ArticlePloS one2026
Livestock landscapes as ecological filters: Effects of the tree cover gradient on the taxonomic and functional diversity of granivorous birds in the Colombian Amazon.
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Land-use intensification in cattle-ranching landscapes of the Colombian Amazon generates continuous gradients of tree cover that modify the structure of productive mosaics and may function as environmental filters. The effects of this gradient may vary depending on the biodiversity component and the scale of analysis considered. We evaluated how tree cover is associated with the abundance, taxonomic richness, and functional diversity of the granivorous bird guild in cattle-ranching landscapes of the Colombian Amazon. A total of 100 quadrats were sampled along the continuous tree cover gradient. Abundance and local richness were analyzed using generalized linear mixed models with a negative binomial distribution. Taxonomic diversity pooled by cover type was estimated using Hill numbers with explicit control of sampling completeness. Functional structure was assessed using multidimensional indices (FRic, FEve, FDiv, FDis, and RaoQ) and multivariate trait-based analyses (RLQ and fourth-corner tests). Tree cover had a significant effect on local abundance, whereas quadrat-level richness showed only a marginal response. Taxonomic diversity was higher in structurally more heterogeneous covers, consistent with greater spatial turnover. At the functional level, FDis and RaoQ varied among covers, whereas FRic and FEve did not differ significantly. RLQ analysis identified significant covariation between proportions of tree cover and traits associated with body size and bill and tarsus morphology in granivorous birds. Overall, the results describe a partial and scale-dependent reorganization of the granivorous assemblage along the structural gradient. Although consistent with theoretical expectations of environmental filtering, these patterns should be interpreted as observational associations rather than causal evidence or direct evaluations of ecosystem functions.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.