Effects of Microplastics and Metal Pollution on Bivalves from the Bulgarian Black Sea Sublittoral, with Comments on their Adaptive Capacity * Author Pramatarov, Georgi I. Department of Biotechnology, Faculty of Biology, Sofia University “ St. Kliment Ohridski ”, 1164 Sofia, Bulgaria Author Tsvetanova, Elina R. Laboratory of Free Radical Processes, Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria Author Ilinkin, Vladimir M. National Society “ Ecological Engineering and Environmental Protection ”, Sofia, Bulgaria Author Andreeva, Madlena N. Laboratory of Free Radical Processes, Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria Author Alexandrova, Albena V. Laboratory of Free Radical Processes, Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria Author Chipev, Nesho H. Laboratory of Free Radical Processes, Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria text Acta Zoologica Bulgarica 2025 2025-01-15 77 1 107 119 https://doi.org/10.71424/azb77.1.002837 journal article 10.71424/azb77.1.002837 2603-3798 16652200

Table 2. Estimated values of the correlation coefficient (Spearman) of correlation between trace metal elements and indicators of oxidative stress in mussels (* - significant at p<0.05)

	Cd	Cu	Cr	Ni	Pb	Zn	Fe
LPO	-0.10	0.43*	-0.31	0.33	0.64*	-0.41	-0.07
PO	-0.29	-0.07	0.02	-0.23	0.67*	-0.27	-0.52*
GSH	-0.22	-0.41	-0.39	-0.65*	0.48	-0.35	-0.17
SOD	-0.11	0.64*	-0.31	0.33	0.29	-0.21	-0.06
CAT	-0.23	0.21	-0.28	0.44	-0.20	0.10	0.19
GPx	0.59*	0.32	0.33	-0.16	-0.39	0.19	0.04
GR	-0.42	0.01	-0.29	0.05	0.21	-0.25	-0.28
GST	0.22	0.11	0.24	-0.01	0.02	-0.15	0.45
AChE	-0.36	0.26	-0.08	0.51*	-0.18	0.25	0.31