Is a restricted niche the explanation for species vulnerability? Insights from a large field survey of Astragalus tragacantha L. (Fabaceae)
Authors/Creators
- 1. Aix-Marseille University
- 2. Conservatoire Botanique National Méditerranéen de Porquerolles
- 3. Parc National des Calanques*
Description
In this study, we examine the realized niche of A. tragacantha in Provence. We focus our fieldwork on habitat characteristics, floristic survey and perform an exhaustive demographic census. We base our analyses on total density and densities of different size stages of A. tragacantha. We delineate its realized ecological niche with the Outlying Mean Index (OMI) multivariate method and estimated the effects of environmental gradients on A. tragacantha populations with the Generalized Joint Attribute Modelling method (GJAM). Analyses based on occurrence data did not support the hypothesis that a too narrow niche by itself explains the vulnerability of A. tragacantha. However, niche modelling revealed differences among size stages supporting a restricted regeneration niche and a wider ecological range in the past.
This dataset is accompanying the manuscript published in Flora "Is a restricted niche the explanation for species vulnerability? Insights from a large field survey of Astragalus tragacantha L. (Fabaceae)"
Notes
Data files and R scripts to conduct OMI and GJAM methods are provided and described in the Readme file.
Funding provided by: European Commission
Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100000780
Award Number: LIFE16 NAT / FR / 000593
Files
Demo_GJAM.txt
Additional details
Related works
- Is cited by
- 10.1016/j.flora.2021.151902 (DOI)
- Is derived from
- 10.5281/zenodo.5388500 (DOI)
- Is source of
- 10.5281/zenodo.5388504 (DOI)