The effect of tropical forest conversion on soil microbial biomass

Basu, Swapan; Behera, Niranjan

doi:10.1007/bf00369310

Cited by 35 publications

(27 citation statements)

References 14 publications

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“…As reported by Marshman and Marshall (1991) clay particles act as an adsorption sink for organic matter, therefore the decline in clay contributed to the decline in organic matter in the barren site. Moreover, the loss of a proper microenvironment in the soil due to deforestation leads to the collapse of the decomposition process and this, ultimately, results in poor organic carbon and other nutrients in the soil (Basu and Behera, 1993). In accordance with Bulygin and Lisetskty (1991) soil Values are mean AE sd.…”

Section: Discussionmentioning

confidence: 54%

Impact of deforestation on soil physicochemical characteristics, microbial biomass and microbial activity of tropical soil

Sahani

Behera

2001

Land Degrad Dev

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The study dealt with the assessment of the impact of deforestation on tropical soil through a comparative analysis of physicochemical and microbiological parameters of natural forest and a deforested barren site. With signi®cant decline in clay, texturally the soil of the deforested barren site was observed to be different from that of natural forest. Bulk density and porosity data revealed structural deterioration of deforested barren soil. The soil hydrological regime was also adversely affected by the deforestation. Levels of soil organic carbon, total nitrogen, microbial biomass C, N and microfungal biomass also exhibited signi®cant decline in deforested site. Analysis of microbial respiratory quotient (q CO 2 ) was also observed to be impaired in the deforested site.

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Section: Discussionmentioning

confidence: 54%

Impact of deforestation on soil physicochemical characteristics, microbial biomass and microbial activity of tropical soil

Sahani

Behera

2001

Land Degrad Dev

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“…O aumento da erosão leva a uma perda ou remoção das partículas de argila (LAL, 1976(LAL, , 1989NARAIN et al, 1990). A perda de argila como impacto negativo do desmatamento foi reportada também em diversos estudos (BASU; BEHERA, 1993;PHASAD et al, 1994;ISLAM;WEIL, 2000;HAJABBASI et al, 1997;SAHANI;BEHERA, 2001), os quais corroboram as tendências observadas nesta pesquisa. O reflorestamento mais recente apresentou maior conteúdo de areia e menor de argila, enquanto que a área mais antiga exibiu conteúdos inversos de areia e argila.…”

Section: Discussionunclassified

“…Esse fato pode ser explicado pela frequente aplicação de fertilizantes na região, segundo constatação em campo, e deslocamento desses via enxurrada para a área em restauração, vizinha a cultivos de cana-deaçúcar que utilizam fertirrigação com vinhaça e adubação com torta de filtro, ambos muito ricos em potássio. Além da perda de nutrientes por lixiviação, uma menor atividade e biomassa microbiana em áreas degradadas e uma perda de microambientes no solo levam a um colapso nos processos de decomposição, resultando em uma deficiência de carbono e outros nutrientes no solo (AYANABA et al, 1976;PHASAD et al, 1994;BEHERA, 1993).…”

Section: Discussionunclassified

Caracterização das condições de microssítio de áreas em restauração com diferentes idades

