Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon
Changes in above-ground biomass (AGB) of 17 1 ha logged plots of terra firme rain forest in the eastern Amazon (Brazil, Paragominas) weremonitored for four years (2004-2008) after reduced-impact logging. Over the same time period, we also monitored two 0.5 ha plots in adjacent unlogged forest. While AGB in the control plots changed little over the observation period (increased on average 1.4 Mg ha_1), logging resulted in immediate reductions in ABG that averaged 94.5 Mg ha_1 (_42.0), which represented 23% of the 410 Mg ha_1 (_64.9) present just prior to harvesting. Felled trees (dbh > 55 cm) accounted for 73% (_15) of these immediate losses but only 18.9 Mg ha_1 (_8.1) of biomass was removed in the extracted logs. During the first year after logging, the annual AGB balance (annual AGB gain by recruitment and growth _ annual AGB loss by mortality) remained negative (_31.1 Mg ha_1 year_1; _16.7), mainly due to continued high mortality rates of damaged trees. During the following three years (2005-2008), average net AGB accumulation in the logged plots was 2.6 Mg ha_1 year_1 (_4.6). Post-logging biomass recovery was mostly through growth (4.3 _ 1.5 Mg ha_1 year_1 for 2004-2005 and 6.8 _ 0.9 Mg ha_1 year_1 for 2005-2008), particularly of large trees. In contrast, tree recruitment contributed little to the observed increases in AGB (1.1 _ 0.6 Mg ha_1 year_1 for 2004-2005 and 3.1 _ 1.3 Mg ha_1 year_1 for 2005-2008). Plots with the lowest residual basal area after logging generally continued to lose more large trees (dbh _70 cm), and consequently showed the greatest AGB losses and the slowest overall AGB gains. If 100% AGB recovery is desired and the 30-year minimum cutting cycle defined by Brazilian law is adhered to, current logging intensities (6 trees ha_1) need to be reduced by 40-50%. Such a reduction in logging intensity will reduce financial incomes to loggers, but might be compensated for by the payment of environmental services through the proposed REDD (reduced emissions from deforestation and forest degradation) mechanism of the United Nations Framework Convention on Climate Change.
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Subjects: | K10 - Production forestière, P01 - Conservation de la nature et ressources foncières, forêt tropicale humide, aménagement forestier, biomasse, sylviculture, régénération naturelle, production forestière, gestion des ressources, dégradation, déboisement, http://aims.fao.org/aos/agrovoc/c_7976, http://aims.fao.org/aos/agrovoc/c_16129, http://aims.fao.org/aos/agrovoc/c_926, http://aims.fao.org/aos/agrovoc/c_7071, http://aims.fao.org/aos/agrovoc/c_5090, http://aims.fao.org/aos/agrovoc/c_3061, http://aims.fao.org/aos/agrovoc/c_6524, http://aims.fao.org/aos/agrovoc/c_2159, http://aims.fao.org/aos/agrovoc/c_15590, http://aims.fao.org/aos/agrovoc/c_5556, http://aims.fao.org/aos/agrovoc/c_32372, |
Online Access: | http://agritrop.cirad.fr/552786/ http://agritrop.cirad.fr/552786/1/document_552786.pdf |
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K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 |
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K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 Mazzei, Lucas Sist, Plinio Ruschel, Ademir R. Putz, Francis E. Marco, Phidias Pena, Wagner Ribeiro Ferreira, Josué Avandro Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
description |
Changes in above-ground biomass (AGB) of 17 1 ha logged plots of terra firme rain forest in the eastern Amazon (Brazil, Paragominas) weremonitored for four years (2004-2008) after reduced-impact logging. Over the same time period, we also monitored two 0.5 ha plots in adjacent unlogged forest. While AGB in the control plots changed little over the observation period (increased on average 1.4 Mg ha_1), logging resulted in immediate reductions in ABG that averaged 94.5 Mg ha_1 (_42.0), which represented 23% of the 410 Mg ha_1 (_64.9) present just prior to harvesting. Felled trees (dbh > 55 cm) accounted for 73% (_15) of these immediate losses but only 18.9 Mg ha_1 (_8.1) of biomass was removed in the extracted logs. During the first year after logging, the annual AGB balance (annual AGB gain by recruitment and growth _ annual AGB loss by mortality) remained negative (_31.1 Mg ha_1 year_1; _16.7), mainly due to continued high mortality rates of damaged trees. During the following three years (2005-2008), average net AGB accumulation in the logged plots was 2.6 Mg ha_1 year_1 (_4.6). Post-logging biomass recovery was mostly through growth (4.3 _ 1.5 Mg ha_1 year_1 for 2004-2005 and 6.8 _ 0.9 Mg ha_1 year_1 for 2005-2008), particularly of large trees. In contrast, tree recruitment contributed little to the observed increases in AGB (1.1 _ 0.6 Mg ha_1 year_1 for 2004-2005 and 3.1 _ 1.3 Mg ha_1 year_1 for 2005-2008). Plots with the lowest residual basal area after logging generally continued to lose more large trees (dbh _70 cm), and consequently showed the greatest AGB losses and the slowest overall AGB gains. If 100% AGB recovery is desired and the 30-year minimum cutting cycle defined by Brazilian law is adhered to, current logging intensities (6 trees ha_1) need to be reduced by 40-50%. Such a reduction in logging intensity will reduce financial incomes to loggers, but might be compensated for by the payment of environmental services through the proposed REDD (reduced emissions from deforestation and forest degradation) mechanism of the United Nations Framework Convention on Climate Change. |
