Community structure and tree diversity in a subtropical forest in southern Brazil

Bordin, Kauane Maiara; Ferreira, Letícia Daiana; Rosina, Adriano; Malacarne, Marciana; Zanotelli, Patricia; Adami, Samuel Fernando; Vendruscolo, Giovana Secretti

doi:10.1590/1676-0611-bn-2018-0606

Cited by 5 publications

(4 citation statements)

References 45 publications

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“…Many resemblances in species composition exist when compared with other studies in nearby areas of Seasonal Semideciduous Forest [70,71,74] and transitional areas between Semideciduous and Mixed Forests [72,73,78] (Appendix 2); however, there are differences in the structure of the communities, mainly in the species that present the highest abundances and IV, probably due to the different conditions of each area, whether related to the environment or anthropic activities.…”

Section: Floristics and Phytosociologymentioning

confidence: 75%

“…Souza et al (2019) [72] and Adenesky-Filho et al (2017) [73] found as predominant families Fabaceae, Myrtaceae, Lauraceae, Euphorbiaceae and Meliaceae, and Estevan et al (2016) [74] found Fabaceae, Meliaceae, Myrtaceae and Lauraceae. Fabaceae was also the family with the highest species richness and stood out in most surveys done in Seasonal Semideciduous Forests [36,[75][76][77][78] due to the capacity of nitrogen fixation of many species, which favors the regeneration in soils with nutrient deficiency, or that underwent some disturbance [79,80].…”

Section: Floristics and Phytosociologymentioning

confidence: 99%

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Relation between environmental factors and structure of Atlantic Forest fragments

et al. 2023

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Forest fragmentation affects the structure and interactions of plant communities on several levels and is considered one of the causes of the extinction of species. This study aimed to verify if size, isolation, altitude and soil attributes influence species richness, basal area, abundance and species composition in Atlantic Forest fragments. We sampled shrubby-arboreal individuals and soil of ten fragments, and measured area, altitude and isolation. To verify the effects of the environment on abundance, species richness and basal area, we utilized generalized linear mixed models; to detect patterns in species abundance distribution concerning altitude, we constructed ordination histograms; and to determine the associations between environment and species composition, we performed a canonical correspondence analysis. A group of species was related to soils with higher Base Saturation, Organic Matter, Phosphorus, Silt and pH; another group had more relationship to soil variables such as Aluminium, Iron, Clay and Altitude, and a third group was related to Sulfur, Zinc and Boron. Some species occurred only in smaller and less elevated fragments, and others were exclusive of larger and more elevated fragments. The size and isolation of fragments did not explain species richness. The interaction between soil texture and nutrients causes changes in the composition of the community. Species richness, abundance, basal area and density were higher in more fertile soils. The basal area of the species increases with fragment size, altitude and more fertile soils.

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Section: Floristics and Phytosociologymentioning

confidence: 75%

Section: Floristics and Phytosociologymentioning

confidence: 99%

Relation between environmental factors and structure of Atlantic Forest fragments

et al. 2023

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“…Details of the floristics and a structural description of the forest can be found in Bordin et al. ().…”

Section: Resultsmentioning

confidence: 99%

“…The families which had the largest number of species were the same in both censuses: Fabaceae (11), Lauraceae and Rutaceae (5), Salicaceae and Sapindaceae (4). Details of the floristics and a structural description of the forest can be found in Bordin et al (2019).…”

Section: Re Sultsmentioning

confidence: 99%

Drivers of subtropical forest dynamics: The role of functional traits, forest structure and soil variables

Bordin

Müller

2019

J Vegetation Science

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Question How do biotic forest conditions, in terms of plant functional traits and tree basal area, and soil variables influence old‐growth forest dynamics? Location A subtropical old‐growth forest in Southern Brazil. Methods Forest inventories were conducted in 1999 and 2017, in 24 permanent plots of 500 m2. All trees with a circumference at breast height of ≥ 30 cm were measured, identified to the species level, and tagged. We fitted linear models to evaluate the effect of the biotic variables of initial forest communities (tree basal area, trait community‐weighted mean [CWM] and both species and functional diversity metrics) and of soil variables on forest dynamics. These models included biomass dynamics (annual rate of biomass increment and mortality) and demographic rates (recruitment and mortality rates). Furthermore, linear models were used to evaluate the effect of tree survival, recruitment and mortality and biomass increment on the net biomass change. Results We observed a positive effect of species diversity and a negative effect of CWM leaf phosphorus content on the biomass increment. Biomass loss was positively related to basal area and negatively related to the CWM of leaf nitrogen content. Overall, net biomass change was negatively influenced by biomass loss due to mortality. Recruitment rates were negatively affected by soil potassium content and were positively affected by soil pH and functional evenness of the community. Mortality rates were positively predicted by soil clay content and negatively predicted by species diversity. Conclusions Community functional traits, basal area and soil variables predicted growth, mortality and recruitment dynamics of this subtropical old‐growth forest. This work provides important information about the biomass and demographic dynamics of subtropical forests, showing that initial community characteristics influence the gain and loss of biomass and individuals over a period of almost two decades.

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Effects of urban ecosystem under the diversity and structure of two forest ecotones in Maranhão state

Santos,

Oda-Souza,

de Almeida

et al. 2023

Urban Ecosyst

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Forest ecotones are oristically rich but anthropogenic disturbances can differentiate their vegetation structure. This study evaluated the understory diversity of urban and nonurban forests in Maranhão. It tested the hypotheses that the understory of the nonurban forest has greater diversity and richness and that the spatial distribution of these variables in the understory of the urban forest has weak spatial dependence. The study was conducted in the municipalities of São Luís (urban area) and São José de Ribamar (nonurban area). Thirty plots (25m²) were demarcated and the woody individuals up to 2 m tall were measured. All phytosociological parameters were calculated. The differences in richness, density, and diversity were analyzed between the areas with the Mann-Whitney test, non-metric multidimensional scaling, and Hutcheson t-test. To visualize the variation in richness and diversity of the vegetation, ordinary kriging was used. There was a difference in the oristic composition and density of each species in the two areas; the richness and diversity were signi cantly greater in the nonurban area. The species with the highest IVs were Faramea nitida, Myrcia amazonica, and Ephedranthus pisocarpus in the nonurban forest and Protium heptaphyllum, Randia armata, and Moquilea tomentosa in the urban forest. Both understories had high diversity compared to other Amazonian regions. However, weak spatial dependence was found in the urban area, suggesting high anthropogenic interference in the environment. It is noteworthy that the areas represent a parcel of original ecotone vegetation in Maranhão and effective actions are needed to restore and conserve its diversity.

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Community structure and tree diversity in a subtropical forest in southern Brazil

Cited by 5 publications

References 45 publications

Relation between environmental factors and structure of Atlantic Forest fragments

Relation between environmental factors and structure of Atlantic Forest fragments

Drivers of subtropical forest dynamics: The role of functional traits, forest structure and soil variables

Effects of urban ecosystem under the diversity and structure of two forest ecotones in Maranhão state

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