Floristic survey of the Furnas G&amp;ecirc;meas region, Campos Gerais&amp;nbsp;National Park, Paran&amp;aacute; state, southern Brazil

Andrade, Anna Luiza Pereira; Moro, Rosemeri Segecin; Kuniyoshi, Yoshiko Saito; Carmo, Marta Regina Barrotto do

doi:10.15560/13.6.879

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…Particularmente para a região dos Campos Gerais, os dados disponíveis são levantamentos florísticos e estudos ecológicos pontuais (Mioduski & Moro, 2011;Moro et al, 2012;Andrade, Moro, Kuniyoshi & Carmo, 2017). Os trabalhos de estrutura têm apontado diferenças significativas entre fisionomias com a riqueza e a composição distintas em cada comunidade campestre, em função dos gradientes edáficos e topográficos (Moraes et al, 2016;Silva et al, 2016).…”

Section: Introductionunclassified

Estrutura e composição em fisionomias campestres setentrionais do Sul do Brasil

Andrade,

Assis,

Carmo

2023

TerraPlural

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Com objetivo de contribuir para o entendimento das formações campestres no planalto meridional brasileiro, realizou-se um levantamento florístico e estrutural em comunidades na parte norte da região fitogeográfica dos Campos Gerais do Paraná, sob um regime climático de transição entre temperado e subtropical. O estudo foi realizado em três fisionomias encontradas no Parque Estadual do Guartelá (Tibagi, PR) (24º39’10” S e 50º15’25” W), com a alocação de 90 unidades amostrais de 1 m2, distribuídas em 30 parcelas em campo seco (CS), 30 em campo com afloramentos rochosos (CR) e 30 em campo úmido (CU). Foram determinadas 128 espécies pertencentes a 28 famílias, com ocorrência de 66 espécies no CS, 55 no CR e 64 para o CU. Apesar do CS apresentar o maior número de espécies não foram observadas diferenças significativas de riqueza e diversidade entre as três fisionomias. A maior riqueza de espécies foi amostrada em Asteraceae (28 espécies), Poaceae (24), Melastomataceae (13) e Cyperaceae (11), padrão comum em áreas campestres dos Biomas Mata Atlântica e Cerrado. Poucas espécies apresentaram alta frequência e cobertura nas comunidades, especialmente gramíneas, entremeadas a um número alto de espécies de baixa frequência e biomassa. Além disso, observou-se uma marcante zonação da vegetação, ditada pelas variações topo-edáficas, já que a maior similaridade ocorreu entre CS e CR (54,54%) e dissimilaridade entre CR e CU (21,84%). Apesar disso, foram encontradas 10% de espécies comuns a todas as fisionomias, índice superior ao encontrado em estudos na região. Diferenças florísticas e estruturais das comunidades locais e regionais reforçam a necessidade de mais estudos sobre os campos planálticos do Sul do Brasil para sua compreensão mais detalhada, já que sua complexidade é pouco conhecida e a forte pressão antrópica tem reduzido significativamente sua área de ocorrência

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Section: Introductionunclassified

Estrutura e composição em fisionomias campestres setentrionais do Sul do Brasil

Andrade,

Assis,

Carmo

2023

TerraPlural

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“…One of the aspects that attract researchers in search of metabolites with biological properties is the wide diversity of the Brazilian territory, and thus the great diversity of the national flora, since native species are the sources of new bioactive compounds. Campos Gerais is one of these regions, located in the state of Paraná, and has highly diverse vegetation fragments [ 16 ]. Considering the floristic formations, it is a zone where patches of Cerrado occur [ 17 ] in humid tropical and subtropical forests [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

et al. 2022

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Weeds pose a problem, infesting areas and imposing competition and harvesting difficulties in agricultural systems. Studies that provide the use of alternative methods for weed control, in order to minimize negative impacts on the environment, have intensified. Native flora represents a source of unexplored metabolites with multiple applications, such as bioherbicides. Therefore, we aimed to carry out a preliminary phytochemical analysis of crude extracts and fractions of Miconia auricoma and M. ligustroides and to evaluate these and the isolated metabolites phytotoxicity on the growth of the target species. The growth bioassays were conducted with Petri dishes with lettuce, morning glory, and sourgrass seeds incubated in germination chambers. Phytochemical analysis revealed the presence of flavonoids, isolated myricetin, and a mixture of quercetin and myricetin. The results showed that seedling growth was affected in a dose-dependent manner, with the root most affected and the seedlings of the lettuce, morning glory, and sourgrass as the most sensitive species, respectively. Chloroform fractions and myricetin were the most inhibitory bioassays evaluated. The seedlings showed structural changes, such as yellowing, nonexpanded cotyledons, and less branched roots. These results indicate the phytotoxic potential of Miconia allelochemicals, since there was the appearance of abnormal seedlings and growth reduction.

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“…11,12 Nevertheless, there are few data about spontaneous recovery in abandoned arable land and after fires. [13][14][15][16] Fires could directly affect plant community structure in grasslands interfering with the growing, survival and reproduction of plants and their seed banks. 16 The secondary vegetal succession starts when resilient species besides other dispersers recolonize the disturbed area.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous recovery and the structure of plant community after agriculture use and fire in grasslands in the Vila Velha state park, South Brazil

Moro¹,

Dalazoana²,

Novochadlo³

2018

BIJ

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This study compares the plant structure of native and passive regenerated grassland areas in the Vila Velha State Park, southern Brazil. We analyzed four data set and observed that: (i) areas former submitted both to agricultural activity and fire showed lower species diversity (mainly Poaceae) and three abundant taxa (the ruderale grasses Eragrostis airoides, Andropogon bicornis, and Eustachys distichophylla); (ii) in grasslands former cultivated but not burned for the last 10 years, species diversity was slight higher and abundant taxa included the grasses Andropogon bicornis, Paspalum distichum, and Paspalum paspalodes, and the herbs Pteridium arachnoideum and Baccharis dracunculifolia; (iii) in native grasslands, never used for agriculture but recently burned, species diversity is higher but abundant taxa were just the grasses Aristida jubata and Paspalum rhodopedum; (iv) in native grasslands never cultivated nor burned for the last 10 years, species diversity was much higher and abundant taxa were the herbs Grazielia gaudichaudiana, Stevia clausenii, Chrysolaena platensis, and Lessingianthus grandiflorus. Additionally, typical grassland taxa as Chromolaena verbenacea, Allagoptera campestris, Croton antisiphyliticus, Cayaponia espelina, Leandra erostrata, and Byttneria hatschbachii have been found only in the undisturbed area. Thus, the areas showed diverse floristic composition, yet their biodiversity metrics and functional groups did not differ significantly. In summary, despite agriculture and fire decreasing the park species diversity, the base level for spontaneous recovery process did not reach thresholds that would prevent the maintenance of community structure.

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Floristic survey of the Furnas Gêmeas region, Campos Gerais National Park, Paraná state, southern Brazil

Cited by 4 publications

References 27 publications

Estrutura e composição em fisionomias campestres setentrionais do Sul do Brasil

Estrutura e composição em fisionomias campestres setentrionais do Sul do Brasil

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

Spontaneous recovery and the structure of plant community after agriculture use and fire in grasslands in the Vila Velha state park, South Brazil

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