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      Is it the end of the Cerrado domain in the west of state of Paraná (Brazil)? Floristic aspects of Cerrado fragments in Campo Mourão

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          Abstract

          Abstract Currently only a few relicts of Brazilian savanna (Cerrado domain) remain sparsely distributed in state of Paraná. This study catalogued the species of vascular plants occurring in three Cerrado fragments of Campo Mourão. We analysed 4,125 herbarium specimens, 952 of which were collected in the Cerrado fragments, representing 368 species (25 exotic) distributed in 70 families and 241 genera. Fabaceae, Asteraceae, Myrtaceae, Euphorbiaceae, Poaceae, Bignoniaceae, Malvaceae and Apocynaceae were the richest families. Sixty species (16%) were only collected before 1999, with no re-collections after 2000. Among the native species, 51 are endemic to Brazil, and three are confined to the state of Paraná. Six species are regarded as officially endangered in Brazil. We also present the first record of Jacaranda mutabilis for Southern Brazil. Forty-two species are probably locally extinct in Campo Mourão. In the three Cerrado fragments within the municipality, the forest phytophysiognomy is already predominant in these areas, indicating the expansion of Semideciduous Seasonal Forest within the Cerrado fragments. In addition, the presence of exotic species and the lack of legal, environmental protection in the two largest fragments put the future existence of these Cerrado fragments from Campo Mourão at risk.

          Translated abstract

          Resumo Atualmente restam poucos fragmentos relictuais de Cerrado distribuídos esparsamente no Paraná. Este estudo catalogou as espécies de plantas vasculares ocorrentes em três áreas de Cerrado de Campo Mourão: Estação Ecológica do Cerrado, Cerrado dos Perdoncini e Lote 7H. Analisamos 4.125 coletas, sendo 952 coletadas em áreas de cerrado, que representaram 368 espécies (25 exóticas), distribuídas em 70 famílias e 241 gêneros. Fabaceae, Asteraceae, Myrtaceae, Euphorbiaceae, Poaceae, Bignoniaceae, Malvaceae e Apocynaceae foram as famílias mais ricas. Sessenta espécies (16%) só foram coletadas antes de 1999, não existindo coletas após o ano 2000. Entre as espécies nativas, 51 são endêmicas do Brasil e três do Paraná, seis são consideradas oficialmente ameaçadas de extinção no Brasil. Este estudo cita pela primeira vez Jacaranda mutabilis para o sul do Brasil. Quarenta e duas espécies foram consideradas provavelmente extintas localmente em Campo Mourão. Nas três áreas de Cerrado que ocorrem no município já se observa a fisionomia predominantemente florestal sobre os fragmentos, indicando o avanço da Floresta Estacional Semidecidual sobre o Cerrado. Em adição, a presença de espécies exóticas e ausência de proteção legal nos dois maiores fragmentos, coloca em risco a existência dessas áreas de Cerrado de Campo Mourão.

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          An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV

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              Extinction risk from climate change.

              Climate change over the past approximately 30 years has produced numerous shifts in the distributions and abundances of species and has been implicated in one species-level extinction. Using projections of species' distributions for future climate scenarios, we assess extinction risks for sample regions that cover some 20% of the Earth's terrestrial surface. Exploring three approaches in which the estimated probability of extinction shows a power-law relationship with geographical range size, we predict, on the basis of mid-range climate-warming scenarios for 2050, that 15-37% of species in our sample of regions and taxa will be 'committed to extinction'. When the average of the three methods and two dispersal scenarios is taken, minimal climate-warming scenarios produce lower projections of species committed to extinction ( approximately 18%) than mid-range ( approximately 24%) and maximum-change ( approximately 35%) scenarios. These estimates show the importance of rapid implementation of technologies to decrease greenhouse gas emissions and strategies for carbon sequestration.
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                Author and article information

                Journal
                rod
                Rodriguésia
                Rodriguésia
                Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (Rio de Janeiro, RJ, Brazil )
                0370-6583
                2175-7860
                2023
                : 74
                : e01332022
                Affiliations
                [1] Maringá Paraná orgnameUniversidade Estadual de Maringá orgdiv1Prog. Pós-graduação em Geografia Brazil
                [2] Maringá Paraná orgnameUniversidade Estadual de Maringá orgdiv1Herbário HUEM Brazil
                [4] Campo Mourão PR orgnameUniversidade Estadual do Paraná orgdiv1Lab. Estudos Paleoambientais Brazil
                [3] Campo Mourão Paraná orgnameUniversidade Tecnológica Federal do Paraná orgdiv1Herbário HCF Brazil
                Article
                S2175-78602023000100249 S2175-7860(23)07400000249
                10.1590/2175-7860202374057
                3dd52f6f-3726-42c1-9336-5642888190ba

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

                History
                : 13 December 2022
                : 13 June 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 66, Pages: 0
                Product

                SciELO Brazil

                Categories
                Original Papers

                Estação Ecológica do Cerrado,vegetação urbana,endemismo,conservação,angiospermas,urban vegetation,endemism,conservation,angiosperms

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