Flora and similarities of a rocky outcrop in the Caatinga, eastern region of South America
Rocky environments show great habitat heterogeneity and very specific microclimatic characteristics that select for appropriately adapted floristic assemblages. A floristic survey was carried out on a rock outcrop in the driest portion of the Cariri Environmental Protection Area (APA) in Paraíba Sta...
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| Veröffentlicht in: | Caldasia 2024-01, Vol.46 (1), p.15-32 |
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| creator | Machado-Filho, Hermes Giraldo-Cañas, Diego Alonso Miranda de Melo, José Iranildo |
| description | Rocky environments show great habitat heterogeneity and very specific microclimatic characteristics that select for appropriately adapted floristic assemblages. A floristic survey was carried out on a rock outcrop in the driest portion of the Cariri Environmental Protection Area (APA) in Paraíba State, northeastern Brazil, to determine its similarity to other Caatinga sites. We recorded 128 species distributed among 103 genera and 52 families. Fabaceae, Convolvulaceae, Malvaceae, Euphorbiaceae, Asteraceae, Cactaceae, Bromeliaceae, Rubiaceae, and Poaceae were the most representative families in terms of numbers of species, with a high representation of herbaceous and shrub components and a predominance of typically Neotropical species, in addition to endemic taxa. Pectis linifolia L. (Asteraceae) is recorded here for the first time in the Paraíba state, Brazil. Similarity analysis evidenced that the study area, located in an extremely dry Caatinga zone, evidenced floristic relationships with other rocky outcrops in more humid areas, suggesting that habitat type is important for selecting specific groups, following the theory of refuges. |
| doi_str_mv | 10.15446/caldasia.v46n1.92476 |
| format | Article |
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| subjects | Asteraceae Biogeography Bromeliaceae Cactaceae Climate Convolvulaceae Endemic species Environmental protection Euphorbiaceae Fabaceae Flora Flowers & plants Geomorphology Heterogeneity Humid areas Malvaceae Outcrops Pectis linifolia Poaceae Rocky environments Rubiaceae Similarity |
| title | Flora and similarities of a rocky outcrop in the Caatinga, eastern region of South America |
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