Biomass and demographic dynamics of the Brazil nut family (Lecythidaceae) in a mature Central Amazon rain forest

Milton, Tamara; Assunção, Paulo Apóstolo Costa Lima; Cabello, Nicolli Bruna; Mori, Scott A.; Oliveira, Alexandre Adalardo de; Souza, Priscila; Vicentini, Alberto; Dick, Christopher W.

doi:10.1016/j.foreco.2022.120058

Cited by 2 publications

(1 citation statement)

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“…It also comprises heterogeneous geologic, edaphic and climatic conditions (Hoorn et al., 2010) and hosts the highest number of tree species of any biogeographic region on Earth (Raven et al., 2020; Ulloa‐Ulloa et al., 2017). Locally, small topographic variation is enough to cause edaphic differences (e.g., physical, chemical and hydrological soil variation) leading to major shifts in tree species composition (Bohlman et al., 2008; Koponen et al., 2004; Marca‐Zevallos et al., 2022; Milton et al., 2022; Phillips et al., 2003; Sabatier et al., 1997; ter Steege et al., 1993). Such high species turnover can make it challenging to understand large‐scale patterns as many tree communities share no species at all.…”

Section: Introductionmentioning

confidence: 99%

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Luize,

Bauman,

ter Steege

et al. 2024

Journal of Biogeography

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AimAmazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types.LocationAmazonia.TaxonAngiosperms (Magnoliids; Monocots; Eudicots).MethodsData for the abundance of 5082 tree species in 1989 plots were combined with a mega‐phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran's eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny.ResultsIn the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white‐sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R2 = 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R2 = 28%). A greater number of lineages were significant indicators of geographic regions than forest types.Main ConclusionNumerous tree lineages, including some ancient ones (>66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long‐standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions.

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Section: Introductionmentioning

confidence: 99%

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Luize,

Bauman,

ter Steege

et al. 2024

Journal of Biogeography

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Macrolobium paulobocae (Leguminosae, Detarioideae), a new species from seasonally inundated black-water floodplain forests in the Brazilian Amazon

et al. 2023

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Macrolobium paulobocae is presented as a new species of the legume subfamily Detarioideae. It is restricted to seasonally flooded igapó forests in the Central Amazon. We provide a description, illustration, photographs, and a distribution map of the new species, as well as a table of comparative morphology with similar, likely phylogenetically related species. The epithet is in honor of Paulo Apóstolo Costa Lima Assunção, or Paulo Boca, a great Amazonian botanist, victim of COVID-19 in January 2021.

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Biomass and demographic dynamics of the Brazil nut family (Lecythidaceae) in a mature Central Amazon rain forest

Cited by 2 publications

References 77 publications

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Macrolobium paulobocae (Leguminosae, Detarioideae), a new species from seasonally inundated black-water floodplain forests in the Brazilian Amazon

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