If we assume that every organism has as its main goal to access resources and that access is allowed through a semiotic process of meaning, knowledge about the relationship between the environment and the organism grows dramatically. Ecology may represent a science with a superior capacity to describe reality when compared with social and economic sciences as recently stressed by Paul Ehrlich (2002), especially when discussing cultural evolution (extragenic information) as the engine of relationships between humans and the environment.
Recently ecology has celebrated new paradigms like metabolic ecology, based on the study of allometric rules (Enquist et al. 1998, Brown et al. 2004, Marquet et al. 2004, Tilman et al. 2004, Cottingham and Zens 2004), while on the other hand becoming more and more visible is an ecological science based on cognitive processes and the social dimension of humans considered as the key species and responsible for ecosystem changes worldwide.
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