The seasonal development of testate amoebae and ciliates was studied in two peatbogs with different pH values. The values of numbers of testate amoebae were seasonally changeable. The highest numbers of testate amoebae were found in spring and summer with the dominance of Areclla vulgaris, Nebela barbata and Cucurbitella sp. The density during the autumn was the lowest. The highest numbers of ciliate communities were noted in spring and autumn during the mass development of small Scuticociliatida and Colpodea. The density throughout the summer was the lowest. Generally, in the present studies the abundance of testate amoebae was correlated with the abundance of bacteria and heterotrophic flagellates. The density of bacterivorous Colpodea, Scuticociliatida and Cyrtophorida correlated positively with the density and biomass of bacteria. In low pH peatbog relations between microbial loop components were stronger.

Artificial small water reservoirs existing over peatbogs of Łęczyńsko-Włodawskie Lakeland have high ecological value. Planktonie rotifer communities of the reservoirs are characterized by high species diversity, presence of rare species as well as high abundance of periphytic and benthic-pcriphytic forms. Low nutrients concentrations of studied reservoirs confirmed low total rotifers density, presence of indicatory species and high ratio of algaevorous to detritivorous species. The analysis of domination structure of planktonie rotifers showed very low stability of their community and high vulnerability for changes of habitat conditions.

The aggregate of various taxonomic groups of microorganisms colonising living organisms is known as the microbiome. The plant microbiome encompasses a wide network of biological, chemical and metabolic interactions between the plant and microorganisms (mainly algae, bacteria and protozoa). The relationships between microbes and peatland plants, particularly carnivorous plants, are a very interesting subject that is still little understood. Microbes colonising carnivorous peatland plants may be present in their traps or on the surface of the plant. Previous research on the relationships between the microbiome composition of carnivorous plants and the external factors influencing it directly and indirectly is still inadequate. There is a lack of review articles analysing the current state of knowledge regarding carnivorous plant–microbiome interactions. This review of the literature is a collection of data on the functioning of the microbiome of carnivorous plants growing in peatland ecosystems. In addition, it summarises the available information on host–microorganism relationships.