• Estimación de población contagiada por Covid-19 usando regresión Logística generalizada y heurísticas de optimización 

  Villalobos Arias, Mario Alberto (2020-04-02)

  En este trabajos se presenta una propuesta para la estimación de la poblaciones usando ajuste de curvas del tipo logística. Este tipo de curvas se utilizan para el estudio de crecimiento de poblaciones, en este casos ...

• New insights into the molecular phylogeny of the swimming crabs of the genera Portunus Weber, 1795 and Achelous De Haan, 1833 (Brachyura: Portunidae) of the Americas 

  Mantelatto, Fernando; Robles, Rafael; Wehrtmann, Ingo S.; Schubart, Christoph D.; Felder, Darryl L. (2018)

  Earlier studies of swimming crabs (family Portunidae) in the Americas suggested polyphyly of Portunus Weber, 1795. Our previous molecular analyses provided evidence for a subdivision of the genus, resulting in a reassignment ...

• Seagrass organic carbon stocks show minimal variation over short time scales in a heterogeneous subtropical seascape 

  Samper Villarreal, Jimena; Mumby, Peter J.; Saunders, Megan Irene; Roelfsema, Chris; Lovelock, Catherine E. (2018)

  Blue carbon initiatives require accurate monitoring of carbon stocks. We examined sources of variability in seagrass organic carbon (Corg) stocks, contrasting spatial with short temporal scales. Seagrass morphology and ...

• ICSEM10 Slideshow 

  Darrah, Randy (2020-03-03)

  This is a slideshow produced for the 10th International Congress on the Systematics and Ecology of Myxomycetes, held in the city of Turrialba (UCR, Sede del Atlántico) in February 2020.

• The new Refugium Botanicum. Maxillariella (Maxillaria) tenuifolia 

  Fernández Campos, Melania; Pupulin, Franco (2017)

  Maxillariella tenuifolia (Lindl.) M.A. Blanco & Carnevali, Lankesteriana 7(3): 530. 2007. Basionym: Maxillaria tenuifolia Lindl., Edwards’s Botanical Register 23: sub. t. 1986. 1837. Type: “a native of ...

• The New Refugium Botanicum. Guarianthe skinneri 

  Belfort Oconitrillo, Noelia; Pupulin, Franco (2017)

  Guarianthe skinneri (Bateman) Dressler & W.E.Higgins, Lankesteriana 7:38 (2003). Basionym: Cattleya skinneri Bateman, Orchid. Mex. Guat. 1839. Type: Habitat in Guatemala, G. Skinner s.n. (holotype, K). Epiphytic, ...

• The new Refugium Botanicum. Trigonidium lankesteri 

  Belfort Oconitrillo, Noelia; Pupulin, Franco (2017)

  Trigonidium lankesteri Ames, Schedulae Orchidianae 5: 32–34. 1923. Maxillaria luisae Molinari, Richardiana 15:302. 2014 [2015]. Type: Costa Rica: Las Cóncavas, in cultivation, February 1923, C.H. Lankester 367 ...

• Modelado de la concentración de partículas PM10 en Costa Rica mediante el uso del modelo WRF-Chem 

  Briceño Castillo, Jeff (2020-03-18)

  En el presente trabajo de investigación se analizan, por primera vez en el país, los niveles de concentración de PM10, utilizando simulaciones numéricas realizadas con el modelo WRF (Weather Research and Forecasting) y su ...

• Geometric goodness of fit measure to detect patterns in data point clouds 

  Hernádez Alvarado, Alberto Jose; Solís Chacón, Maikol; Zúñiga Rojas, Ronald Alberto (2019)

  The curse of dimensionality is a commonly encountered problem in statistics and data analysis. Variable sensitivity analysis methods are a well studied and established set of tools designed to overcome these sorts of ...

• Masdevallia luerorum (Orchidaceae: Pleurothallidinae), a new species from Costa Rica 

  Bogarín Chaves, Diego Gerardo; Oses Salas, Lizbeth; Smith, Christina M. (2017)

  Masdevallia luerorum from the southern Pacific region of Costa Rica is described and illustrated. It resembles M. lata, but differs in the single flowered inflorescence, the shorter sepals, the broad and cylindrical sepaline ...

