Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFRPE |
Texto Completo: | http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8297 |
Resumo: | Desertification is an aggravating reality in tropical semiarid regions and has been the target of several studies that aim to establish relationships among vegetation, soil type and resident microbiota. In this study, we evaluated the changes in the activities, structure and abundance of microbial communities in chromic Luvisols, located in Pernambuco (Brazil) under different levels of desertification, as well as identified which soil attributes were responsible for shaping the microbial communities, and defied environmental quality indicators for the Caatinga biome. Carbon, nitrogen and phosphorus from soil microbial biomass (C-BMS, N-BMS, P-BMS), soil basal respiration, soil enzymatic activities (alkaline phosphatase and urease), structure and abundance of ribosomal and functional genes were evaluated. Besides, microbial quotient, metabolic quotient, chemical and physical attributes, alkaline phosphatase and urease activity, easily extractable glomalin and total glomalin were also determined. Soil samples were collected in triplicate by soil horizons in three conditions: i- at desertified soil (P1) - Itacuruba (PE); ii- at process of desertification (P2) - Itacuruba (PE) and iii- at preserved secondary Caatinga (P3) -Serra Talhada (PE). We used a multivariate planning analysis to evaluate the influence of chemical, physical and microbiological attributes of Luvisols under desertification levels. In addition to reducing the dimensionality of the data and identifying microbiological indicators of soil quality that responded significantly to desertification, a multivariate analysis was used. 16S rRNA (bacteria), 18S rRNA (fungi), nifH (biological nitrogen fixation), amoA (oxidizing ammonium bacteria - AOB) and phoD (phosphorus solubilization) genes abundance were subjected to variance analysis (One-way ANOVA) and the means compared by Tukey test (p<0.05), as well as for C-BMS, N-BMS, P-BMS, basal respiration, alkaline phosphatase, urease, glomalin and all other soil chemical and physical variables. Desertification almost completely compromised the biological, chemical and physical attributes of Luvisols, this resulted in significant losses in carbon, and nitrogen stocks, especially in the A surface horizon. However, we found that soil depth also influences on soil attributes, so it was not possible to define whether it is the horizon or depth that defines the role of the microbiota. Both the level of desertification and the pedogenetic horizon modeled the structure of microbial communities, however some community overlaps were identified. In the preserved Caatinga condition it was possible to observe a segregation between the superficial and subsurface soil, while in the desertified soil a narrowing of the microbial community was registered. In soil under desertification, depending on the gene evaluated, sometimes resembles the reference, sometimes with the desertified. A large impact on soil carbon stock was highlighted, showing significant reductions that exceed 60% of the amount stored in the studied Luvisols. |
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FRACETTO, Giselle Gomes MonteiroFRACETTO, Felipe José CurySOUZA JÚNIOR, Valdomiro Severino dehttp://lattes.cnpq.br/5747105157779423SANTOS, Tiago de Oliveira2019-10-23T14:57:00Z2019-08-23SANTOS, Tiago de Oliveira. Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil. 2019. 116 f. Tese (Programa de Pós-Graduação em Ciência do Solo) - Universidade Federal Rural de Pernambuco, Recife.http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8297Desertification is an aggravating reality in tropical semiarid regions and has been the target of several studies that aim to establish relationships among vegetation, soil type and resident microbiota. In this study, we evaluated the changes in the activities, structure and abundance of microbial communities in chromic Luvisols, located in Pernambuco (Brazil) under different levels of desertification, as well as identified which soil attributes were responsible for shaping the microbial communities, and defied environmental quality indicators for the Caatinga biome. Carbon, nitrogen and phosphorus from soil microbial biomass (C-BMS, N-BMS, P-BMS), soil basal respiration, soil enzymatic activities (alkaline phosphatase and urease), structure and abundance of ribosomal and functional genes were evaluated. Besides, microbial quotient, metabolic quotient, chemical and physical attributes, alkaline phosphatase and urease activity, easily extractable glomalin and total glomalin were also determined. Soil samples were collected in triplicate by soil horizons in three conditions: i- at desertified soil (P1) - Itacuruba (PE); ii- at process of desertification (P2) - Itacuruba (PE) and iii- at preserved secondary Caatinga (P3) -Serra Talhada (PE). We used a multivariate planning analysis to evaluate the influence of chemical, physical and microbiological attributes of Luvisols under desertification levels. In addition to reducing the dimensionality of the data and identifying microbiological indicators of soil quality that responded significantly to desertification, a multivariate analysis was used. 16S rRNA (bacteria), 18S rRNA (fungi), nifH (biological nitrogen fixation), amoA (oxidizing ammonium bacteria - AOB) and phoD (phosphorus solubilization) genes