Amazon forest on the edge of collapse in the Maranhão State, Brazil

Silva, Celso; Celentano, Danielle; Rousseau, Guillaume; Moura, Emanoel Gomes de; Varga, István van Deursen; Martinez, Carlos Barreira; Martins, Marlúcia Bonifácio

doi:10.1016/j.landusepol.2020.104806

Cited by 44 publications

(29 citation statements)

References 20 publications

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“…Por se tratar de áreas tradicionalmente ocupadas por atividades agropecuárias, grande parte delas, em regime de agricultura familiar, na qual o uso do sistema de corte e queima é uma característica marcante, pois se traduz na forma mais eficaz e de custo mais baixo na etapa de limpeza de área para o cultivo, o que aumenta a probabilidade de ocorrência de queimadas (SEMA, 2002;SILVA et al, 2017). Além disso, nestes sistemas em que os investimentos tecnológicos são baixos, o fogo, na maioria das vezes, ainda é utilizado como instrumento para abertura e limpeza de área (ÁVILA; WADT, 2015;CARMENTA et al, 2016;DEVISSCHER et al, 2016;MARTÍNEZ-FERNÁNDEZ;CHUVIECO;KOUTSIAS, 2013;SORRENSEN, 2004) JUNIOR et al, 2020). A alta incidência de focos neste período também se justifica pelo fato de que as etapas de limpeza de área, para implementação de atividades agropecuárias, ocorrem, normalmente, nos meses de baixa precipitação, para assim potencializar a utilização do fogo.…”

Section: Discussionunclassified

Identificação espaço-temporal dos padrões de focos de calor no estado do maranhão

Neto

Bezerra

Moura

et al. 2022

CeN

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O fogo no Brasil é associado a diversas etapas do setor agropecuário, sendo frequente o registro de incêndios e queimadas no país. Assim, o Maranhão, é um dos estados com maior ocorrência de focos de queimadas. O objetivo deste trabalho foi analisar a dinâmica espacial e temporal dos focos de calor no Maranhão. Os dados de focos de calor foram adquiridos no Instituto Nacional de Pesquisas Espaciais, enquanto os de pluviosidade com o sensor TRMM. Analisou-se os focos de calor anualmente, entre 2007 a 2019. Estes foram submetidos ao estimador de densidade Kernel no QGIS 2.18. Houve 325.940 focos no Maranhão entre 2007 a 2019, com maior incidência em 2007. A maior precipitação ocorreu entre janeiro e maio, o que coincide com a menor incidência dos focos de calor. Estes estão concentrados no centro maranhense, onde há menor precipitação. Os focos estavam entre 0-149 km de áreas de desmatamento, assentamentos, rodovias e aldeias indígenas. As áreas com maior concentração dos focos de queimadas estão localizadas no bioma cerrado, sendo a maior incidência no segundo semestre, o qual tem menor pluviosidade. Portanto, a incidência dos focos de calor é intrínseca à sazonalidade da precipitação e intensificada pela ação antrópica.

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Section: Discussionunclassified

Identificação espaço-temporal dos padrões de focos de calor no estado do maranhão

Neto

Bezerra

Moura

et al. 2022

CeN

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“…The Amazonian populations are in one of the most threatened regions of this biome, the Eastern Amazon. This region faces high rates of deforestation caused by agriculture, livestock, logging, and hydroelectric plants (Lees et al, 2016; Silva Junior et al, 2020; Vieira et al, 2008) including the Belo Monte Dam located in the Xingu River, the west limit of C. baturitensis distribution. In addition, the species is hunted mainly for food purposes throughout its range.…”

Section: Discussionmentioning

confidence: 99%

Integrative systematics of Neotropical porcupines ofCoendou prehensiliscomplex (Rodentia: Erethizontidae)

Menezes

Feijó

Fernandes‐Ferreira

et al. 2021

J Zool Syst Evol Res

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Coendou comprises the most speciose genus in Erethizontidae, with 15 currently recognized species. Although several taxonomic studies in the last two decades have unveiled part of its diversity, the most widespread Neotropical taxon Coendou prehensilis has received limited attention. Here, we combined morphological and molecular datasets to infer the phylogenetic relationships of the species in the genus and revise the taxonomy of the C. prehensilis complex. We found four morphotypes and three well-supported monophyletic clades within C. prehensilis. These three clades represent valid species: C. prehensilis (restricted to the north of the Atlantic Forest), C. baturitensis (occurring in the eastern Amazonian and montane forests enclaves in the Caatinga), and C. longicaudatus (two subspecies, C. l. longicaudatus from the Amazon and C. l. boliviensis from Cerrado and Chaco). Furthermore, we recovered three morphologically diagnosable clades within Coendou, for which we assigned subgeneric names. Coendou (Coendou) comprises six species (C. baturitensis, C. longicaudatus, C. mexicanus, C. prehensilis, C. quichua, and C. rufescens), Coendou (Sphiggurus) includes five taxa (C. bicolor, C. insidiosus, C. nycthemera, C. speratus, and C. spinosus), and the third subgenus we named Coendou (Caaporamys) subgen. nov, comprising C. melanurus (type species), C. vestitus, C. pruinosus, C. ichillus, and C. roosmalenorum.

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“…1). Together with contiguous Indigenous Lands, the reserve comprises the last remaining block of continuous Amazonian forests in the Bele ´m Centre of Endemism (Silva Junior et al 2020), and is one of the two most important strongholds for the Black-winged Trumpeter (Lima et al 2014, BirdLife International 2018. The reserve has a tropical monsoonal climate with mean annual temperatures >26 C o and mean annual rainfall of 1,800 mm (Alvares et al 2013).…”

Section: Study Areamentioning

confidence: 99%

Current status of the Critically Endangered Black-winged Trumpeter Psophia obscura in one of its last strongholds

Carvalho

Mendonça²,

Lopes³

et al. 2022

Bird Conservation International

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Summary The ‘Critically Endangered’ Black-winged Trumpeter Psophia obscura is endemic to the Belém Centre of Endemism in extreme eastern Amazonia and has a declining population and range. Here we report on a five-year (2016–2020) systematic camera-trap (n = 61) study of the species in Gurupi Biological Reserve, one of its most important conservation areas. We used a multi-season occupancy model to identify factors affecting occupancy rates and to assess occupancy trends in the reserve. Occupancy was negatively related to elevation and site-level tree density, and was positively related to post-logging recovery times. Average annual occupancy rates remained stable throughout the study period (ranging between 0.57 and 0.67) and this stability was largely driven by high between-year survival rates. Results confirm that the Black-winged Trumpeter is an interior-forest specialist that is highly sensitive to forest disturbance, which underlines the importance of the Gurupi Biological Reserve as a core site for the conservation of the species. However, the species is long-lived, so continuous monitoring is needed to further clarify population trends. We also recommended that the status of the species in other forest remnants, most of which remain unprotected, is assessed.

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Amazon forest on the edge of collapse in the Maranhão State, Brazil

Cited by 44 publications

References 20 publications

Identificação espaço-temporal dos padrões de focos de calor no estado do maranhão

Identificação espaço-temporal dos padrões de focos de calor no estado do maranhão

Integrative systematics of Neotropical porcupines ofCoendou prehensiliscomplex (Rodentia: Erethizontidae)

Current status of the Critically Endangered Black-winged Trumpeter Psophia obscura in one of its last strongholds

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