Soaring Extinction Threats to Endemic Plants in Brazilian Metal-Rich Regions

Jacobi, Claudia Maria; Carmo, Flávio Fonseca do; Campos, Iara Christina de

doi:10.1007/s13280-011-0151-7

Cited by 71 publications

(57 citation statements)

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“…5h, i) indicates that animals are more important as pollinators than as seed dispersers in campo rupestre communities (Conceição et al 2007a;Jacobi and Carmo 2011). However, some species, including some endemics, produce ornithochorous fruits, including species in 17 families, notably Melastomataceae, Myrtaceae and Cactaceae (Conceição et al 2007a;Faustino and Machado 2006;Silveira et al 2012a).…”

Section: Mutualistic Plant-animal Interactionsmentioning

confidence: 99%

“…The altitudinal grassland ecosystem on white sandy soils described by Saravia (2008) at Cerro Parabanó, eastern Bolivia is likely a small patch of campo rupestre. Ironstones are concentrated at the Iron Quadrangle, a 7200 km 2 area in the south of the Espinhaço Range that represents a major mineral province in the world (Jacobi and Carmo 2011). Smaller scattered canga areas also occur throughout south-eastern, north-eastern and central-west Brazil, but a particularly important and large canga immersed within the Amazon forest (50°2 1′W, 6°1′S) is the Carajás range, where altitudes are often below 900 m a.s.l.…”

Section: Introductionmentioning

confidence: 99%

“…Succulents (Cactaceae and Piperaceae) usually establish on bare rock or white sandy soils. Therophytes are inconspicuous and rare (Conceição et al 2007b;Jacobi and Carmo 2011;Le Stradic et al 2015a).…”

Section: Introductionmentioning

confidence: 99%

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Ecology and evolution of plant diversity in the endangered campo rupestre: a neglected conservation priority

et al. 2015

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Section: Mutualistic Plant-animal Interactionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ecology and evolution of plant diversity in the endangered campo rupestre: a neglected conservation priority

et al. 2015

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“…Los hábitats rocosos suelen actuar como refugio (sensu Birks, 2015) de plantas, dando protección a especies raras y endémicas (Porembski et al, 1996;Jacobi et al, 2007), como así también a especies sensibles al fuego (Clarke, 2002;Watson & Wardell-Johnson, 2004), al pastoreo (Milchunas & Noy-Meir, 2002) y a sequías (Burke, 2002). Al mismo tiempo, se trata de ambientes sometidos a perturbaciones por actividades mineras, especialmente en el caso de rocas ricas en minerales metalíferos (Finger et al, 1999), lo cual provoca severos impactos en la estructuctura y composición de las comunidades vegetales (Ginocchio & Baker, 2004;Brady et al, 2005;Jacobi & do Carmo, 2008a;Gibson et al, 2010;Jacobi et al, 2011). Distintos autores han reportado, además, la susceptibilidad de los ambientes rocosos a la invasión por especies exóticas, especialmente en sistemas tropicales sometidos a deforestación, incendios y ganadería (Porembski, 2000;Gomes & Alves, 2009, 2010.…”

Section: Introductionunclassified

Heterogeneidad de la vegetación en ambientes basálticos del centro de Argentina.

Cantero¹,

Mulko²,

Núñez³

et al. 2017

Bol. Soc. Argent. Bot.

