The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform
Christine Cargill - One of the best experts on this subject based on the ideXlab platform.
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nuevos registros de antocerotes anthocerotophyta rothm
2011Co-Authors: Yoira Riveraqueralta, Christine Cargill, Ex Stotler, Investigaciones BotanicasAbstract:The hornworts (Anthocerotophyta) are poorly studied in Cuba, compared to Mosses and Liverworts (Bryophyta and Marchantophyta). This study is based on the revision of herbarium material; literature consultation and the use of the optic and electronic microscopy of Scanning (JEOL LSM 6400 SEMs). After this study, the species: Anthoceros hispidus Steph. (Anthocerotaceae) and Phaeoceros oreganos (Aust.) Steph. (Notothyladaceae) were recognized and recorded for the first time in Cuba. Also, this study offered a characterization of them, photos and
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nuevos registros de antocerotes anthocerotophyta rothm ex stotler crand stotler en cuba new records of hornworts anthocerotophyta rothman
2011Co-Authors: Christine CargillAbstract:The hornworts (Anthocerotophyta) are poorly studied in Cuba, compared to Mosses and Liverworts (Bryophyta and Marchantophyta). This study is based on the revision of herbarium material; literature consultation and the use of the optic and electronic microscopy of Scanning (JEOL LSM 6400 SEMs). After this study, the species: Anthoceros hispidus Steph. (Anthocerotaceae) and Phaeoceros oreganos (Aust.) Steph. (Notothyladaceae) were recognized and recorded for the first time in Cuba. Also, this study offered a characterization of them, photos and
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nuevos registros de antocerotes anthocerotophyta rothm ex stotler crand stotler en cuba new records of hornworts anthocerotophyta rothman stotlar crand ex stotlar in cuba
Ciencia en su PC, 2011Co-Authors: Yoira Riveraqueralta, Christine CargillAbstract:Los antocerotes (Anthocerotophyta) son un grupo poco estudiado en Cuba, si se compara con el nivel de conocimiento que se tiene de los musgos y las hepaticas (Bryophyta y Marchantophyta). En el presente estudio, a partir de la revision de material de herbario, la consulta de literatura especializada y el empleo de la microscopia optica y electronica de barrido (JEOL LSM 6400 SEMs) se registran y se reconocen por primera vez en Cuba las especies Anthoceros hispidus Steph. (Anthocerotaceae) y Phaeoceros oreganus (Aust.) Steph. (Notothyladaceae); ademas, se ofrece su caracterizacion, fotos y fotomicrografias de las esporas. Se mapifica su distribucion y se ofrecen datos sobre la autecologia de las especies, asi como propuestas para la conservacion de las especies estudiadas. ABSTRACT The hornworts (Anthocerotophyta) are poorly studied in Cuba, compared to Mosses and Liverworts (Bryophyta and Marchantophyta). This study is based on the revision of herbarium material; literature consultation and the use of the optic and electronic microscopy of Scanning (JEOL LSM 6400 SEMs). After this study, the species: Anthoceros hispidus Steph. (Anthocerotaceae) and Phaeoceros oreganos (Aust.) Steph. (Notothyladaceae) were recognized and recorded for the first time in Cuba. Also, this study offered a characterization of them, photos and spores photomicrographs. Distribution maps are shown and the data on autecology species are offered; as well as proposals for the conservation of the species studied.
Liang Song - One of the best experts on this subject based on the ideXlab platform.
