Studies on the Diversity and Vertical Distribution of Bryophytes in Pingdingshan of Xiaoxing'an Ling

PurposeStudies on the diversity and vertical distribution of bryophytes in Pingdingshan of Xiaoxing'an Ling were carried out so as to provide a scientific reference for ecological restoration in the area.

MethodBased on the investigations of bryophytes on eight different altitudes and vegetations, the composition of bryophytes and the effects of vertical distribution on their diversity in Pingdingshan of Xiaoxing'an Ling were studied.

Results(1) We recorded 107 species in total, including 91 mosses (90 species and 1 variety) and 16 liverworts, which accounting for 31.60% and 12.21% that of the Heilongjiang Province respectively. (2) The dominant families and genera of mosses account for 39.07% and 37.21% of the total. The dominant families and genera of liverworts account for 64.29% and 42.86% of the total. The diversity of tree moss is the highest at 0 m from the ground, with a total of 18 species. (3) α-diversity analysis showed that the maximum at 989 m of Shannon-Wiener index was 2.63, and the minimum at 304 m was 0.75. Pielous uniformity index is relatively stable, from 0.27 to 0.72. (4) The analysis of the β-diversity showed that the largest difference between the two places of 810 m and 1 429 m is β_c=50.00 and β_T=2.00. (5) Seventeen major ground bryophyte species were divided into three groups according to CCA analysis (canonical correspondence analysis).

ConclusionThe species diversity of bryophytes in in Pingdingshan of Xiaoxing'an Ling is rich, and species diversity shows bimodal variation with altitude. The distribution of bryophytes in the middle and low altitude mountains is positively correlated with disturbance.