Interannual Variations in Species Richness and Quantitative Parameters of Macrozoobenthos in Floodplain Lakes of the Khoper Nature Reserve

Influence of environmental factors on the interannual variability of macrozoobenthos of the floodplain lakes

“…This result confirmed good consistency of the ordination diagram with the dataset. Quantitative characteristics (total abundance, abundance of the dominant) and species richness of communities were associated with the flood period, proven earlier by other methods (Prokin and Seleznev, 2018), as well as with water temperature (Fig. 4).…”

“…The only exceptions were the lakes M. Goloe and B. Goloe, where the temperature in 2013 was higher by 0.7 °C than in warm 2011. Apparently, this could be due to a change in the lake's groundwater supply regime (Prokin, 2014;Prokin and Seleznev, 2018). During the study period, the temperature of the bottom water layer of all lakes regularly increased from the "profundal" to the shoreline zone (Appendix: khoper_env_ by_biotope.csv).…”

“…Regard must be paid to the Lake B. Goloe and the Lake M. Goloe, the first one was connected with the Khopyor river through a natural channel, the second was connected to the first lake. During the period of study, these lakes were flooded annually, their area was 100% of the mean annual, and the flood period increased from 25 to 45 days (Prokin, 2014;Prokin and Seleznev, 2018).…”

Macroinvertebrates of fluctuating lakes in Mongolia

“…Orog Nuur Lake was surveyed in 2010 and in 2013-2018, and Taatsiin Tsagaan Nuur Lake in 2014-2018 The lake areas on the study date were calcula ted using the Landsat 4-5 TM C1 Level 2, Landsat 8 OLI / TIRS C1 Level 1, 2 satellite images (Earth Explorer, 2019). For all selected images, atmosphe ric correction was performed using the SCP module of the Quantum GIS program.…”

“…For shallow lakes, it was found that the trigger mecha nism, which provides the transition from a turbid to a clear state, is a sharp drawdown of water levels in dry summers (van Geest et al, 2007;Scheffer and Jeppesen, 2007). For floodplain lakes, it is shown that the flood phase determines the quantitative cha racteristics of macrozoobenthos communities (Prokin and Seleznev, 2018). In hypersaline lakes, the salinity changes associated with the water content of the year are responsible for one or another alternative state of the ecosystem, including those at the level of gene ral species richness (Shadrin, 2013).…”