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      Flora of Baturité, Ceará: a Wet Island in the Brazilian Semiarid

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          Abstract

          Abstract The biota of the humid mountain ranges of the Brazilian semiarid is still poorly understood. In order to fill this scientific gap, we carried out an extensive survey along altitudinal ranges (400m - 1,000 m) on both the windward and the leeward slopes of the Baturité Mountain Range, in the state of Ceará state. We registered 400 plant species and 92 families. The Myrtaceae (36 spp.), Fabaceae (25 spp.), Rubiaceae (20 spp.) and Bromeliaceae (15 spp.) families predominated on the windward slope; while Fabaceae (19 spp.), Myrtaceae (14 spp.) and Euphorbiaceae (11 spp.) were the most abundant on the leeward slope. As we expected, the species richness of trees, shrubs, subshrubs, epiphytes and terrestrial herbs was positively correlated with the altitude (R2 > 0.60). Above 800 m, we registered 273 species exclusive to the windward slope, 81 exclusive to the leeward slope, and 46 shared species. Therefore, management actions must consider the spatial heterogeneity, distribution and taxa richness.

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          Changes in Plant Community Diversity and Floristic Composition on Environmental and Geographical Gradients

          Alwyn H. Gentry (1988)
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            Neotropical forest expansion during the last glacial period challenges refuge hypothesis.

            Yuri Leite, Leonora Costa, Ana Carolina Covre Loss … (2016)
            The forest refuge hypothesis (FRH) has long been a paradigm for explaining the extreme biological diversity of tropical forests. According to this hypothesis, forest retraction and fragmentation during glacial periods would have promoted reproductive isolation and consequently speciation in forest patches (ecological refuges) surrounded by open habitats. The recent use of paleoclimatic models of species and habitat distributions revitalized the FRH, not by considering refuges as the main drivers of allopatric speciation, but instead by suggesting that high contemporary diversity is associated with historically stable forest areas. However, the role of the emerged continental shelf on the Atlantic Forest biodiversity hotspot of eastern South America during glacial periods has been ignored in the literature. Here, we combined results of species distribution models with coalescent simulations based on DNA sequences to explore the congruence between scenarios of forest dynamics through time and the genetic structure of mammal species cooccurring in the central region of the Atlantic Forest. Contrary to the FRH predictions, we found more fragmentation of suitable habitats during the last interglacial (LIG) and the present than in the last glacial maximum (LGM), probably due to topography. We also detected expansion of suitable climatic conditions onto the emerged continental shelf during the LGM, which would have allowed forests and forest-adapted species to expand. The interplay of sea level and land distribution must have been crucial in the biogeographic history of the Atlantic Forest, and forest refuges played only a minor role, if any, in this biodiversity hotspot during glacial periods.
            Article 0 comments Cited 72 times – based on 0 reviews     Review now
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              Vegetação, unidades fitoecológicas e diversidade paisagística do estado do Ceará

              Marcelo Moro, Mariana Bezerra Macedo, Marcelo Moura-Fé … (2015)
              ResumoEsse artigo apresenta uma revisão dos tipos vegetacionais do estado do Ceará a partir de sua diversidade paisagística, centrando-se, notadamente, nas condições climáticas e unidades geomorfológicas. Com base em levantamentos de campo, literatura especializada e mapas das unidades fitoecológicas e geomorfológicas, pretendemos expor, de forma didática, a caracterização, distribuição e principais ameaças antrópicas concernentes a cada vegetação. Por fim, utilizamos métodos de análise multivariada para comparar a similaridade de espécies entre os diferentes levantamentos florísticos disponíveis para o estado e discutimos os padrões biogeográficos observados.
              Article 0 comments Cited 41 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): floram
                Title: Floresta e Ambiente
                Abbreviated Title: Floresta Ambient.
                Publisher: Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro (Seropédica, RJ, Brazil )
                ISSN (Print): 1415-0980
                ISSN (Electronic): 2179-8087
                Publication date (Print and electronic): 2020
                Volume: 27
                Issue: 4
                Electronic Location Identifier: e20180320
                Affiliations
                [5] São Luís orgnameUniversidade Federal do Maranhão Brazil
                [6] Cruz das Almas orgnameEmpresa Brasileira de Pesquisa Agropecuária orgdiv1Centro Nacional de Pesquisa de Mandioca e Fruticultura Tropical Brazil
                [3] Quixadá Ceará orgnameUniversidade Estadual do Ceará Brazil
                [7] Taguatinga orgnameUniversidade Católica de Brasília Brazil
                [2] Fortaleza Ceará orgnameUniversidade Federal do Ceará Brazil
                [1] Itapipoca Ceará orgnameUniversidade Estadual do Ceará Brazil
                [4] Viçosa Minas Gerais orgnameUniversidade Federal de Viçosa Brazil
                Article
                Publisher ID: S2179-80872020000400120 Publisher ID: S2179-8087(20)02700400120
                DOI: 10.1590/2179-8087.032018
                SO-VID: 34aceef2-39d8-4036-97a4-e2915a045057
                License:

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                Date accepted : 07 November 2018
                Date received : 28 June 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 42, Pages: 0
                Product

                SciELO Brazil

                Self URI: Full text available only in PDF format (EN)
                Categories
                Subject: Original Article

                Keywords: Steppic Savanna,Semideciduous Tropical Forest,Evergreen Tropical Forest,Deciduous Tropical Forest
                Data availability:
                Keywords: Steppic Savanna, Semideciduous Tropical Forest, Evergreen Tropical Forest, Deciduous Tropical Forest

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