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  • 1
    Online Resource
    Online Resource
    FIRES IN BRAZILIAN AMAZON: WHY DOES POLICY HAVE A LIMITED IMPACT?
    FapUNIFESP (SciELO) ; 2017
    In:  Ambiente & Sociedade Vol. 20, No. 4 ( 2017-12), p. 19-38
    Details
    In: Ambiente & Sociedade, FapUNIFESP (SciELO), Vol. 20, No. 4 ( 2017-12), p. 19-38
    Abstract: Resumo O artigo identifica os principais fatores que limitam a eficácia de políticas públicas vigentes para reduzir queimadas e incêndios florestais na Amazônia brasileira. Entre eles, destacam-se (i) a alocação majoritária do orçamento para combate de incêndios em detrimento da prevenção, (ii) a circunscrição geográfica da atuação federal e a reduzida estrutura pública estadual, (iii) insuficiências institucionais e custos de transação referentes ao licenciamento de queimadas e, (iv) o acesso limitado a crédito, mercado consumidor, mão-de-obra e assistência técnica, restrições estas que impedem a difusão de práticas agropecuárias substitutas às queimadas. Recomenda-se que as políticas públicas sejam reestruturadas para levar em conta o custo-benefício das ações e incluir, em seu desenho e implementação, as comunidades dependentes de queimadas. É igualmente necessário o avanço em políticas socioeconômicas complementares.
    Type of Medium: Online Resource
    ISSN: 1809-4422 , 1414-753X
    URL: Article
    DOI: 10.1590/1809-4422asoc0232r1v2042017
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2017
    detail.hit.zdb_id: 2144506-0
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  • 2
    Online Resource
    Online Resource
    Data_Sheet_1.PDF
    Frontiers Media SA ; 2023
    In:  Frontiers in Forests and Global Change Vol. 6 ( 2023-2-14)
    Details
    In: Frontiers in Forests and Global Change, Frontiers Media SA, Vol. 6 ( 2023-2-14)
    Abstract: Drought and fire reduce productivity and increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists in situ for centuries to millennia, and represents a legacy of past fires, potentially improving soil fertility and water holding capacity and selecting for the survival and recruitment of certain tree life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical soil properties, wood density, aboveground carbon (AGC) dynamics and forest resistance to severe drought. To achieve our aim, we used an Amazon-wide, long-term plot network, in forests without known recent fires, integrating site-specific measures of forest dynamics, soil properties and a unique soil PyC concentration database. We found that forests with higher concentrations of soil PyC had both higher soil fertility and lower wood density. Soil PyC was not associated with AGC dynamics in non-drought years. However, during extreme drought events (10% driest years), forests with higher concentrations of soil PyC experienced lower reductions in AGC gains (woody growth and recruitment), with this drought-immunizing effect increasing with drought severity. Forests with a legacy of ancient fires are therefore more likely to continue to grow and recruit under increased drought severity. Forests with high soil PyC concentrations (third quartile) had 3.8% greater AGC gains under mean drought, but 33.7% greater under the most extreme drought than forests with low soil PyC concentrations (first quartile), offsetting losses of up to 0.68 Mg C ha –1 yr –1 of AGC under extreme drought events. This suggests that ancient fires have legacy effects on current forest dynamics, by altering soil fertility and favoring tree species capable of continued growth and recruitment during droughts. Therefore, mature forest that experienced fires centuries or millennia ago may have greater resistance to current short-term droughts.
    Type of Medium: Online Resource
    ISSN: 2624-893X
    URL: Article
    URL: Article
    DOI: 10.3389/ffgc.2023.1024101
    DOI: 10.3389/ffgc.2023.1024101.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2023
    detail.hit.zdb_id: 2968523-0
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  • 3
    Online Resource
    Online Resource
    Avifaunal inventory of a Southern Amazonian transitional forest site: the São Luiz farm, Mato Grosso, Brazil
    Boletim do Museu Paraense Emilio Goeldi ; 2011
    In:  Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais Vol. 6, No. 2 ( 2011-08-29), p. 147-161
    Details
    In: Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais, Boletim do Museu Paraense Emilio Goeldi, Vol. 6, No. 2 ( 2011-08-29), p. 147-161
    Abstract: This paper describes the avifauna sampled at the São Luiz farm, in Northern Mato Grosso State, a Southern Brazilian Amazonian forest site. The avifauna was sampled at forested and open sites, between 29 June and 27 July 2008, using point counts, mist-nets and general observations. We recorded 194 bird species within 18 orders and 46 families. The records of this study expanded the known range limits of at least 16 bird species. Despite the need for sampling in other seasons, the rarefaction curves indicate a representative sampling effort. The bird community observed at this site contains most of the species typically associated with Amazonian forests, south of the Amazon, and suggests that ‘transitional forests’ found at this site should be qualified as ‘Amazonian’ when considering their legal status. Our data highlights the importance of this anthropogenically-impacted and poorly-known region of Amazonia.
