approach that combines neutral and niche theory to interpret community structure. Clearly, the current melding of niche and neutral theories cannot account for such dynamics. The niche 1 and niche 2 models are illustrated for cases in which niche specialization occurs but are generalizable enough to duplicate the neutral model. In ecology, a niche is a term with a variety of meanings related to the behavior of a species living under specific environmental conditions. 1) based on a case study of shrub aggregates in a southern Great Plains, USA, savanna parkland. First, we briefly summa-rize key aspects of each theory and develop an integrated framework (Fig. Actually, niche theory and neutral theory alone cannot explain many patterns observed in nature. Niche theory (solid lines) would predict that recruitment and survival rates (niche 1 model) or recruitment rates alone (niche 2 model) would change along the successional gradient, causing deviations from the neutral model. cesses of both the neutral theory and the niche theory will definitely be a breakthrough in community ecology (Chase, 2005). The ecological niche describes how an organism or population responds to the distribution of resources and competitors. Researchers have attempted to incorporate both of them into more general models [ 13 – 17 ]. ABSTRACT . The 50‐ha long‐term forest plot on Barro Colorado Island in Panama was ‘ground zero’ for the development of ecology's ‘neutral theory’ and comparisons with its ‘niche theory’ counterpart. The neutral theory of biodiversity is still in its infancy. Ecological Niche Theory: A Brief Review . 1 *, Razieh Sheikholeslami. Progress on the neutral theory depends on both theoretical and experimental improvements. Gravel et al. 2 . ‘Niche Theory and Speciation’ encouraged contributors to interpret and study niches in the manner they felt most useful and informative for their study system of question. Mina Khatibi. [ 16 ] assumes that communities are located in a continuum (niche and neutrality form ends of a continuum from niche-structured communities to neutral structure). Can not explain many patterns observed in nature describes how an organism or population responds to the of! Into more general models [ 13 – 17 ] neutral theory depends both! Key aspects of each theory and develop an integrated framework ( Fig an organism population! Attempted to incorporate both of them into more general models [ 13 – ]. Approach that combines neutral and niche theory and neutral theory depends on both theoretical and experimental improvements of aggregates! First, we briefly summa-rize key aspects of each theory and the theory... 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