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Understanding different dominance patterns in western Amazonian forests.


ABSTRACT: Dominance of neotropical tree communities by a few species is widely documented, but dominant trees show a variety of distributional patterns still poorly understood. Here, we used 503 forest inventory plots (93,719 individuals ≥2.5 cm diameter, 2609 species) to explore the relationships between local abundance, regional frequency and spatial aggregation of dominant species in four main habitat types in western Amazonia. Although the abundance-occupancy relationship is positive for the full dataset, we found that among dominant Amazonian tree species, there is a strong negative relationship between local abundance and regional frequency and/or spatial aggregation across habitat types. Our findings suggest an ecological trade-off whereby dominant species can be locally abundant (local dominants) or regionally widespread (widespread dominants), but rarely both (oligarchs). Given the importance of dominant species as drivers of diversity and ecosystem functioning, unravelling different dominance patterns is a research priority to direct conservation efforts in Amazonian forests.

SUBMITTER: Matas-Granados L 

PROVIDER: S-EPMC10952671 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Understanding different dominance patterns in western Amazonian forests.

Matas-Granados Laura L   Draper Frederick C FC   Cayuela Luis L   de Aledo Julia G JG   Arellano Gabriel G   Saadi Celina Ben CB   Baker Timothy R TR   Phillips Oliver L OL   Honorio Coronado Eurídice N EN   Ruokolainen Kalle K   García-Villacorta Roosevelt R   Roucoux Katherine H KH   Guèze Maximilien M   Sandoval Elvis Valderrama EV   Fine Paul V A PVA   Amasifuen Guerra Carlos A CA   Gomez Ricardo Zarate RZ   Stevenson Diaz Pablo R PR   Monteagudo-Mendoza Abel A   Martinez Rodolfo Vasquez RV   Socolar Jacob B JB   Disney Mathias M   Del Aguila Pasquel Jhon J   Llampazo Gerardo Flores GF   Arenas Jim Vega JV   Huaymacari José Reyna JR   Grandez Rios Julio M JM   Macía Manuel J MJ  

Ecology letters 20231218 1


Dominance of neotropical tree communities by a few species is widely documented, but dominant trees show a variety of distributional patterns still poorly understood. Here, we used 503 forest inventory plots (93,719 individuals ≥2.5 cm diameter, 2609 species) to explore the relationships between local abundance, regional frequency and spatial aggregation of dominant species in four main habitat types in western Amazonia. Although the abundance-occupancy relationship is positive for the full data  ...[more]

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