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Summary:Heterogenity of the vegetation of basaltic environments in central Argentina. The flora and the vegetation of basaltic outcrops of Los Cóndores Mountains, central Argentina, are described. Plant communities were sampled following the Braun-Blanquet methods. The 98 relevés × 272 species matrix was classified through the ISOPAM method. The classification discriminated three main communities occurring in the three different substrates explored in this landscape: Rocky Islands (inselbergs), a Natural Matrix surrounding the Islands and an Agricultural Matrix, surrounding the whole basaltic area. The three communities differed in composition and physiognomy: the Islands were the less disturbed sites, reporting the highest plant species richness and diversity as well as the higher number of endemics, and the lowest number of exotic species. In the other extreme of the disturbance gradient, the Agricultural Matrix showed the opposite patterns and is dominated by annual and perennial herbs, mainly weeds. While the number of aliens is low in the Islands and in the Natural Matrix, almost 50% of the species are exotic in the Agricultural Matrix. The results of this study reveal that the basaltic inselbergs are relevant sites for the conservation of the natural heritage.Key words: Basaltic environments, flora, plant communities, central Argentina.Resumen: Se decribe la flora y la vegetación de pasiajes basálticos de la Sierra de Los Cóndores, Córdoba, Argentina. La vegetación se estudió según criterios de la escuela de Braun-Blanquet; la matriz de 98 inventarios × 272 spp. fue clasificada a través del método ISOPAM. El análisis discrimina tres comunidades correspondientes respectivamente a las tres geoformas relevadas en estos paisajes: Islas rocosas (inselbergs), la Matriz Natural que rodea a las Islas y la Matriz Agrícola que circunda al complejo de paisajes basálticos. Las tres comunidades difieren en su composición florística: las Islas rocosas son los sitios menos perturbados, más ricos en especies, con mayor diversidad, mayor número de especies endémicas y su fisonomía está dominada por formas arbustivas. En el otro extremo, la Matriz Agrícola es la más pobre en especies, la de menor diversidad y endemicidad, y predominan las hierbas perennes y anuales. Las Islas rocosas y la Matriz Natural registran bajos números de especies exóticas en su composición, mientras cerca del 50% de la flora de la matriz agrícola se compone de especies adventicias. Los resultados de este estudio revelan la importancia de las islas rocosas basálticas para la conservación del patrimonio natural de la provincia de Córdoba.

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“…The extent of the occurrence and the area of occupancy of V. minarum are progressively diminishing and this is attested here by historical collections and fieldwork. As recently described by Jacobi et al (2011), Brazil faces a great dilemma: the preservation of its rich metalliferous flora versus the increasing economic pressure of ores demand. The availability of good scientific collections, accurate taxonomical and distributional data will be essential to address more sustainable practices and conservation priorities for the future of endemic species, such as Vriesea minarum.…”

Section: Discussionmentioning

confidence: 99%

Brazilian plants urgently needing conservation: the case of Vriesea minarum (Bromeliaceae)

Versieux

2011

Phytotaxa

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Difficulties in identifying Vriesea minarum as well as a conflict of interest among mining companies and local conservationists are pushing this species towards extinction. Vriesea minarum was categorised as data deficient in the Brazilian official plant red list despite earlier works indicating its vulnerability. This species is restricted to the Iron Quadrangle area, Minas Gerais, Brazil, where it grows over iron rock outcrops. Here we use V. minarum to illustrate the importance of taxonomic investigation as well as the presentation of accurate distributional data in order to establish conservation strategies. We emphasize the importance of well-conserved herbaria collections and adequate type material to avoid taxonomic issues that delay the understanding of species limits. This paper presents taxonomic notes and the redefining of V. minarum based on the survey of 22 herbaria collections and fieldwork. The additional material obtained and a morphometric approach allowed us to better delimit the related taxa. The species V. ouroensis is considered to be a new synonym of V. minarum. A map showing the occurrences of populations of V. minarum, pictures of living specimens in the field, as well as its updated conservation status are provided. Historic records housed in herbaria indicate that this species has been progressively losing its area of occurrence.

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Soaring Extinction Threats to Endemic Plants in Brazilian Metal-Rich Regions

Cited by 71 publications

References 11 publications

Ecology and evolution of plant diversity in the endangered campo rupestre: a neglected conservation priority

Ecology and evolution of plant diversity in the endangered campo rupestre: a neglected conservation priority

Heterogeneidad de la vegetación en ambientes basálticos del centro de Argentina.

<p class="HeadingRunIn"><strong>Brazilian plants urgently needing conservation: the case of <em>Vriesea minarum</em> (Bromeliaceae)</strong></p>

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