Revealing floristic variation and map uncertainties for different plant groups in western Amazonia

Zuquim, Gabriela; Tuomisto, Hanna; Chaves, Pablo Pérez; Vilanova, Emilio; Moulatlet, Gabriel M.; Ruokolainen, Kalle; doninck, Jasper Van; Balslev, Henrik

doi:10.1111/jvs.13081

Cited by 8 publications

(9 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The occurrence of C. rubicundus overlaps with these floodplains and the disjunct distribution of this species can be explained by these intense tectonic and sedimentological activities. novaesi is consistent with geological and floristic discontinuities identified in the Juruá river basin (Higgins et al, 2011, Zuquim et al, 2021.…”

Section: Figure 1 Continuous Phylogeographic Reconstruction Of the Di...supporting

confidence: 84%

“…This ancient Juruá River may have been responsible for speciation, with C. amuna and C. calvus diverging around 0.3 Mya due to geographic isolation on opposite sides of the river. In addition, this region is considered the boundary between the Miocene Pebas (Solimões) Formation, in the west, and the late Miocene-Pleistocene Içá Formation, to the east (Higgins et al, 2011), which is associated with the floristic turnovers zone identified in the Juruá river basin (Zuquim et al, 2021). However, the recent displacement of the Juruá River towards the Jutaí River basin (<0.1 Mya; see Ruokolainen et al, 2020;Rossetti et al, 2021) resulted in the isolation of C. calvus populations from the Jutaí River and the Mamirauá floodplains, and also may have promoted gene flow between C. amuna and C.…”

Section: The Evolutionary History Of Cacajaomentioning

confidence: 99%

See 1 more Smart Citation

The impact of Quaternary Amazonian river dynamics on patterns and process of diversification in uakari monkeys (genusCacajao)

Silva,

Luna,

Batista

et al. 2023

Preprint

View full text Add to dashboard Cite

Aim:Western Amazonia is a region that underwent several landscape changes during the Quaternary. While Riverine Barrier Hypothesis is traditionally used to explain the influence of rivers on speciation, processes such as river rearrangements have been overlooked to explain the geographic distribution and evolutionary history of Amazonia biota. Here we test how river rearrangements in western Amazonia influenced the evolutionary history of uakari monkeys, a primate group mostly associated with seasonal flooded forests in western Amazonia.Location:Western Amazonia.Taxon:The uakari monkey (genusCacajao).Methods:We performed a continuous phylogeographic analysis using 77 cytochrome b sequences and used digital elevation models to identify the role of landscape and riverscape characteristics in the geographic distribution ofCacajao. Finally, we used genome-wide SNPs variation (ddRADseq) to investigate population structure, gene flow and demographic history in threeCacajaospecies that were impacted by river rearrangements.Results:Our continuous phylogeographical reconstruction points that the ancestralCacajaolineage occupied the flooded forests of the Solimoes River at ~1.7 Mya, and descendant lineages dispersed throughout western Amazonia more recently. We identified gene flow among both black and bald-headed uakari populations, even across rivers considered barriers (e.g., the Negro River). Landscape analysis showed that river rearrangements influenced the geographic distribution and population structure inCacajao. The demographic analysis indicates thatC. calvus,C. amuna, andC. rubicunduswent through a population decline in the last 70 Kya and have a low effective population size.Main conclusion:Our results support that the river rearrangements have shaped the geographic distribution and divergence of recently divergedCacajaolineages. Landscape and riverscape changes, along with retractions of the flooded forests, isolated someCacajaopopulations in floodplain areas. Our study also suggests that these events led to the recent population decline in species with a restricted geographic distribution.

show abstract

Section: Figure 1 Continuous Phylogeographic Reconstruction Of the Di...supporting

confidence: 84%

Section: The Evolutionary History Of Cacajaomentioning

confidence: 99%

The impact of Quaternary Amazonian river dynamics on patterns and process of diversification in uakari monkeys (genusCacajao)

Silva,

Luna,

Batista

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The complete species turnover occurred within the same vegetation type (evergreen montane forest), as classified in the ecosystem map of Ecuador (Galeas and Guevara 2012). Vegetation classification usually separates floristic units based on species composition and endemism (Borchsenius 1997) and species turnover is more expected between vegetation types (Dambros et al 2020) than within vegetation types (Zuquim et al 2021). Although we did not provide a formal test for a possible mechanistic explanation for the dissimilar fern and lycophyte composition, we cannot discard the hypothesis that specific site conditions were determinant (Kessler and Lehnert 2009), as the 1558-m plot was located in a less exposed area with higher canopy and tree density, while the 2018-m plot was located on a mountain ridge with lower-canopy vegetation, more exposed to weather conditions.…”

Section: Discussionmentioning

confidence: 99%

Floristic and functional diversity of ferns and lycophytes at three elevational zones in the eastern slopes of the northern Andes, Ecuador

Riaño

Moulatlet

2022

Acta Amaz.