    Type of Medium: Online Resource
    ISSN: 2317-6237 , 1981-8114
    URL: Article
    DOI: 10.46357/bcnaturais.v6i2.619
    Language: Unknown
    Publisher: Boletim do Museu Paraense Emilio Goeldi
    Publication Date: 2011
    detail.hit.zdb_id: 2431406-7
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  • 4
    Online Resource
    Online Resource
    Spatio-temporal variation in dry season determines the Amazonian fire calendar
    IOP Publishing ; 2021
    In:  Environmental Research Letters Vol. 16, No. 12 ( 2021-12-01), p. 125009-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 16, No. 12 ( 2021-12-01), p. 125009-
    Abstract: Fire is one of the main anthropogenic drivers that threatens the Amazon. Despite the clear link between rainfall and fire, the spatial and temporal relationship between these variables is still poorly understood in the Amazon. Here, we stratified the Amazon basin according to the dry season onset/end and investigated its relationship with the spatio-temporal variation of fire. We used monthly time series of active fires from 2003 to 2019 to characterize the fire dynamics throughout the year and to identify the fire peak months. More than 50% (32 246) of the annual mean active fires occurred in the peak month. In 52% of the cells, the peaks occurred between August–September and in 48% between October–March, showing well-defined seasonal patterns related to spatio-temporal variation of the dry season. Fire peaks occurred in the last two months of the dry season in 67% of the cells and in 20% in the first month of the rainy season. The shorter the dry season, the more concentrated was the occurrence of active fires in the peak month, with a predominance above 70% in cells with a dry season between one and three months. We defined a Critical Fire Period by identifying the consecutive months that concentrated at least 80% of active fires in the year. This period included two to three months between January and March in the northwest, and in the far north it lasted up to seven months, ending in March–April. In the south, it varied between two and three months, starting in August. In the northeast, it was three to four months, between August and December. By quantifying the role of the dry season in driving fire seasonality across the Amazon basin, we provide recommendations to monitor fire dynamics that can support decision makers in management policies and measures to avoid environmentally or socially harmful fires.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/ac3aa3
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2255379-4
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  • 5
    Online Resource
    Online Resource
    Corrigendum: Old-growth forest loss and secondary forest recovery across Amazonian countries (2021 Environ. Res. Lett. 16 085009)
    IOP Publishing ; 2022
    In:  Environmental Research Letters Vol. 17, No. 10 ( 2022-10-01), p. 109501-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 17, No. 10 ( 2022-10-01), p. 109501-
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/ac8ca2
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2255379-4
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  • 6
    Online Resource
    Online Resource
    Drug-induced receptor occupancy: substantial differences in measurements made in vivo vs ex vivo
    Springer Science and Business Media LLC ; 2001
    In:  Psychopharmacology Vol. 157, No. 2 ( 2001-9-1), p. 168-171
    Details
    In: Psychopharmacology, Springer Science and Business Media LLC, Vol. 157, No. 2 ( 2001-9-1), p. 168-171
    Type of Medium: Online Resource
    ISSN: 0033-3158 , 1432-2072
    URL: Article
    DOI: 10.1007/s002130100790
    RVK:
    CL 1000
    Language: Unknown
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2001
    detail.hit.zdb_id: 2066933-1
    SSG: 15,3
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  • 7
    Online Resource
    Online Resource
    Old-growth forest loss and secondary forest recovery across Amazonian countries
    IOP Publishing ; 2021
    In:  Environmental Research Letters Vol. 16, No. 8 ( 2021-08-01), p. 085009-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 16, No. 8 ( 2021-08-01), p. 085009-
    Abstract: There is growing recognition of the potential of large-scale forest restoration in the Amazon as a ‘nature-based solution’ to climate change. However, our knowledge of forest loss and recovery beyond Brazil is limited, and carbon emissions and accumulation have not been estimated for the whole biome. Combining a 33 year land cover dataset with estimates of above-ground biomass and carbon sequestration rates, we evaluate forest loss and recovery across nine Amazonian countries and at a local scale. We also estimate the role of secondary forests in offsetting old-growth deforestation emissions and explore the temporal trends in forest loss and recovery. We find secondary forests across the biome to have offset just 9.7% of carbon emissions from old-growth deforestation, despite occupying 28.8% of deforested land. However, these numbers varied between countries ranging from 9.0% in Brazil to 23.8% in Guyana for carbon offsetting, and 24.8% in Brazil to 56.9% in Ecuador for forest area recovery. We reveal a strong, negative spatial relationship between old-growth forest loss and recovery by secondary forests, showing that regions with the greatest potential for large-scale restoration are also those that currently have the lowest recovery (e.g. Brazil dominates deforestation and emissions but has the lowest recovery). In addition, a temporal analysis of the regions that were 〉 80% deforested in 1997 shows a continued decline in overall forest cover. Our findings identify three important challenges: (a) incentivising large-scale restoration in highly deforested regions, (b) protecting secondary forests without disadvantaging landowners who depend on farm-fallow systems, and (c) preventing further deforestation. Combatting all these successfully is essential to ensuring that the Amazon biome achieves its potential in mitigating anthropogenic climate change.