Heterogeneity of water-retention capacity of forest and its influencing factors based on meta-analysis in the Beijing-Tianjin-Hebei region

Water retention is important in forest ecosystem services. The heterogeneity analysis of water-retention capacity and its influencing factors great significance for the construction functional areas, restoration vegetation, protection ecosystems Beijing-Tianjin-Hebei region. A total 1366 records concerning canopy layer, litter soil layer this region were obtained from 193 literature published 1980 to 2017. each analyzed, path was used investigate contribution three layers. results showed that mixed forests had highest capacity, followed by broad-leaved forests, coniferous shrub forests. In addition, no matter type, ranking high low. main leaf area index maximum daily precipitation (R2=0.49), coefficients 0.34 0.30, respectively. semi-decomposed (R2=0.51), coefficient 0.51. non-capillary porosity depth (R2=0.61), 0.60 0.38, This study verifies simulation water balance model or inversion remote sensing at site scale, provides scientific basis further impact global change on retention.