27 research outputs found

    Systematic studies of Elaphoglossum section Polytrichia (Dryopteridaceae)

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    Elaphoglossum is the largest genus of the largest family of ferns, the Dryopteridaceae. It has over 600 species distributed in the temperate and tropical regions of the world, but it is especially diverse in the Neotropics, where ca. 80% of the species occur. Morphologically, the genus is usually characterized by simple entire leaves, free veins, acrostichoid sori, and phyllopodia. One of the major clades within Elaphoglossum is the subulate-scaled clade, which includes all species with subulate scales on the leaves. These scales are often patent and enrolled lengthwise, imparting a bristly or shaggy appearance to the plants. Previous studies have suggested that the subulate-scaled clade is composed of two subclades distinguished by the presence versus absence of hydathodes. The non-hydathodous clade corresponds to Elaphoglossum section Polytrichia and is the main focus of this study. The dissertation comprises four chapters that were prepared for publication in different peer-reviewed journals. The first chapter is a molecular phylogeny of the subulate-scaled species of Elaphoglossum based on DNA sequence data from three plastid markers (atpβ-rbcL, rps4-trnS, and trnL-trnF). The results of this study provide the bases for the other three chapters, which include a nomenclatural synopsis of E. sect. Polytrichia, a monographic revision of the Apoda clade of E. sect. Polytrichia, and a floristic treatment of the Brazilian species of E. sect. Polytrichia. In Chapter 1, all well-established groups of Elaphoglossum were recovered with high statistical support, including a subulate-scaled clade composed of two (weakly supported) subclades distinguished by the presence vs. absence of hydathodes. Phylogenetic relationships within each of these subclades are discussed and several groups are suggested for future monographic study. In Chapter 2, I present a nomenclator for the 52 species of E. sect. Polytrichia (i.e., the non-hydathodous clade). All taxa are enumerated and accompanied by place and date of publication, information on types, synonymy, distributional notes, and pertinent remarks. A map of geographic distribution for the section is provided for the first time. One new species and several other nomenclatural changes are suggested. In Chapter 3, I provide a monographic treatment for the 13 species of the Apoda Clade of Elaphoglossum. Species of this clade are characterized by the presence of lustrous and brightly colored stem scales, small glandular hairs, and evenly distributed scales on petioles, costae, and laminar surfaces. One new species is suggested. To facilitate the identification of species, I provide illustrations, descriptions, comments, synonymy, distribution maps, and an identification key to all 13 species in this group. Chapter 4 follows the same format of the previous one, but includes only the species of E. sect. Polytrichia that occur in Brazil. Eleven species are recognized in this last chapter, including two newly described ones

    A list of land plants of Parque Nacional do Caparaó, Brazil, highlights the presence of sampling gaps within this protected area

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    Brazilian protected areas are essential for plant conservation in the Atlantic Forest domain, one of the 36 global biodiversity hotspots. A major challenge for improving conservation actions is to know the plant richness, protected by these areas. Online databases offer an accessible way to build plant species lists and to provide relevant information about biodiversity. A list of land plants of “Parque Nacional do Caparaó” (PNC) was previously built using online databases and published on the website "Catálogo de Plantas das Unidades de Conservação do Brasil." Here, we provide and discuss additional information about plant species richness, endemism and conservation in the PNC that could not be included in the List. We documented 1,791 species of land plants as occurring in PNC, of which 63 are cited as threatened (CR, EN or VU) by the Brazilian National Red List, seven as data deficient (DD) and five as priorities for conservation. Fifity-one species were possible new ocurrences for ES and MG states

    Impact of COVID-19 on cardiovascular testing in the United States versus the rest of the world

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    Objectives: This study sought to quantify and compare the decline in volumes of cardiovascular procedures between the United States and non-US institutions during the early phase of the coronavirus disease-2019 (COVID-19) pandemic. Background: The COVID-19 pandemic has disrupted the care of many non-COVID-19 illnesses. Reductions in diagnostic cardiovascular testing around the world have led to concerns over the implications of reduced testing for cardiovascular disease (CVD) morbidity and mortality. Methods: Data were submitted to the INCAPS-COVID (International Atomic Energy Agency Non-Invasive Cardiology Protocols Study of COVID-19), a multinational registry comprising 909 institutions in 108 countries (including 155 facilities in 40 U.S. states), assessing the impact of the COVID-19 pandemic on volumes of diagnostic cardiovascular procedures. Data were obtained for April 2020 and compared with volumes of baseline procedures from March 2019. We compared laboratory characteristics, practices, and procedure volumes between U.S. and non-U.S. facilities and between U.S. geographic regions and identified factors associated with volume reduction in the United States. Results: Reductions in the volumes of procedures in the United States were similar to those in non-U.S. facilities (68% vs. 63%, respectively; p = 0.237), although U.S. facilities reported greater reductions in invasive coronary angiography (69% vs. 53%, respectively; p < 0.001). Significantly more U.S. facilities reported increased use of telehealth and patient screening measures than non-U.S. facilities, such as temperature checks, symptom screenings, and COVID-19 testing. Reductions in volumes of procedures differed between U.S. regions, with larger declines observed in the Northeast (76%) and Midwest (74%) than in the South (62%) and West (44%). Prevalence of COVID-19, staff redeployments, outpatient centers, and urban centers were associated with greater reductions in volume in U.S. facilities in a multivariable analysis. Conclusions: We observed marked reductions in U.S. cardiovascular testing in the early phase of the pandemic and significant variability between U.S. regions. The association between reductions of volumes and COVID-19 prevalence in the United States highlighted the need for proactive efforts to maintain access to cardiovascular testing in areas most affected by outbreaks of COVID-19 infection