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a combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest
American Journal of Botany, 2020Co-Authors: Liang Song, Guodi YuanAbstract:PREMISE The distribution and performance of bryophyte species vary with vertical gradients, as a result of changes in environmental factors, especially light. However, the morphological and physiological drivers of bryophyte distribution along forest vertical gradients are poorly understood. METHODS For 18 species of Mosses and Liverworts distributed among three vertical microhabitats (ground, tree trunk, and branch, variance in 28 morphological and photosynthetic functional traits was comparatively analyzed among the microhabitats and bryophyte life-forms in a subtropical cloud forest in Ailao Mountain, Yunnan, southwestern China. Principal component analysis (PCA) was used to summarize trait differences among bryophyte species. RESULTS In contrast to trunk and ground dwellers, branch dwellers tended to reduce light interception (smaller leaf and cell sizes, lower chlorophyll content), protect against damage from intense irradiation (higher ratios of carotenoids to chlorophyll), raise light energy use (higher photosynthetic capacity), and cope with lower environmental moisture (pendant life-forms, thicker cell walls). The PCA showed that ecological strategies of bryophytes in response to levels of irradiation were specialized in branch dwellers, although those of ground and trunk dwellers were less distinct. CONCLUSIONS Environmental filtering shaped the combination of functional traits and the spatial distribution of bryophytes along the vertical gradients. Bryophyte species from the upper canopy of cloud forests show narrow variation in functional traits in high-light intensity, whereas species in the lower vertical strata associated with low-light intensity used contrasting, but more diverse ecological strategies.
Guodi Yuan - One of the best experts on this subject based on the ideXlab platform.
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a combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest
American Journal of Botany, 2020Co-Authors: Liang Song, Guodi YuanAbstract:PREMISE The distribution and performance of bryophyte species vary with vertical gradients, as a result of changes in environmental factors, especially light. However, the morphological and physiological drivers of bryophyte distribution along forest vertical gradients are poorly understood. METHODS For 18 species of Mosses and Liverworts distributed among three vertical microhabitats (ground, tree trunk, and branch, variance in 28 morphological and photosynthetic functional traits was comparatively analyzed among the microhabitats and bryophyte life-forms in a subtropical cloud forest in Ailao Mountain, Yunnan, southwestern China. Principal component analysis (PCA) was used to summarize trait differences among bryophyte species. RESULTS In contrast to trunk and ground dwellers, branch dwellers tended to reduce light interception (smaller leaf and cell sizes, lower chlorophyll content), protect against damage from intense irradiation (higher ratios of carotenoids to chlorophyll), raise light energy use (higher photosynthetic capacity), and cope with lower environmental moisture (pendant life-forms, thicker cell walls). The PCA showed that ecological strategies of bryophytes in response to levels of irradiation were specialized in branch dwellers, although those of ground and trunk dwellers were less distinct. CONCLUSIONS Environmental filtering shaped the combination of functional traits and the spatial distribution of bryophytes along the vertical gradients. Bryophyte species from the upper canopy of cloud forests show narrow variation in functional traits in high-light intensity, whereas species in the lower vertical strata associated with low-light intensity used contrasting, but more diverse ecological strategies.
M O Hill - One of the best experts on this subject based on the ideXlab platform.
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a comparison of distribution patterns in british and irish Mosses and Liverworts
Journal of Bryology, 2013Co-Authors: C D Preston, Colin Harrower, M O HillAbstract:AbstractWe classified 747 species of British and Irish Mosses into 10 clusters, based on their recorded distribution in 10×10 km grid squares (hectads). We generated the clusters in a two-stage process using the CLUSTASPEC program, the method that we had earlier used for British and Irish Liverworts and hornworts. The clusters are named after the species with distributions which are most similar to those of the clusters as a whole. Clusters of widespread species (Bryum capillare), southern, lowland species (Rhynchostegium confertum), widespread calcifuges (Pleurozium schreberi), upland species (Blindia acuta), and montane calcifuges (Kiaeria falcata) closely match clusters recognised in the Liverworts. The remaining clusters (Tortella flavovirens, Weissia longifolia, Mnium stellare, Encalypta alpina, Mnium lycopodioides) are less similar. The classification of Mosses into 15 and 20 clusters generates additional clusters of hyperoceanic and montane Mosses which also resemble liverwort clusters. The influen...
