Riqueza e composição florística da comunidade de samambaias na mata ciliar do Rio Cadeia, Rio Grande do Sul, Brasil

Mallmann, Ivanete Teresinha; Schmitt, Jairo Lizandro

doi:10.5902/1980509813327

Cited by 12 publications

(10 citation statements)

References 2 publications

(5 reference statements)

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“…It facilitates the coexistence of species both by inhibiting the dominance of some woody plants and by providing habitat for the establishment of epiphytes and hemiepiphytes, which enlarges the diversity of plants in the forest (Negrão et al, 2017). Due to the presence of a porous mass of adventitious roots that holds great humidity (Cortez, 2001), the species is fundamental to the reproductive success of ferns (Becker et al, 2015) and constitutes an exclusive (Becker et al, 2015;Mallmann and Schmitt, 2014) or preferential microhabitat for some species Cortez, 2001).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

et al. 2019

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Dicksonia sellowiana Hook. (Dicksoniaceae) is target of extractive exploitation and is threatened with extinction. We analyzed the population structure, the spatial distribution pattern of D. sellowiana and its relationship with environmental parameters within three fragments of Araucaria Forest in Rio Grande do Sul, Brazil. The fragments are of different sizes, namely, large (H1LF) with 246 ha, medium (H2MF) with 57 ha and small (H3SF) with 5.2 ha. Within each site, 1 ha was delimited, divided into 100 subplots (100 m2), of which 20 were selected with a draw. In each subplot, counting of the individuals, the registration of the caudice height and the coverage of leaves (SC) (m2), measurements of photosynthetically active radiation (PAR), canopy opening degree (CO), soil moisture (SM) and litter thickness (LT). The temperature (T) was measured inside each site. A total of 792 plants were sampled, of which 551 were concentrated in H1LF, 108 in H2MF and 133 in H3SF. An average of 1320 ha-1 individuals were estimated. Of the total including the three fragments, 96.9% of the individuals are in the first class of height (up to 0.8 m), indicating a great potential of population development. The spatial distribution pattern (AI) was aggregated in the three populations and the plants presented a heterogeneous total coverage, between 4.73 m2 (H2MF) and 2,223.47 m2 (H1LF). The highest values of SC and SM were more related to the distribution of individuals in H1LF whereas the opposite was recorded in H2MF. The highest values of PAR, LT and CO correlated with the distribution of D. sellowiana in H3SF. In addition to revealing that the H1LF population is among the most dense in southern Brazil, the results demonstrated a significant structural distinction between the interior populations of the fragments, in spite of them being located near to one another and being part of the same natural field matrix.

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Section: Introductionmentioning

confidence: 99%

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

et al. 2019

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“…A distribuição dos indivíduos arbóreos em intervalo de classe de diâmetro em forma de "J reverso" caracteriza uma comunidade com grande estoque de indivíduos arbóreos jovens, denotando o potencial autorregenerativo do ponto de vista ecológico (MALLMANN & SCHMITT, 2014). O somatório dos três intervalos de classe iniciais totalizou 88,00 % da densidade total de árvores vivas da comunidade o que caracteriza a predominância de indivíduos jovens.…”

Section: Resultsunclassified

Indicadores Florísticos, Fitossociológicos E De Produtividade Em Área Nativa De Cerrado

