Estrutura populacional de Albizia niopoides (Benth.) Burkart e Mimosa hexandra Micheli (Fabaceae) em Chaco brasileiro

The distributions of species of Fabaceae are strongly related to the soil. Their presence can alter restrictive conditions and favour the establishment of other species. However, it is still not known how the relationship between species of Fabaceae and edaphic factors interact in structuring woody Chaco vegetation. In this context, we aimed to test the hypothesis that restrictive edaphic conditions can explain the difference in floristic patterns of two types of vegetation through their species representativeness of Fabaceae. We analysed floristic consistency between wooded and forested Chaco to address how spatial and environment components might explain differences between them along with the effects of the interaction between Fabaceae and the soil. We observed that the association between environmental and spatial variables was more important than any individual factor in explaining the structuring of the communities. Both the percentage of species of Fabaceae present and the soil influence the structure of the two types of vegetation. Species of Fabaceae have greater potential as indicators in the wooded Chaco. Therefore, we suggest the interaction between soil types and species of Fabaceae plays a role during the structuring of the communities through the establishment of these species in more restrictive soils.

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Species representativeness of Fabaceae in restrictive soils explains the difference in structure of two types of Chaco vegetation

Baptista

Assunção

Bueno

et al. 2020

Acta Bot. Bras.

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Vegetation dynamics and precipitation sensitivity in three regions of northern pantanal of Mato Grosso

Moraes

Machado

Biudes

et al. 2021

Rev. Bras. Ciênc. Ambient.

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The wet areas of the Pantanal provide important services such as water and carbon storage, improved water quality, and climate regulation. Analysis and monitoring of vegetated land and precipitation on a regional scale using remote sensing data can provide important information for the preservation of the landscape and biodiversity of the region. Thus, the purpose was to analyze characteristics of the green cycle of the vegetated surface and to what extent the vegetated surface responds to the variability of precipitation in the Pantanal. The areas include the regions of Cáceres (CAC), Poconé (POC), and Barão de Melgaço (BAM) in Mato Grosso. Time series of accumulated precipitation (PPT) and NDVI (Normalized Difference Vegetation Index) were used for the period from 2000 to 2016, obtained on NASA's Giovanni platform (National Aeronautics and Space Administration). The analysis of the wavelet transform was applied for NDVI data and there was cross-correlation analysis for PPT and NDVI data. The results showed that the highest correlation between PPT and NDVI was positive with a 1-month lag, but was significant with a lag of up to 3 months. The wavelet analyses showed that the largest wavelet powers occurred at the frequency between 0.5 and 1.3 years, i.e., the NDVI series presented the main variances on the approximately annual scale, indicating that these characteristics are important aspects of local phenology variability, such as cumulative green throughout the year and generalized senescence.

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Estrutura populacional de Albizia niopoides (Benth.) Burkart e Mimosa hexandra Micheli (Fabaceae) em Chaco brasileiro

Cited by 2 publications

References 17 publications

Species representativeness of Fabaceae in restrictive soils explains the difference in structure of two types of Chaco vegetation

Species representativeness of Fabaceae in restrictive soils explains the difference in structure of two types of Chaco vegetation

Vegetation dynamics and precipitation sensitivity in three regions of northern pantanal of Mato Grosso

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