Produção e espessura da serapilheira na borda e interior de fragmentos florestais de Mata Atlântica de diferentes tamanhos

Portela, Rita de Cássia Quitete; Santos, Flávio Antonio Maës dos

doi:10.1590/s0100-84042007000200011

Cited by 17 publications

(16 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their gametophytes are small and ephemeral, flat and green, and most grow in substrates above the soil level, rather than directly in the soil, to facilitate light absorption (Sharpe & Mehltreter 2010). In contrast, the deeper litter layer at the forest edges, under direct exposure to greater light intensities, faster winds and lower humidity, would decompose at a slower rate because of the lower humidity, and would consequently accumulate more than in the interior (Portela & Santos 2007).…”

Section: Discussionmentioning

confidence: 99%

The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions

Silva

Schmitt

2015

Acta Bot. Bras.

View full text Add to dashboard Cite

Edge effects impact species richness and composition as a result of environmental changes caused by fragmentation. This study analyzed edge effects on a community of terrestrial ferns and lycophytes in an Araucaria forest in Brazil at sites subjected to differing edge conditions: (1) a site bordering a road running through the interior of a conservation unit, and (2) a site bordering an agricultural property. Twelve 10 × 10 m plots were selected at the edge and in the interior of each site, and accounted for a total of 48 plots. The edges had lost their characteristic floristic identity, suggesting that many species are sensitive to variations in environmental conditions. The edge effect had a negative impact on species richness as shown by the greater average numbers of fern and lycophyte species in forest interiors at both sites. The results showed that the forest fragments in contact with agricultural areas were subjected to more intense edge effects than the fragments bordering a road within a conservation unit.

show abstract

Section: Discussionmentioning

confidence: 99%

The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions

Silva

Schmitt

2015

Acta Bot. Bras.

View full text Add to dashboard Cite

show abstract

“…This process is very seasonal, driven mainly by leaf-litterfall mass (Villela et al, 2006). In moist tropical forests, the C and N peak is in the wet season (Mazurec and Villela, 1998;Moraes et al, 1999;Cavi et al 2009), while in seasonally dry forests, the peak of litterfall mass and nutrient input is in the dry season, as reported for the Tabuleiro forest Villela et al, 2006), as in seasonal Atlantic forests elsewhere (Portela and Santos, 2007). However the annual and seasonal rainfall effect is not clear over the annual quantities of litterfall in Atlantic forests, as moist or dry forests produce annually about 5.5 to 10 Mg ha -1 year -1 litter mass (Mazurec and Villela, 1998;Moraes et al 1999;Villela et al 1998;Cavi et al 2009), a variation that may be driven also by other factors such as floristic composition, successional stage or soil type (Saiter et al, 2009).…”

Section: Effects Of Precipitation and Seasonality On Carbon And Nitromentioning

confidence: 84%

Carbon and nitrogen stock and fluxes in coastal Atlantic Forest of southeast Brazil: potential impacts of climate change on biogeochemical functioning

et al. 2012

View full text Add to dashboard Cite

The Atlantic Forest is one of the most important biomes of Brazil. Originally covering approximately 1.5 million of km 2 , today this area has been reduced to 12% of its original size. Climate changes may alter the structure and the functioning of this tropical forest. Here we explore how increases in temperature and changes in precipitation distribution could affect dynamics of carbon and nitrogen in coastal Atlantic Forest of the southeast region of Brazil The main conclusion of this article is that the coastal Atlantic Forest has high stocks of carbon and nitrogen above ground, and especially, below ground. An increase in temperature may transform these forests from important carbon sinks to carbon sources by increasing loss of carbon and nitrogen to the atmosphere. However, this conclusion should be viewed with caution because it is based on limited information. Therefore, more studies are urgently needed to enable us to make more accurate predictions.Keywords: Atlantic Forest, biogeochemistry, carbon, climatic changes, nitrogen, topography. Estoques e fluxos de carbono e nitrogênio nas zonas costeiras da Mata Atlântica do sudeste do Brasil: potenciais impactos das mudanças climáticas sobre o funcionamento biogeoquímico ResumoA Mata Atlântica é um dos mais importantes biomas do Brasil. Sua cobertura original estendia-se por aproximadamente 1,5 milhão de km 2 . Atualmente, sua área ocupa somente 12% de sua cobertura original. As mudanças climáticas podem alterar a estrutura e o funcionamento dessa floresta tropical. Neste artigo, discute-se como aumentos na temperatura do ar e mudanças na distribuição das chuvas podem afetar a dinâmica do carbono e do nitrogênio na Mata Atlântica litorânea da Região Sudeste brasileira, cuja disponibilidade de informações é maior. A principal conclusão deste artigo é que essas florestas detêm elevados estoques de carbono e nitrogênio acima do solo e, especialmente, abaixo do solo. Um aumento na temperatura do ar pode transformar essas florestas de sumidouros para fontes de carbono para a atmosfera por meio de um aumento nos processos de decomposição. Entretanto, essas conclusões devem ser vistas com cautela já que estão baseadas em um número limitado de informações. Portanto, é urgente que um número maior de informações seja produzido, permitindo conclusões mais robustas no futuro.Palavras-chave: biogeoquímica, carbono, Mata Atlântica, mudanças climáticas, nitrogênio, topografia.

show abstract

“…According to Vorobeichik (1997) the thickness of the litter layer is traditionally measured with low accuracy and is dependent on the collector and studies in Brazil (Portela and Santos, 2007) and in other countries are still based on rudimentary methods (e.g. Molofsky and Augspurger, 1992;Torti et al, 2001;Roovers, 2005;Mayor and Henkel, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Studies of the litter layer in Brazil and other countries are still based on rudimentary methods for the measurement of the thickness of the litter layer and sample collection. These included collection of leaves with www.elsevier.com/locate/foreco Available online at www.sciencedirect.com Forest Ecology and Management 255 (2008) 2244-2250 a spike (Molofsky and Augspurger, 1992;Torti et al, 2001), also called a litter probe (Mayor and Henkel, 2006), or by estimates of depth with a ruler (Muscolo et al, 2007;Roovers, 2005;Portela and Santos, 2007).…”

Section: Introductionmentioning

confidence: 99%

A new instrument for measurement and collection of quantitative samples of the litter layer in forests

Marimon‐Junior

Hay

2008

Forest Ecology and Management

View full text Add to dashboard Cite

Produção e espessura da serapilheira na borda e interior de fragmentos florestais de Mata Atlântica de diferentes tamanhos

Cited by 17 publications

References 30 publications

The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions

The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions

Carbon and nitrogen stock and fluxes in coastal Atlantic Forest of southeast Brazil: potential impacts of climate change on biogeochemical functioning

A new instrument for measurement and collection of quantitative samples of the litter layer in forests

Contact Info

Product

Resources

About