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Copyright of Lilloa is the property of Fundacion Miguel Lillo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Lilloa is the property of Fundacion Miguel Lillo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The bryophytes form a conspicuous group of the planet's flora, their ecological contribution in terms of species richness and coverage in many habitats is essential for the balance of ecosystem. In Colombia there is an approximate record of 715 species of Marchantiophyta (liverworts), which present their greatest richness in the Andean region. The study was carried out in the Chingaza National Natural Park - Suasie sector given its ecological and water importance for the surrounding municipalities. The main objective of this study was to determine the diversity of the liverwort community in the Suasie sector of the Chingaza NNP. For this, three surveys were made in transects of 2x50 m in an altitude gradient, in each transect the liverworts present from four phorophytes (trees and shrubs), chosen at random were sampled. The collected samples were identified for analysis of composition and diversity of the community. As a result, it was possible to demonstrate the variation in the composition and abundance of liverworts along the gradient, based not only on the estimated indices, but also on the association with the vegetation cover of each sampling site. With a total of 47 registered species, the high diversity of the sector under study is supported. In this way, the richness found in this gradient contributes to current and future conservation strategies for the park. [ABSTRACT FROM AUTHOR]

Acrocladium and Lepyrodon are pleurocarpic moss genera of Southern distribution. The species A. auriculatum and L. lagurus inhabit in the Fuegian region of Argentina as the dominant representatives of these genera. A detail description of their spores has not been reported up to now. The objective of this study is to compare the morphological characteristics of the spores and establish their diagnostic value in the systematic of these taxa. The spores were studied from herbarium specimens, with Light Microscope and Scanning Electron Microscope. The results showed differences between the size ranges and the type of spore ornamentation. These characteristics would add to and contribute to reinforce the morphological differences between species, highlighting the role of spores as an important source of systematic and biological information for these taxa. [ABSTRACT FROM AUTHOR]

The present study aims to characterize the bryophyte community on rotten logs in El Zafire biological station, Amazonas-Colombia. We sampled 100 plots on 20 trunks with different states of decomposition in two types of forest (terra firme and floodplain). 120 species are reported, 81 liverworts and 39 mosses, belonging to 55 genera (33 liverworts and 22 mosses) and 21 families (nine liverworts and 12 mosses). Four new species are registered for Colombia, 25 for the Colombia Amazon, and 41 for the department of Amazonas. In terms of richness, the floodplain presented a higher value than the terra firme forest. However, no significant difference was found between the two types of forests (Kruskal Wallis χ²c = 0.199, χ²t = 3.81). Diversity was higher in the floodplain (Shanon = 3.93) compared to the terra firme forest (Shanon = 3.67). The composition of the bryophyte communities shows differences between the two types of forests (similarity equal to 40 %). In the floristic study of the two types of forests of the biological station, the most common family was Lejeuneaceae, it represented 55.5 % of the liverworts sampled and 37.5 % of the total of the bryophyte species. [ABSTRACT FROM AUTHOR]

Nonvascular plants (hornworts, mosses and liverworts) represent an important component of biodiversity in Cuban natural ecosystems; however, their presence in mountain agroecosystems has been little explored. The present study characterized the bryological diversity in agroforestry systems of the southern part of the Nipe and Cristal mountain ranges. The study area included six farms in the Santiago de Cuba province, in the municipalities of Mella (Pinalito and El Ocho de Mella) and Segundo Frente (El Guisaso, La Carolina, Las Mercedes and La Esperanza). In each one, random collections were made in the different habitats found. The bryological flora in the agroecosystems studied was represented by 37 species, in 30 genera and 21 families, with a predominance of generalist groups with a wide geographic distribution. The highest diversity was recorded in mosses (62 % of the total). No hornworts or endemics were recorded. The greatest diversity and exclusivity of taxa was recorded at the El Ocho de Mella farm. Among the forest formations evaluated, the mesophytic evergreen forest and the secondary vegetation registered the highest values of diversity. The 70 % of the taxa were collected as epiphytes and the corticolous taxa were the most representative group. The 62 % of the registered taxa presented a preliminary category of threat. Agroforestry systems, structured in areas of crops and areas of forests, represent an alternative to conserve remnants of the bryological flora in Cuban mountainous ecosystems. [ABSTRACT FROM AUTHOR]

Copyright of Revista Mexicana de Biodiversidad is the property of Universidad Nacional Autonoma de Mexico, Instituto de Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Enlargement of the knowledge of geographical distribution for species of Bryophytes in Brazil. About 1.524 species of bryophytes are known in Brazil, distributed throughout the national territory. Floristic studies always reveal new occurrences, increasing the geographic distribution of several species. The aim of this work is to increase the knowledge of the geographical distribution of fifteen species of bryophytes for the states of Amazonas, Goiás, Rio de Janeiro and Rio Grande do Sul. Thirty samples were analyzed and nine species of mosses (Bryophyta) and six species of hepatic (Marchantiophyta) were identified. Two species were identified as new occurrences for the state of Rio Grande do Sul, one for the state of Amazonas and one for the state of Goiás. Eleven species have their geographical distribution expanded, being cited for the second time to the states of Amazonas, Rio de Janeiro and Rio Grande do Sul, increasing the knowledge of the geographic distribution of these taxa. [ABSTRACT FROM AUTHOR]