Self Cite

View full text Add to dashboard Cite

The northeastern slope of the Andes is an area of high diversity of ferns and lycophytes. In this study we assessed the diversity patterns of ferns and lycophytes in ten 250 m x 2 m plots installed at three elevational zones, from 418 to 3447 m.a.s.l., in the Napo province of Ecuador. Floristic diversity was measured using Hill numbers and by partitioning species diversity. Three functional diversity indices were calculated from a set of five leaf traits and weighted by species abundance: functional richness (FRic), evenness (FEve) and divergence (FDiv). To disentangle functional diversity from species richness, the standardized effect size (SES) of each index was also calculated. We recorded 148 species, Polypodiaceae and Dryopteridaceae being the most representative families. Species richness continuously decreased with elevation. Floristic composition was highly heterogeneous among elevation zones, with total species turnover found between 1500 and 2000 m.a.s.l. SES-FDiv and SES-FEve were higher than the null expectation for plots at mid-elevations, suggesting that deterministic mechanisms, such as biotic or abiotic filters, could explain assemblage composition at these sites. However, SES-FEve, SES-FRic and SES-FDiv did not differ from the null expectations at low and high elevation sites, suggesting the predominance of a stochastic process. By combining floristic and functional diversity, we were able to infer the observed community patterns with the resource-use strategies of fern and lycophytes in a mountain area, an approach that can be used to understand how assemblages might react to changing environmental conditions.

show abstract

“…However, the strength of species–environment relationships varies widely among taxa (Cámara‐Leret et al, 2017). Moreover, environmental determinism in palms is typically weaker than in other plant groups that are less used by humans, including melastomes, ferns and gingers (Tuomisto et al, 2016; Zuquim et al, 2021). Relative to many other plant groups, palms are disproportionately abundant in lowland Amazonia (Muscarella et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The legacy of human use in Amazonian palm communities along environmental and accessibility gradients

Zuquim

Jones

Ovaskainen

et al. 2023

Global Ecol Biogeogr

Self Cite

View full text Add to dashboard Cite

Aim: Palms are iconic and dominant elements of neotropical forests. In the Amazon region, palms have been used and managed by humans for food, material, medicine and other purposes for millennia. It is, however, debated to what extent the structure of modern palm communities reflects long-term human modification. Here, we investigate the complex interplay of ecological and societal factors that influence the distributions of both human-used and non-used palms in western Amazonia.Location: Amazonia. Time period: Present. Major taxa studied: Palms (Arecaceae).Methods: We used Bayesian hierarchical joint species distribution models to predict the distributions and environmental niche dimensions of 78 western Amazonian species, and to explore their relationships with their diversity of human uses and with specific uses (food, construction and medicine). The models were parameterized with a comprehensive set of field-and satellite-derived environmental predictors. Results:Our results suggest that a combination of ecological and anthropogenic factors drive the present-day distributions of Amazonian palms. The modelled ecological niches of the species revealed use-related species-sorting along soil, climatic, accessibility and drainage gradients. We found peaks in the proportions of useful palms and their diversity of uses in fertile soils, close to rivers, and on floodplains. These are habitats favourable for human settlement, although they harbour naturally restricted palm species pools. We also found a negative correlation between predicted palm species richness and number of human uses across western Amazonia.Main conclusions: Soil characteristics, accessibility, and species pool size all contribute to defining palm-human relationships. At the basin scale, the signature of human use on palm communities was predicted to be stronger in the species-poor southwest than in central-western Amazonia. Overall, we conclude that environmental conditions have influenced modern Amazonian palm distributions both directly and indirectly, by regulating human settlement patterns and natural resource use over extended time periods.

show abstract

Revealing floristic variation and map uncertainties for different plant groups in western Amazonia

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri butio n-NonCo mmerc ial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

Cited by 8 publications

References 50 publications

The impact of Quaternary Amazonian river dynamics on patterns and process of diversification in uakari monkeys (genusCacajao)

The impact of Quaternary Amazonian river dynamics on patterns and process of diversification in uakari monkeys (genusCacajao)

Floristic and functional diversity of ferns and lycophytes at three elevational zones in the eastern slopes of the northern Andes, Ecuador

The legacy of human use in Amazonian palm communities along environmental and accessibility gradients

Contact Info

Product

Resources

About