Chapter 19
Phosphorus Fluxes in the Pelagic Zone
of the Black Sea
Aleksandr V. Parkhomenko
Abstract On the basis of these long-term observations of hydrophysical,
hydrochemical and biological structure of water the seasonal variability of the
upward, regeneration, sedimentation and fluxes of phosphorus from external
sources in the photosynthetic zone in the deepwater area of the Black Sea was
established. The estimates of the contribution of upward and regeneration fluxes of
phosphorus in its total flux into the photosynthetic zone and sedimentation removal
in some months urea are obtained. The relationship between the monthly averages
of the rising contribution of phosphorus flux and its concentration chlorophyll “a”
and biomass of phytoplankton in photosynthesis zone was established. Potentially
possible values of the “new”, regeneration and total phytoplankton production in
the deepwater area of the Black Sea are calculated. The correspondence between
the annual estimates of primary production, calculated on the flux of phosphorus
and averaged data of direct measurements of phytoplankton production in the
deepwater area of the Black Sea is shown. It was found that the average annual
value of the upward flux of phosphorus in the photosynthesis zone is equivalent to
the average value of its sediment flux, indicating that the balance of the phosphorus
cycle and absence of human influence on the level of primary production in the
deepwater area of the Black Sea. The results are discussed in terms of the general
laws of formation of the “new” and the regeneration of the primary production.
Keywords The Black Sea • Phosphorus • Upward • Regeneration and
sedimentation fluxes • Phytoplankton • Primary production
19.1 Introduction
The Black Sea – unique in its physicochemical and biological properties of the
pool, in an ecosystem that in recent decades there were significant changes in the
chemical and biological structure of the water in the deep sea and coastal areas. The
A.V. Parkhomenko (*)
Institute of Marine Biological Research A.O. Kovalevsky Russian Academy of Sciences,
Sevastopol 299011, Russia
e-mail: parkhomenko.al@yandex.ua
© Springer International Publishing AG 2018
C.W. Finkl, C. Makowski (eds.), Diversity in Coastal Marine Sciences, Coastal
Research Library 23, DOI 10.1007/978-3-319-57577-3_19
337
Phosphorus Fluxes in the Pelagic Zone
of the Black Sea
Aleksandr V. Parkhomenko
Abstract On the basis of these long-term observations of hydrophysical,
hydrochemical and biological structure of water the seasonal variability of the
upward, regeneration, sedimentation and fluxes of phosphorus from external
sources in the photosynthetic zone in the deepwater area of the Black Sea was
established. The estimates of the contribution of upward and regeneration fluxes of
phosphorus in its total flux into the photosynthetic zone and sedimentation removal
in some months urea are obtained. The relationship between the monthly averages
of the rising contribution of phosphorus flux and its concentration chlorophyll “a”
and biomass of phytoplankton in photosynthesis zone was established. Potentially
possible values of the “new”, regeneration and total phytoplankton production in
the deepwater area of the Black Sea are calculated. The correspondence between
the annual estimates of primary production, calculated on the flux of phosphorus
and averaged data of direct measurements of phytoplankton production in the
deepwater area of the Black Sea is shown. It was found that the average annual
value of the upward flux of phosphorus in the photosynthesis zone is equivalent to
the average value of its sediment flux, indicating that the balance of the phosphorus
cycle and absence of human influence on the level of primary production in the
deepwater area of the Black Sea. The results are discussed in terms of the general
laws of formation of the “new” and the regeneration of the primary production.
Keywords The Black Sea • Phosphorus • Upward • Regeneration and
sedimentation fluxes • Phytoplankton • Primary production
19.1 Introduction
The Black Sea – unique in its physicochemical and biological properties of the
pool, in an ecosystem that in recent decades there were significant changes in the
chemical and biological structure of the water in the deep sea and coastal areas. The
A.V. Parkhomenko (*)
Institute of Marine Biological Research A.O. Kovalevsky Russian Academy of Sciences,
Sevastopol 299011, Russia
e-mail: parkhomenko.al@yandex.ua
© Springer International Publishing AG 2018
C.W. Finkl, C. Makowski (eds.), Diversity in Coastal Marine Sciences, Coastal
Research Library 23, DOI 10.1007/978-3-319-57577-3_19
337