Caatinga Revisited: Ecology and Conservation of an Important Seasonal Dry Forest

Albuquerque, Ulysses Paulino; Araújo, Elcida de Lima; El-Deir, Ana Carla Asfora; Lima, André Luiz Alves de; Souto, Antonio; Bezerra, Bruna M.; Ferraz, Elba Maria Nogueira; Freire, Eliza María Xavier; Sampaio, Everardo Valadares de Sá Barreto; Las-Casas, Flor Maria Guedes; Moura, Geraldo Jorge Barbosa de; Pereira, Glauco Alves; Melo, Joabe Gomes de; Ramos, Marcelo Alves; Rodal, Maria Jesus Nogueira; Schiel, Nicola; Neves, Rachel Maria de Lyra; Alves, Rômulo Romeu Nóbrega; Azevedo-Júnior, Severino Mendes de; Júnior, Wallace Rodrigues Telino; Severi, William

doi:10.1100/2012/205182

Cited by 224 publications

(178 citation statements)

References 116 publications

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“…These hypotheses were subsequently rejected (Prado & Gibbs, 1993). Recent studies indicate that the flora of the caatinga is surprisingly diverse (Giulietti et al, 2002(Giulietti et al, , 2004(Giulietti et al, , 2009Albuquerque et al, 2012) and includes 4,320 species of angiosperms (Forzza et al, 2010), which have relationships with a range of pollinators including 187 species of native bees . There is a mosaic of different ecosystems in the dry vegetation in the caatinga, which covers an area of approximately 800,000 km² and practically the entire semiarid climate region in Brazil, from the northeast through a region north of the State of Minas Gerais (Prado, 2003;Giulietti et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Pollen types collected by Tetragonisca angustula (Hymenoptera: Apidae) in dry vegetation in Northeastern Brazil

Novaıs¹,

Absy²,

Santos³

2014

Eur. J. Entomol.

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Abstract. Knowing the floral origin of the pollen collected by native bees in Neotropical ecosystems enables us to understand the dynamics of the interdependent relationships between the insects and the native flora. The objectives of this study were to: (i) investigate the spectrum of plant species from which pollen is collected by Tetragonisca angustula in caatinga (dry vegetation) areas in the semiarid region of Northeastern Brazil; (ii) identify pollen types that could be used as regional geographical markers and (iii) determine the pollen niche breadth and the pattern of use of floral resources by this stingless bee. In total, 23 samples of the pollen stored by T. angustula were collected monthly and subjected to acetolysis. Of the 45 pollen types identified that of Prosopis juliflora (Fabaceae) and Solanum (Solanaceae) were the most frequently represented in the samples and 19 were collected by the bees at both study sites. Species characteristic of caatinga, such as Poincianella pyramidalis (Tulasne) L.P. Queiroz and Senna macranthera (de Candolle ex Colladon) H.S. Irwin & Barneby, were among the pollen identified and they were used as indicators of the geographical origin of the samples. The average values of the pollen niche breadth (H') and equitability (J') indicate that T. angustula is a generalist and homogeneous forager of the floral resources in caatinga.

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Section: Introductionmentioning

confidence: 99%

Pollen types collected by Tetragonisca angustula (Hymenoptera: Apidae) in dry vegetation in Northeastern Brazil

Novaıs¹,

Absy²,

Santos³

2014

Eur. J. Entomol.

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“…However, the average annual temperature is high (~27°C), while rainfall is both highly restricted in time (all within a period of around three months) and very unpredictable (e.g., annual variation from 360 to 1340 mm) (prAdo 2003), so that the Caatinga shares characteristics with more arid areas (BlASco et al 2000). Most publications on the birds of the region are restricted to inventories, so that there is very little available on the ecology of individual species (review in AlBuquerque et al 2012). Some studies have suggested a link between the timing of Caatinga bird breeding and that of the rainy season (telIno-Jr et al 2005), but no assessments are available for the quantitative relationship between rainfall, reproductive period and reproductive intensity.…”

mentioning

confidence: 99%

Effects of rainfall on bird reproduction in a semi-arid Neotropical region

Cavalcanti¹,

Paiva²,

França³

2016

Zoologia (Curitiba)

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ABSTRACT. In semi-arid ecosystems, birds commonly use rainfall as a reliable environmental cue to adjust the timing and strength of their reproductive activity. Here we evaluate this hypothesis for a community of birds in the Caatinga (the semi-arid region of northeastern Brazil), using brood patch information and nest abundance. Sampling occurred every 14 days between September 2012 and August 2013 (brood patch), and every three or four days during the reproductive period (nests). Abundance of brood patches and nests were correlated, and all brood patches were recorded between March and July (4.5 to 5.0 months). We recorded three peaks of brood patch abundance: the first 28 days after the first rains, the second 14 days after the second rainfall peak, and the third synchronously with the third rainy period. These results indicate that intra-annual variation in local rainfall has the potential to account for variations in the timing and intensity of reproduction in the studied birds.