format |
article |
topic_facet |
K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 |
author |
Mazzei, Lucas Sist, Plinio Ruschel, Ademir R. Putz, Francis E. Marco, Phidias Pena, Wagner Ribeiro Ferreira, Josué Avandro |
author_facet |
Mazzei, Lucas Sist, Plinio Ruschel, Ademir R. Putz, Francis E. Marco, Phidias Pena, Wagner Ribeiro Ferreira, Josué Avandro |
author_sort |
Mazzei, Lucas |
title |
Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
title_short |
Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
title_full |
Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
title_fullStr |
Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
title_full_unstemmed |
Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon |
title_sort |
above-ground biomass dynamics after reduced-impact logging in the eastern amazon |
url |
http://agritrop.cirad.fr/552786/ http://agritrop.cirad.fr/552786/1/document_552786.pdf |
work_keys_str_mv |
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1792497449666871296 |
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dig-cirad-fr-5527862024-01-28T17:54:46Z http://agritrop.cirad.fr/552786/ http://agritrop.cirad.fr/552786/ Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon. Mazzei Lucas, Sist Plinio, Ruschel Ademir R., Putz Francis E., Marco Phidias, Pena Wagner, Ribeiro Ferreira Josué Avandro. 2010. Forest Ecology and Management, 259 (3) : 367-373.https://doi.org/10.1016/j.foreco.2009.10.031 <https://doi.org/10.1016/j.foreco.2009.10.031> Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon Mazzei, Lucas Sist, Plinio Ruschel, Ademir R. Putz, Francis E. Marco, Phidias Pena, Wagner Ribeiro Ferreira, Josué Avandro eng 2010 Forest Ecology and Management K10 - Production forestière P01 - Conservation de la nature et ressources foncières forêt tropicale humide aménagement forestier biomasse sylviculture régénération naturelle production forestière gestion des ressources dégradation déboisement http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7071 http://aims.fao.org/aos/agrovoc/c_5090 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_6524 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_15590 Para Amazonie http://aims.fao.org/aos/agrovoc/c_5556 http://aims.fao.org/aos/agrovoc/c_32372 Changes in above-ground biomass (AGB) of 17 1 ha logged plots of terra firme rain forest in the eastern Amazon (Brazil, Paragominas) weremonitored for four years (2004-2008) after reduced-impact logging. Over the same time period, we also monitored two 0.5 ha plots in adjacent unlogged forest. While AGB in the control plots changed little over the observation period (increased on average 1.4 Mg ha_1), logging resulted in immediate reductions in ABG that averaged 94.5 Mg ha_1 (_42.0), which represented 23% of the 410 Mg ha_1 (_64.9) present just prior to harvesting. Felled trees (dbh > 55 cm) accounted for 73% (_15) of these immediate losses but only 18.9 Mg ha_1 (_8.1) of biomass was removed in the extracted logs. During the first year after logging, the annual AGB balance (annual AGB gain by recruitment and growth _ annual AGB loss by mortality) remained negative (_31.1 Mg ha_1 year_1; _16.7), mainly due to continued high mortality rates of damaged trees. During the following three years (2005-2008), average net AGB accumulation in the logged plots was 2.6 Mg ha_1 year_1 (_4.6). Post-logging biomass recovery was mostly through growth (4.3 _ 1.5 Mg ha_1 year_1 for 2004-2005 and 6.8 _ 0.9 Mg ha_1 year_1 for 2005-2008), particularly of large trees. In contrast, tree recruitment contributed little to the observed increases in AGB (1.1 _ 0.6 Mg ha_1 year_1 for 2004-2005 and 3.1 _ 1.3 Mg ha_1 year_1 for 2005-2008). Plots with the lowest residual basal area after logging generally continued to lose more large trees (dbh _70 cm), and consequently showed the greatest AGB losses and the slowest overall AGB gains. If 100% AGB recovery is desired and the 30-year minimum cutting cycle defined by Brazilian law is adhered to, current logging intensities (6 trees ha_1) need to be reduced by 40-50%. Such a reduction in logging intensity will reduce financial incomes to loggers, but might be compensated for by the payment of environmental services through the proposed REDD (reduced emissions from deforestation and forest degradation) mechanism of the United Nations Framework Convention on Climate Change. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/552786/1/document_552786.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.foreco.2009.10.031 10.1016/j.foreco.2009.10.031 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=206781 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2009.10.031 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.foreco.2009.10.031 |