@article{fdi:010092251,
  title = {{P}opulation-level habitat breadth varies with richness in reef fishes},
  author = {{G}ranot, {I}. and {K}ulbicki, {M}ichel and {V}igliola, {L}aurent and {B}elmaker, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}im{I}t has been hypothesised that niche breadth decreases with richness due to interactions, such as competition, forcing species to specialise. {T}his hypothesis has been tested at the community-level using species-level niche breadth estimates. {H}owever, evidence for changes in niche-breath among populations of the same species are scant. {O}ur aim was to examine the niche breadth to richness relationship within species, which is crucial for understanding the role of interactions, as opposed to large-scale climate, in altering realised niche breadth. {L}ocation {T}he {P}acific {O}cean.{T}ime {P}eriod 1988-2015. {M}ajor {T}axa {S}tudied {F}ishes. {M}ethods {W}e focus on reef fishes along a large-scale richness gradient not accompanied by marked environmental changes. {F}ishes were surveyed in four distinct habitats, which allow to estimate habitat-breadth for each population. {W}e calculated habitat-breadth across multiple populations of 154 species, and tested how habitat-breadth varied with richness. {W}e further tested the effect of traits and trait-distinctiveness on the richness-sensitivity of habitat-breadth.{R}esults{H}abitat-breadth varied with species traits, with larger species more commonly habitat generalists while schooling and planktivorous species more commonly habitat specialists. {I}mportantly, habitat-breadth was negatively correlated with richness for 109 out of the 154 species, and, across all species, the relationship was highly significant. {W}e found some support that species with distinct traits displayed less sensitivity of habitat-breadth to richness, but the relationship was dependent on the type of trait-distinctiveness index used.{C}onclusions{T}his is the first large-scale evidence that population-level habitat-breadth changes with richness. {R}esults suggest that the realised niche is population-specific and that niche breadth is reduced in high-diversity settings where more intense interactions, such as competition, are expected. {T}his implies that populations, specifically in species rich areas, do not use their entire fundamental niche. {T}herefore, the ability to predict habitat preferences response to global changes based on current habitat associations, without accounting for species interactions, may be limited.},
  keywords = {biotic interactions ; coral reefs ; habitat preference ; niche breadth ; specialisation ; trait distinctiveness ; traits ; {PACIFIQUE}},
  booktitle = {},
  journal = {{G}lobal {E}cology and {B}iogeography},
  volume = {34},
  numero = {1},
  pages = {e13948 [13 p.]},
  ISSN = {1466-822{X}},
  year = {2025},
  DOI = {10.1111/geb.13948},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092251},
}