Pollen-based characterization of montane forest types in north-eastern Brazil

Montade, Vincent; Diogo, Ivan Jeferson Sampaio; Brémond, Laurent; Favier, Charly; Costa, Itayguara Ribeiro da; Ledru, Marie‐Pierre; Paradis, Laure; Martins, Eduardo; Burte, Julien; Silva, Francisco Hilder Magalhães e; Verola, Christiano Franco

doi:10.1016/j.revpalbo.2016.07.003

Cited by 8 publications

(13 citation statements)

References 42 publications

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“…For instance, temperature is the most important climatic variable for Fabaceae, but for other families, such as Myrtaceae and Bignoniaceae it is precipitation (Punyasena, 2008). The forest composition change found when comparing windward and leeward was also observed in the corresponding pollen assemblages of those slopes (Montade et al, 2016). The windward slope is an area which is under the influence of orographic rainfalls and has features of ombrophilous forest as its dominant type of vegetation, as we see an increase of Myrtaceae, Lauraceae and Nyctaginaceae families.…”

Section: Discussionmentioning

confidence: 69%

“…blages of those slopes(Montade et al, 2016). The windward slope is an area which is under the influence of orographic rainfalls and has features of ombrophilous forest as its dominant type of vegetation, as we see an increase of Myrtaceae, Lauraceae and Nyctaginaceae families.…”

mentioning

confidence: 70%

“…Among the sampled species, an increase of pioneer and heliophilous trees is observed, such as Alchornea glandulosa , Pourouma guianensis and Miconia mirabilis (Souza et al, 2006; Pessoa et al, 2012), as well as an increase of species with a narrow geographical distribution, which occurred only in forest formations of high‐altitude mountain ranges, such as Clusia melchiorii and Clusia paralicola (Araujo and Scarano, 2007). The increase in the representation of those taxa in both vegetation and pollen rain (Montade et al, 2016), may be a consequence of the existence of specific environmental conditions on the mountain tops or areas located close to it, such as different soil conditions related to the rocks. Moreover, although rainfall would reach its maximum close to the mountain tops, local environmental conditions induce lower diversity and richness and higher density when compared to forests located a few tens of meters below.…”

Section: Discussionmentioning

confidence: 99%

“…Slope angle could also influence vegetation distribution, because it leads to a gradual removal of dissolved materials from the linear slope and, consequently, to the accumulation of these materials near the creek site. However, it is a relevant factor only at values over 40° (Fernández‐Palacios and Nicolás, 1995; Montade et al, 2016). Nevertheless, the distribution of individuals in a given environment is not only determined by abiotic factors, but may also result from biological interactions such as competition, and mutualismssuch as herbivory, dispersal and pollination (Wisz et al, 2013; Diogo et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Section: Temperature Rainfall and Slope Angle Are The Main Variablmentioning

confidence: 99%

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Effects of topography and climate on Neotropical mountain forests structure in the semiarid region

Diogo

Santos²,

Costa

et al. 2020

Applied Vegetation Science

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Question: We aimed to analyze how the topography, temperature and rainfall influence the floristic distribution in three different topographic areas and their surrounding vegetation. We addressed three main questions: (i) How is the distribution of species among the topographic areas? (ii) Which abiotic variable is driving this distribution? and (iii) What is the difference among the mountain forests and between mountain forests and the Caatinga vegetation? Location: The Maranguape mountain forest were divided into three topographic categories: windward (600-800 m, WMA), leeward (600-800 m, LMA) and top (above 800 m, TMA). We also considered another six areas of mountain forests and four Caatinga areas in Ceará State. Methods: We calculated different structural parameters and the floristic diversity of each category. A Principal Correspondence Analysis was performed to analyze the indirect ordination of forest sites by species abundance. A Canonical Correspondence Analysis was conducted to evaluate which variables were driving species distribution. We used non-metric multidimensional scaling distance and the average linkage method to investigate the similarity among mountain forests and Caatinga. Results: A total of 1,536 individuals belonging to 144 tree species distributed in 44 families and 93 genera were recorded. Myrtaceae, Fabaceae and Rubiaceae were the most species-rich families. Myrcia splendens had the highest importance value followed by Guapira nitida and Mollinedia ovata. The leeward slope showed the highest richness and diversity index, whereas the windward showed the highest density and the top showed the highest basal area. The ordination indicated a greater similarity between TMA and WMA than LMA. Conclusion: Our results suggest that temperature, precipitation and slope angle are the abiotic factors driving species distribution in Maranguape. Those mountains are heavily anthropized and continuously explored, therefore these outcomes will be useful for conservation and restoration purposes in the poorly known semiarid region of Northeast Brazil.

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Section: Discussionmentioning

confidence: 69%

mentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Temperature Rainfall and Slope Angle Are The Main Variablmentioning

confidence: 99%

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Effects of topography and climate on Neotropical mountain forests structure in the semiarid region

Diogo

Santos²,

Costa

et al. 2020

Applied Vegetation Science

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Towards quantifying changes in forest cover in the Araucaria forest-grassland mosaic in southern Brazil

Bermúdez

Theuerkauf

Giesecke

2021

Veget Hist Archaeobot

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Quantitative estimates of past vegetation cover are needed both regionally so human-landscape interactions can be better understood, and globally to evaluate the effects of changing vegetation cover on the climate system. Models reducing the bias in the pollen representation of vegetation cover have been developed in the temperate regions of the northern hemisphere, while experience applying them in other parts of the world is limited. The Araucaria forest-grassland mosaic of southern Brazil is an area where open and forested plant communities exist naturally and have changed their cover over time due to changing climate and human activities. Therefore, this area is of particular interest for such studies. Modern pollen and vegetation comparisons were carried out in two protected areas: Vila Velha State Park in Paraná state and Aparados da Serra National Park in Rio Grande do Sul. Vegetation mapping and analysis focused on Araucaria angustifolia as the characteristic tree of this vegetation type. In the Araucaria forest-grassland mosaic open vegetation and woodland change at a scale of hundreds of metres. These changes are difficult to capture based on pollen proportions in surface samples. While the abundance of Poaceae pollen is not a good indicator of locally open conditions, several pollen taxa can be used as indicators of the local vegetation cover. Pollen vegetation ratios (R-values) compare well between the two study regions, indicating that pollen production of individual species within the large plant families of Poaceae and Asteraceae are similar within the overall region. Araucaria angustifolia pollen is underrepresented with regards to its vegetation cover, while Poaceae are among the highest pollen producers in the region. Diverse woodland species other than A. angustifolia were grouped as one forest taxon and as the species composition of woodlands differed between the two study areas, so did the estimated pollen productivity of this group. It would be rewarding in future investigations to estimate pollen productivity for groups of trees with the same pollen dispersal syndrome. The application of pollen dispersal models designed for closed canopy in the protected areas was challenging. Further model development is required to deal with pollen released at different levels in semi-open vegetation types.

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A quantitative study of modern pollen–vegetation relationships in southern Brazil's Araucaria forest

Cárdenas

Wilson

Schorn

et al. 2019

Review of Palaeobotany and Palynology

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Pollen-based characterization of montane forest types in north-eastern Brazil

Cited by 8 publications

References 42 publications

Effects of topography and climate on Neotropical mountain forests structure in the semiarid region

Effects of topography and climate on Neotropical mountain forests structure in the semiarid region

Towards quantifying changes in forest cover in the Araucaria forest-grassland mosaic in southern Brazil

A quantitative study of modern pollen–vegetation relationships in southern Brazil's Araucaria forest

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