a slightly increasing trendP = 0.01
The NTI values also showed a slightly increasing trend with the latitude ( r = 0.53, P = 0.01; Fig. 5a ), suggesting a stronger environmental filtering effect in the polar regions.
The NTI values also showed a slightly increasing trend with the latitude ( r = 0.53, P = 0.01; Fig. 5a ), suggesting a stronger environmental filtering effect in the polar regions.