Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers.
Geochemically, Amazonian Dark Earths are characterised by a high fertility caused by stable soil organic matter and high nutrient levels. The nutrient stocks and nutrient forms have been intensively investigated in the last decades. Only a few studies about the origin of nutrients have been carried out. Up to now, bones have been identified as one source of nutrients in Amazonian Dark Earths but other sources, e.g. plant biomass and faecal material, are still a matter of speculation. We will discuss possible nutrient sources and associated land-use practices, and will present the first data from analyses of stanols and bile acids. These biomarkers are used to investigate the input of faecal material to soils. Our data show that excrements contribute to the fertility of Amazonian Dark Earths. Analytical procedures and the applicability of this method, which as far as we know has not been used before in the humid tropics, will be discussed.
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2008
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Subjects: | Origem, Marcador Molecular, Amazonia, terra preta, |
Online Access: | http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/683916 |
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dig-infoteca-e-doc-6839162018-08-17T00:10:28Z Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. BIRK, J. TEIXEIRA, W. NEVES, E. G. GLASER, B. Jago Birk, University of Bayreuth; WENCESLAU GERALDES TEIXEIRA, CPAA; Eduardo Neves, USP; Bruno Glaser, University of Bayreuth. Origem Marcador Molecular Amazonia terra preta Geochemically, Amazonian Dark Earths are characterised by a high fertility caused by stable soil organic matter and high nutrient levels. The nutrient stocks and nutrient forms have been intensively investigated in the last decades. Only a few studies about the origin of nutrients have been carried out. Up to now, bones have been identified as one source of nutrients in Amazonian Dark Earths but other sources, e.g. plant biomass and faecal material, are still a matter of speculation. We will discuss possible nutrient sources and associated land-use practices, and will present the first data from analyses of stanols and bile acids. These biomarkers are used to investigate the input of faecal material to soils. Our data show that excrements contribute to the fertility of Amazonian Dark Earths. Analytical procedures and the applicability of this method, which as far as we know has not been used before in the humid tropics, will be discussed. 2018-08-17T00:10:22Z 2018-08-17T00:10:22Z 2008-12-18 2008 2018-08-17T00:10:22Z Separatas In: WORLD ARCHAEOLOGICAL CONGRESS, 6., 2008, Dublin Ireland. Geoarchaeology and dark earths. Doublin: WAC-6, 2008. http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/683916 en eng openAccess |
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Origem Marcador Molecular Amazonia terra preta Origem Marcador Molecular Amazonia terra preta BIRK, J. TEIXEIRA, W. NEVES, E. G. GLASER, B. Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
description |
Geochemically, Amazonian Dark Earths are characterised by a high fertility caused by stable soil organic matter and high nutrient levels. The nutrient stocks and nutrient forms have been intensively investigated in the last decades. Only a few studies about the origin of nutrients have been carried out. Up to now, bones have been identified as one source of nutrients in Amazonian Dark Earths but other sources, e.g. plant biomass and faecal material, are still a matter of speculation. We will discuss possible nutrient sources and associated land-use practices, and will present the first data from analyses of stanols and bile acids. These biomarkers are used to investigate the input of faecal material to soils. Our data show that excrements contribute to the fertility of Amazonian Dark Earths. Analytical procedures and the applicability of this method, which as far as we know has not been used before in the humid tropics, will be discussed. |
author2 |
Jago Birk, University of Bayreuth; WENCESLAU GERALDES TEIXEIRA, CPAA; Eduardo Neves, USP; Bruno Glaser, University of Bayreuth. |
author_facet |
Jago Birk, University of Bayreuth; WENCESLAU GERALDES TEIXEIRA, CPAA; Eduardo Neves, USP; Bruno Glaser, University of Bayreuth. BIRK, J. TEIXEIRA, W. NEVES, E. G. GLASER, B. |
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Separatas |
topic_facet |
Origem Marcador Molecular Amazonia terra preta |
author |
BIRK, J. TEIXEIRA, W. NEVES, E. G. GLASER, B. |
author_sort |
BIRK, J. |
title |
Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
title_short |
Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
title_full |
Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
title_fullStr |
Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
title_full_unstemmed |
Origin of nutrients in Amazonian Dark Earths as assessed by molecular markers. |
title_sort |
origin of nutrients in amazonian dark earths as assessed by molecular markers. |
publishDate |
2008 |
url |
http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/683916 |
work_keys_str_mv |
AT birkj originofnutrientsinamazoniandarkearthsasassessedbymolecularmarkers AT teixeiraw originofnutrientsinamazoniandarkearthsasassessedbymolecularmarkers AT neveseg originofnutrientsinamazoniandarkearthsasassessedbymolecularmarkers AT glaserb originofnutrientsinamazoniandarkearthsasassessedbymolecularmarkers |
_version_ |
1779389543994097664 |