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Many recent studies in invasion science have identified species traits that determine either invasiveness or impact. Such analyses underpin risk assessments and attempts to prioritise management actions. However, the factors that mediate the capacity of an introduced species to establish and spread (i.e. its invasiveness) can differ from those that affect the nature and severity of impacts. Here we compare those traits correlated with invasiveness with those correlated with impact for Cactaceae (“cacti”) in South Africa. To assess impact magnitude, we scored 70 cacti (35 invasive and 35 non-invasive species) using the Generic Impact Scoring System (GISS) and identified traits correlated with impact using a decision tree approach. We then compared the traits correlated with impact with those identified in a recent study as correlated with invasiveness (i.e. native range size and growth form). We found that there is a significant correlation between native range size and both invasiveness and impact. Cacti with larger native ranges were more likely to become invasive (p=0.001) and cause substantial impacts (p=0.01). These results are important for prioritising efforts on the management of cactus species. Understanding when and why impact and invasiveness are correlated (as they appear to be for Cactaceae) is likely to be an important area of future research in risk assessment.
El objetivo de este trabajo fue determinar las especies de cocoideos (Hemiptera: Sternorrhyncha: Coccoidea) presentes en Sierra del Rosario y Sierra de los Órganos, Cordillera de Guaniguanico, provincia de Pinar del Río; así como, obtener la relación de sus plantas hospedantes. Se revisaron las Colecciones Zoológicas del Instituto de Ecología y Sistemática (CZACC), Cuba, las publicaciones cubanas sobre cocoideos y ScaleNet, que es una base de datos de los cocoideos del mundo. Se realizó una representación cartográfica de las localidades de recolección sobre un mapa a escala de 1:250000, utilizando el programa MapInfo Professional Versión 4.5. Se hallaron 53 especies de cocoideos, agrupados en 42 géneros y seis familias, de las cuales 11 especies se registraron por primera vez para el área de estudio: Coccus longulus (Douglas, 1887), Kilifia acuminata (Signoret, 1873), Parasaissetia nigra (Nietner, 1861), Protopulvinaria pyriformis (Cockerell, 1894), Pseudokermes vitreus (Cockerell, 1894), Aspidiella sacchari (Cockerell, 1893), Duplaspidiotus tesseratus (Grandpré & Charmoy, 1899), Pinnaspis aspidistrae (Signoret, 1869), Pinnaspis strachani (Cooley, 1899), Pseudoparlatoria parlatorioides (Comstock, 1883), y Eriococcus sp. Se relacionaron 54 especies de cocoideos y 36 familias de plantas hospedantes con nuevos registros de éstas. Palabras clave. Coccoidea, Sternorrhyncha, Hemiptera, plantas hospedantes, nuevos registros, Cuba.