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FAUNA AND FLORA IN THE BALTIC SEA

FAUNA AND FLORA IN THE BALTIC SEA. Prepared by the teacher of Biology R. Aglinskien e and 9th grade pupils. Every species, living in the Baltic Sea, are the descendants of various evolution periods: Ice Lake and Arctic Sea relics, North Atlantic immigrants.

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FAUNA AND FLORA IN THE BALTIC SEA

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  1. FAUNA AND FLORA IN THE BALTIC SEA Prepared by the teacher of Biology R. Aglinskieneand 9th grade pupils

  2. Every species, living in the Baltic Sea, are the descendants of various evolution periods: Ice Lake and Arctic Sea relics, North Atlantic immigrants. • Biologic variety in the Baltic Sea is small, because the water is too fresh for many marine species and to saline for freshwater species.

  3. At the moment there are about 6 thousand known species in the Baltic Sea, 4,7% of which are marine birds and mammals. Their life is sustained by comparatively small organisms freely floating in the water column, called Plankton (They comprise 44% of theknown species) or plants and animals living on the bottom of the sea, called Benthos (comprising 51% of known species).

  4. Aquatic organisms The Lithuanian coast is dominated by copepods— the saline water is usually abundant with the representatives of Mesocyclops or Thermocyclops groups and the diffusion zone of the curonian spit waters byfreshwater Pseudocalanusminutus or Acartialongiremis.

  5. Fauna and Flora in the bottom of the sea • There are more than 50 bottom invertebrate species foundon the coast, almost half (22species) of which are crustaceans, freely swimming on the bottom water layer. The most common species are Mussel (Mytiluselidus), Baltic macoma (MacomaBalthica) and Barnacle crustaceans (Balanusimprovisus).

  6. Birds • There are regularly found up to 30 different birdspecies on the Lithuanian coast. The most abundant, regularly seen and important to the environment are theones hibernating in the basin of the Baltic sea representatives: long-tailed Duck (Clangulahyemalis) and Velvet scoter.

  7. Fishes • There are 65 registered species of fishes in the Lithuanianwatersof Baltic Sea, 21 of which are freshwater, 33 marine and 11 migrating. Baltic herring(Clupeaharengusmembras), Baltic cod (Gadusmorhuacallarias) and flounder (Platichthysflesus)— some of the best fishes in the Lithuanian economy zone.

  8. Gadusmorhuacallarias Platichthysflesus

  9. Mammals • There are 5 species in the list of Baltic Sea mammals, which are constantly seen on the coast or in the sea. 3 of which belong to the pinnipeds (Grey Halichoerusgrypus), Pusahispida and South Atlantic simple Phocavitulinavitulina), and one guinea pig Phocoenaphocoena of thewhale family.

  10. Phocoenaphocoena Halichoerusgrypus

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