Biblioteca Digital de VanguardiaBioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil
Pedologists generally pay less attention to bioturbation than other soil-forming processes since morphological descriptions and/or soil analytical methods often exclude the characterization of biogenic structures. For example, bioaggregates are not even considered in the Brazilian Soil Classificatio...
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| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | Inglés |
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Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas
2020
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| Acceso en línea: | https://www.revistas.usp.br/rdg/article/view/164903 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42359 |
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| author | Diogo Filho, Geraldo José Queiroz Neto, José Pereira de |
| author_facet | Diogo Filho, Geraldo José Queiroz Neto, José Pereira de |
| author_sort | Diogo Filho, Geraldo José |
| collection | Repositorio |
| description | Pedologists generally pay less attention to bioturbation than other soil-forming processes since morphological descriptions and/or soil analytical methods often exclude the characterization of biogenic structures. For example, bioaggregates are not even considered in the Brazilian Soil Classification System. Here, we aimed to address this shortcoming by describing and analyzing biogenic features (e.g., channels, pedotubes, and casts) produced by earthworm activity in soils. Annelid structures in Brazilian Atlantic rain forest soils were collected, measured, and photographed. The bioaggregates were organized by type (cylindrical, irregular blocks) and class (very small, small, medium, large, and very large). Physical and chemical characterization of these structures was also performed, including analyses of soil texture, organic carbon, and exchangeable bases (Ca2+, Mg2+, K+, P). Some biogenic features were filled with revolved soil (i.e. krotovinas or paleoburrows), while others were not (intact channels). Redoximorphic features were very common on the channel walls and casts, likely because these biogenic pores contribute to soil O2 diffusion and CO2 removal. The casts were found to have a sandy texture and organic carbon contents were three times greater – as also exemplified by their darker color – than the surrounding soil matrix. These factors collectively suggest the efficiency with which certain ecological groups of annelids incorporate organic matter into forest soils. Earthworm casts also contained higher quantities of phosphorus, calcium, and magnesium (exchangeable bases) than the surrounding soil. Earthworms are a fundamental part of soil functioning, contributing to essential processes such as aeration, aggregation, organic matter incorporation, and fertility enhancement. Therefore, earthworms and the biogenic structures they are responsible for can be considered to strongly influence pedogenesis, especially in tropical regions. |
| format | info:eu-repo/semantics/article |
| id | clacso-CLACSO42359 |
| institution | CLACSO, Repositorio Digital |
| language | Inglés |
| publishDate | 2020 |
| publisher | Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas |
| record_format | greenstone |
| spelling | clacso-CLACSO423592022-03-17T15:14:47Z Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil Biogenic structures in soils under a primary Atlantic Rain Forest in SE-Brazil Diogo Filho, Geraldo José Queiroz Neto, José Pereira de Morphology Bioturbation Earthworms Pedogenesis Morfologia Bioturbação Minhocas Pedogênese Pedologists generally pay less attention to bioturbation than other soil-forming processes since morphological descriptions and/or soil analytical methods often exclude the characterization of biogenic structures. For example, bioaggregates are not even considered in the Brazilian Soil Classification System. Here, we aimed to address this shortcoming by describing and analyzing biogenic features (e.g., channels, pedotubes, and casts) produced by earthworm activity in soils. Annelid structures in Brazilian Atlantic rain forest soils were collected, measured, and photographed. The bioaggregates were organized by type (cylindrical, irregular blocks) and class (very small, small, medium, large, and very large). Physical and chemical characterization of these structures was also performed, including analyses of soil texture, organic carbon, and exchangeable bases (Ca2+, Mg2+, K+, P). Some biogenic features were filled with revolved soil (i.e. krotovinas or paleoburrows), while others were not (intact channels). Redoximorphic features were very common on the channel walls and casts, likely because these biogenic pores contribute to soil O2 diffusion and CO2 removal. The casts were found to have a sandy texture and organic carbon contents were three times greater – as also exemplified by their darker color – than the surrounding soil matrix. These factors collectively suggest the efficiency with which certain ecological groups of annelids incorporate organic matter into forest soils. Earthworm casts also contained higher quantities of phosphorus, calcium, and magnesium (exchangeable bases) than the surrounding soil. Earthworms are a fundamental part of soil functioning, contributing to essential processes such as aeration, aggregation, organic matter incorporation, and fertility enhancement. Therefore, earthworms and the biogenic structures they are responsible for can be considered to strongly influence pedogenesis, especially in tropical regions. As minhocas desempenham papeis importantes na formação do solo, contudo pouca atenção é dada à bioturbação pelos pedólogos. A descrição morfológica tradicional, assim como os procedimentos de caracterização física e química do solo, não contemplam as estruturas biogênicas, que nem mesmo são consideradas pelo Sistema Brasileiro de Classificação de Solos. O objetivo deste trabalho foi caracterizar as feições biogênicas como canais, câmaras e dejeções, produzidas pela atividade de minhocas no solo da Estação Biológica de Boracéia, em São Paulo. As bioestruturas foram coletadas, medidas, fotografadas e organizadas por tipo (cilíndricos e blocos irregulares) e tamanho (muito pequeno, pequeno, médio, grande e muito grande). Foram realizadas análises físicas e químicas destes materiais e do solo: granulometria, carbono orgânico, bases trocáveis (Ca2+, Mg2+, K+, P). Alguns canais biogênicos encontravam-se preenchidos por solo revolvido (as crotovinas) e outros não. As características redoximórficas são muito comuns nas paredes dos canais, porque esses dutos biogênicos contribuem para a difusão de O2 do solo e a remoção de CO2 no perfil. As dejeções têm textura arenosa, o conteúdo de carbono orgânico nelas é três vezes superior comparado ao da matriz do solo, indicando a eficiência de certos grupos ecológicos de anelídeos na incorporação de matéria orgânica em subsuperfície. Os coprólitos também apresentaram maiores quantidades de fósforo, cálcio e magnésio do que o solo. As minhocas cumprem funções fundamentais no solo, como aeração, agregação, incorporação de matéria orgânica e aumento de sua fertilidade. Portanto, os agregados biogênicos influenciam fortemente na pedogênese, especialmente na zona tropical. 2020-12-24 2022-03-17T15:14:47Z 2022-03-17T15:14:47Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.revistas.usp.br/rdg/article/view/164903 10.11606/rdg.v40i0.164903 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42359 eng https://www.revistas.usp.br/rdg/article/view/164903/166529 Copyright (c) 2020 Geraldo José Diogo Filho, José Pereira de Queiroz Neto http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas Revista do Departamento de Geografia; ##issue.vol## 40 (2020); 26-39 Revista do Departamento de Geografia; v. 40 (2020); 26-39 Revista do Departamento de Geografia; Vol. 40 (2020); 26-39 2236-2878 0102-4582 |
| spellingShingle | Morphology Bioturbation Earthworms Pedogenesis Morfologia Bioturbação Minhocas Pedogênese Diogo Filho, Geraldo José Queiroz Neto, José Pereira de Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title | Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title_full | Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title_fullStr | Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title_full_unstemmed | Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title_short | Bioestruturas no solo sob vegetação florestal de Mata Atlântica primária no Sudeste do Brasil |
| title_sort | bioestruturas no solo sob vegetação florestal de mata atlântica primária no sudeste do brasil |
| topic | Morphology Bioturbation Earthworms Pedogenesis Morfologia Bioturbação Minhocas Pedogênese |
| url | https://www.revistas.usp.br/rdg/article/view/164903 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42359 |