Aspects of the ecology of Calotropis procera (Apocynaceae) in an area of dry forest altered by works of the Integration Project of the San Francisco River in Mauriti, CE

Juliano Ricardo Fabricante Marina Nabuco Araújo de Oliveira José Alves de Siqueira Filho About the authors

The species Calotropis procera (Aiton) WT Aiton has its first records in Brazil pointed to 1900. Currently she is in almost the entire country, particularly in the Northeast. The objectives of this study were: (i) assess the abundance of individuals of C. procera, (ii) evaluate reproductive aspects of the same, (iii) verify the existence of allelopathic action of its tissue, (iv) estimate the area of occurrence of the taxon. The study area is located in the municipality of Mauriti, CE (07º24'07,9"S and 038º42'43,6"W). The average number of individuals per plot was 11.9±1.9. The average number of fruits per plant was 92.20±33.89, and seeds per fruit was 371.26±4.88. The plant extracts showed interfere with germination and growth of other species. C. procera showed wide probability of occurrence in Brazil, mainly in Caatinga, Cerrado and Restinga. This combination of attributes makes C. procera a trespasser on potential areas of extreme importance for the conservation of Brazilian biodiversity.

biological invasion; invasive alien; silk flower

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