Details

Autor(en) / Beteiligte

• Giannini, T.C.
• Takahasi, A.
• Medeiros, M.C.M.P.
• Saraiva, A.M.
• Alves-dos-Santos, I.

Titel

Ecological niche modeling and principal component analysis of Krameria Loefl. (Krameriaceae)

Ist Teil von

• Journal of arid environments, 2011-09, Vol.75 (9), p.870-872

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Krameria plants are found in arid regions of the Americas and present a floral system that attracts oil-collecting bees. Niche modeling and multivariate tools were applied to examine ecological and geographical aspects of the 18 species of this genus, using occurrence data obtained from herbaria and literature. Niche modeling showed the potential areas of occurrence for each species and the analysis of climatic variables suggested that North American species occur mostly in deserted or xeric ecoregions with monthly precipitation below 140 mm and large temperature ranges. South American species are mainly found in deserted ecoregions and subtropical savannas where monthly precipitation often exceeds 150 mm and temperature ranges are smaller. Principal Component Analysis (PCA) performed with values of temperature and precipitation showed that the distribution limits of Krameria species are primarily associated with maximum and minimum temperatures. Modeling of Krameria species proved to be a useful tool for analyzing the influence of the ecological niche variables in the geographical distribution of species, providing new information to guide future investigations. ► We model 18 species of Krameria that occurs mainly on arid regions of the Americas. ► We examine geographical distribution through niche modeling and multivariate tools. ► Distribution limits are primarily associated with maximum and minimum temperatures. ► Our analyzes provide other new information to guide future investigations.