Table 2 List of Crustacea recorded in the study area with special focus on alien species and their origin. P-C : Ponto-Caspian, NW-A : Northwest Atlantic, NW-P: Northwest Pacific. The abundances of individuals in each habitat type are based on estimates.

Amphipoda

Chelicorophium robustum (Sars, 1895)¹⁶

P-C

Deadwood/ Sand

16

Dikerogammarus villosus (Sowinsky, 1894)¹⁷

P-C

Deadwood

16

Gammarus tigrinus (Sexton, 1939)¹⁸

NW-A

Deadwood/ Sand

31

Gammarus duebenii (Liljeborg, 1852)¹⁹

 –

Sand

2

Gammarus zaddachi (Sexton, 1912)²⁰

 –

Deadwood/ Sand

13

Decapoda

Eriocheir sinensis (Milne Edwards, 1853)²¹

NW-P

Deadwood

11

Mysida

Limnomysis benedeni (Czerniavsky, 1882)¹⁰

P-C

Stone revetment (submerged)

1

Paramysis lacustris (Czerniavsky, 1882)¹⁰

P-C

Stone revetment (submerged)

36