دورية أكاديمية
Floristic similarity and dispersal syndromes in a rocky outcrop in semi-arid Northeastern Brazil
| العنوان: | Floristic similarity and dispersal syndromes in a rocky outcrop in semi-arid Northeastern Brazil |
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| المؤلفون: | Elainne Cristina Silva Costa, Sergio de Faria Lopes, José Iranildo de Miranda Melo |
| المصدر: | Revista de Biología Tropical, Vol 63, Iss 3, Pp 827-843 (2015) |
| بيانات النشر: | Universidad de Costa Rica, 2015. |
| سنة النشر: | 2015 |
| المجموعة: | LCC:Biology (General) |
| مصطلحات موضوعية: | inselbergs, similitud florística, diasporas, pasillo xérico, América del Sur, Biology (General), QH301-705.5 |
| الوصف: | Floristic studies provide valuable information on species richness in a region, and are particularly important if these areas belong to less studied environments, such as rocky outcrops, that may increase our knowledge. An important aspect for species colonization includes the mechanisms of diaspores dispersal in each community; these are essential to understand its structure, dynamics, and the regeneration process, and constitute an important tool for conservation. We developed a floristic survey on a granite-gneiss outcrop with the objective to increase the knowledge on plant diversity, through a floristic similarity analysis and detection of dispersal syndromes of sampled species, in a semi-arid region of Brazil. The fieldwork included collection and observation of the botanical material in locoduring a period of 12 months. A total of 161 species belonging to 127 genera and 50 families of angiosperms were recorded. Fabaceae, Asteraceae and Convolvulaceae were the most representative families in number of species. Allophylus quercifolius(Mart.) Radlk. (Capparaceae) and Lafoensia pacariA. St.-Hil. (Lythraceae) represented new records for the State of Paraiba. The autochoric syndrome was the most representative, with 51.5 % of the recorded species; the anemochory was the second most representative syndrome with 26.7 % of the species; and finally the zoochory, representing 22.3 % of the species. The floristic similarity dendrogram showed the formation of three well-defined groups, whose area with the highest value (J = 33.2) is located in a Caatinga region called Cariri Paraibano, while the lowest value observed (J = 5.2), occurred in a settled area in two geomorphological units, a crystalline complex and a plateau region. These results may be due to the varying topographic conditions and edaphic heterogeneity arising from the specific geological formation of the region. These results yet demonstrate that, in rocky outcrops, abiotic syndromes represent an effective dispersion of its diaspores, favoring plant specie's colonization dynamics. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Spanish; Castilian |
| تدمد: | 0034-7744 |
| Relation: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442015000300827&lng=en&tlng=en; https://doaj.org/toc/0034-7744 |
| URL الوصول: | https://doaj.org/article/a3b74ceedf6d46f4a0b0264ebcb5d35c |
| رقم الأكسشن: | edsdoj.3b74ceedf6d46f4a0b0264ebcb5d35c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 00347744 |
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