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Els briòfits de les fonts de la Serralada Litoral Central: composició específica i efecte dels paràmetres ambientals en la seva distribució
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| Abstract |
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| Springs, as a rather constant source of water, provide an adequate habitat for the establishment of bryophyte communities. The features of these waters play a major role in determining the specific composition of such communities. With the aims of discovering which communities of bryophytes can be found in the springs of the Serralada Litoral Central (Barcelona, NE Iberian Peninsula) and how the environment affects their composition we collected bryophyte samples from 56 springs located along this mountain range between January and July 2013. In addition, at each fountain, we measured sev- eral physical and chemical variables of their water. We identified 26 bryophyte species (5 liverworts and 21 mosses). By means of cluster analysis, springs were separated into three groups according to the specific composition of the communities of bryophytes, dominated respectively by Oxyrrhynchium speciosum , Eu - rhynchium cf. praelongum and Eucladium verticilatum . Compared to the other two groups, that dominated by E. verticillatum showed significantly higher values of mean annual temperature, water deficit, conductivity and sodium and magnesium concentrations, while mean annual precipitation was lower. The flora of bryo - phytes of the Serralada Litoral Centrals springs showed a similar composition as that previously described for these habitats in other comarable regions, although the flora was slightly impoverished due to the lack of clearly basophile species. Mean annual rainfall and temperature as well as certain correlated factors within the mountain range (such as altitude, the percentage of metamorphic rock and ion concentrations) seem to be the most important variables determining the distribution of the species. |
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English
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L'Atzavara | |
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2015
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25(2015), p. 105-116
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| Full text (open access) |
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