Sampling-event data of vascular plant species on microsites caused by catastrophic windthrow in a mesic broad-leaved forest (Kaluzhskie Zaseki State Nature Reserve)

1. Plantae
   rank: kingdom
2. Tracheophyta
   rank: phylum

The Kaluzhskie Zaseki State Nature Reserve is located in the eastern European part of the broadleaved forest zone in the south-east of the Kaluga Oblast where it borders with the Orel Oblast and the Tula Oblast. The Reserve was established in 1992 to protect the old-growth multi-species broadleaved forests growing on the site of the former Zaokskaya Abatis belt, which was the line of defence of the Muscovite state in the 16–18th centuries. The stands of broadleaved forests are dominated by the common oak (Quercus robur), which is more than 300 years old in some patches. The Reserve is located on the Russian platform, in the northwestern part of the Central Russian Upland, in the watershed of the Oka and Vytebet rivers (a tributary of the Zhizdra River). The prevailing elevation varies from 150 to 250 m above the sea level, the highest point is 275 m asl. The erosive hilly terrain is formed by a gently sloping cover of glacial moraine and is densely dissected by ravines, gullies and rivers. The average annual temperature is 4.4 °C. The average annual precipitation is 700 mm.