abundance were subjected to variance analysis (One-way ANOVA) and the means compared by Tukey test (p<0.05), as well as for C-BMS, N-BMS, P-BMS, basal respiration, alkaline phosphatase, urease, glomalin and all other soil chemical and physical variables. Desertification almost completely compromised the biological, chemical and physical attributes of Luvisols, this resulted in significant losses in carbon, and nitrogen stocks, especially in the A surface horizon. However, we found that soil depth also influences on soil attributes, so it was not possible to define whether it is the horizon or depth that defines the role of the microbiota. Both the level of desertification and the pedogenetic horizon modeled the structure of microbial communities, however some community overlaps were identified. In the preserved Caatinga condition it was possible to observe a segregation between the superficial and subsurface soil, while in the desertified soil a narrowing of the microbial community was registered. In soil under desertification, depending on the gene evaluated, sometimes resembles the reference, sometimes with the desertified. A large impact on soil carbon stock was highlighted, showing significant reductions that exceed 60% of the amount stored in the studied Luvisols.A desertificação é uma realidade agravante no semiárido tropical e atualmente tem sido alvo de diversos estudos que buscam estabelecer relações entre a vegetação, o solo e a microbiota residente. O objetivo deste trabalho foi avaliar alterações na atividade, estrutura e abundância de comunidades microbianas em Luvissolos crômicos, inseridos no Semiárido pernambucano sob diferentes níveis de desertificação, bem como identificar quais atributos do solo moldam as comunidades, definindo indicadores de qualidade ambiental para o bioma Caatinga. Carbono, nitrogênio e fósforo na biomassa microbiana do solo (C-BMS, N-BMS, P-BMS), respiração basal do solo, atividades enzimáticas no solo (fosfatase alcalina e urease), estrutura e abundância de genes ribossomais e funcionais foram avaliados. Quociente microbiano, quociente metabólico, atributos químicos e físicos, atividade da fosfatase alcalina e urease, glomalina facilmente extraível e glomalina total foram determinadas. As amostras de solo foram coletadas em triplicata, por horizontes, em três perfis: desertificado (P1) - Itacuruba (PE); em processo de desertificação (P2) - Itacuruba (PE); e em Caatinga secundária preservada (P3) - Serra Talhada (PE). Para avaliar a influência dos atributos químicos, físicos e microbiológicos dos Luvissolos sob níveis de desertificação, diminuir a dimensionalidade dos dados e identificar indicadores microbiológicos de qualidade do solo, durante o período seco, e que respondessem significativamente à desertificação foi empregada análise multivariada de ordenamento, para tal foi utilizada a estrutura da comunidade microbiana (DGGE). A abundância dos genes 16S rRNA, 18S rRNA (fungos), nifH (fixação biológica de nitrogênio), amoA (bactérias amônio oxidantes - AOB) e phoD (solubilização de fósforo) foi submetida à análise de variância (ANOVA One-way) e as médias comparadas pelo teste de Tukey (p <0,05), assim como para o C-BMS, N-BMS, P-BMS, respirometria, fosfatase alcalina, urease, glomalina e todas as demais variáveis químicas e físicas do solo. A desertificação resultou em perdas substanciais nos estoques de carbono e nitrogênio, principalmente no horizonte superficial A. Entretanto, constatou-se que a profundidade também detém influência sobre os atributos do solo não sendo possível definir se é o horizonte ou a profundidade que rege a microbiota em solos. A estrutura das comunidades microbianas foi moldada tanto pelo nível de desertificação quanto pelo horizonte pedogenético, contudo algumas sobreposições de comunidades foram identificadas. Na condição de Caatinga preservada foi possível observar uma segregação entre o solo superficial e subsuperficial, já na área desertificada um estreitamento da comunidade foi registrado. E para a área em desertificação, dependendo do gene, oras assemelha-se com a referência, ora com a desertificada. Grande impacto no estoque de carbono do solo foi apontado, apresentando reduções significativas que ultrapassam 60% do montante estocado nos Luvissolos estudados.Submitted by Mario BC (mario@bc.ufrpe.br) on 2019-10-23T14:57:00Z No. of bitstreams: 1 Tiago de Oliveira Santos.pdf: 3176086 bytes, checksum: 911497ee81aea7957cd4305a4b9dc6cd (MD5)Made available in DSpace on 2019-10-23T14:57:00Z (GMT). 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dc.title.por.fl_str_mv |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
dc.title.alternative.eng.fl_str_mv |
Microbial communities and carbon and nitrogen stocks in chromic luvisol under different degradation levels in Brazil's semiarid |
title |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
spellingShingle |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil SANTOS, Tiago de Oliveira Microbiologia do solo Luvissolo crômico Carbono Nitrogênio Semiárido AGRONOMIA::CIENCIA DO SOLO |
title_short |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
title_full |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
title_fullStr |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
title_full_unstemmed |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
title_sort |
Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil |
author |
SANTOS, Tiago de Oliveira |
