Concept explainers
When two spiny mouse species coexist, Acomys cahirinus is nocturnal, whereas A. russatus is active during the day. When all A. cahirinus were removed from a research site, diurnal A. russatus mice became nocturnal. How were
To determine: The way in which resources are partitioned between the co-existed species, Acomys cahirinus and Acomys russatus. Also, determine the nature of the niche of Acomys russatus.
Introduction: The two species of Acomys, namely Acomys cahirinus and Acomys russatus, are co-existed species. Acomys cahirinus is a nocturnal species whereas Acomys russatus is a diurnal species.
Explanation of Solution
In this case, when all the Acomys cahirinus were removed from a particular site of research, all the species of Acomys russatus became nocturnal. It describes the concept of displacement of characters where the sympatric type of species diverge more than the allopatric ones.
When these species co-exist, they must differentiate their ecological niches to guard against dying out.
Also, Acomys russatus possesses a higher potential niche than its actual niche. It occurs because this species also exist at night, but this species has somehow adjusted their niche to survive in the surrounding environment.
Thus, both the species differentiate their resources to co-exist in a better way. Also, Acomys russatus adjusted its particular niche for its survival in the living environment.
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