Strategies and Adaptations of PermanentGrasslands in Different Environments

Grassland biomes have developed a multitude of successful strategies and adaptations to various, often adverse environmental conditions through evolution.Grasslands have a wide tolerance to climatic conditions (temperature, precipitation) and can also tolerate temporary drought periods well.An important parameter for assessing drought tolerance of grass stands is the ratio of root biomass to above-ground phytomass, the R:S (root: shoot ratio).A higher value indicates the crop's adaptation to drought-induced stress.In permanent grasslands in Central Europe, we recorded a significant proportion of root biomass (6.69-10.31t ha -1 ) with an R:S ratio of 5.16.Other positive strategies include the ability of grasses to reproduce both vegetatively and generatively.Grass species exclusively prefer wind pollination; thus, they are not dependent on insect pollination.For different climatic zones, they have a suitable type of photosynthesis (C 3 or C 4 ).Grasslands are very well adapted to frequent grazing of phytomass or defoliation (mowing, fire), subsequently regenerating effectively.They are rich in high species biodiversity, contributing to their high eco-stability in agricultural landscapes.We also recorded grassland responses to the presence of heavy metals in the soil.Based on the bioconcentration factor (BCF < 1), grasslands (in Central Europe) acted as excluders of several heavy metals (Cd, Co, Cr, Pb, Mn, Cu, Fe, and Ni).These heavy metals are primarily accumulated in the soil and roots, with the above-ground part of the crop not being contaminated.Permanent grasslands are also effective in carbon sequestration and, based on several observations, are well adapted to the negative consequences of climate change.