author_facet |
SANTOS, Tiago de Oliveira |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
FRACETTO, Giselle Gomes Monteiro |
dc.contributor.advisor-co1.fl_str_mv |
FRACETTO, Felipe José Cury |
dc.contributor.advisor-co2.fl_str_mv |
SOUZA JÚNIOR, Valdomiro Severino de |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5747105157779423 |
dc.contributor.author.fl_str_mv |
SANTOS, Tiago de Oliveira |
contributor_str_mv |
FRACETTO, Giselle Gomes Monteiro FRACETTO, Felipe José Cury SOUZA JÚNIOR, Valdomiro Severino de |
dc.subject.por.fl_str_mv |
Microbiologia do solo Luvissolo crômico Carbono Nitrogênio Semiárido |
topic |
Microbiologia do solo Luvissolo crômico Carbono Nitrogênio Semiárido AGRONOMIA::CIENCIA DO SOLO |
dc.subject.cnpq.fl_str_mv |
AGRONOMIA::CIENCIA DO SOLO |
description |
Desertification is an aggravating reality in tropical semiarid regions and has been the target of several studies that aim to establish relationships among vegetation, soil type and resident microbiota. In this study, we evaluated the changes in the activities, structure and abundance of microbial communities in chromic Luvisols, located in Pernambuco (Brazil) under different levels of desertification, as well as identified which soil attributes were responsible for shaping the microbial communities, and defied environmental quality indicators for the Caatinga biome. Carbon, nitrogen and phosphorus from soil microbial biomass (C-BMS, N-BMS, P-BMS), soil basal respiration, soil enzymatic activities (alkaline phosphatase and urease), structure and abundance of ribosomal and functional genes were evaluated. Besides, microbial quotient, metabolic quotient, chemical and physical attributes, alkaline phosphatase and urease activity, easily extractable glomalin and total glomalin were also determined. Soil samples were collected in triplicate by soil horizons in three conditions: i- at desertified soil (P1) - Itacuruba (PE); ii- at process of desertification (P2) - Itacuruba (PE) and iii- at preserved secondary Caatinga (P3) -Serra Talhada (PE). We used a multivariate planning analysis to evaluate the influence of chemical, physical and microbiological attributes of Luvisols under desertification levels. In addition to reducing the dimensionality of the data and identifying microbiological indicators of soil quality that responded significantly to desertification, a multivariate analysis was used. 16S rRNA (bacteria), 18S rRNA (fungi), nifH (biological nitrogen fixation), amoA (oxidizing ammonium bacteria - AOB) and phoD (phosphorus solubilization) genes abundance were subjected to variance analysis (One-way ANOVA) and the means compared by Tukey test (p<0.05), as well as for C-BMS, N-BMS, P-BMS, basal respiration, alkaline phosphatase, urease, glomalin and all other soil chemical and physical variables. Desertification almost completely compromised the biological, chemical and physical attributes of Luvisols, this resulted in significant losses in carbon, and nitrogen stocks, especially in the A surface horizon. However, we found that soil depth also influences on soil attributes, so it was not possible to define whether it is the horizon or depth that defines the role of the microbiota. Both the level of desertification and the pedogenetic horizon modeled the structure of microbial communities, however some community overlaps were identified. In the preserved Caatinga condition it was possible to observe a segregation between the superficial and subsurface soil, while in the desertified soil a narrowing of the microbial community was registered. In soil under desertification, depending on the gene evaluated, sometimes resembles the reference, sometimes with the desertified. A large impact on soil carbon stock was highlighted, showing significant reductions that exceed 60% of the amount stored in the studied Luvisols. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-10-23T14:57:00Z |
dc.date.issued.fl_str_mv |
2019-08-23 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
SANTOS, Tiago de Oliveira. Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil. 2019. 116 f. Tese (Programa de Pós-Graduação em Ciência do Solo) - Universidade Federal Rural de Pernambuco, Recife. |
dc.identifier.uri.fl_str_mv |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8297 |
identifier_str_mv |
SANTOS, Tiago de Oliveira. Comunidades microbianas e estoque de carbono e nitrogênio em luvissolo crômico sob diferentes níveis de degradação no semiárido do Brasil. 2019. 116 f. Tese (Programa de Pós-Graduação em Ciência do Solo) - Universidade Federal Rural de Pernambuco, Recife. |
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http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8297 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Federal Rural de Pernambuco |
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Programa de Pós-Graduação em Ciência do Solo |
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UFRPE |
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Brasil |
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Departamento de Agronomia |
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Universidade Federal Rural de Pernambuco |
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MD5 MD5 |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações da UFRPE - Universidade Federal Rural de Pernambuco (UFRPE) |
repository.mail.fl_str_mv |
bdtd@ufrpe.br ||bdtd@ufrpe.br |
_version_ |
1810102261943107584 |