Abstract：
Most studies of terrestrial bryophytes as natural substrates for photosynthetic microorganisms have been performed in the polar regions, where bryophytes are an important part of the ecosystem. As they remain green throughout the year, bryophytes may also be an ideal substrate for epiphytic organisms in temperate regions. The present study investigated the colonization potential and diversity of microalgae on selected plant species in riparian forest and spruce monoculture in a temperate region. It examines whether the presence of algae is related to substrate humidity, the micromorphology of gametophyte or the seasonal availability of substrate. The taxonomic diversity of algae was studied. Cyanobacteria and green algae were cultured on BG-11 agar medium, while diatoms were identified in permanent diatomaceous slides. The alpha- and beta-diversity indices were calculated, and the communities were compared using Bray-Curtis distances and multidimensional correspondence analyses. Our findings indicate that the largest number of alga species were diatoms; however, their presence was only observed in riparian forest and was associated with high humidity. Both aerophilic and freshwater taxa were noted, the latter carried by water from nearby aquatic ecosystem. Green algae were present in both phytocoenoses and humidity appears to have no substantial effect on the degree of colonization; their diversity was low and the group consisted of terrestrial taxa. In two bryophytes growing at the highest humidity, cyanobacteria were only identified in culture. The key factor influencing the degree of microalgae colonization was the humidity of the substrate, which was related to the distance from water.
摘要：
陆生苔藓植物作为光合微生物的天然底物的大多数研究都是在极地地区进行的，苔藓植物是生态系统的重要组成部分。当他们全年保持绿色时，苔藓植物也可能是温带地区附生生物的理想底物。本研究调查了微藻在温带地区河岸林和云杉单一栽培中选定植物物种的定殖潜力和多样性。它检查藻类的存在是否与基质湿度有关，配子体的微观形态或底物的季节性可用性。研究了藻类的分类多样性。蓝藻和绿藻在BG-11琼脂培养基上培养，而硅藻在永久性硅藻土载玻片中被发现。计算了α-和β-多样性指数，并使用Bray-Curtis距离和多维对应分析对社区进行了比较。我们的发现表明，藻类种类最多的是硅藻；然而，它们的存在仅在河岸森林中观察到，并且与高湿度有关。注意到需氧和淡水类群，后者由附近水生生态系统的水携带。绿藻在植物群落中都存在，湿度似乎对定殖程度没有实质性影响；它们的多样性很低，该组由陆地类群组成。在两个湿度最高的苔藓植物中，蓝藻仅在培养物中被鉴定。基质的湿度是影响微藻定殖程度的关键因素,这与离水的距离有关。
