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dc.contributor.authorLucas, Yves-
dc.contributor.authorLuizão, Flávio Jesus-
dc.contributor.authorChauvel, Armand-
dc.contributor.authorRouiller, James Henri-
dc.contributor.authorNahon, Daniel B.-
dc.date.accessioned2020-06-15T22:09:19Z-
dc.date.available2020-06-15T22:09:19Z-
dc.date.issued1993-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/19508-
dc.description.abstractIn most soils of the humid tropics, kaolinitic topsoil horizons overlie more gibbsitic horizons. This arrangement cannot be produced simply by leaching. Quantitative measurement of the turnover of chemical elements in the litterfall in an Amazonian ecosystem indicates that the forest cycles a significant amount of elements, particularly silicon. As a result, fluids that percolate through topsoil horizons already contain dissolved silicon. This effect keeps silicon from being leached down and may account for the stability of kaolinite in the soil upper horizons. The soil mineral composition is thus maintained by biological activity.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 260, Número 5107, Pags. 521-523pt_BR
dc.rightsRestrito*
dc.subjectAnalytical Geochemistryen
dc.subjectCompositionen
dc.subjectSoil Surveysen
dc.subjectTropical Engineeringen
dc.subjectGeochemical Cyclingen
dc.subjectGibbsiteen
dc.subjectKaolinitic Topsoilsen
dc.subjectAcid Rainen
dc.subjectElement Cyclingen
dc.subjectMineral Compositionen
dc.subjectRainforest Soilen
dc.subjectSiliconen
dc.subjectSoil Biological Activityen
dc.subjectBrazil, Amazon Basinen
dc.titleThe relation between biological activity of the rain forest and mineral composition of soilsen
dc.typeArtigopt_BR
dc.identifier.doi10.1126/science.260.5107.521-
dc.publisher.journalSciencept_BR
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