Overview of historical physico-chemical and biological data from the Wel lakes – a support for peleolimnological analyses Andrzej Hutorowicz 1 Agnieszka Napiórkowska-Krzebietke 1 Agnieszka Pasztaleniec 2 Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund 1 Inland Fisheries Institute, Olsztyn Institute of Environmental Protection 2 Institute of Environmental Protection, Warszawa

Lake Temperature Oxygen Secchi Disc Chemical content of water (Ca, Na, K, Mg, Fe, SiO 2, P-PO 4, N-NO 3, N-NH 3 ) Dąbrowa Wielka – surface – surface – surface, bottom, 3 station Dąbrowa Mała Rumian Zarybinek Tarczyńskie Grądy Lidzbarskie Kiełpińskie Hartowieckie ZwiniarzNo data-

LakeZooplankton Bathymetric plan with area occupied by submergend and emergend vegetation Dąbrowa Wielka plan 1959; vegetation (?) Dąbrowa Mała ; vegetation (?) Rumian – 2 stations 1963; vegetation (?) Zarybinek ; vegetation Tarczyńskie ; vegetation (?) Grądy ; vegetation (?) Lidzbarskie ; vegetation (?) Kiełpińskie ; vegetation (?) Hartowieckie ; vegetation (?) ZwiniarzNo data

Lake Classification of primary productivity of a lake Dąbrowa Wielka+ Dąbrowa Mała+ Rumian+ Zarybinek+ Tarczyńskie+ Grądy+ Lidzbarskie+ Kiełpińskie+ Hartowieckie+ ZwiniarzNo data

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen Dąbrowa Wielka oCoC Temperature

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund O 2 -sinks in the L. Dąbrowa Wielka

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature L. Dąbrowa Mała

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund O 2 -sinks in the L. Dąbrowa Mała

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature L. Lidzbarskie

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund O 2 -sinks in the L. Lidzbarskie

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature L. Rumian

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund O 2 -sinks in the L. Rumian

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature L. Grądy

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature J. Tarczyńskie

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature J. Zarybinek

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Depth [m] mg O 2 /dm 3 Oxygen oCoC Temperature J. Hartowieckie

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Visibility of Secchi disc during August [m] 1964/

The estimation of primary productivity was carried out two ways: by analyzing chosen factors influencing the production - 10 factors:  fertility of drainage basin,  lake situation in the basin of the river,  water exchange in a lake,  fertility of a main influent drainage basin,  phosphorus content,  nitrogen content,  calcium content  potassium content,  grade of stability of the lake,  active bottom area of the lake  hypolimnetioc oxygen content changes depending on the grade of stability by evaluation some of primary production indicators – 3 factors:by evaluation some of primary production indicators – 3 factors:  changes in calcium contents from spring pick to summer minimum lake,  changes in potasium content  water transparency in the lakes differing by range of epilimnion Patalas K The method of classification of primary productivity of a lake by point system, applied to the lakes of Węgorzewo district. Rocz. Nauk Rol. 77-B-1, Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Classification of Primary Productivity of a Lake by Point System (CPP)

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Classification of Primary Productivity of a Lake (1968)

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Dąbrowa Wielka Dąbrowa Mała Rumian Zarybinek Tarczyńskie Grądy Lidzbarskie Kiełpińskie Hartowieckie Zwiniarz Estimated for Polish method - Metric "Chlorophyll a"Y Ch Polish method - Metric "Total Biomass"Y Bm Polish method - Metric "Biomass of Cyanoprokaryota"Y CY Phytoplankton Metric for Polish LakesPMPL Polish method - Metric "Chlorophyll a"Y Ch Polish method - Metric "Total Biomass"Y Bm Polish method - Metric "Biomass of Cyanoprokaryota"Y CY Phytoplankton Metric for Polish LakesPMPL

Submergend vegetation Dominant species Vegetation ranges [average ±SD; maximum] Estimated colonization (Z) Dąbrowa Wielka Elodea canadensis Ceratophyllum demersum Batrachium circinatum 4,00 ±0,94; 5,01,34 Dąbrowa Mała Elodea canadensis Batrachium circinatum Fontinalis antypiretica 4,38 ±0,80; 5,01,07 Rumian Elodea canadensis Myriophyllum spicatum Ceratophyllum demersum 3,21 ±1,38; 5,00,86 Zarybinek Elodea canadensis Ceratophyllum demersum Charophceae 1,77 ±2,25; 2,50,62 Tarczyńskie Potamogeton sp. Charophceae 0,77 ±1,12; 3,50,45

Polsko-Norweski Fundusz Badań Naukowych / Polish-Norwegian Research Fund Submergend vegetation Dominant species Vegetation ranges [average ±SD; maximum] Estimated colonization (Z) Lidzbarskie Elodea canadensis Potamogeton sp. 1,26 ±1,81; 5,00,79 Kiełpińskie Elodea canadensis Potamogeton sp. Ceratophyllum demersum 3,07 ±2,05; 7,51,04 Hartowieckie Potamogeton sp. div. Ceratophyllum demersum 0,76 ±1,08; 2,50,32 Grądy Ceratophyllum demersum Charophceae 0,79 ±1,13; 3,40,31