“new” and exports in the total primary synthesis of the material in the pelagial of the
Black Sea. Dependencies between the average monthly amount of the F P and a
production indicators (integrated phosphate, chlorophyll “a”, the biomass of phytoplankton photosynthesis) are similar to the laws obtained for oceanic waters with
different trophic status. The nature of the dependences obtained corresponds to the
general laws of formation of the “new” and regenerative products in general, in the
oceans, and the Black Sea in particular.
According to long-term studies of primary production and particulate organic
phosphorus in the photosynthesis zone received the annual variation of the sedimentation of its flow from the photosynthesis zone and calculated annual average
P POM in the deepwater area of the Black Sea. Comparison of average values of the
upward flux of phosphorus and sediment flux it produced at deep water area of the
Black Sea showed that they were respectively 48 and 46 mg-atP∙m
À2
∙year
À1 , and
their ratio corresponds to almost one. This ratio indicates the average balance of
processes, income of phosphorus and sediment removal from the photosynthetic
zone deepwater area of the Black Sea.
According to our estimates in the photic layer of the deepwater area sea a key role
in the biosynthesis of primary production play upward and regeneration of phosphorus
fluxes, they accounted for – 97.3% of the total of its income. The flux of phosphorus
from external sources (river runoff, industrial and domestic effluents, precipitation
and flux from the north-western part of the sea) was 2.7%. Potentially phosphorus flux
from external sources can provide phytoplankton production increase of not more
than 3.3%, relative to the average annual primary production. These results indicate
the absence of anthropogenic eutrophication in the deepwater area of the Black Sea,
even in the period of greatest anthropogenic load from 1980 to 1996.
The above mentioned results findings highlight just some of the issues of the vast
problem of phosphorus cycling in marine ecosystems. However, even the decision
of these questions brings us closer to an understanding of security mechanisms in
nutrients of plankton community and its functioning in the marine ecosystem.
References
Benitez-Nelson CR (2000) The biogeochemical cycling of phosphorus in marine systems. Earth
Sci Rev 51:109–135
Bеrlinsky NA, Garkavaya GP, Bogatova JI (2003) Anthropogenic eutrophication problems and
hypoxia development in the Northwestern part of the Black sea. Ekologiya Moria 63:17–22
Black Sea Database, Supplied with Ocean Base 3.07 DBMS/NATO SfP-971818 ODBMS Black
Sea Project, July 15, 2003, СD for Windows NT, 98, 2000, Me, XP
Boguslavskii SG, Zhorov VA, Ivashchenko IK (1993) Formation of vertical profile of salinity of
the Black Sea. Morsk gidrofiz zhurn 6:46–52
Burlakova ZP, Yeremeyeva LV, Konovalov SK (1998) Seasonal and spatial variability of the
particulate organic matter content in active layer of the Black Sea. Morskoy Gidrofiz Zhurn
5:30–62
Burlakova ZP, Yeremeyeva LV, Konovalov SK (2003) Budget and fluxes of particulate organic
carbon and nitrogen according to data on their vertical distribution in the deep section of the
Black Sea. Ibid 3:34–49
19 Phosphorus Fluxes in the Pelagic Zone of the Black Sea
353
Black Sea. Dependencies between the average monthly amount of the F P and a
production indicators (integrated phosphate, chlorophyll “a”, the biomass of phytoplankton photosynthesis) are similar to the laws obtained for oceanic waters with
different trophic status. The nature of the dependences obtained corresponds to the
general laws of formation of the “new” and regenerative products in general, in the
oceans, and the Black Sea in particular.
According to long-term studies of primary production and particulate organic
phosphorus in the photosynthesis zone received the annual variation of the sedimentation of its flow from the photosynthesis zone and calculated annual average
P POM in the deepwater area of the Black Sea. Comparison of average values of the
upward flux of phosphorus and sediment flux it produced at deep water area of the
Black Sea showed that they were respectively 48 and 46 mg-atP∙m
À2
∙year
À1 , and
their ratio corresponds to almost one. This ratio indicates the average balance of
processes, income of phosphorus and sediment removal from the photosynthetic
zone deepwater area of the Black Sea.
According to our estimates in the photic layer of the deepwater area sea a key role
in the biosynthesis of primary production play upward and regeneration of phosphorus
fluxes, they accounted for – 97.3% of the total of its income. The flux of phosphorus
from external sources (river runoff, industrial and domestic effluents, precipitation
and flux from the north-western part of the sea) was 2.7%. Potentially phosphorus flux
from external sources can provide phytoplankton production increase of not more
than 3.3%, relative to the average annual primary production. These results indicate
the absence of anthropogenic eutrophication in the deepwater area of the Black Sea,
even in the period of greatest anthropogenic load from 1980 to 1996.
The above mentioned results findings highlight just some of the issues of the vast
problem of phosphorus cycling in marine ecosystems. However, even the decision
of these questions brings us closer to an understanding of security mechanisms in
nutrients of plankton community and its functioning in the marine ecosystem.
References
Benitez-Nelson CR (2000) The biogeochemical cycling of phosphorus in marine systems. Earth
Sci Rev 51:109–135
Bеrlinsky NA, Garkavaya GP, Bogatova JI (2003) Anthropogenic eutrophication problems and
hypoxia development in the Northwestern part of the Black sea. Ekologiya Moria 63:17–22
Black Sea Database, Supplied with Ocean Base 3.07 DBMS/NATO SfP-971818 ODBMS Black
Sea Project, July 15, 2003, СD for Windows NT, 98, 2000, Me, XP
Boguslavskii SG, Zhorov VA, Ivashchenko IK (1993) Formation of vertical profile of salinity of
the Black Sea. Morsk gidrofiz zhurn 6:46–52
Burlakova ZP, Yeremeyeva LV, Konovalov SK (1998) Seasonal and spatial variability of the
particulate organic matter content in active layer of the Black Sea. Morskoy Gidrofiz Zhurn
5:30–62
Burlakova ZP, Yeremeyeva LV, Konovalov SK (2003) Budget and fluxes of particulate organic
carbon and nitrogen according to data on their vertical distribution in the deep section of the
Black Sea. Ibid 3:34–49
19 Phosphorus Fluxes in the Pelagic Zone of the Black Sea
353