Karmezi Maria, Krigas Nikos, Papatheodorou Efimia M, Argyropoulou Maria D
Department of Zoology, School of Biology, Faculty of Sciences, Aristotle University, 54124 Thessaloniki, Greece.
Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization Demeter, 57001 Thessaloniki, Greece.
Plants (Basel). 2023 May 31;12(11):2193. doi: 10.3390/plants12112193.
We aimed to explore how the invasion of the alien plant affects soil microbial and nematode communities in Mediterranean pines () and maquis (). In each habitat, we studied soil communities from the undisturbed core of both formations and from their disturbed peripheral areas that were either invaded or not by . Most studied variables were affected by habitat type, while the effect of was different in each habitat. Compared to maquis, the soil in pines had higher silt content and lower sand content and higher water content and organic content, supporting a much larger microbial biomass (PLFA) and an abundance of microbivorous nematodes. The invasion of in pines had a negative effect on organic content and microbial biomass, which was reflected in most bacterivorous and fungivorous nematode genera. Herbivores were not affected. In contrast, in maquis, organic content and microbial biomass responded positively to invasion, raising the few genera of enrichment opportunists and the Enrichment Index. Most microbivores were not affected, while herbivores, mostly increased. The plants colonizing the peripheral areas in maquis probably offered a qualitative food source to microbes and root herbivores, which in pines was not sufficient to affect the much larger microbial biomass.
我们旨在探究外来植物的入侵如何影响地中海松树林（）和马基群落（）中的土壤微生物和线虫群落。在每个栖息地，我们研究了这两种植被未受干扰的核心区域以及受干扰的周边区域（无论是否被入侵）的土壤群落。大多数研究变量受栖息地类型影响，而在每个栖息地中的影响有所不同。与马基群落相比，松树林中的土壤粉砂含量更高、砂含量更低、含水量和有机含量更高，支持了更大的微生物生物量（磷脂脂肪酸）和大量的食微生物线虫。松树林中的入侵对有机含量和微生物生物量有负面影响，这在大多数食细菌和食真菌线虫属中有所体现。食草动物未受影响。相比之下，在马基群落中，有机含量和微生物生物量对入侵呈积极响应，增加了少数富集机会主义者属和富集指数。大多数食微生物动物未受影响，而食草动物（主要是）数量增加。在马基群落周边区域定居的植物可能为微生物和根食草动物提供了优质食物来源，而在松树林中，这种食物来源不足以影响大得多的微生物生物量。
