Dinâmica Da Chuva De Sementes Em Remanescente De Floresta Estacional Subtropical

Sccoti, Marta Silvana Volpato; Araújo, Maristela Machado; Tonetto, Thaíse da Silva; Longhi, Solon Jonas

doi:10.5902/1980509825109

Cited by 17 publications

(13 citation statements)

References 8 publications

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“…The predominance of zoochory in seasonal forest in southern Brazil (Figure 3), has been reported by several authors (Scipioni et al, 2011;Giehl et al, 2007;Scipioni et al, 2013;Sccoti et al, 2016). This also seems to be a typical pattern of forests in tropical Brazil.…”

Section: Scattering Syndromesupporting

confidence: 81%

How Bovine Livestock Affects Seed Rain in Subtropical Climate Forest

Stefanello¹,

Rovedder²,

Felker³

et al. 2019

JAS

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Seed rainfall may be one of the mechanisms most impacted by livestock production in forest remnants. The trampling and cattle grazing alter dynamics, structure and floristic composition of the forest. The present work characterized the seed rainin forest remnants and the possible impacts of the presence and the management regime with different cattle stocks in the Pampa biome, southern region of Brazil. We compared three areas in Seasonal Forest remnants with a management history of 43 years: cattle exclusion area (A1); area with a cattle stock of 0.5 ua ha-1 (A2); and area with cattle stock of 1.0 ua ha-1 (A3). The seed rain was collected quarterly in 16 collectors (1 × 1 m²) per area for 24 months. The seeds were counted and identified according to external morphological characteristics, habit and dispersion syndrome. Shannon diversity index, submitted to the Hutcheson test, Pielou evenness, expected diversity and floristic similarity were determined. The results indicated that the impacts caused by livestock to seed rain were more significant in A3 where a quantitative reduction in the number of seeds was observed, probably due to the low number of plant individuals that make up the community.

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Section: Scattering Syndromesupporting

confidence: 81%

How Bovine Livestock Affects Seed Rain in Subtropical Climate Forest

Stefanello¹,

Rovedder²,

Felker³

et al. 2019

JAS

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“…A RNR (%) foi obtida pela média aritmética dos valores relativos de abundância, frequência e categoria de tamanho (CT). Para o cálculo da CT foram estabelecidas inicialmente as classes de tamanhos de altura, baseadas em Sccoti (2012): Classe I: 20 ≤ altura (h) < 50 cm; Classe II: 50 ≤ h < 100 cm; Classe III: 100 ≤ h < 150 cm; Classe IV: 150 ≤ h < 200 cm; Classe V: h ≥ 200 cm e DAP < 5 cm. Conforme Souza & Soares (2013), a CT absoluta por espécie é obtida pela soma das multiplicações do número de indivíduos de cada espécie, em cada classe, pelo peso de cada classe de regeneração.…”

Section: Methodsunclassified

Fitossociologia e fatores ecológicos condicionantes da vegetação em uma floresta estacional na região central do Rio Grande do Sul, Brasil

