3.1 | Climatic suitability
Our results based on GEA indicated
that, BIO2 (Mean diurnal range) had an effect only on the genetic basis
of local adaptations in François’ langur, whereas BIO13
(Precipitation of wettest month) had a significant effect on the genetic
basis of local adaptations in White-headed langur (Table 1; Figure 3).
From the LIG to the year 2050, the permutation of the importance of
variables indicated that BIO13 (Precipitation of wettest month) and
BIO18 (Precipitation of Warmest Quarter) for François’ langur, and the
BIO11 (Mean Temperature of Coldest Quarter), BIO13 (Precipitation of
wettest month), and BIO14 (Precipitation of Driest Month) for
White-headed langur (Table1).
We found that the area of climatic suitability for François’ langur
decreased by 4.8% between the LIG and the LGM. During a warming event
associated with the LGM to the present, the amount of climatic
suitability for François’ langur increased by 0.3% (Table 1; Figure 5).
The area of climatic suitability available to White-headed langur
decreased by 5.1% between the LIG
and the LGM, and then increased by 11.7% from LGM to the present (Table
1; Figure 5). The projection of our maxent model indicates that climatic
suitability for François’ langur will likely increase and contract for
White-headed langur over the next 30 years (2020-2050), resulting in a
27.9% increase for François’ langur and a 33.8% decrease for
White-headed langur (Table 1). Also, human activities are expected to
result in an additional 29.2% for François’ langur and 23.4% loss of
suitable habitat for White-headed langur (Table 1 & Supporting
Information Figure S4).