    ATLANTIC EPIPHYTES: a data set of vascular and non-vascular epiphyte plants and lichens from the Atlantic Forest

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    Epiphytes are hyper-diverse and one of the frequently undervalued life forms in plant surveys and biodiversity inventories. Epiphytes of the Atlantic Forest, one of the most endangered ecosystems in the world, have high endemism and radiated recently in the Pliocene. We aimed to (1) compile an extensive Atlantic Forest data set on vascular, non-vascular plants (including hemiepiphytes), and lichen epiphyte species occurrence and abundance; (2) describe the epiphyte distribution in the Atlantic Forest, in order to indicate future sampling efforts. Our work presents the first epiphyte data set with information on abundance and occurrence of epiphyte phorophyte species. All data compiled here come from three main sources provided by the authors: published sources (comprising peer-reviewed articles, books, and theses), unpublished data, and herbarium data. We compiled a data set composed of 2,095 species, from 89,270 holo/hemiepiphyte records, in the Atlantic Forest of Brazil, Argentina, Paraguay, and Uruguay, recorded from 1824 to early 2018. Most of the records were from qualitative data (occurrence only, 88%), well distributed throughout the Atlantic Forest. For quantitative records, the most common sampling method was individual trees (71%), followed by plot sampling (19%), and transect sampling (10%). Angiosperms (81%) were the most frequently registered group, and Bromeliaceae and Orchidaceae were the families with the greatest number of records (27,272 and 21,945, respectively). Ferns and Lycophytes presented fewer records than Angiosperms, and Polypodiaceae were the most recorded family, and more concentrated in the Southern and Southeastern regions. Data on non-vascular plants and lichens were scarce, with a few disjunct records concentrated in the Northeastern region of the Atlantic Forest. For all non-vascular plant records, Lejeuneaceae, a family of liverworts, was the most recorded family. We hope that our effort to organize scattered epiphyte data help advance the knowledge of epiphyte ecology, as well as our understanding of macroecological and biogeographical patterns in the Atlantic Forest. No copyright restrictions are associated with the data set. Please cite this Ecology Data Paper if the data are used in publication and teaching events. © 2019 The Authors. Ecology © 2019 The Ecological Society of Americ

    The ferns and lycophytes of Reserva Natural Guaricica, Antonina, Paraná, Brazil

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    We found 204 species of pteridophytes in Reserva Natural Guaricica, a private natural heritage reserve (RPPN) in Antonina, Paraná, Brazil. With approximately 8,600 ha and elevations ranging from sea level to 600 m, RPPN Guaricica has more species of pteridophytes than any other area in Paraná. Ferns are represented by 194 species in 82 genera and 26 families, whereas lycophytes comprise 10 species in four genera and two families. The RPPN is the type locality of two recently described species: Hypolepis acantha Schwartsb. and Oleandra australis Schwartsb. & J.Prado. It is also the only place of occurrence of Didymoglossum angustifrons Fée, Diplazium riedelianum (Bong. ex Kuhn) C.Chr., Pteris ensiformis Burm.f., P. tripartita Sw., Saccoloma elegans Kaulf., and Steiropteris polypodioides (Raddi) Salino & T.E.Almeida in Paraná. Pteris ensiformis and Saccoloma brasiliense (C.Presl) Mett. are new state records. Additional species are expected to occur in the area, in view of their known geographical ranges

    The ferns and lycophytes of Reserva Natural Guaricica, Antonina, Paraná, Brazil

    No full text
    We found 204 species of pteridophytes in Reserva Natural Guaricica, a private natural heritage reserve (RPPN) in Antonina, Paraná, Brazil. With approximately 8,600 ha and elevations ranging from sea level to 600 m, RPPN Guaricica has more species of pteridophytes than any other area in Paraná. Ferns are represented by 194 species in 82 genera and 26 families, whereas lycophytes comprise 10 species in four genera and two families. The RPPN is the type locality of two recently described species: Hypolepis acantha Schwartsb. and Oleandra australis Schwartsb. & J.Prado. It is also the only place of occurrence of Didymoglossum angustifrons Fée, Diplazium riedelianum (Bong. ex Kuhn) C.Chr., Pteris ensiformis Burm.f., P. tripartita Sw., Saccoloma elegans Kaulf., and Steiropteris polypodioides (Raddi) Salino & T.E.Almeida in Paraná. Pteris ensiformis and Saccoloma brasiliense (C.Presl) Mett. are new state records. Additional species are expected to occur in the area, in view of their known geographical ranges
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