an empty folder where intermediate. The R data files created will be stored
* **code**, which contains R scripts detailed below
* **data**, which contains the following data files

#### Data file inventory (data folder)

| file name | format | key content |
| -------------------------- | ------------------------...,