Article (Scientific journals)
Ecological niche distribution along soil toxicity gradients: Bridging theoretical expectations and metallophyte conservation
Boisson, Sylvain; Monty, Arnaud; Seleck, Maxime et al.
2020In Ecological Modelling, 415
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Abstract :
[en] Ecological niche modelling helps us to understand the spatial assembly of species in heterogeneous environments. Three patterns have been widely reported in the research literature regarding the relationship between realised niches and macronutrient concentration gradients: (1) species’ optima are unevenly distributed, with a higher frequency in mesic conditions; (2) species’ response curves are narrower when optima density is higher; and (3) species with optima at the extremes of the gradients have skewed response curves with a longer tail toward mesic conditions. This study aims to test the existence of these patterns on a vegetation model occurring in metalliferous soils comprising copper and cobalt along a toxicity gradient in south-eastern D.R. Congo. Realised niches of 80 taxa were modelled using generalised additive models. The niche optima and the niche widths were determined for each taxon. Results highlighted three groups which differ according to the niche optima location along the soil metal concentration gradients. The patterns found along macronutrient concentration gradients were, to some extent, transposable along micronutrient concentration gradients. Our findings on the diversity and assembly of realised niches has consequences for plant conservation strategies.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Boisson, Sylvain ;  Université de Liège - ULiège > Département GxABT > Biodiversité et Paysage
Monty, Arnaud ;  Université de Liège - ULiège > Département GxABT > Biodiversité et Paysage
Seleck, Maxime  ;  Université de Liège - ULiège > Département GxABT > Biodiversité et Paysage
Ngoy Shutcha, Mylor
Faucon, Michel-Pierre
Mahy, Grégory ;  Université de Liège - ULiège > Département GxABT > Biodiversité et Paysage
Language :
English
Title :
Ecological niche distribution along soil toxicity gradients: Bridging theoretical expectations and metallophyte conservation
Publication date :
01 January 2020
Journal title :
Ecological Modelling
ISSN :
0304-3800
eISSN :
1872-7026
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
415
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 January 2020

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