Lake Region
F3 PRIMARY PRODUCTION RATE [g C m-2 yr-1](7) Station 1, January-December 1977*1 1978*1 1979*1 1982*2 Gross pr 470 570 990 740 Respirat(140)*3 (170) (300) 220 Net prod (330) (400) (690) 520 *1 O2 method. *2 13C method. *3 ( ) is estimated.