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      Diversity and conservation status of bromeliads from Serra da Piedade, Minas Gerais, Brazil Translated title: Diversidade e estado de conservação das bromélias da Serra da Piedade, Minas Gerais, Brasil

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          Abstract

          The Espinhaço Mountain Range in Minas Gerais state in southeastern Brazil is a center of endemism of the Bromeliaceae, mainly in campo rupestre montane vegetation that grows under rigorous edapho-climatic conditions. This study sought to improve our knowledge of the Bromeliaceae from Serra da Piedade in the extreme southern portion of the Espinhaço Mountain Range where ironstone outcrops predominate. Conservation status and spatial distribution of these plants were analyzed as well as floristic similarities with other regions with rocky outcrops. Twenty-five bromeliad species were found in Serra da Piedade, with the subfamily Tillandsioideae being the best represented. Twenty-seven percent of the species were exclusive to campo rupestre environments, while 73% occurred both on outcrops and in forest habitats. The bromeliads in the study area merit special attention as two species are considered vulnerable (Racinaea aerisincola and Vriesea minarum), five are endangered, and three are critically endangered. Low Jaccard index values indicated dissimilarities between the bromeliad floras in different localities of quartzite and ironstone outcrops within the Espinhaço Mountain Range. Serra da Piedade has a distinct bromeliad flora that is threatened by mining activities and illegal harvesting and requires immediate measures to help guarantee conservation.

          Translated abstract

          A Cadeia do Espinhaço em Minas Gerais, sudeste do Brasil, é reconhecida como centro de endemismo de Bromeliaceae, principalmente nos campos rupestres, onde as condições edafo-climáticas são severas. O objetivo deste estudo foi estender o conhecimento sobre as Bromeliaceae da Serra da Piedade localizada no extremo sul da Cadeia do Espinhaço onde predomina a ocorrência de afloramentos ferruginosos. O estado de conservação e a distribuição espacial foram analisados, bem como, a similaridade florística de bromélias entre diferentes localidades com afloramentos rochosos. Na Serra da Piedade foram encontradas 25 espécies, sendo a subfamília Tillandsioideae a mais representativa. Dentre as espécies, 27% são exclusivas de campos rupestres e 73% ocorreram tanto nos afloramentos rochosos quanto nos habitats florestais. As espécies de bromélias na área de estudo necessitam de muita atenção, pois duas espécies estão vulneráveis (Racinaea aerisincola e Vriesea minarum), cinco espécies em perigo e três espécies em perigo crítico de extinção. Os baixos valores do índice de Jaccard apontaram uma dissimilaridade entre a flora de bromélias de diferentes localidades com afloramentos quartzíticos e ferruginosos da Cadeia do Espinhaço. A Serra da Piedade apresenta uma flora de bromélias exclusiva, a qual está ameaçada pela mineração e extrativismo, sendo necessária uma ação imediata para sua conservação.

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          Tratado de fitogeografia do Brasil

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            Avaliação e ações prioritárias para a conservação da biodiversidade da Mata Atlântica e Campos Sulinos

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              Rock outcrop vegetation in Brazil: a brief overview

              This paper overviews the special issue of the Brazilian Journal of Botany dedicated to "Rock outcrop vegetation in Brazil". The main topics covered by this issue are phytogeography and vegetation ecology, plant life on shallow soils, plant reproduction and auto-ecology, morpho-physiology and plant adaptation, and finally conservation and global change. This collection of studies, in addition to other recent publications on Brazilian rocky outcrop vegetation, show that measurements of most of the relevant ecological and evolutionary parameters are under way and that scientific attention is now given to most Brazilian regions. However, there are still several gaps to be bridged: 1) inselbergs and high mountains in the Amazon and the Brazilian northeast, in particular, are still largely unknown to science; 2) long-term studies are almost totally unavailable, which hinders global change monitoring and assessment; 3) national and international networking are urgently needed to speed up scientific production about such habitats.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rod
                Rodriguésia
                Rodriguésia
                Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (Rio de Janeiro )
                2175-7860
                June 2012
                : 63
                : 2
                : 243-255
                Affiliations
                [1 ] Fundação Centro Tecnológico de Minas Gerais Brazil
                [2 ] Universidade Federal de Minas Gerais Brazil
                [3 ] Instituto Cultural Inhotim Brazil
                Article
                S2175-78602012000200001
                10.1590/S2175-78602012000200001
                ddb4fcf4-5de3-462f-8e38-3c2433d64b0a

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=2175-7860&lng=en
                Categories
                ECOLOGY
                PLANT SCIENCES

                Plant science & Botany,Ecology
                conservation,campos rupestres,ironstone outcrops,Bromeliaceae,conservação,afloramentos ferruginosos

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