Environmental Adaptability of Bryophytes in Rocky Desertification Areas of Northern Guangxi Province
摘要
[Objective] The northern Guangxi region is a typical karst rocky desertification area in China， where ecological restoration faces severe challenges. Current applied research on bryophyte-based ecological restoration mainly focuses on the Loess Plateau and the karst areas of Guizhou Province. However， studies focusing on the karst area of northern Guangxi Province—characterized by unique eco-geographical conditions （subtropical monsoon climate， favorable hydrothermal conditions， and limestone-dominated bedrock） and severe rocky desertification—remain relatively limited. In particular， research on the environmental adaptability of bryophytes and their functions and effectiveness in localized restoration practices is relatively scarce. [Methods] This study was conducted in the experimental area of Pingfeng Mountain in Qixing District， Guilin City. Three bryophyte species—Barbula unguiculata， Bryum paradoxum， and Hyophila involuta—were selected as the research objects. Through water-holding capacity test （for drought adaptation）， high-temperature resistance test （for surface high temperature adaptation）， acid and alkali resistance test （for soil and acid rain adaptation）， and erosion resistance test （for soil and water conservation assessment）， their environmental adaptability and ecological restoration potential were quantitatively evaluated. [Results] （1） All three bryophyte species exhibited significant water-holding capacity， with H. involuta showing the highest water-holding rate （581.71%）. This capacity enabled this species of bryophytes to effectively store water in the rocky desertification areas of northern Guangxi， contributing to improved soil moisture conditions. However， its high-temperature resistance was weak. After treatment at 60 ℃， some tissues turned black and necrotic. （2） B. unguiculata and B. paradoxum had water-holding rates of 408.88% and 389.82%， respectively， and demonstrated stronger resistance to high temperature， acid and alkali， and erosio