Composição florística e estrutura da comunidade arbórea na transição da Floresta Ombrófila Densa das Terras Baixas - Floresta Ombrófila Densa Submontana do Núcleo Picinguaba/PESM, Ubatuba, sudeste do Brasil

Prata, Eduardo Magalhães Borges; Assis, Marco Antônio; Joly, Carlos Alfredo

doi:10.1590/s1676-06032011000200029

Cited by 15 publications

(12 citation statements)

References 19 publications

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“…(Germano-Filho 1999), where we can find typical Montane tropical forests (Veloso et al 1991). Even though B. australis can be found both on higher and lower slopes (Oliveira-Filho and Fontes 2000), we observed that the highest estimated abundances (>10 indiv.ha À1 ) are on the upper slopes (e.g., Arzolla 2002;Leite and Rodrigues 2008;Padgurschi et al 2011;Pereira 2011;Sanchez et al 2013), while the lowest densities are recorded on the lower ones (e.g., Moreno et al 2003;Campos et al 2011;Gomes et al 2011;Prata et al 2011;Sanchez et al 2013), with rare exceptions (e.g., Gomes et al 2011;Ramos et al 2011). For this reason, we believe that the conditions found on the higher slopes are more favorable to the spreading of B. australis populations than the conditions found on the lower slopes, which would affect the species' genetic diversity.…”

Section: Introductioncontrasting

confidence: 51%

Elevation as a barrier: genetic structure for an Atlantic rain forest tree (Bathysa australis) in the Serra do Mar mountain range, SE Brazil

Reis

Ciampi‐Guillardi

Bajay

et al. 2015

Ecology and Evolution

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Distance and discrete geographic barriers play a role in isolating populations, as seed and pollen dispersal become limited. Nearby populations without any geographic barrier between them may also suffer from ecological isolation driven by habitat heterogeneity, which may promote divergence by local adaptation and drift. Likewise, elevation gradients may influence the genetic structure and diversity of populations, particularly those marginally distributed. Bathysa australis (Rubiaceae) is a widespread tree along the elevation gradient of the Serra do Mar, SE Brazil. This self-compatible species is pollinated by bees and wasps and has autochoric seeds, suggesting restricted gene dispersal. We investigated the distribution of genetic diversity in six B. australis populations at two extreme sites along an elevation gradient: a lowland site (80–216 m) and an upland site (1010–1100 m.a.s.l.). Nine microsatellite loci were used to test for genetic structure and to verify differences in genetic diversity between sites. We found a marked genetic structure on a scale as small as 6 km (FST = 0.21), and two distinct clusters were identified, each corresponding to a site. Although B. australis is continuously distributed along the elevation gradient, we have not observed a gene flow between the extreme populations. This might be related to B. australis biological features and creates a potential scenario for adaptation to the different conditions imposed by the elevation gradient. We failed to find an isolation-by-distance pattern; although on the fine scale, all populations showed spatial autocorrelation until ∼10-20 m. Elevation difference was a relevant factor though, but we need further sampling effort to check its correlation with genetic distance. The lowland populations had a higher allelic richness and showed higher rare allele counts than the upland ones. The upland site may be more selective, eliminating rare alleles, as we did not find any evidence for bottleneck.

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Section: Introductioncontrasting

confidence: 51%

Elevation as a barrier: genetic structure for an Atlantic rain forest tree (Bathysa australis) in the Serra do Mar mountain range, SE Brazil

Reis

Ciampi‐Guillardi

Bajay

et al. 2015

Ecology and Evolution

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“…Hyperdominance is also likely to occur in other diverse tropical forests (Bastin et al 2015) such as the Brazilian Atlantic rain forest (hereafter Atlantic rain forest), a biome that harbors approximately 13,708 angiosperm species, and is the fifth richest biodiversity hotspot in the world, with 49 percent plant endemism (Stehmann et al 2009). Floristic surveys consistently show the dominance of Myrtaceae and Arecaceae (palms) species in this ecosystem (Oliveira-Filho & Fontes 2000, Zipparro et al 2005, Joly et al 2012, Giaretta et al 2013, the latter being represented mainly by the palm-heart tree Euterpe edulis, with up to 300 individuals per hectare in undisturbed areas and the highest abundance of any other tree species (Guilherme et al 2004, Prata et al 2011. Both families are animal-dispersed and important food resources for frugivores (Galetti et al 1999, Guix et al 2001, Gressler et al 2006.…”

