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Y. ARUGA: Primary Production in the Indian Ocean II
daily rate of primary production in the whole Indian Ocean together with the distribution
in summer and winter. PRASAD, BANERJI and NAIR (1970) described the production in
the Indian Ocean with a figure showing the distribution of the daily rate of primary
production in the Ocean. KOBLENTZ-MISHKE, VOLKOVINSKY and KABANOVA (1970)
presented the distribution of the daily rate of primary production in the world oceans
obtained by direct 14C measurements and partially supplemented by the indirect estimate
from the data of phytoplankton biomass (see map on the inside of the back cover). The
distribution of daily primary production seems to agree generally with that of chlorophyll
a in the euphotic zone. High values of daily production have usually been observed in
areas of upwelling, which at least in part are closely associated with monsoons, and consequently with high nutrient concentrations. However, except for a few areas where fairly
intensive studies have been made, the seasonal variation of production has not been
studied fully enough for an estimate of the level of annual primary production in different
areas of the Indian Ocean.
For a comparison of patterns of production with other oceans of the world, see the
map inside the back cover. (Note that this map already provides more detail on geographic patterns than the front map in Vol. 1 of Ecological Studies.) The absolute rates
of production given in both maps will require further adjustment in the future. The two
chapters just completed, the localized reports which follow them, chapters 6.1 and 6.2,
and the recent references cited are constructive steps toward a better view of world
oceanic productivity.
Y. ARUGA: Primary Production in the Indian Ocean II
daily rate of primary production in the whole Indian Ocean together with the distribution
in summer and winter. PRASAD, BANERJI and NAIR (1970) described the production in
the Indian Ocean with a figure showing the distribution of the daily rate of primary
production in the Ocean. KOBLENTZ-MISHKE, VOLKOVINSKY and KABANOVA (1970)
presented the distribution of the daily rate of primary production in the world oceans
obtained by direct 14C measurements and partially supplemented by the indirect estimate
from the data of phytoplankton biomass (see map on the inside of the back cover). The
distribution of daily primary production seems to agree generally with that of chlorophyll
a in the euphotic zone. High values of daily production have usually been observed in
areas of upwelling, which at least in part are closely associated with monsoons, and consequently with high nutrient concentrations. However, except for a few areas where fairly
intensive studies have been made, the seasonal variation of production has not been
studied fully enough for an estimate of the level of annual primary production in different
areas of the Indian Ocean.
For a comparison of patterns of production with other oceans of the world, see the
map inside the back cover. (Note that this map already provides more detail on geographic patterns than the front map in Vol. 1 of Ecological Studies.) The absolute rates
of production given in both maps will require further adjustment in the future. The two
chapters just completed, the localized reports which follow them, chapters 6.1 and 6.2,
and the recent references cited are constructive steps toward a better view of world
oceanic productivity.