Florística, fitossociologia e citogenética de angiospermas ocorrentes em inselbergues

• Autor(a) principal: Pitrez, Silvia Romeu
• Data de Publicação: 2006
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/8219
• topic: Inselbergue; Inselberg; Florística; Fitossociologia; Diversidade; Afloramento rochoso; Floristic; Phytossociology; Diversity; Rock outcrops; CIENCIAS AGRARIAS::AGRONOMIA

With the aim to characterize and compare flowering similarity and structure among four inselberg in the Paraíba State, it had been carried out floristic and phytosociological analysis of four inselberg at Brejo Paraibano and Agreste da Borborema. Areas were showed through places of ten fixed plots of 5m x 5m, distributed betwen Esperança, Fagundes, Pocinhos and Serraria's inselberg. Measurement were done in all angiosperms which were individuals to soil level, apart from climbing plants. It had been registered 219 species, distributed among 151 genus of 62 families, being the richest Leguminosae's family (23), Convolvulaceae and Euphorbiaceae (13), Poaceae and Rubiaceae (10). To the collected species, Anthurium affine, A. petrophilum, Cnidosculus urens, Crotalaria vitelina, Cyrtopodium polyphyllum, Encholirium spectabile, Euphorbia comosa, Marsdenia loniceroides, Melocactus ernestii, Orthophytum disjunctum, Prescottia phleiodes, Staelia virgata and Tibouchina grandifolia, ocurred in all studied areas. It was observed a higher similarity among Esperança and Fagundes inselbergs (20%), but Pocinhos' floristic had the lowest one. Species with the biggest VI were: Melocactus ernestii (36.7%) - Esperança; Encholirium spectabile (27.4%) – Pocinhos; Epidendrum cinnabarinum (28.9%)– Serraria and Euphorbia comosa (8.9%) - Fagundes. The biggest floristic diversity was observed in Fagundes (H ' = 2.81). Floristic diversity seems to be subject to the climatic changes, inselberg size, inclination and microhabitats quantity as well as by antropic action. Results showed a specific diversity increase from brejo to agreste, confirmed to data from other developed studies in the Brazilian Northeast Region.