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“…Essa mudança pode proporcionar alterações na ciclagem dos principais elementos químicos no solo, resultando em emissões de GEE (ALBUQUERQUE et al, 2012). De fato, os estoques de C e N contidos nos solos com vegetação nativa sofrem modificações quando esses sistemas são convertidos ao uso agríco-la (FRACETTO et al, 2012) e, dependendo do sistema de manejo do solo empregado, os estoques podem permanecer iguais, aumentar ou diminuir em relação ao sistema natural (CERRI et al, 2009).…”

Section: Introductionunclassified

Emissões De Gases De Efeito Estufa Na Produção De Mamona E De Seus Subprodutos

Fracetto

Feigl³

et al. 2015

Rev. Caatinga

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RESUMO -A maior produção brasileira de mamona (Ricinus communis L.) se concentra na caatinga do estado da Bahia, onde a mudança do uso da terra para o seu cultivo tem sido considerada uma estratégia de recuperação de áreas degradadas. No entanto, alterações no solo nativo proporcionam impactos ambientais, como emissões de gases de efeito estufa (GEE). Presume-se que elevadas emissões de GEE sejam provenientes da mudança do uso da terra para o cultivo de mamona e que os subprodutos dessa oleaginosa também participam dessas emissões. O objetivo deste trabalho foi realizar o inventário das emissões de GEE decorrentes do cultivo da mamona e seus subprodutos. Foi realizado um estudo na Fazenda Floresta, no município de Irecê (BA), onde foram avaliadas: a mudança no estoque de carbono (C) no solo cultivado com mamona e na floresta nativa local; a quantidade de folhas senescentes e fitomassa epígea; e as emissões de GEE provenientes dos subprodutos da produção agrícola de mamona. Os resultados mostraram que a soma das folhas senescentes e fitomassa epí-gea obtida pela poda da mamona é superior a 1,6 Mg ha -1 ano -1 e o uso da torta de mamona no solo apresentou emissões de N 2 O próximas a 600 µg m -2. As emissões provenientes do uso do biodiesel de óleo de rícino representaram menos de 10% das emissões. A mudança de uso da terra foi responsável pelas elevadas emissões de GEE, representando 87% do total em CO 2 eq. Em comparação às emissões estimadas para o etanol de cana-deaçúcar, o biodiesel de mamona apresentou emissões 32% inferiores.Palavras-chave: Semiárido. Mudança de uso da terra. Fitomassa de mamona. Biodiesel. GREENHOUSE GAS FROM CASTOR BEAN PRODUCTION AND THEIR SUBPRODUCTSABSTRACT -The largest production of castor bean (Ricinus communis L.) focuses on Bahia savanna, where the change of land use to their cultivation has been considered a strategy of degraded areas recovery. However, changes in the native soil can arise environmental impacts as greenhouse gases (GHG) emissions. We have assumed that higher GHG emissions come from a change of land use for castor bean cultivation and their subproducts contribute to GHG emissions. The objective of this study was to make the inventory of the emission of GHG resulting from the castor bean cultivation and their sub-products. It was done a study in the municipality of Irecê-BA and were evaluated: changes in carbon (C) soil stocks in cultivated areas with castor bean and Local native forest; a number of senescent leaves and the biomass produced epigeal; GHG emissions from the sub -products of castor bean. The results showed that the sum of senescent leaves and epigeal biomass obtained by castor bean pruning is more than 1.6 Mg ha -1 ano -1 and the castor bean residues used in this soil presented N 2 O emissions close to 600 µg m -2 . The emissions from the use of castor oil biodiesel represented less than 10% of the emissions. The change in land use handled high emissions of greenhouse gases, accounting for 87% of the total in CO 2 eq. Compared to emissions estimated fo...

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Caatinga Revisited: Ecology and Conservation of an Important Seasonal Dry Forest

Cited by 224 publications

References 116 publications

Pollen types collected by Tetragonisca angustula (Hymenoptera: Apidae) in dry vegetation in Northeastern Brazil

Pollen types collected by Tetragonisca angustula (Hymenoptera: Apidae) in dry vegetation in Northeastern Brazil

Effects of rainfall on bird reproduction in a semi-arid Neotropical region

Emissões De Gases De Efeito Estufa Na Produção De Mamona E De Seus Subprodutos

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