Use of exotic conifers as nesting sites by Black-faced Ibis (Theristicus melanopis melanopis) in an urban area of southern Chile

作者：Raimilla Victor; Rau Jaime R^*; Niklitschek Edwin J

来源：Studies on Neotropical Fauna and Environment, 2015, 50(2): 130-136.

DOI：10.1080/01650521.2015.1057425

• exotic trees
• Osorno
• Threskiornithidae
• tree use
• urban ecology
• urban nesting

We studied the influence of seven habitat variables, including tree species, for nesting by the Black-faced Ibis (Theristicus melanopis melanopis) in an urban area of southern Chile. Variables were compared between 30 trees with nests and 30 randomly selected trees without nests. Nests were found in big trees with large diameters and heights. However, the only variable found to have a significant effect on site selection was tree species, which explained 57.9% of data variability (deviance) and suggested a selection of exotic conifers, mainly Douglas fir (Pseudotsuga menziesii). Tree species and tree diameter also had significant effects upon the number of nests per tree, jointly explaining 68.9% of data deviance. Our results suggest that in urban environments the Black-faced Ibis uses larger trees that provide greater nest stability and protection. Investigamos la influencia de siete factores sobre el uso del habitat de nidificacion de la bandurria Theristicus melanopis melanopis en un area urbana del sur de Chile. Comparamos las mediciones de estas variables entre 30 arboles-nido y 30 arboles seleccionados al azar. Los nidos de T. melanopis fueron encontrados en arboles de gran DAP y altura. Sin embargo, encontramos que la especie de arbol fue la unica variable explicativa que tuvo un efecto significativo sobre el uso de habitat, utilizando coniferas exoticas, principalmente Pseudotsuga menziesii. La variable especie de arbol explico el 57.9% de la variabilidad (desviacion) de los datos. Encontramos ademas que esta variable, junto con el diametro del arbol, tuvo efectos significativos sobre el numero de nidos por arbol, explicando en conjunto el 68.9% de la devianza de los datos. Nuestros resultados sugieren que, en ambientes urbanos, T. melanopis usa grandes arboles que proveen estabilidad y proteccion a los nidos.

• 出版日期2015-5-4