| dc.description.abstract | Understanding species niche is vital to prevent species extinction as it has a great impact on the abundance
of the species. The present study was conducted to determine the changes of species niche with the
changes in environmental variability. Here species dynamics over the time was simulated using a dynamic
population model within in a parameter range. The findings of the present study revealed that changes
environmental variance affects the abundance of species, alter their mean niche position, and change the
niche overlap pattern with each other as well as the niche width of species. Similarly, it has a great impact
on competition among the species. It was found that at low environmental variance there has been less
fluctuation in the abundance of various species, but when the variance is being increased gradually then the
abundance also fluctuates more. Again, at low variance the position niche of species remained more or less
in the same mean, but at high variance the mean niche of species become changed, so their niche position
has also been changed. Over again, when the environmental noise was low then the niche overlap of the
species was very high. At high variance the niche overlap decreased. When two species compete for the
same limiting resource then overlap occurs. Hence, when environmental variance was very low, the niche
width of species was also very low, which indicates that the lower the variance the narrower the niche
width. Furthermore, when the variance was low then there was no competition but with the increasing of
variance, the rate of competition was also increased. Finally, the study concluded that change in the
environmental variability affects the community dynamics and species niche structure. | en_US |
