Poaceae da Estação Ecológica do Seridó, Rio Grande do Norte, Brasil

Ferreira, Célia Lúcia de Luces Fortes; Oliveira, Regina Célia de; Valls, J. F. M.; Loiola, Maria Iracema Bezerra de

doi:10.1590/s2236-89062009000400008

Cited by 23 publications

(11 citation statements)

References 9 publications

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“…The cluster analysis for the best surveyed areas provided support to at least four ecoregions (IAC, BOH, SSD, and NSD), supporting patterns already observed by other authors for distinct groups of plants (Queiroz 2006, Ferreira et al 2009, Maciel et al 2012, Santos et al 2012) and animals (Hernández 2005, Guedes et al 2014.…”

Section: Discussionsupporting

confidence: 85%

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The heterogeneity of Caatinga biome: an overview of the bat fauna

et al. 2016

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Abstract:In semiarid regions like the Brazilian Caatinga, the long dry season suggests that it is a homogeneous environment. However, differences in climate, soil, relief, and duration of the dry season across this biome has prompted the division of Caatinga in eight ecoregions. Here, we test the validity of these ecoregions for bats, which play a fundamental role in the balance of ecosystems. A literature review was carried out to investigate the distribution of bat species in all Caatinga ecoregions, and the lack of sampling efforts. In total, 90 chiropteran species were recorded in the biome. Bat distribution is not homogeneous, and almost all ecoregions present exclusive species. Gaps in chiropteran sampling efforts occur in all ecoregions. A robust and significant correlation was observed between the number of studies reporting samples and bat richness of each ecoregion, indicating that more research will increase recorded richness in these areas, and in the Caatinga as a whole. The existence of at least four ecoregions in the Caatinga was also supported. This underlines the importance of these areas to conservation initiatives.

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Section: Discussionsupporting

confidence: 85%

“…This division of the Caatinga into ecoregions was totally of partially supported for plants, invertebrates and vertebrates (Queiroz 2006, Hernández 2007, Ferreira et al 2009, Maciel et al 2012, Santos et al 2012, Guedes et al 2014.…”

Section: Introductionmentioning

confidence: 99%

The heterogeneity of Caatinga biome: an overview of the bat fauna

et al. 2016

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“…The taxonomic classification was based on the APG III System (2009), while the spelling of species author names was based on the Species List of Brazilian Flora (2013). Floristic lists included plant habit (herb, vine, shrub or tree, according to Font-Quer [1975]), geographic origin (Duarte et al 2000;Quijano and Pino 2007;Schneider 2007;Silva et al 2007;Biondi and Macedo 2008;Ferreira et al 2009;Oladipupo et al 2009;Sanz-Elorza et al 2010;Vilarreal et al 2010;Araújo et al 2011;Guglieri-Caporal et al 2011;Fabricante and Siqueira-Filho 2012;Fabricante 2013aFabricante , 2013bFabricante , 2013cFabricante , 2014Shirasuna et al 2013), and habitat of establishment (agricultural, ruderal, or natural). Agricultural sites include pasture and cropland areas; ruderal sites represent areas under human influence, such as backyards, gardens, sidewalks, or streets; and natural sites cover the other types of environment, including patches of indigenous vegetation in several conservation conditions.…”

Section: Data Collectionmentioning

confidence: 99%

Non-native and invasive alien plants on fluvial islands in the São Francisco River, northeastern Brazil

Fabricante

Ziller²,

Araújo

et al. 2015

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This paper is the result of a survey of the alien flora present on fluvial islands in the São Francisco River, northeastern Brazil. The floristic similarities between the islands wereassessed, as well as the relationship between area size and species richness. The study covered eight islands in the São Francisco River Valley and was carried out in a period of eight months. Thirty one alien species were registered, six of them (Amaranthus viridis, Calotropis procera, Cenchrus ciliaris, Enneapogon cenchroides, Prosopis pallida and Ricinus communis) present on all islands. The highest number of invasive alien species (26) was recorded on Massangano Island. The floristic similarity between the islands varied between medium and very high, while the number of alien species present was positively correlated with area size. The study demonstrates that the biodiversity on these eight fluvial islands is endangered, especially due to the presence of alien species capable of invading natural areas.