The mosses (Bryophyta) of Polylepis sericea (Rosaceae) forests from Mérida state (Venezuela). Herein, we publish a list of 90 species of mosses associated with Polylepis sericea forests in Mérida, Venezuela. The Leucobryaceae family is the most diverse with 14 species followed by Bryaceae, Bartramiaceae and Pottiaceae. The most diverse genera are Campylopus (14 species), Leptodontium (5), Breutelia (4), Bryum (4), Zygodon (4) and Racomitrium (3). In these forests the acrocarpic mosses are dominant: represented by 68 species, of which tall turfs are the most frequent (41.11%), followed by short turfs (24.44%) and extensive mats (8.89%). The phytogeographic analysis shows a predominance of neotropical elements (36%), over worldwide distributed elements (27%). Thirty-nine species are exclusive to Sierra Nevada of Mérida and 34 to Sierra de la Culata. Only 19% of the species is shared by both Sierras, indicating that there is high beta diversity in the studied forests. In Venezuela the bryoflora of Polylepis forests is more similar to the Bolivian forests. The species Drepanocladus sordidus (Amblystegiaceae), Myurella sibirica (Plagiotheciaceae) and Pleurochaete luteola (Pottiaceae) are added to Venezuelan moss flora, as well as nine new records for the bryoflora of the Mérida state. [ABSTRACT FROM AUTHOR]

The bryophytes of Estancia Cerro Paine, Torres del Paine National Park, Magallanes, Chile. We present a checklist of non-vascular plants for Estancia Cerro Paine, a private land located in the heart of Torres del Paine National Park. The list includes two hornworts, 29 liverworts and 93 moss species, making a total of 124 bryophyte species. We report 32 new bryophyte records for Última Esperanza Province, 11 for Magallanes Region, and three new records for Chile (Bryum apiculatum, Tortella fragilis and Valdonia microcarpa). The known distribution limits of six taxa are extended to the north, whereas for seven taxa the distribution limits are extended to the south. This is the first bryophyte species list made within the limits of Torres del Paine National Park. [ABSTRACT FROM AUTHOR]

Spores of Funaria hygrometrica and Entosthodon laxus (Funariaceae, Bryophyta) from Tierra del Fuego, Argentina.The Funariaceae Schwägr. is represented in Tierra del Fuego, by the genera Entosthodon Schwägr. with a single species, E. laxus, and Funaria Hedwig with, with F. hygrometrica var hygrometrica and F. hygrometrica var. fuegiana. They are analyzed and described, based on fresh and herbarium material sporophytes and spores of the species named, plus the variety of one of them. The observations were made with light and scanning electron microscopes. The sporophytes of both genera have capsules with different shape, color and length. In the spores differences are observed in the size and surface ornamentation. It can be concluded that the study of sporophytes, especially the analysis of the spores, provide significant characteristics that contribute to differentiation and systematics of these taxa. [ABSTRACT FROM AUTHOR]

Thamniopsis flexifolium is a new species from Yungas in the Northwest of Argentina. It is distinguished from congeners by the reddish purple plants, large teeth and sharp leaf margin and the cells of the sheet laterally thickened walls, sometimes prorate. Further, Lepidopilum muelleri is a new record for the country. Descriptions, distributions, illustrations, discussions to the taxa and the key are included for the species of the family Pilotrichaceae of the northwest of Argentina. [ABSTRACT FROM AUTHOR]

Copyright of Revista Mexicana de Biodiversidad is the property of Universidad Nacional Autonoma de Mexico, Instituto de Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The genus Pilopogon is represented by two species in Argentina: P. schilleri and P. guadalupensis. Pilopogon schilleri is known from Río Negro to Tierra del Fuego and P. guadalupensis from Jujuy. The latter is recorded for the first time for Argentina, and a lectotype is designated here. Descriptions, photomicrographs of specific characters, distribution maps and a key to Argentinean species are included. [ABSTRACT FROM AUTHOR]

Las briófitas son un elemento clave en los páramos, allí, la diversidad y biomasa es importante para la retención de agua, refugio para fauna y cobertura y protección del suelo. Muchas de las especies de briofitas de páramos se comparten con la franja superior del bosque montano andino, aunque hay especialistas que solo se encuentran en este ecosistema de alta montaña tropical por encima de los 3000 m. El páramo, se caracteriza por la morfología periglacial, la presencia constante de neblina, y los cambios bruscos de temperatura diaria [1]. La vegetación en el páramo es diversa y su distribución heterogénea caracterizada por un mosaico de comunidades que responden a condiciones climáticas particulares y a los cambios locales en la composición de los suelos. La condición poiquilohídrica y la resistencia a la radiación UV de las briofitas las convierten en uno de los grupos mejor adaptados a las condiciones paramo abierto. No obstante, algunas especies pueden verse afectadas por la variación del clima en escenario de cambio climático, sobre todo en localidades de páramo más frágiles como las turberas. En este trabajo se listan los musgos dominantes de los páramos abiertos, de las turberas alto andinas y de los bosques parameros a partir de los trabajos realizados en los páramos de Venezuela y se discute acerca de la morfología que les permite a los musgos adaptarse a las condiciones particulares de cada uno de estos ambientes. La flora de musgos de páramo es muy rica, cerca del 30 % del total de los musgos de países andinos megadiversos como Venezuela [2], siendo este ambiente una pequeña porción de los territorios de esos países. El conocimiento de la flora del páramo es aún fragmentaria ya que solo unas pocas localidades han sido muestreadas a fondo y todavía se necesitan más inventarios para conocer su diversidad, ecología y tomar medidas para la conservación de este importante grupo de plantas en este frágil ecosistema. [ABSTRACT FROM AUTHOR]