Effects of Season and Four Tree Species on Soluble Carbon Content in Fresh and Decomposing Litter of Temperate Forests1

Harris, M. M.; Safford, L. O.

doi:10.1097/00010694-199602000-00008

Cited by 43 publications

(17 citation statements)

References 18 publications

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“…Depending on tree species, there are differences in the leaching of substances from litter. The waxes of the surface layer and high concentration of lignin and other polyphenolic compounds make needle litter difficult to decompose, whereas leaf litter contains more easily leached and decomposed water-soluble compounds: sugars, amino acids and aliphatic acids (Harris and Safford, 1996). It is possible that the leaching of recalcitrant substances from pine litter is lower in soil profile; otherwise, they would have been inhibitory to fungal community in subsurface soil.…”

Section: Fungal Community Structurementioning

confidence: 99%

Microfungal community structure from forest soils in Northern Thrace Region, Turkey

Kara

Asan

2007

Ann. Microbiol.

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The soil fungi in the pure stand of oak (Quercus petraea), beech (Fagus orientalis), and pine (Pinus nigra) were investigated by the dilution plate method at Yıldız Mountain in Thrace region. The mycobiota, as well as the number of isolates per plate, was determined at various soil depths. Principal component analysis of the soil profiles indicated that there was variation in mycobiota composition and the variation was attributed to differences among the ecosystems. When comparing conifer and hardwood soils, using Sorenson's similarity index, fungal community composition corresponded more closely between the hardwood stands than with the conifer stand. Fungal community composition appears to be influenced by the organic compounds entering soil from plant litter.

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Section: Fungal Community Structurementioning

confidence: 99%

Microfungal community structure from forest soils in Northern Thrace Region, Turkey

Kara

Asan

2007

Ann. Microbiol.

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“…No sistema biogeográfico do cerrado, no mês de agosto, época em que foram coletadas as amostras, notou-se uma grande deposição de resíduos vegetais decorrentes da estação seca, sobretudo nos ambientes naturais, o que certamente contribuiu para os maiores valores de CS encontrados no solo sob floresta nativa. O resultado pode ser também similar à constatação de Harris & Safford (1996) de que há aumento na produção do C solúvel no solo, para os materiais recentemente depositados. Espera-se que o solo sob floresta nativa esteja sempre recebendo novos materiais vegetais, o que mantém sua qualidade.…”

Section: Carbono Orgânico Lábil E Carbono Solúvel Em áGuaunclassified

Formas de carbono em Latossolo Vermelho Eutroférrico sob plantio direto no sistema biogeográfico do cerrado

Rosa

Olszevski

Mendonça

et al. 2003

Rev. Bras. Ciênc. Solo

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RESUMOEste trabalho teve por objetivo avaliar aspectos da física, química e da dinâmica de carbono de um Latossolo Vermelho Eutroférrico, sob diferentes condições de uso. Foram utilizados materiais de solo cultivado com plantio direto, irrigado e sequeiro, e sob floresta nativa, na região de Santa Helena de Goiás (GO). As amostras foram coletadas de camadas de 0,00-0,05, 0,05-0,10, 0,10-0,20, 0,20-0,30 e 0,30-0,40 m e separadas em agregados maiores e menores que 0,25 mm. Foram realizadas análises químicas e físicas para caracterização do solo e determinados o carbono orgânico total, o carbono mineralizável, o carbono da biomassa microbiana, o carbono solúvel em água e a matéria orgânica lábil. Os resultados, indicaram que o plantio direto não foi capaz de manter os níveis de carbono nos agregados, quando comparado ao solo sob floresta nativa; a matéria orgânica desempenhou papel relevante na formação e estabilização de agregados maiores que 0,25 mm; a porosidade, resistência ao penetrômetro e densidade do solo demonstraram que houve aumento da compactação do solo no sistema plantio direto, quando comparado ao solo sob floresta nativa, tendo a densidade se mostrado uma variável satisfatória para a avaliação de compactação no Latossolo Vermelho Eutroférrico; a matéria orgânica lábil apresentou potencial para ser utilizada em estudos de ciclagem de nutrientes e fenômenos de dispersão e floculação de argila.Termos de indexação: cerrado; plantio direto; matéria orgânica do solo.

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“…The water expansion than accompanies freezing can lyse microbial cells (Skogland et al 1988;Yanai et al 2004;Larsen et al 2002), disrupt soil aggregates (Oztas and Fayetorbay 2003;Six et al 2004) and break up plant material (Mellick and Seppelt 1992;Harris and Safford 1996). Subsequent thaws lead to increased outputs of particulate and soluble material in melt water (Deluca et al 1992; Wang and Bettany 1993;Vas et al 1994) and increased trace gas losses (Chen et al 1995;Chang and Hao 2001;Muller et al 2002).…”

mentioning

confidence: 99%

Climate change and soil freezing dynamics: historical trends and projected changes

2007

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Changes to soil freezing dynamics with climate change can modify ecosystem carbon and nutrient losses. Soil freezing is influenced strongly by both air temperature and insulation by the snowpack, and it has been hypothesized that winter climate warming may lead to increased soil freezing as a result of reduced snowpack thickness. I used weather station data to explore the relationships between winter air temperature, precipitation and soil freezing for 31 sites in Canada, ranging from the temperate zone to the high Arctic. Inter-annual climate variation and associated soil temperature variation over the last 40 years were examined and used to interpolate the effects of projected climate change on soil freezing dynamics within sites using linear regression models. Annual soil freezing days declined with increasing mean winter air temperature despite decreases in snow depth and cover, and reduced precipitation only increased annual soil freezing days in the warmest sites. Annual soil freeze-thaw cycles increased in both warm and dry winters, although the effects of precipitation were strongest in sites that experience low mean winter precipitation. Overall, it was projected that by 2050, changes in winter temperature will have a much stronger effect on annual soil freezing days and freeze-thaw cycles than changes in total precipitation, with sites close to but below freezing experiencing the largest changes in soil freezing days. These results reveal that experimental data relevant to the effects of climate changes on soil freezing dynamics and changes in associated soil physical and biological processes are lacking.

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Effects of Season and Four Tree Species on Soluble Carbon Content in Fresh and Decomposing Litter of Temperate Forests1

Cited by 43 publications

References 18 publications

Microfungal community structure from forest soils in Northern Thrace Region, Turkey

Microfungal community structure from forest soils in Northern Thrace Region, Turkey

Formas de carbono em Latossolo Vermelho Eutroférrico sob plantio direto no sistema biogeográfico do cerrado

Climate change and soil freezing dynamics: historical trends and projected changes

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