• Two novelties in genus Platystele (Orchidaceae: Pleurothallidinae) from Costa Rica 

  Karremans Lok, Adam Philip; Bogarín Chaves, Diego Gerardo (2017)

  Two new species of Platystele allied to P. oxyglossa complex are described from Costa Rica. Platystele carl-lueriana can be distinguished from P. catiensis and P. oxyglossa by the compact inflorescence that barely exceeds ...

• Genera Pleurothallidinarum: the era of Carlyle Luer 

  Karremans Lok, Adam Philip; Davis, Nicolas (2017)

  The era or Carlyle Luer, which currently comprehends the forty-two years since the publication of the first Icones Pleurothallidinarum in 1975, has witnessed a true revolution in the knowledge and understanding of the ...

• Novelties in Costa Rican Stelis (Orchidaceae: Pleurothallidinae): two new species and a new record in the "Dracontia group" 

  Karremans Lok, Adam Philip; Díaz Morales, Melissa (2017)

  Stelis dies-natalis and Stelis aenigma, belonging to a group of mostly Middle American species alternatively placed in genus Dracontia, are described and illustrated based on living material. They were both ...

• Four new species of Pleurothallis (Orchidaceae: Pleurothallidinae) from the Valle del Cauca Department in Colombia 

  Karremans Lok, Adam Philip; Rodríguez Martínez, Lizeth; Rincón Useche, Cristian (2017)

  Pleurothallis indecora, P. juvenilis, P. lueriana and P. queremalensis are described from material collected in the municipality of Dagua, department of Valle del Cauca, Colombia. The four species were found during field ...

• Two new species of Echinosepala (Orchidaceae: Pleurothallidinae) 

  Pupulin, Franco; Karremans Lok, Adam Philip; Belfort Oconitrillo, Noelia (2017)

  We describe and illustrate two new species of Echinosepala from Costa Rica, they are placed within a phylogenetic framework of the genus, and compared to their closest relatives. A short resume of the genus’ history is ...

• Vertical accretion and carbon burial rates in subtropical seagrass meadows increased following anthropogenic pressure from European colonisation 

  Samper Villarreal, Jimena; Mumby, Peter J.; Saunders, Megan Irene; Barry, Linda A.; Zawadzki, Atun; Heijnis, Hendrik; Morelli, Guia; Lovelock, Catherine E. (2018)

  Seagrass meadows serve as marine carbon sinks, though rates of carbon burial and sediment accretion may vary within and among seagrass meadows due to spatial and temporal variability in sedimentary and biophysical conditions. ...

• Lepanthes aures‐ursinae and L. vertebrata spp. nov. (Orchidaceae: Pleurothallidinae) from Panama 

  Bogarín Chaves, Diego Gerardo; Fernández Campos, Melania; Serracín Hernández, Zuleika (2017)

  Panama is still far from completing its orchid flora inventories, where large genera such as Lepanthes (Pleurothallidinae) reveal novelties regularly. Here, we describe and illustrate two new species of Lepanthes. Lepanthes ...

• A new species of Lepanthes (Orchidaceae: Pleurothallidinae) from Colombia with a large and protruding column 

  Moreno, Juan Sebastián; Vieira Uribe, Sebastian; Karremans Lok, Adam Philip (2017)

  A new species of Lepanthes from the Western Cordillera of the Colombian Andes, characterized by similar triangular sepals with a large and protruding column, is described and illustrated. The new species is similar to ...

• Proceedings of the ICSEM10 Costa Rica 

  Rojas Alvarado, Carlos Alonso (2020-02-28)

  Este documento corresponde con la memoria completa del X Congreso Internacional sobre Sistemática y Ecología de Mixomicetes (ICSEM10) celebrado en la Sede del Atlántico de la Universidad de Costa Rica entre el 25 y el 28 ...

• Recent origin and rapid speciation of Neotropical orchids in the world's richest plant biodiversity hotspot 

  Pérez Escobar, Oscar Alejandro; Chomicki, Guillaume; Condamine, Fabien L.; Karremans Lok, Adam Philip; Bogarín Chaves, Diego Gerardo; Matzke, Nicholas J.; Silvestro, Daniele; Antonelli, Alexandre (2017)

  The Andean mountains of South America are the most species‐rich biodiversity hotspot worldwide with c. 15% of the world's plant species, in only 1% of the world's land surface. Orchids are a key element of the Andean flora, ...

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