Structure and diversity of restingas along a flood gradient in southeastern Brazil

Magnago, Luiz Fernando Silva; Martins, Sebastião Venâncio; Schaefer, Carlos Ernesto Gonçalves Reynaud; Neri, Andreza Viana

doi:10.1590/s0102-33062013000400020

Cited by 19 publications

(17 citation statements)

References 36 publications

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“…The WT was the most important driver of the restinga communities' taxonomic composition (table 1). The sensitivity to WT was also observed in plant communities from the Amazonian basin (Schietti et al, 2014) and was previously reported the changing of restinga forests structure and diversity along flooding gradient (Magnago, Martins, Schaefer, & Neri, 2013).…”

Section: Discussionsupporting

confidence: 65%

Assessing trait driver theory along abiotic gradients in tropical plant communities

Lourenço

Newman

Milanez

et al. 2020

Preprint

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1.Despite the many studies using trait-based approaches to assess the impact of environmental gradients in forest trait composition, the relative roles of (i) intraspecific variation in community assembly and (ii) microclimatic or fine scale abiotic variation in shaping local trait diversity remain poorly understood. To advance their understanding we tested several assumptions and predictions of trait driver theory (TDT). We quantified the shape of trait distributions related to tree carbon, nutrient economics and stem hydraulics across a small-scale but steep gradient of soil water availability. 2 2. We utilized a unique and steep environmental gradient in the coastal Brazilian Atlantic forest (restinga) communities that spans a very short distance (207 ±60 meters). We collected leaf and wood samples of tree species across 42 patches (or plots) of restinga forest.Furthermore, to detect if species directionally shift in niche space, we analyzed species composition in multidimensional hypervolume space. 3. Despite short geographic distances, we observed large shifts in species replacement and intraspecific variation reflected by a directional shift in plant function. Consistent with TDT, we observe (i) trait distributions that are skewed in directions consistent with a forest responding to recent hotter and drier; (ii) peaked trait distributions, indicating strong functional convergence; and (iii) conditions decreasing means and variances of several leaf carbon and nutrient economic traits as well as stem hydraulic traits. 4. Synthesis. Observed species replacements along the water table gradient and interspecific measures of functional diversity (community kurtosis and skewness) are consistent with strong phenotype/environmental matching of plant carbon, nutrient, and hydraulic strategies.We observe environmental filtering in both extremities of the gradient, selecting for acquisitive (wet) to conservative (dry) setup of traits. Similarly, species that span the entire water availability gradient are characterized by directional intraspecific shifts in multi-trait space that mirror interspecific shifts. Strong environmental gradients across short spatial scales provide unique systems to accurately assess assembly processes and address long-held assumptions and timely hypothesis predicted by trait driver theory. 1 Supplementary MaterialAdditional Supporting Information may be found in the online version of this article:Appendix S1. Trait prediction Appendix S2. PCA loadings and species shifting in two-dimensional centroid space Appendix S3. Shapes of the traits distributionCoding. Pred_trait.R function and text file script for the trait predictions

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Section: Discussionsupporting

confidence: 65%

Assessing trait driver theory along abiotic gradients in tropical plant communities

Lourenço

Newman

Milanez

et al. 2020

Preprint

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“…Moreover, as salinity was recently reported to distinguish restinga forests from others environmentally marginal habitats of Atlantic Forest (Neves et al 2017), we may conclude that Na plays a key role in the system functioning, as has been observed in other topical forests (Kaspari et al 2009). those reported in earlier studies of restinga plant communities (Magnago et al 2013, Rodrigues et al 2013, Melo Júnior and Torres Boeger 2015. Al solubility and availability is known to be related to the increase of soil acidity (Lambers et al 2008); and we found that Al availability was higher toward the wet end of the flooding gradient (Appendix S1.…”

Section: Variable Selection and Structural Equation Modelingsupporting

confidence: 84%

Drivers of plant traits and forest functional composition in coastal plant communities of the Atlantic Forest

Lourenço

Newman

Ventura

et al. 2019

Preprint

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The severe deforestation of Brazil's Atlantic Forest and increasing effects of climate change underscore the need to understand how tree species respond to climate and soil drivers. We studied 42 plots of coastal restinga forest, which is highly diverse and spans strong environmental gradients. We determined the forest physiognomy and functional composition, which are physical properties of a community that respond to climate and soil properties, to elucidate which factors drive community-level traits. To identify the most important environmental drivers of coastal Atlantic forest functional composition, we performed a forest inventory of all plants of diameter 5 cm and above. We collected wood samples and leaves from ~85% of the most abundant plant species and estimated height, aboveground biomass (AGB), and Lourenço, Jr. et al. Plant trait drivers in flooded forests 2 basal area of individual plants, and the community-weighted specific leaf area (SLA). In addition to plant traits, we measured water table depth and 25 physicochemical soil parameters. We then parameterized several models for different hypotheses relating the roles of nutrients and soil to tropical forest diversity and functioning, as represented by plant traits. Hypotheses were formalized via generalized additive models and piecewise structural equation models. Water table depth, soil coarseness, potential acidity, sodium saturation index (SSI) and aluminum concentration were all components of the best models for AGB, height, basal area, and trait composition. Among the 25 environmental parameters measured, those related to water availability (water table depth and coarse sand), followed by potential acidity, SSI, and aluminum consistently emerged as the most important drivers of forest physiognomy and functional composition. Increases in water table depth, coarse sand, and soil concentration of aluminum negatively impacted all the measured functional traits, whereas SSI had a positive effect on AGB and plant height. These results suggest that sodium is not merely tolerated by Atlantic Forest restinga plant communities, but is important to their structure and functioning. Presence of aluminum in the soil had a complex relationship to overall basal area, possibly mediated by soil organic matter.