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“…A Sub-bacia do Rio Espinharas está inserida na Depressão Sertaneja Setentrional, paisagem típica do semiárido nordestino, uma extensa planície com elevações residuais disseminadas na paisagem (Ferreira et al, 2009). As altitudes variam de 127 a 1.186 m.…”

Section: Todos Os Seus Cursos D'água Têm Regime De Escoamento Intermiunclassified

Alteração da cobertura vegetal na Sub-Bacia do Rio Espinharas de 2000 a 2010

Silva¹,

Lima²,

Mendonça³

2014

Rev. bras. eng. agríc. ambient.

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R E S U M ONo semiárido nordestino o aumento da área desflorestada e não recuperada da Caatinga degradada fragiliza seus solos e seu equilíbrio hidrológico. Este trabalho teve como objetivo mapear a alteração da cobertura vegetal na Sub-Bacia do Rio Espinharas no período [2000][2001][2002][2003][2004][2005][2006][2007][2008][2009][2010]. Os dados das imagens do sensor Thematic Mapper do satélite Landsat-5 foram processados no ambiente Spring. Para avaliação da cobertura vegetal utilizou-se o índice de vegetação por diferença normalizada. 65% da área apresentam alto grau de antropismo, vegetação rala e solos expostos. A imagem diferença foi analisada considerando-se os valores da média de distribuição dos níveis de cinza na imagem (µ) e do desvio padrão (σ), segundo os limiares [0, μ -σ], [μ -σ, μ + σ] e [μ + σ, 254] relacionando-os às classes: desmatamento/redução, não mudança e áreas de regeneração/incremento da vegetação. Os resultados mostram que 80% da área se mantêm inalterados; em 12,6% da área ocorreu redução da cobertura vegetal pelas práticas de corte raso para obtenção de lenha para uso doméstico ou comercial e preparo da área para a agricultura e em 7,4% da área registrou-se incremento possivelmente favorecido pelo cultivo de pastagens irrigadas e não irrigadas em solos de aluvião. Alteration in the vegetation cover in Sub-Basin of River Espinharas from 2000 to 2010 A B S T R A C TIn the semiarid northeast, the increase in the area of deforestation and non-reclaimed 'Caatinga' sites already degraded weaken its soils and hydrological balance. This study aimed to map the alteration in the vegetation cover along the Espinharas River sub-basin area during the period 2000-2010. The image data collected from the thematic mapper sensor of the satellite Landsat-5 were processed with the aid of computational systems Spring. In order to evaluate the vegetation cover, the normalized difference vegetation index was used. Sixty five percent of the area presented high level of anthropogenic disturbance, sparse vegetation and exposed soils. The difference in image, whose values were analysed taking into account the values of the average distribution of gray levels in the image (µ) standard deviation (σ) according to the thresholds [0, μ -σ], [μ -σ, μ + σ] e [μ + σ, 254], related to the following classifications: deforestation/reduction of vegetation cover, no change and areas of regeneration/vegetation growth. The results showed that 80% of the area remains unchanged, reduction of vegetation cover occurred in 12.6% of the area due to the practice of clear cutting of vegetation in order to obtain firewood for domestic or commercial use and also area preparation for agriculture purposes; some increment was observed in 7.4% of the area possibly due to cultivation of irrigated and non-irrigated pastures in alluvial soils. Alteração da cobertura vegetal na IntroduçãoPreservar a cobertura vegetal é condição fundamental para a conservação dos recursos hídricos uma vez que a vegetação tem importante função na proteção e na...

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Poaceae da Estação Ecológica do Seridó, Rio Grande do Norte, Brasil

Cited by 23 publications

References 9 publications

The heterogeneity of Caatinga biome: an overview of the bat fauna

The heterogeneity of Caatinga biome: an overview of the bat fauna

Non-native and invasive alien plants on fluvial islands in the São Francisco River, northeastern Brazil

Alteração da cobertura vegetal na Sub-Bacia do Rio Espinharas de 2000 a 2010

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