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/ac1701
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2255379-4
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  • 8
    Online Resource
    Online Resource
    Estimating the multi-decadal carbon deficit of burned Amazonian forests
    IOP Publishing ; 2020
    In:  Environmental Research Letters Vol. 15, No. 11 ( 2020-11-01), p. 114023-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 15, No. 11 ( 2020-11-01), p. 114023-
    Abstract: Wildfires in humid tropical forests have become more common in recent years, increasing the rates of tree mortality in forests that have not co-evolved with fire. Estimating carbon emissions from these wildfires is complex. Current approaches rely on estimates of committed emissions based on static emission factors through time and space, yet these emissions cannot be assigned to specific years, and thus are not comparable with other temporally-explicit emission sources. Moreover, committed emissions are gross estimates, whereas the long-term consequences of wildfires require an understanding of net emissions that accounts for post-fire uptake of CO 2 . Here, using a 30 year wildfire chronosequence from across the Brazilian Amazon, we calculate net CO 2 emissions from Amazon wildfires by developing statistical models comparing post-fire changes in stem mortality, necromass decomposition and vegetation growth with unburned forest plots sampled at the same time. Over the 30 yr time period, gross emissions from combustion during the fire and subsequent tree mortality and decomposition were equivalent to 126.1 Mg CO 2 ha −1 of which 73% (92.4 Mg CO 2 ha −1 ) resulted from mortality and decomposition. These emissions were only partially offset by forest growth, with an estimated CO 2 uptake of 45.0 Mg ha −1 over the same time period. Our analysis allowed us to assign emissions and growth across years, revealing that net annual emissions peak 4 yr after forest fires. At present, Brazil’s National Determined Contribution (NDC) for emissions fails to consider forest fires as a significant source, even though these are likely to make a substantial and long-term impact on the net carbon balance of Amazonia. Considering long-term post-fire necromass decomposition and vegetation regrowth is crucial for improving global carbon budget estimates and national greenhouse gases (GHG) inventories for tropical forest countries.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/abb62c
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2255379-4
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  • 9
    Online Resource
    Online Resource
    The birds of Reserva Extrativista Chico Mendes, South Acre, Brazil
    Boletim do Museu Paraense Emilio Goeldi ; 2010
    In:  Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais Vol. 5, No. 3 ( 2010-12-20), p. 311-333
    Details
    In: Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais, Boletim do Museu Paraense Emilio Goeldi, Vol. 5, No. 3 ( 2010-12-20), p. 311-333
    Abstract: This paper describes the avifauna sampled at Reserva Extrativista Chico Mendes, Acre, Brazil, during October and November, 2008. We recorded 344 bird species of 17 orders and 57 families through point counts, mist-nets and general observations. The most prevalent families were Tyrannidae, Thamnophilidae and Thraupidae with 53, 36 and 22 species, respectively. We recorded some range restricted, little know, and habitat specialists birds exemplified by Crypturellus atrocapillus, C. strigulosus, Primolius couloni, Aulacorhynchus prasinus, Drymophila devillei, Simoxenops ucayalae, Cnipodectes superrufus, Hemitriccus flammulatus, Percnostola lophotes, Xiphorhynchus chunchotambo, and Conioptilon mcilhennyi. Although we surveyed only during the dry season, the rarefaction curves indicate a satisfactory sampling effort. The data show that the Chico Mendes reserve holds a unique Amazonian bird community, which is influenced by the presence of bamboo and second growth vegetation. The results of this paper reinforce the biological importance of the RESEX and highlight the need for more inventories and bird studies at this isolated and little known region of the Brazilian Amazon.
    Type of Medium: Online Resource
    ISSN: 2317-6237 , 1981-8114
    URL: Article
    DOI: 10.46357/bcnaturais.v5i3.632
    Language: Unknown
    Publisher: Boletim do Museu Paraense Emilio Goeldi
    Publication Date: 2010
    detail.hit.zdb_id: 2431406-7
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