苔藓植物相互作用的研究进展

综述了苔藓植物种内和种间正相互作用、种内和种间竞争、生态位与共存等的研究现状及其进展.苔藓植物常为严酷环境中的优势植物，并在保持水分和获取光及养分资源两方面存在权衡.因严酷环境中竞争的重要性相对较低，苔藓植物的正相互作用较为多见.然而，在苔藓植物种内、种间及其与维管植物之间，均不乏竞争的实例.在严酷性较低的环境如过湿的泥炭地中，竞争的重要性增加.多种苔藓植物间可存在竞争等级，该等级往往随环境的变化而变化.随机过程、物种的殖民本质以及更新策略的差异可导致苔藓植物生态位的重叠与共存，但竞争导致生态位分化也是苔藓植物共存的机理之一.苔藓植物不应简单地归类于耐压-杂草型生活史策略者，竞争仍是构建某些苔藓植物群落及其与维管植物共存群落的重要因子之一.

Research advances on interactions among bryophytes.

This paper summarized the present research status and advances on the intra- and inter-specific positive interaction, intra- and inter-specific comp etition, niche, and coexistence of bryophytes. Bryophytes are generally the domi nant plants in harsh environments, and there is a trade-off between their water retention and light and nutrient resource availability. Because of the lesser importance of competition in harsh environments, the positive interaction among bryophytes is common, but the intra- and inter-specific competition among bryop hytes and the competition between bryophytes and vascular plants are not rare. C ompetition hierarchy may exist among some bryophytes, but often changes with env ironments. In the process of bryophyte community formation, the random process, nature of colonization, and difference in regeneration strategy can result in th e niche overlap and coexistence of bryophytes, and the niche differentiation res ulted from competition is also one of the mechanisms for bryophytes coexistence. Bryop hytes should not be simply classified as stress tolerated-ruderal life history strategists, and competition is still one of important factors for constructing some bryophyte comm unities and vegetations co-existed by bryophytes and vascular plants.