Before revision: - Aim: Explaining and formulating the pattern of the species-area relationship, SAR, that fits better the real data in a small area. - Location: Barro Colorado Island (BCI), Panama. - Time period: No specific time period. - Major taxa studied: tropical tree species - Methods: We consider the geometric position of individuals of species, and base on that  we find the probability of observing at least one individual of the species , then we apply a translation of the well-studied problem of mixed salt-water in a tank to describe the formula of SAR. -
After revision: - Aim: Explaining and formulating the pattern of the species-area relationship, log-log linear, semi-log linear, among others. These patterns mainly explain the species-area relationship for large areas, and for the small area, they provide significant differences from real data. We consider the geometric position of individuals of species, and base on that we find the probability of observing at least one individual of the species , then we apply a translation of the well-studied problem of mixed salt-water in a tank to describe the formula of SAR. -