TY - JOUR N2 - One of the most interesting and relatively little-known water acosystems of ”Lasy Janowskie” Natural Landscape Park is its old ponds which have been in most cases excluded from intensive fisheries for many decades. Four of them were studied in 1996, 2005 and 2013, regarding their planktonic rotifer assemblages. The total of 60 rotifer taxa were observed in the plankton. The number of their species in individual reservoirs ranged from 7 to 21, while their density amounted to 33–775 ind. dm-3. As many as 21 of the species observed in individual water bodies and study periods belonged to dominants. While watching the changes occurring in the plankton during the period of 17 years , we were trying to determine which of those tiny reservoirs were inhabited by more sustainable rorifer assemblages and which ecological qualities were more closely related to such sustainability: species richness, its diversity, density, bio-mass, composition or domination structure. The results of the studies revealed slight variability of ecological properties in planktonic rotifer assemblages in the ponds composing large reservoir groups, and significantly higher variability of those qualities in ”single” ponds, not belonging to large complexes. L1 - http://journals.pan.pl/Content/107206/PDF-MASTER/2%20Demetraki.pdf L2 - http://journals.pan.pl/Content/107206 PY - 2015 KW - ponds KW - planktonic rotifers KW - Landscape Park “Lasy Janowskie” A1 - Demetraki-Paleolog, Andrzej A1 - Kolejko, Marcin A1 - Sender, Joanna PB - Oddział PAN w Lublinie VL - Vol XII DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Long-term changes in planktonic rotifer assemblages in the ponds of ”Lasy Janowskie” Landscape Park UR - http://journals.pan.pl/dlibra/publication/edition/107206 T2 - Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego ER -