Now several grassland birds are declining, and Dr. Haas suspects that it is because of the switch to nonnative grasses.
Several grassland sites and one native prairie site located nearby were characterized as reference points for examining biodiversity and soil quality attributes of the treatments.
The former sites were characterized by the occurrence of several grassland birds along with a variety of generalist species, some of which required the presence of trees, while the latter sites were less diverse but usually with a higher proportion of steppe-dependent birds in their composition.
To feed the nationally growing population, the government expanded cultivated in several grassland areas across Inner Mongolia, substantially altered the structure and function of Inner Mongolia as a social-ecological system (Su et al. 2005; Wu et al. 2015).
In addition to its own pastures, the administration of the Kenesh aiylnyi okrug also rented several grassland plots belonging to the 'national forest fund' from the leskhoz 'Kyzyl Unkur' to provide its members with sufficient pasture grounds (CLPKU-KLM 2013; respondents KJ 2013 and EA 2013/2014).
An increase in productivity induced by elevated CO2 has been documented in several grassland FACE experiments (e.g., [15, 56 58]), while actual productivity changes were impacted by interactions among the elevated CO2 concentration, climate [59], soil conditions [60], nitrogen availability [61 64], and community composition [57, 65].
Shade is tolerable for many species of the forests, but several grassland species do not grow as well in shade.
Several Imperata cylindrica grasslands were also found.
One criticism is that many of these types of experiments are not managed according to common agricultural practices in managed European grasslands (several cuts/grazing events per year and appropriate fertilization) (Wrage et al. 2011), thus lowering the transferability of results obtained from studies of experimental plant communities to actual managed grasslands.
They harvested the grassland just several days before, so the grassland seemed to be very flat.
