Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon
Here we hypothesize that the intensity of disturbances caused by human activities in Brazil nut stands (castanhais) is positively related with the regeneration of Brazil nut trees (Bertholletia excelsa H. B. K., Lecythidaceae) and consequently with a younger population structure of this species. In...
| Autor principal: | Scoles, Ricardo |
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| Outros Autores: | Gribel, Rogério |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Human Ecology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18164 |
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oai:repositorio:1-18164 |
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oai:repositorio:1-18164 Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon Scoles, Ricardo Gribel, Rogério Archaeological Evidence Colonization Disturbance Historical Perspective Human Activity Hypothesis Testing Land-use Change Nut Population Structure Recruitment (population Dynamics) Regeneration Stand Dynamics Stand Structure Understory Amazonas Brasil Madeira River Bertholletia Excelsa Lecythidaceae Here we hypothesize that the intensity of disturbances caused by human activities in Brazil nut stands (castanhais) is positively related with the regeneration of Brazil nut trees (Bertholletia excelsa H. B. K., Lecythidaceae) and consequently with a younger population structure of this species. In order to test this hypothesis we compared the population structure of Brazil nut trees in two areas of the Brazilian Amazon with different histories of land usage by humans. Archeological and historical data suggest that the region surrounding the Trombetas River was densely occupied in pre-Columbian times and experienced depopulation after European contact with Amerindian populations, especially in the 16th century. The 25 Brazil nut stands sampled in this region were dominated by old B. excelsa trees and had scarce recruitment in the understory. These very mature stands likely owe their origins to the interval between the depopulation of the indigenous peoples in the 16th-17th centuries and the establishment of quilombos at the beginning of the 19th century. The second study area was in the vicinity of the Madeira River (Capanã Grande Lake), where the castanhais were more accessible and disturbed. In this site, a younger population structure and abundant regeneration of B. excelsa were observed in the 10 sampled stands. Historical data from this region indicate that indigenous populations were replaced gradually beginning in the 18th century, with no evidence of severe depopulation. We suggest that the different historical and contemporary land use patterns contributed to the current contrasting population structures of the castanhais at the two locations. The data also support the idea that the castanhais, even the ones considered to be pristine and "native" forests, result from anthropogenic influences. We found no evidence to support restrictions on seed harvesting as a means to improve regeneration rates of Brazil nut stands. © 2011 Springer Science+Business Media, LLC. 2020-06-15T21:52:12Z 2020-06-15T21:52:12Z 2011 Artigo https://repositorio.inpa.gov.br/handle/1/18164 10.1007/s10745-011-9412-0 en Volume 39, Número 4, Pags. 455-464 Restrito Human Ecology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Archaeological Evidence Colonization Disturbance Historical Perspective Human Activity Hypothesis Testing Land-use Change Nut Population Structure Recruitment (population Dynamics) Regeneration Stand Dynamics Stand Structure Understory Amazonas Brasil Madeira River Bertholletia Excelsa Lecythidaceae |
| spellingShingle |
Archaeological Evidence Colonization Disturbance Historical Perspective Human Activity Hypothesis Testing Land-use Change Nut Population Structure Recruitment (population Dynamics) Regeneration Stand Dynamics Stand Structure Understory Amazonas Brasil Madeira River Bertholletia Excelsa Lecythidaceae Scoles, Ricardo Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| topic_facet |
Archaeological Evidence Colonization Disturbance Historical Perspective Human Activity Hypothesis Testing Land-use Change Nut Population Structure Recruitment (population Dynamics) Regeneration Stand Dynamics Stand Structure Understory Amazonas Brasil Madeira River Bertholletia Excelsa Lecythidaceae |
| description |
Here we hypothesize that the intensity of disturbances caused by human activities in Brazil nut stands (castanhais) is positively related with the regeneration of Brazil nut trees (Bertholletia excelsa H. B. K., Lecythidaceae) and consequently with a younger population structure of this species. In order to test this hypothesis we compared the population structure of Brazil nut trees in two areas of the Brazilian Amazon with different histories of land usage by humans. Archeological and historical data suggest that the region surrounding the Trombetas River was densely occupied in pre-Columbian times and experienced depopulation after European contact with Amerindian populations, especially in the 16th century. The 25 Brazil nut stands sampled in this region were dominated by old B. excelsa trees and had scarce recruitment in the understory. These very mature stands likely owe their origins to the interval between the depopulation of the indigenous peoples in the 16th-17th centuries and the establishment of quilombos at the beginning of the 19th century. The second study area was in the vicinity of the Madeira River (Capanã Grande Lake), where the castanhais were more accessible and disturbed. In this site, a younger population structure and abundant regeneration of B. excelsa were observed in the 10 sampled stands. Historical data from this region indicate that indigenous populations were replaced gradually beginning in the 18th century, with no evidence of severe depopulation. We suggest that the different historical and contemporary land use patterns contributed to the current contrasting population structures of the castanhais at the two locations. The data also support the idea that the castanhais, even the ones considered to be pristine and "native" forests, result from anthropogenic influences. We found no evidence to support restrictions on seed harvesting as a means to improve regeneration rates of Brazil nut stands. © 2011 Springer Science+Business Media, LLC. |
| format |
Artigo |
| author |
Scoles, Ricardo |
| author2 |
Gribel, Rogério |
| author2Str |
Gribel, Rogério |
| title |
Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| title_short |
Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| title_full |
Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| title_fullStr |
Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| title_full_unstemmed |
Population Structure of Brazil Nut (Bertholletia excelsa, Lecythidaceae) Stands in Two Areas with Different Occupation Histories in the Brazilian Amazon |
| title_sort |
population structure of brazil nut (bertholletia excelsa, lecythidaceae) stands in two areas with different occupation histories in the brazilian amazon |
| publisher |
Human Ecology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18164 |
| _version_ |
1787144353583464448 |
| score |
11.755432 |