Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass
This paper estimates the difference in stand biomass due to shorter and lighter trees in southwest (SW) and southern Amazonia (SA) compared to trees in dense forests in central Amazonia (CA). Forest biomass values used to estimate carbon emissions from deforestation throughout, Brazilian Amazonia wi...
| Autor principal: | Nogueira, Euler Melo |
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| Outros Autores: | Nelson, Bruce Walker, Fearnside, Philip Martin, França, Mabiane Batista, Oliveira, Átila Cristina Alves de |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Forest Ecology and Management
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18571 |
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oai:repositorio:1-18571 |
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oai:repositorio:1-18571 Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass Nogueira, Euler Melo Nelson, Bruce Walker Fearnside, Philip Martin França, Mabiane Batista Oliveira, Átila Cristina Alves de Biomass Carbon Global Warming Greenhouse Gases Dense Forests Greenhouse-gas Emissions Tropical Forests Forestry Allometry Bamboo Carbon Emission Clearcutting Comparative Study Deforestation Diameter Dominance Environmental Disturbance Global Warming Greenhouse Gas Height Phytomass Tropical Forest Biomass Tree Dimensions Wood Density Amazonas Brasil South America Bambusa This paper estimates the difference in stand biomass due to shorter and lighter trees in southwest (SW) and southern Amazonia (SA) compared to trees in dense forests in central Amazonia (CA). Forest biomass values used to estimate carbon emissions from deforestation throughout, Brazilian Amazonia will be affected by any differences between CA forests and those in the "arc of deforestation" where clearing activity is concentrated along the southern edge of the Amazon forest. At 12 sites (in the Brazilian states of Amazonas, Acre, Mato Grosso and Pará) 763 trees were felled and measurements were made of total height and of stem diameter. In CA dense forest, trees are taller at any given diameter than those in SW bamboo-dominated open, SW bamboo-free dense forest and SA open forests. Compared to CA, the three forest types in the arc of deforestation occur on more fertile soils, experience a longer dry season and/or are disturbed by climbing bamboos that cause frequent crown damage. Observed relationships between diameter and height were consistent with the argument that allometric scaling exponents vary in forests on different substrates or with different levels of natural disturbance. Using biomass equations based only on diameter, the reductions in stand biomass due to shorter tree height alone were 11.0, 6.2 and 3.6%, respectively, in the three forest types in the arc of deforestation. A prior study had shown these forest types to have less dense wood than CA dense forest. When tree height and wood density effects were considered jointly, total downward corrections to estimates of stand biomass were 39, 22 and 16%, respectively. Downward corrections to biomass in these forests were 76 Mg ha-1 (∼21.5 Mg ha-1 from the height effect alone), 65 Mg ha-1 (18.5 Mg ha-1 from height), and 45 Mg. ha-1 (10.3 Mg ha-1 from height). Hence, biomass stock and carbon emissions are overestimated when allometric relationships from dense forest are applied to SW or SA forest types. Biomass and emissions estimates in Brazil's National Communication under the United Nations Framework Convention on Climate Change require downward corrections for both wood density and tree height. © 2008 Elsevier B.V. All rights reserved. 2020-06-15T22:02:08Z 2020-06-15T22:02:08Z 2008 Artigo https://repositorio.inpa.gov.br/handle/1/18571 10.1016/j.foreco.2008.02.002 en Volume 255, Número 7, Pags. 2963-2972 Restrito Forest Ecology and Management |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Biomass Carbon Global Warming Greenhouse Gases Dense Forests Greenhouse-gas Emissions Tropical Forests Forestry Allometry Bamboo Carbon Emission Clearcutting Comparative Study Deforestation Diameter Dominance Environmental Disturbance Global Warming Greenhouse Gas Height Phytomass Tropical Forest Biomass Tree Dimensions Wood Density Amazonas Brasil South America Bambusa |
| spellingShingle |
Biomass Carbon Global Warming Greenhouse Gases Dense Forests Greenhouse-gas Emissions Tropical Forests Forestry Allometry Bamboo Carbon Emission Clearcutting Comparative Study Deforestation Diameter Dominance Environmental Disturbance Global Warming Greenhouse Gas Height Phytomass Tropical Forest Biomass Tree Dimensions Wood Density Amazonas Brasil South America Bambusa Nogueira, Euler Melo Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| topic_facet |
Biomass Carbon Global Warming Greenhouse Gases Dense Forests Greenhouse-gas Emissions Tropical Forests Forestry Allometry Bamboo Carbon Emission Clearcutting Comparative Study Deforestation Diameter Dominance Environmental Disturbance Global Warming Greenhouse Gas Height Phytomass Tropical Forest Biomass Tree Dimensions Wood Density Amazonas Brasil South America Bambusa |
| description |
This paper estimates the difference in stand biomass due to shorter and lighter trees in southwest (SW) and southern Amazonia (SA) compared to trees in dense forests in central Amazonia (CA). Forest biomass values used to estimate carbon emissions from deforestation throughout, Brazilian Amazonia will be affected by any differences between CA forests and those in the "arc of deforestation" where clearing activity is concentrated along the southern edge of the Amazon forest. At 12 sites (in the Brazilian states of Amazonas, Acre, Mato Grosso and Pará) 763 trees were felled and measurements were made of total height and of stem diameter. In CA dense forest, trees are taller at any given diameter than those in SW bamboo-dominated open, SW bamboo-free dense forest and SA open forests. Compared to CA, the three forest types in the arc of deforestation occur on more fertile soils, experience a longer dry season and/or are disturbed by climbing bamboos that cause frequent crown damage. Observed relationships between diameter and height were consistent with the argument that allometric scaling exponents vary in forests on different substrates or with different levels of natural disturbance. Using biomass equations based only on diameter, the reductions in stand biomass due to shorter tree height alone were 11.0, 6.2 and 3.6%, respectively, in the three forest types in the arc of deforestation. A prior study had shown these forest types to have less dense wood than CA dense forest. When tree height and wood density effects were considered jointly, total downward corrections to estimates of stand biomass were 39, 22 and 16%, respectively. Downward corrections to biomass in these forests were 76 Mg ha-1 (∼21.5 Mg ha-1 from the height effect alone), 65 Mg ha-1 (18.5 Mg ha-1 from height), and 45 Mg. ha-1 (10.3 Mg ha-1 from height). Hence, biomass stock and carbon emissions are overestimated when allometric relationships from dense forest are applied to SW or SA forest types. Biomass and emissions estimates in Brazil's National Communication under the United Nations Framework Convention on Climate Change require downward corrections for both wood density and tree height. © 2008 Elsevier B.V. All rights reserved. |
| format |
Artigo |
| author |
Nogueira, Euler Melo |
| author2 |
Nelson, Bruce Walker Fearnside, Philip Martin França, Mabiane Batista Oliveira, Átila Cristina Alves de |
| author2Str |
Nelson, Bruce Walker Fearnside, Philip Martin França, Mabiane Batista Oliveira, Átila Cristina Alves de |
| title |
Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| title_short |
Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| title_full |
Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| title_fullStr |
Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| title_full_unstemmed |
Tree height in Brazil's 'arc of deforestation': Shorter trees in south and southwest Amazonia imply lower biomass |
| title_sort |
tree height in brazil's 'arc of deforestation': shorter trees in south and southwest amazonia imply lower biomass |
| publisher |
Forest Ecology and Management |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18571 |
| _version_ |
1787143195237285888 |
| score |
11.653393 |