Aero-terrestrial algae are ecologically and economically valuable bioresources contributing to carbon sequestration, sustenance of soil health, and fertility. Compared to aquatic algae, the literature on subaerial algae is minimal, including studies of distinctive habitats such as forest soils, agricultural fields, deserts, polar regions, specific subaerial zones, artificial structures, and tropical soils. The primary goal here was to identify the gaps and scope of research on such algae. Accordingly, the literature was analyzed per sub-themes, such as the “nature of current research data on terrestrial algae,” “methodological approaches,” “diversity,” “environmental relationships,” “ecological roles,” and “economic significance.” The review showed there is a high diversity of algae in soils, especially members belonging to the Cyanophyta (Cyanobacteria) and Chlorophyta. Algal distributions in terrestrial environments depend on the microhabitat conditions, and many species of soil algae are sensitive to specific soil conditions. The ecological significance of soil algae includes primary production, the release of biochemical stimulants and plant growth promoters into soils, nitrogen fixation, solubilization of minerals, and the enhancement and maintenance of soil fertility. Since aero-terrestrial habitats are generally stressed environments, algae of such environments can be rich in rare metabolites and natural products. For example, epilithic soil algae use wet adhesive molecules to fix them firmly on the substratum. Exploring the ecological roles and economic utility of soil and other subaerial algae could be helpful for the development of algae-based industries and for achieving sustainable soil management.

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对土壤藻类作为具有高度生态和经济意义的重要土壤生物成分的批判性评论

气陆藻类是具有生态和经济价值的生物资源，有助于固碳、维持土壤健康和肥力。与水生藻类相比，关于陆生藻类的文献很少，包括对森林土壤、农田、沙漠、极地地区、特定陆上区域、人工结构和热带土壤等独特生境的研究。这里的主要目标是确定此类藻类研究的差距和范围。因此，按照子主题对文献进行了分析，例如“当前陆地藻类研究数据的性质”、“方法论”、“多样性”、“环境关系”、“生态作用”和“经济意义”。审查显示土壤中的藻类具有高度多样性，特别是属于蓝藻门（蓝藻门）和绿藻门的成员。陆地环境中的藻类分布取决于微生境条件，许多土壤藻类对特定的土壤条件敏感。土壤藻类的生态意义包括初级生产、向土壤中释放生化兴奋剂和植物生长促进剂、固氮、溶解矿物质以及增强和维持土壤肥力。由于航空-陆地栖息地通常是压力环境，因此这种环境中的藻类可能富含稀有代谢物和天然产物。例如，表土土壤藻类使用湿的粘附分子将它们牢固地固定在基质上。探索土壤和其他陆生藻类的生态作用和经济效用可能有助于藻类产业的发展和实现可持续土壤管理。