Consulta: subjectFacets:"Bryophyte"
Registros recuperados: 4
Data/hora: 11/06/2024 08:11:34

Reproductive output of mosses under experimental warming on Fildes Peninsula, King George Island, maritime Antarctica
Provedor de dados: 97
Autores: Casanova-Katny,A.; Torres-Mellado,G. A.; Eppley,S. M.
BACKGROUND: Mosses dominate much of the vegetation in the Antarctic, but the effect of climatic change on moss growth and sexual reproduction has scarcely been studied. In Antarctica, mosses infrequently produce sporophytes; whether this is due to physiological limitation or an adaptive response is unknown. We studied the effect of experimental warming (with Open Top Chambers, OTCs) on sporophyte production on Fildes Peninsula, King George Island for four moss species (Bartramia patens, Hennediella antárctica, Polytrichastrum alpinum, and Sanionia georgicouncinata). To determine whether reducing cold stress increases sexual reproduction as would be predicted if sex is being constrained due to physiological limitations, we counted sporophytes for these four...
Tipo: Journal article
Palavras-chave: Antarctica; Bryophyte; Climate change; Fildes Peninsula; King George Island; Sporophyte.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100013

Floristic composition and diversity of Amazonian rainforest bryophytes in the state of Acre, Brazil
Provedor de dados: 36
Autores: Costa,Denise Pinheiro da.
Bryophyte diversity in Amazonian Brazil is high, presently recorded at 514 species distributed among 36 families and 89 genera. Comparisions of species richness among the Amazonian states of Brazil suggests that the bryoflora of Acre is still underestimated, presently recorded at 106 species distributed among 33 families and 63 genera. After two field trips, the diversity increased 50% showing that the bryoflora is still poorly known. Collection data and comments on morphology, ecology and distribution are given for sixty-two species of bryophytes collected in the state of Acre, Brazil, which are new (fifty-two species) or interesting floristic records (ten species). Microlejeunea crenulifolia (Gottsche) Steph. and Stictolejeunea balfourdii Mitt. are new...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversity; Bryophyte; Acre; Brazil.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000300006

Bryophytes on rocky outcrops in the caatinga biome: a conservationist perspective
Provedor de dados: 39
Autores: Silva,Joan Bruno; Germano,Shirley Rangel.
In the state of Paraíba, Brazil, there is an abundance of rocky outcrops, which are typical elements of the semi-arid landscape. Those outcrops provide refuge to species with morphological adaptations to stressful climates and to rare communities of plants, including bryophytes. Nevertheless, there have been no studies of bryophytes in such habitats in the state. Therefore, this work aimed to inventory bryophytes on two outcrops in the municipality of Puxinanã, in Paraíba, addressing some of the ecological aspects of survival in xerophytic environments. Samples were collected once every two weeks from February 2010 to May 2011. The usual techniques of bryophyte sampling and herbarium preservation were employed. We recorded 21 bryophyte species (six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bryophyte; Inselberg; Morphological adaptations; Nonvascular flora; Semi-arid; Northeastern Brazil.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400023

Effects of light and nutrients on different germination phases of the Cosmopolitan moss Bryum argenteum Hedw. (Bryaceae)
Provedor de dados: 52
Autores: Silva,Adaíses Simone Maciel da; Pôrto,Kátia Cavalcanti; Simabukuro,Eliana Akie.
The influence of light and nutrients on the different germination phases of Bryum argenteum spores was studied. The following treatments were used: distilled water and nutrient solution under light (12 h) and continuous darkness. The spores germinated when exposed to light, independent of both medium used. Under darkness, the spores swelled and became chlorophyllous. In the presence of nutrient solution, the germination occurred earlier (after two days) when compared to the distilled water (after more than three days). Nutrients were needed to complete the last germination phase in the majority of spores and to provide the protonemal growth.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bryophyte; Physiology; Germination; Protonema; Light; Nutrients.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400003