ORCID Profile
0000-0001-6146-1618
Current Organisations
Universidade Estadual de Mato Grosso do Sul
,
Universidade Federal de Minas Gerais
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Publisher: Frontiers Media SA
Date: 17-07-2018
Publisher: Springer Science and Business Media LLC
Date: 23-12-2022
Publisher: FapUNIFESP (SciELO)
Date: 05-2014
Abstract: Large areas in the Pantanal wetland are covered by monodominant formations, e.g. typical landscapes with local names such as “paratudal”, dominated by T. aurea. Studies on structure of these formations generally include only woody strata, consequently the species richness registered is usually low due to the absence of the ‘ground layer’ of herbaceous and others low species. We recorded 13 species, 12 genera and 11 families for the arboreal stratum. Considering arboreal flora without the dominant (T. aurea) in iduals showed great establishment in relation to the flood level between 35 – 45 cm while the in iduals of the dominant species of 30 – 45 cm. The diameter distribution revealed that the population of T. aurea did not show the reverse J curve, the usual pattern for species in constant regeneration, also evidenced in inconstant Licourt quotient, indicating an episodic recruitment that could lead to future changes in structure. In the herbaceous strata we recorded 78 species, included in 62 genera and 27 families. Using plots method we s led 46 species, 40 genera and 22 families, while in line interception we found 65 species distributed in 57 genera and 26 families. The floristic similarity of Sørensen between both methods was 59.4%, with 33 species in common, and the method of line interception was more efficient in detecting richness, with 35% more species found in the same time. According to the methods of plots and line interception applied on the woody stratum, our results gave similar detailed information on the structure of this type of savanna, and in spite of being monodominant it shows high species richness when the herbaceous stratum is taken into account. Plots and line interception methods showed similar results for the woody stratum and high species richness of the herbaceous stratum.
Publisher: Wiley
Date: 05-06-2021
DOI: 10.1111/JBI.14148
Abstract: The centre‐periphery hypothesis (CPH) states that peripheral populations exhibit lower genetic ersity, abundance and size, and higher differentiation compared to central populations, due to a decline in environmental suitability towards range margins. Here, we tested if neutral genetic ersity and functional leaf trait ersity fit the predicted patterns of the CPH. Cerrado, Brazil. Qualea grandiflora (Vochysiaceae) and Annona crassiflora (Annonaceae). Variation in eight functional leaf traits and nine or eight microsatellite loci were analysed in 37 populations (777 in iduals) of Q . grandiflora and 21 populations (397 in iduals) of A . crassiflora . We tested CPH using three distinct centres of species’ range: geographical (centre of species’ geographic occurrence), historical (centre of species’ refugia) and ecological (centre of species’ current suitability areas). Generalised linear regressions were performed between genetic ersity and differentiation, coefficients of variation and means of leaf metamer traits of populations and their distances from each centre. A decrease in allele richness was observed from central towards peripheral populations for ecological (both species) and geographical centres ( Q . grandiflora ). Overall, the results for both species pointed to a decrease in metamer vigour towards marginal populations, pattern consistent with a decrease in environmental suitability towards periphery as predicted by CPH. Besides geographical and ecological centres, leaf traits fitted CPH considering historical centre. Results for leaf traits and genetic ersity of two phylogenetically distant species indicate the consistency of the CPH for Cerrado species. Our results highlight the importance of considering distinct centres and a great number of populations along species’ range to better determinate the processes underlying the distribution of genetic ersity and functional traits. The low genetic ersity and metamer vigour in marginal populations can explain the Cerrado endemism of studied species and suggest that the ongoing climatic changes can be critical for their survival.
No related grants have been discovered for Marcelo Leandro Bueno.