Factors affecting the dominance hierarchy dynamics in a hummingbird assemblage  

作　　者：Ubaldo MARQUEZ-LUNA Carlos Lara Pablo CORCUERA Pedro Luis VALVERDE 

机构地区：[1]Doctorado en Ciencias Biologicas y de la Salud, Universidad Autonoma Metropolitana-lztapalapa, Ciudad de Mexico, Mexico [2]Centro de Investigacion en Ciencia Biologicas, Universidad Autonoma de Tlaxcala. Km 10.5 Autopista Tlaxcala-San Martin Texmelucan, San Felipe Ixtacuixtla, Tlaxcala, Mexico [3]Departamento de Biologia, Universidad Autonoma Metropolitana-lztapalapa, Ciudad de Mexico

出　　处：《Current Zoology》2019年第3期261-268,共8页动物学报（英文版）

摘　　要：Intra and in terspecific competiti on for n ectar play an imports nt role in hummingbird communities. Larger sized species usually exclude smaller species from the rich floral resources. However, it has been recently postulated that the competitive advantages of a large body size decline as the evolutionary distance between the contending species in creases. In this study, we analyzed dominance hierarchy dynamics in a hummingbird assemblage in central Mexico. By monitoring hummingbird territories established in three plant species through 1 year, we assessed the effects of energy within territories and the territory owners identity in the frequency of inter and intraspecific encounters. We also evaluated if these factors affect the dominance of larger species when they compete against smaller distantly related contenders. Our results show that their frequency of intraspecific encounters was related with the identity of the territory's owner. On the contrary, the frequency of interspecific encounters was related with both the territory and the identity of the territory's owner. We did not find a significant difference between the number of encounters dominated by larger and smaller species and their conte nders. However, the in crease in genetic dista nee between contenders was positively associated with a higher frequency of encounters dominated by small hummingbirds.Our results showed that the ecological factors and evolutionary relationships among contenders play important roles in the dominance hierarchy dynamics.

关 键 词：AGONISTIC behavior COMPETITION HUMMINGBIRDS resource quality TERRITORIALITY 

分 类 号：Q[生物学]