Bertacchi¹,

Brancalion²,

Brondani

et al. 2012

Rev. Árvore

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e Ricardo Ribeiro Rodrigues² RESUMO -Os microssítios de regeneração são caracterizados por diversas combinações de atributos que representam condições que influenciam a germinação de sementes e o estabelecimento de plântulas. O conhecimento desses atributos pode contribuir para a determinação de metodologias adequadas de manejo, visando ao restabelecimento dos processos ecológicos nas áreas em processo de restauração. Dessa forma, o objetivo deste trabalho foi caracterizar e diferenciar as condições físico-químicas de microssítios de regeneração de áreas em processo de restauração florestal, visando identificar possíveis limitações físicas e químicas ao estabelecimento de espécies arbóreas nativas no sub-bosque. O estudo foi desenvolvido em reflorestamentos de espécies nativas com diferentes idades (10, 22 e 55 anos). Foi realizada a avaliação do grau de compactação, porosidade, umidade, conteúdo de matéria orgânica e nutrientes e granulometria do solo, bem como a massa de matéria seca de serapilheira e a cobertura do dossel de cada área de estudo. Houve aumento da cobertura do dossel, da porosidade, da umidade, do conteúdo de argila, da matéria orgânica e de outros nutrientes, e uma diminuição da compactação do solo, com o aumento da idade da restauração. Assim, conclui-se que, com a evolução da restauração, as condições de microssítio de regeneração estão se assemelhando gradativamente às presentes nos ecossistemas de referência, sendo este um aspecto positivo para que o recrutamento de espécies nativas seja favorecido ao longo do tempo.Palavras-chave: Sítio de estabelecimento, Restauração florestal e Estabelecimento de plântulas. CHARACTERIZATION OF THE MICRO-SITE CONDITIONS FROM RESTORED AREAS WITH DIFFERENT AGES

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“…These changes may decrease the soil organic C pool, reduce structural stability, increase soil's susceptibility to water runoff and erosion, disrupt cycles of water, C, nitrogen (N) and other elements and cause adverse impacts on biomass productivity, biodiversity and the environment. Basu and Behera [60] reported decline of organic C by 40-46% in India. Saikh et al [61] and Tripathi and Singh [19] have also reported a decline of 38% in OC due to alternate land uses.…”

Section: Physico-chemical Characteristicsmentioning

confidence: 98%

“…Srivastava and Singh [52], and Singh [88] reported that there was a decline of 31-42% in microbial nutrients due to savannization and 46-62% due to cultivation in dry tropical forest ecosystem of Vindhyan range. Basu and Behera [60], Singh [62] have shown a decline of 50% and 42%, respectively in MBN in savanna ecosystem over the forest ecosystem. Recent work has shown that microbial diversity in soil ecosystems is reduced because of land-use intensification and increased nutrient availability (e.g.…”

Section: Net Nitrification and Net N-mineralizationmentioning

confidence: 99%

Impact of Savannization on Nitrogen Mineralization in an Indian Tropical Forest

Tripathi¹,

Singh²

2012

Forest Res

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The effects of conversion of an Indian dry tropical forest ecosystem into savanna, on mineral nitrogen (N), net N-mineralization rate and microbial biomass carbon (MBC), nitrogen (MBN) and phosphorus (MBP) in soil were studied for two years. There was a marked seasonal variation in all the above parameters at both (upper, 0-10 cm and lower, 10-20 cm) the soil depths of forest and savanna ecosystems. In forest ecosystems the mean annual values of mineral N, net nitrification rate, net N-mineralization rate, MBC, MBN and MBP at both depths were 17. 41 respectively. The soil microbial biomass was positively related to root biomass and total plant biomass (i.e., above-and below-ground biomass). Interestingly, seasonal soil moisture and temperature are reciprocally related to microbial biomass and mineral N and directly related to nitrification and N-mineralization. The microbial biomass, nitrification and N-mineralization are negatively related to clay content. Savannization caused significant loss of soil mean organic carbon (OC), total N (TN) total mean annual nitrification, N-mineralization, MBC, MBN and MBP by 40,42,27,27, 29 and 7%, respectively at upper soil depth and 18,21,42, 29 and 22%, respectively at lower soil depth. The reflectances of soil microbial biomass to OC were 1.22 and 1.06 folds at upper and lower soil depths, respectively.Thus, conversion of dry tropical forests into savanna affects remarkably the soil N transformation; microbial biomass and loss of soil organic C which adds to the environmental pollution.

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The effect of tropical forest conversion on soil microbial biomass

Cited by 35 publications

References 14 publications

Impact of deforestation on soil physicochemical characteristics, microbial biomass and microbial activity of tropical soil

Impact of deforestation on soil physicochemical characteristics, microbial biomass and microbial activity of tropical soil

Caracterização das condições de microssítio de áreas em restauração com diferentes idades

Impact of Savannization on Nitrogen Mineralization in an Indian Tropical Forest

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