Callegaro¹,

Araújo²,

Longhi³

et al. 2017

Iheringia Ser Bot

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RESUMO -Compreender a fi tossociologia e fatores ecológicos condicionantes pode subsidiar intervenções em fl orestas. Nesse contexto, objetivouse analisar os componentes arbóreo e regenerante e a infl uência das variáveis ambientais na distribuição de espécies, em uma Floresta Estacional na região central do Rio Grande do Sul. O estrato arbóreo foi amostrado em 33 parcelas instaladas sistematicamente, sendo em cada parcela instaladas subunidades para amostrar a regeneração natural. As principais espécies no componente arbóreo foram Trichilia clausseni C.DC. e Nectandra megapotamica (Spreng.) Mez e na regeneração natural foram Trichilia elegans A. Juss. e Cupania vernalis Cambess. Relevo, solo e dossel condicionaram espécies do estrato arbóreo e regeneração natural. O estádio regenerante das espécies foi condicionado por variáveis distintas das relacionadas ao estádio adulto. Contudo, ocorreram casos em que apenas uma variável, por exemplo, a relação entre o teor de matéria orgânica no solo e Trichilia elegans, infl uenciou tanto o estádio adulto quanto o regenerante. Palavras-chave: conservação fl orestal, ecologia, relação ambiente-vegetação ABSTRACT -Phytosociology and ecological factors on vegetation in a seasonal forest in the central area of Rio Grande do Sul, Brazil.Understanding the phytosociology and conditioning ecological factors of the vegetation can subsidize interventions in forests.. We analyzed the arboreal stratum and natural regeneration, as well as the infl uence of environmental variables on species distribution in a seasonal forest in central Rio Grande do Sul, Brazil. Thirty-three plots were systematically installed for the arboreal stratum sampling. In each plot, the natural regeneration Class I and Class II were measured. The main species were Trichilia elegans and Cupania vernalis in natural regeneration and Trichilia clausseni and Nectandra megapotamica in arboreal stratum. Relief, soil, and canopy infl uenced the arboreal stratum and natural regeneration of species. In general, the regenerating stage of the species was conditioned by distinct variables from those related to the adult stage. However, there were cases where only one variable infl uenced both the adult and the regenerating stages, such as the relationship between soil organic matter content and Trichilia elegans.

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“…Area 4 correlated with species attractive to dispersing fauna such as M. umbellata, E. deciduum, A. edulis, C. obtusa and D. inconstans (Sccoti et al, 2016;Capelesso et al, 2018;Guarino et al, 2018) and melliferous species such as M. regenellii (Radaeski et al, 2019), which is advantageous to the processes of connectivity and maintenance of forest remnants due to the displacement of fauna (Brandão et al, 2017).…”

Section: /8mentioning

confidence: 99%

“…Area 4 is more closely related to the zoochoric dispersion syndrome (Figure 2). A predominance of zoochoric syndrome in subtropical and neotropical forest ecosystems has been widely documented (Budke et al 2005;Giehl et al 2007;Scipioni et al, 2013;Sccoti et al, 2016;Capellesso et al, 2018). On the other hand, the relationship between the seed rain composition and the successional stage has produced less consensus even until today.…”

Section: /8mentioning

confidence: 99%

Seed rain as an ecological indicator of forest restoration in the Pampa biome

Procknow

Rovedder

Piaia

et al. 2020

Agraria

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This study evaluated seed rain in different forest formation soil uses in the Serra do Sudeste region, Pampa biome. Four area were selected: active restoration (Area 1), passive restoration (Area 2), eucalyptus commercial plantation (Area 3) and native forest (Area 4). Ten permanent collectors of 1 m² each were installed in each area, being suspended 1 meter above the soil surface. Collections were made monthly for twelve months in 2018. The analyzed variables were: the number of morphospecies, number of individuals, the indices of Margalef richness, Pielou evenness, Shannon diversity, Jaccard floristic similiarity, and possible correlations by detrended correspondence analysis (DCA). Total number of seeds sampled during the period was 239,988, distributed across 116 morphospecies. The area under active restoration (Area 1) did not differ statistically by the Kruskall-Wallis test (p < 0.05) of the native forest (Area 4) for the number of seeds. Area 1 presented a higher number of morphospecies and greater diversity of species, followed by Area 4. Seed rain can be a promising ecological indicator for the conditions of the present study.

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Dinâmica Da Chuva De Sementes Em Remanescente De Floresta Estacional Subtropical

Cited by 17 publications

References 8 publications

How Bovine Livestock Affects Seed Rain in Subtropical Climate Forest

How Bovine Livestock Affects Seed Rain in Subtropical Climate Forest

Fitossociologia e fatores ecológicos condicionantes da vegetação em uma floresta estacional na região central do Rio Grande do Sul, Brasil

Seed rain as an ecological indicator of forest restoration in the Pampa biome

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