A carregar...
3 resultados
Resultados da pesquisa
A mostrar 1 - 3 de 3
- The MOVECLIM – AZORES project: Bryophytes from Pico Island (2012)Publication . Gabriel, Rosalina; Morgado, Leila N.; Coelho, Márcia C. M.; Aranda, Silvia C.; Henriques, Debora; Pereira, Fernando; Borges, Paulo A. V.; HESPANHOL, HELENA; Sergio, Cecilia; Ah-Peng, ClaudineABSTRACT: In September 2012, Pico Island was surveyed along an elevational transept starting on Manhenha, at 10 m a.s.l., and ending on the Pico Mountain caldera, at 2200 m a.s.l. to obtain a systematic inventory of the bryophytes living in natural environments. A total of twelve sites were examined, separated by 200 m elevation steps. At each site, two 10 m x 10 m plots were established within 10-15 m from each other, and within each plot, three 2 m x 2 m quadrats were randomly selected and thoroughly sampled for bryophytes using microplots of 10 cm x 5 cm, collected to paper bags. Six substrates were explored within each quadrat: rock, soil, humus, organic matter, tree bark and leaves/fronds; three replicates were made for each substrate, whenever available and colonized by bryophytes, totalling a maximum of 18 microplots per quadrat, 54 microplots per plot, 108 microplots per site and 1296 microplots on the 12 sites of Pico Island. It was possible to collect two thirds of the maximum expected number of microplots (N=878; 67,75%), resulting in 4896 specimens, the great majority of which (n=4869) were identified to the species/subspecies level. Overall, it was possible to identify 70 moss’ and 71 liverwort’ species and subspecies. The elevation levels both with a greater number of microplots and higher richness of species were those between 600-1000 m a.s.l., coinciding with the native forest plots. The study contributed to improve the knowledge of Azorean bryophyte diversity and distribution at both local and regional scales, including the recording of new taxa for Pico Island and the Azores.
- Spore morphology of the Macaronesian endemic moss Alophosia azorica (Renauld & Cardot) Cardot (Polytrichopsida, Polytrichaceae)Publication . Morgado, L.N.; Gabriel, Rosalina; Sergio, CeciliaIntroduction. This article provides a detailed analysis of the spore morphology and ultrastructure of Alophosia azorica (Renauld & Cardot) Cardot, a Macaronesian endemic moss of the family Polytrichaceae, reviews its morphological characters, and clarifies its life strategy. Methods. The specimens used in this study came mainly from the bryophyte sections of the herbaria of the University of the Azores (AZU) and the University of Lisbon (LISU), with fresh samples also collected in the field. Observations were made and measurements taken of the stem, leaves, rhizoids, capsule and setae, for comparison with published reports. Sporophytes from five specimens of Alophosia azorica were separated to study spore morphology using light and scanning electron microscopy. Key results and conclusions. The specimens investigated in this study exhibited the typical characteristics assigned to the species in previous studies. The examined spores are isomorphic monads, heteropolar with a subcircular amb, spheroidal in polar view, convex-plane in equatorial view, with psilate exospore and presence of a perispore with microechinate ornamentation, and are very small. Alophosia azorica is considered a colonist sensu stricto due to its small, abundant spores, the production of sporophytes across two seasons, and the presence of asexual propagules, indicating a moderate reproductive effort.
- New national and regional bryophyte records, 79Publication . Ellis, Leonard; Alataş, M.; Ali, Sk. N.; Alvarez, Denise; Aponte-Rojas, Angélica; Atwood, John; Batan, Nevzat; Bednarek-Ochyra, H.; Cano, María; Cimerman, Z. L.; Colotti, Maria; Costa, M. J. F.; Erzberger, P.; Espinoza-Prieto, Bryan; Evangelista-dos-Santos, M.; Ezer, T.; Fatková, Lucie; Fedosov, V. E.; Gabriel, Rosalina; Gil, Lorenzo; Goffinet, Bernard; Graulich, A.; Hsu, Yu-Chwen; Kiebacher, T.; Kocjan, J.; Krajsek, S. S.; Kubesová, S.; Kučera, J.; Larraín, J.; Lavocat-Bernard, E.; Mamontov, Y.; Mir-Rosselló, Pere; Morales, C. P.; Natcheva, R.; Negritto, M. A.; Ospino-C, Juan; Paul, M.; Papp, B.; Pócs, Tamás; Rodríguez-Quiel, Eyvar; Rogosic, Marta; Ramírez-Roncallo, K.; Roque, A. A.; Sabovljević, A. D.; Sabovljević, M. S.; Schäfer-Verwimp, Alfons; Šegota, V.; Sergio, Cecilia; Sette-de-Souza, P. H.; Singh, D.; Širka, Pavel; Sotiaux, A.; Suárez, Guillermo; Tubanova, Dolgor; Yao, Kuei-Yu; Winter, Gerhard