Corrigendum to “Vegetation dynamics during the late Pleistocene in the Barreirinhas region, Maranhão State, northeastern Brazil, based on carbon isotopes in soil organic matter” [Quaternary Research 62 (2004) 183–193]

AbstractCarbon isotopes of soil organic matter (SOM) were used to evaluate and establish the chronology of the vegetation dynamics of an ecosystem presently composed of savannas surrounded by forests. The study was carried out on a 200-km transect along highway BR 319, on the border of Amazonas and Rondônia states, in southern Amazon, Brazil. Large ranges in δ13C values were observed in SOM collected from profiles in the savanna (−27 to −14‰) and forest regions (−26 to −19‰), reflecting changing distribution of 13C-depleted C3 forest and 13C-enriched C4 savanna vegetation in response to climate change. These results indicate that from about 17,000 to 9000 14C yr B.P., the study area was covered by forest vegetation. Between approximately 9000 and 3000 14C yr B.P., savanna vegetation expanded at the expense of the forest. Although the expansion of savanna did not occur with the same intensity along the study transect, this process was very clearly registered by 13C-enrichment in the SOM. Since 3000 14C yr B.P., the carbon isotope data suggest that forested regions have expanded. This study adds to the mounting evidence that extensive forested areas existed in the Amazon during the last glaciation and that savanna vegetation expanded in response to warm and dry conditions during the early to middle Holocene.

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Vegetation dynamics during the late Pleistocene in the Barreirinhas region, Maranhão State, northeastern Brazil, based on carbon Isotopes in soil organic matter

Quaternary Research ◽

10.1016/j.yqres.2004.06.003 ◽

2004 ◽

Vol 62 (2) ◽

pp. 183-193 ◽

Cited By ~ 63

Author(s):

Luiz Carlos Ruiz Pessenda ◽

Adauto de Souza Ribeiro ◽

Susy Eli Marques Gouveia ◽

Ramon Aravena ◽

Rene Boulet ◽

...

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Late Pleistocene ◽

Isotope Analysis ◽

Data Interpretation ◽

Climatic Conditions ◽

Northeastern Brazil ◽

Coastal Vegetation ◽

Humid Climate ◽

Vegetation Dynamic

The study place is in the Barreirinhas region, Maranhão State, northeastern Brazil. A vegetation transect of 78 km was studied among four vegetation types: Restinga (coastal vegetation), Cerrado (woody savanna), Cerrad"o (dense woody savanna), and Forest, as well as three forested sites around Lagoa do Caçó, located approximately 10 km of the transect. Soil profiles in this transect were sampled for δ13C analysis, as well as buried charcoal fragments were used for 14C dating. The data interpretation indicated that approximately between 15,000 and ∽9000 14C yr B.P., arboreal vegetation prevailed in the whole transect, probably due to the presence of a humid climate. Approximately between ∽9000 and 4000–3000 14C yr B.P., there was the expansion of the savanna, probably related to the presence of drier climate. From ∽4000–3000 14C yr B.P. to the present, the results indicated an increase in the arboreal density in the area, due to the return to a more humid and probably similar climate to the present. The presence of buried charcoal fragments in several soil depths suggested the occurrence of palaeofires during the Holocene. The vegetation dynamic inferred in this study for northeastern Brazil is in agreement with the results obtained in areas of Amazon region, based on pollen analysis of lake sediments and carbon isotope analysis of soil organic matter (SOM), implying than similar climatic conditions have affected these areas during the late Pleistocene until the present.

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VEGETATION CHANGES DURING THE QUATERNARY INFERRED FROM CARBON ISOTOPES ANALYSES ON CHARCOAL AND SOIL ORGANIC MATTER, STATE OF SÃO PAULO, SOUTHEAST BRAZIL

Isotope Production and Applications in the 21st Century ◽

10.1142/9789812793867_0059 ◽

2000 ◽

Author(s):

L. C. R. PESSENDA ◽

S. E. M. GOUVEIA ◽

R. BOULET ◽

R. ARAVENA ◽

R. SCHEEL-YBERT

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Carbon Isotopes ◽

Sao Paulo ◽

Vegetation Changes ◽

São Paulo ◽

Southeast Brazil

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Soybean expansion impacts on soil organic matter in the eastern region of the Maranhão state (Northeastern Brazil)

Soil Use and Management ◽

10.1111/sum.12785 ◽

2022 ◽

Author(s):

Marcos Siqueira‐Neto ◽

Gustavo V. Popin ◽

Gregori E. Ferrão ◽

Arthur K. B. Santos ◽

Carlos E. P. Cerri ◽

...

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Northeastern Brazil ◽

Eastern Region

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Problems in Radiocarbon Dating of Soils

Radiocarbon ◽

10.1017/s0033822200060355 ◽

1993 ◽

Vol 35 (3) ◽

pp. 351-362 ◽

Cited By ~ 28

Author(s):

O. A. Chichagova ◽

A. E. Cherkinsky

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Carbon Cycle ◽

Carbon Cycling ◽

Late Pleistocene ◽

Radiocarbon Dating ◽

Formation Rate ◽

Humus Formation ◽

New Methods ◽

Holocene Sediments

We discuss our progress in three principal applications of 14C dating of recent and fossil soils: 1) new methods; 2) problems of interpreting 14C soil data (e.g.,14C age of soils, age of soils, duration of humus formation, rate of carbon cycling); and 3) 14C analysis of soil organic matter (OM) in pedology and paleogeography (e.g., soil genesis and evolution, humus formation and OM metamorphosis, geochronology and stratigraphy of Late Pleistocene and Holocene sediments). We suggest exploring the above issues in the analysis of each 14C profile in conjunction with paleogeographical data, and by simulation of the carbon cycle in each type of profile.

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