Data and code for: Sea level rise causes shorebird population collapse before habitat drowns

Sea level rise causes habitat loss and is considered to be a key threat to coastal species globally. Sea level rise also reduces habitat quality, potentially threatening populations already before habitat drowns and is lost. The extent and timing of changes in habitat quality for wildlife actively adapting to sea level rise, and how this affects population numbers under different emission scenarios, is unknown. Here, we combine long-term field data with models of sea level rise, marsh geomorphology, adaptive behaviour, and population dynamics to show that habitat quality is already declining on three islands due to increased flooding of shorebird nests. Also, population collapses are projected well before habitat drowns. Habitat loss, a widely used proxy, thus severely underestimates population impacts of sea level rise and coastal species will suffer much sooner than previously thought. Despite shorebirds adapting by moving to higher grounds, sea level rise will result in up to 79% few..., See paper for a detailed description of the datasets., , # Data and Code for: 'Sea level rise causes shorebird population collapse before habitat drowns'

[https://doi.org/10.5061/dryad.wm37pvmth](https://doi.org/10.5061/dryad.wm37pvmth)

The repository contains three R files used to run the code, as well as a large number of data files that provide input data needed to initialize the model in R.

## Description of the data and file structure

*Folder and file structure*

There are 6 folders:

* maps
* water
* mining
* bmp
* code
* products

*Elevation maps of three islands from LiDAR data in 2014.*

The folder '**maps**' contains for each island several rasterfiles are available in GeoTiff format downloaded from [https://ahn.arcgisonline.nl/ahnviewer/](https://ahn.arcgisonline.nl/ahnviewer/). Each raster-file contains a 5x5km grid of 0.5x0.5m cells. X and Y coordinates are in RD Dutch Grid (m) and the elevation (m) is relative to Dutch Ordnance level (NAP). Each island encompasses multiple adjacent raster-files.

o   Ameland: M_0...