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“…A diversidade obtida na área estudada da Restinga da Marambaia é alta (H'=3,49 e J=0,81), quando comparada a outras formações de Restinga ao longo do litoral fluminense, situando-se na faixa de diversidade das Florestas de Restinga (PEREIRA; PEREIRA, 2001;MAGNAGO et al, 2013). No entanto, a diferença entre os valores de diversidade reflete-se pelo tipo de vegetação estudada, pela metodologia de amostragem e também pelo seu tamanho amostral.…”

Section: Dias H M; Araujo D S D 1134unclassified

“…Na área estudada, a diversidade foi refletida pelo tamanho amostral empregado e pela riqueza de espécies, além de também ter sido realizado em vegetação com dossel fechado e contínuo. Cabe destacar também que diferenças em valores de diversidades entre comunidades de restinga podem ser relacionados com gradientes ambientais, com valores mais baixos de diversidade em áreas inundadas (MAGNAGO et al, 2013).…”

Section: Dias H M; Araujo D S D 1134unclassified

Estrutura Do Estrato Lenhoso De Uma Comunidade Arbustiva Fechada Sobre Cordão Arenoso Na Restinga Da Marambaia - Rj

Dias¹,

Araújo²

2017

Ciênc. Florest.

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RESUMOO presente estudo teve por objetivo descrever florística e estruturalmente o estrato lenhoso de uma comunidade arbustiva fechada sobre cordão arenoso na Restinga da Marambaia. Para isso, utilizou-se metodologia de A similaridade com mesmo tipo de vegetação em Marica -RJ foi C S =0,37 e C N =0,15. Constatou-se similaridade relativamente alta (C S =0,62) entre esta e uma floresta de duna na Marambaia, indicando forte ligação florística entre elas. A comunidade analisada foi classificada como arbustiva fechada de Myrtaceae por atender a critérios florísticos, fisionômicos e estruturais. Embora existam semelhanças em relação à riqueza e VI de espécies de Myrtaceae entre Marambaia e Maricá, a similaridade entre ambas formações é baixa, em termos qualitativos e quantitativos, demonstrando uma heterogeneidade ao longo do litoral. Isto dificulta a ampla utilização da classificação nomenclatural das comunidades de restinga. Palavras-chave: diversidade; fitossociologia; riqueza. ABSTRACTThe present study described the floristic and structure of the woody layer in closed shrubby formation on a sandy coastal plain at Restinga da Marambaia and compare this vegetation to other physiognomically similar plant communities. Using the line intercept method, a total of 1170m were sampled, resulting in 1938 woody plants (dbh ≥ 0.5cm), 73 species, 30 families. The families with highest importance values were Myrtaceae (21%), Nyctaginaceae (7.2%), Malvaceae (7.1%). Myrtaceae had the most species (15) and also the greatest number of individuals (379). The species with the greatest importance values were Guapiraopposita, Maytenusobtusifolia, Pavoniaalnifolia, Aspidospermaparvifolium, Eugenia copacabanensis, Myrrhiniumatropurpureum, Manilkarasubsericea, Ouratea cuspidate, Erythroxylumovalifolium. Diversity index H´= 3.49, J´= 0.81. Similarity between this community and formation in Maricá (C S = 0.37, C N = 0.15). This closed shrubby formation was classified as Myrtaceae thicket based on floristic, physiognomic, structural parameters. Although this community and that of Maricá are similar in terms of physiognomy and Myrtaceae species richness and importance, the similarity value is low, both quantitatively and qualitatively terms, revealing a great degree of heterogeneity between plant communities along the coast. This has created a certain amount of difficulty in placing plant communities within existing classification systems.

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Structure and diversity of restingas along a flood gradient in southeastern Brazil

Cited by 19 publications

References 36 publications

Assessing trait driver theory along abiotic gradients in tropical plant communities

Assessing trait driver theory along abiotic gradients in tropical plant communities

Drivers of plant traits and forest functional composition in coastal plant communities of the Atlantic Forest

Estrutura Do Estrato Lenhoso De Uma Comunidade Arbustiva Fechada Sobre Cordão Arenoso Na Restinga Da Marambaia - Rj

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