Diversity of hydrobionts in delta of the Ile river in changing human impact.
Delta of the Ile River is one of the biggest wetlands of Asia. State of ecosystems of the delta and adjacent territories was reported as threatened about 30 years ago. Eastern part of the delta was included in protected area of the Ili-Balkhash State Nature Reserve in 2018 only. Analysis the modern diversity of water organisms was the aim of our investigation. Samples collecting had been done in spring and sum- mer 2019 with common methods of hydrobiological investigations. Different kinds of habitats like river, floodplain lakes and the lakeside were investigated. High concentrations of ammonia were revealed in different part of the delta as well as in the lake in spring. Checklist of phytoplanktons, zooplanktons and benthos consisted from 31, 2 and 12 species respectively. Fishes were presented with 16 alien species; between them 6 short living and noncommercial fish species were the most common in the delta. The modern diversity of hydrobionts is much less in contrast to the period before strong human impact, and indicate poor state of water ecosystems of the delta. The obtained data is started point for long term monitoring and assessment of effectiveness of wildlife management and actions for rehabilitations of natural ecosystems of the Ile delta.