On the Methods of Resource Division in Grassland Bird Communities

摘要: The results of this study make possible the following generalizations. members avian communities resident in simple grassland habitats coexist by virtue differences habitat preferences and feeding behavior very tall vegetation height. sum these ecological is constant for all communities. Using only two indexes, height its standard deviation, it to predict (1) number species, (2) their ecology, (3) relative separation community which occupies habitat. As predictions are made South American on basis studied North America, as hold regardless grazing or irrigation programs, suggested that have a full quota species optimally adapted current environment.