Biomass Amounts of Spontaneous Vegetation on Post-Coal Mine Novel Ecosystem in Relation to Biotic Parameters

The amounts of biomass in ecosystems depends on the efficiency of energy gathering in organic chemical bonds by autotrophs, which are the only organisms that synthesize inorganic compounds into organic compounds structured into biomass. Plant species composition in the vegetation patch and the associated microorganism communities are factors that affect the matter and energy flow in the ecosystem. In human-established or severely transformed novel ecosystems, in particular in mineral-poor, oligotrophic habitats, the knowledge about the biotic parameters related to the biomass amount is very limited. The presented studies were performed on post-black coal mining heaps that provide the mineral material habitat. The following biotic parameters, the vegetation plant species composition of the distinguished vegetation types, soil organic matter, soil enzymatic activity, soil fauna presence, and the functional aspect of soil carbon release concerning amount of biomass are considered. The aim of this research was to analyze the influence of the selected biotic factors on the biomass amount in the vegetation patches of the studied sites. The results showed that the effect of the species composition diversity on the biomass amount is complex. The influences of soil enzyme activity on biomass amount are dependent on the enzyme presence and the vegetation type. Similarly, the impact of the soil organic matter (SOM) on the biomass amount is significantly different and dependent on vegetation type. The relationship between the amount of biomass and respiration showed that the biomass of the dominant plant species is positively correlated with the biomass amount in the studied vegetation types.