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the geographical relationships of the british and irish flora a comparison of pteridophytes flowering plants Liverworts and Mosses
Journal of Biogeography, 1999Co-Authors: C D Preston, M O HillAbstract:Aim To compare the wider distribution of the pteridophytes, flowering plants, Liverworts and Mosses recorded as natives of Britain and Ireland, and to assess the proportion and distribution of species in each group which belong to predominantly extra-European genera. Location The species native to the British Isles are considered in relation to their distribution in the Northern Hemisphere, and predominantly extra-European genera are identified by consideration of the distribution and centre of numerical diversity of the genera worldwide. Methods A recent classification of the pteridophytes, flowering plants, Liverworts and Mosses into floristic elements is used in a quantitative study of the distribution of species in the four groups, the patterns of occurrence being compared by standardized residuals. Results Mosses and Liverworts have more northerly distributions than the flowering plants in the Northern Hemisphere; pteridophytes show an intermediate pattern. There are marked differences in the longitudinal ranges of the groups south of the Boreal biome, with vascular plants tending to be confined to Europe or western Eurasia whereas cryptogams are more likely to occur additionally in North America or have a circumpolar distribution. The proportion of predominantly extra-European genera is particularly high in the pteridophytes and the Liverworts and in these groups the rich hyperoceanic flora of the British Isles is almost entirely composed of species in genera that attain their centre of diversity in the tropics. Main conclusions Major taxonomic groups show different distribution patterns, reflecting their rates of evolution and powers of dispersal. The flowering plants, as the least mobile and most rapidly evolving group, have a greater proportion of their species in the European and Eurosiberian elements and a higher proportion of species from extra-European genera in the more northerly elements.
Yoira Riveraqueralta - One of the best experts on this subject based on the ideXlab platform.
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nuevos registros de antocerotes anthocerotophyta rothm
2011Co-Authors: Yoira Riveraqueralta, Christine Cargill, Ex Stotler, Investigaciones BotanicasAbstract:The hornworts (Anthocerotophyta) are poorly studied in Cuba, compared to Mosses and Liverworts (Bryophyta and Marchantophyta). This study is based on the revision of herbarium material; literature consultation and the use of the optic and electronic microscopy of Scanning (JEOL LSM 6400 SEMs). After this study, the species: Anthoceros hispidus Steph. (Anthocerotaceae) and Phaeoceros oreganos (Aust.) Steph. (Notothyladaceae) were recognized and recorded for the first time in Cuba. Also, this study offered a characterization of them, photos and
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nuevos registros de antocerotes anthocerotophyta rothm ex stotler crand stotler en cuba new records of hornworts anthocerotophyta rothman stotlar crand ex stotlar in cuba
Ciencia en su PC, 2011Co-Authors: Yoira Riveraqueralta, Christine CargillAbstract:Los antocerotes (Anthocerotophyta) son un grupo poco estudiado en Cuba, si se compara con el nivel de conocimiento que se tiene de los musgos y las hepaticas (Bryophyta y Marchantophyta). En el presente estudio, a partir de la revision de material de herbario, la consulta de literatura especializada y el empleo de la microscopia optica y electronica de barrido (JEOL LSM 6400 SEMs) se registran y se reconocen por primera vez en Cuba las especies Anthoceros hispidus Steph. (Anthocerotaceae) y Phaeoceros oreganus (Aust.) Steph. (Notothyladaceae); ademas, se ofrece su caracterizacion, fotos y fotomicrografias de las esporas. Se mapifica su distribucion y se ofrecen datos sobre la autecologia de las especies, asi como propuestas para la conservacion de las especies estudiadas. ABSTRACT The hornworts (Anthocerotophyta) are poorly studied in Cuba, compared to Mosses and Liverworts (Bryophyta and Marchantophyta). This study is based on the revision of herbarium material; literature consultation and the use of the optic and electronic microscopy of Scanning (JEOL LSM 6400 SEMs). After this study, the species: Anthoceros hispidus Steph. (Anthocerotaceae) and Phaeoceros oreganos (Aust.) Steph. (Notothyladaceae) were recognized and recorded for the first time in Cuba. Also, this study offered a characterization of them, photos and spores photomicrographs. Distribution maps are shown and the data on autecology species are offered; as well as proposals for the conservation of the species studied.