Coelho¹,

Goergen²,

Condessa³

et al. 2017

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RESUMOA área avaliada é de cerrado stricto sensu no município de Peixe-TO onde foram estudados parâmetros florísticos, fitossociológicos e de produtividade (volume, estoque de carbono e biomassa aéreos) com o objetivo de determinar o potencial de uso madeireiro e não madeireiro. O método utilizado foi a instalação de inventário florestal sistemático temporário sendo as variáveis analisadas: altura total (m), CAP (valores ≥ 16 cm), posição sociológica, qualidade do fuste, categorias sucessionais e identificação botânica. Para determinar a produtividade foram utilizadas equações consagradas na literatura florestal. Foram identificados 492 indivíduos arbóreos, pertencentes a 51 espécies e 25 famílias botânicas. As famílias que se destacaram em riqueza foram: Leguminosa-caesalpinoidea (107), Apocinaeceae (93), Vochysiaceae (40). As estimativas do estoque de carbono aéreo foram de 19,18 ton.ha ) estão nas classes inferiores a 16 cm, com uso exclusivo para lenha e carvão. Com uso potencial para estaca e lapidados, estima-se um volume de 2,94 m³.ha1 (16,79% do total). Foram encontrados 3,8% de indivíduos com potencial para serraria (DAP > 31 cm). Em relação aos usos não madeireiros, verificou-se potencial das espécies para recuperação de áreas degradadas, arborização, paisagismo e ornamentação. PALAVRAS-CHAVE: diversidade, potencial madeireiro, potencial não madeireiro. FLORISTIC, PHYTOOSOCIOLOGICAL AND PRODUCTIVITY INDICATORS IN CERRADO NATIVE AREA ABSTRACTThe evaluated area is of cerrado stricto sensu in the municipality of Peixe-TO where floristic, phytosociological and productivity parameters (volume, carbon stock and aerial biomass) were studied in order to determine the potential of wood and non-

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“…De la Sota (1977) mentions that this species is present in piedmont forests in northwestern Argentina, growing on walls and humid sites. It has frequently been mentioned as a species present in riparian forests and showing tolerance to reduced environmental quality, due to human action and to the edge effects occurring in these environments (Forsthofer and Athayde-Filho, 2012;Miguez et al, 2013;Mallmann and Schmitt, 2014;Mallmann et al, 2016;Graeff et al, 2019;Silva et al, 2019). Water regime in riparian forests is associated with precipitations and seasonal changes; therefore, river flow and water availability vary throughout the year (Granados-Sánchez et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Anatomía del esporofito de Anemia phyllitidis var. phyllitidis (Anemiaceae) de un bosque de ribera (Tucumán, Argentina)

2021

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Background and Aims: In Argentina seven species of the genus Anemia are recognized; one of them, A. phyllitidis, has two varieties. The anatomical records for A. phyllitidis var. phyllitidis are scarce and refer to the ontogeny of stomata, epidermis structure and type of petiole stele. This variety, which occurs in riparian forests, is affected by the increase of seasonal ecological pressures. There is scarce information about its sporophyte anatomy; hence, the aim of this work was to characterize it.Methods: Five specimens were collected from the margin of the El Parque stream (Tucumán-Argentina). A part was herborized and the other part was fixed in FAA. Subsequently, conventional histological techniques were used and stoma density and size of stomata and trichomes were determined. Histochemical tests were performed to detect starch (lugol) and phenolic compounds (10% ferric chloride).Key results: Anemia phyllitidis var. phyllitidis shows diarch roots and dictyostelic rhizome covered with glandular trichomes. The petiole is covered by glandular trichomes, epidermis and subepidermis composed of lignified fibers, vascular bundle with phloem surrounding xylem, two-layered pericycle surrounded by endodermis and cortical tissue with starch and phenolic compounds. Sterile pinnae have pericytic, anomocytic, and desmocytic stomata (mean size 49.8 µm × 38.7 µm); glandular trichomes; dorsoventral hypostomatic lamina, vascular bundles with pericycle and endodermis. Fertile pinnae are anatomically similar to the rachis. Silica is present in some epidermal cells of the different organs.Conclusions: The sporophyte of A. phyllitidis var. phyllitidis showed anatomical, morphological and physiological traits that reveal its adaptation to the riparian habitat where it grows. At the same time, the description of this variety is deepened and unpublished data for the genus are provided, such as the presence of stegmata in the fertile pinnae.

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Riqueza e composição florística da comunidade de samambaias na mata ciliar do Rio Cadeia, Rio Grande do Sul, Brasil

Cited by 12 publications

References 2 publications

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

Indicadores Florísticos, Fitossociológicos E De Produtividade Em Área Nativa De Cerrado

Anatomía del esporofito de Anemia phyllitidis var. phyllitidis (Anemiaceae) de un bosque de ribera (Tucumán, Argentina)

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