Section: Resource Availability For Frugivores Is Critical For Ecosystemmentioning

confidence: 82%

“…, Prata et al . ). Both families are animal‐dispersed and important food resources for frugivores (Galetti et al .…”

mentioning

confidence: 97%

Hyperdominance in fruit production in the Brazilian Atlantic rain forest: the functional role of plants in sustaining frugivores

2016

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The availability of fruits is critical for tropical forests, where the majority of plant species rely upon animal vectors for seed dispersal. However, we do not know how fruit production is temporally distributed over species and families. Two plant families are particularly important in floristic inventories of Atlantic rain forests: Arecaceae, a few species of which are highly abundant; and Myrtaceae, which is abundant and displays outstanding species diversity. In this context, we asked whether hyperdominance occurs in fruit production in the Atlantic rain forest, and whether it occurs in the abundant species of Arecaceae and Myrtaceae. We investigated whether the temporal fruit production patterns differ between Myrtaceae, Arecaceae, and the plant community as a whole. We also applied a functional dispersion index to assess the temporal fruit diversity over a 2‐yr period, with regard to morphological and phenological traits. We found that the phenomenon of hyperdominance occurs in fruit production: five species accounted for more than half of the pulp biomass. Arecaceae fruit biomass peaked at the end of wet season, overlapping with the community peak; whereas Myrtaceae species fruited throughout the year and were an important resource during periods of food scarcity. Myrtaceae filled more of the fruit morphospace over time because their fruits exhibit a large range of morphologies and phenological strategies. Our results demonstrated the importance of combining phenology and fruit morphology in the evaluation of resource availability, which revealed periods of high fruit diversity that could support a range of frugivore sizes and maintain overall ecosystem functionality.

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“…porophylla ( hereafter meridionalis ). Both species were among the ten most‐abundant species in the study area (Assis et al, ; Campos, Tamashiro, Assis, & Joly, ; Prata, Assis, & Joly, ). They are sub‐canopy species, reaching heights of approximately 10 m, and have branches and leaves with an opposite decussate arrangement.…”

Section: Methodsmentioning

confidence: 98%

Differences in architecture and performance between two sub‐canopy congeneric tropical tree species

Costa

Santos

2020

Biotropica

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We report architectural divergence between two congeneric tropical tree species coexisting in the same stratum which suggests different strategies: reducing selfshading and support costs, or maximizing light foraging. We found species-specific differential performance across light environments, suggesting that architectural differentiation could facilitate the coexistence of species with similar vertical habitat.Abstract in Portuguese is available with online material. K E Y W O R D S allometry, Atlantic forest, Brazil, Coexistence, Coussarea, growth strategies, shade tolerance, tree life history AUTH O R CO NTR I B UTI O N S Costa, R.C. involved in conceptualization, data curation, formal analysis, funding acquisition, investigation, methodology, project administration, visualization, and wrote the original draft and reviewed the manuscript. Santos, F.A.M. involved in conceptualization, funding acquisition, methodology, project administration, resources, supervision, and reviewed the manuscript. E TH I C A L A PPROVA LEthical guidelines do not apply to this study.

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Composição florística e estrutura da comunidade arbórea na transição da Floresta Ombrófila Densa das Terras Baixas - Floresta Ombrófila Densa Submontana do Núcleo Picinguaba/PESM, Ubatuba, sudeste do Brasil

Cited by 15 publications

References 19 publications

Elevation as a barrier: genetic structure for an Atlantic rain forest tree (Bathysa australis) in the Serra do Mar mountain range, SE Brazil

Elevation as a barrier: genetic structure for an Atlantic rain forest tree (Bathysa australis) in the Serra do Mar mountain range, SE Brazil

Hyperdominance in fruit production in the Brazilian Atlantic rain forest: the functional role of plants in sustaining frugivores

Differences in architecture and performance between two sub‐canopy congeneric tropical tree species

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