Research on macroalgae was also an important preoccupation of A.S. Bologa,
who was preoccupied about the state of macroalgal vegetation (Celan and Bologa
1981, 1983; Bologa 1987–1988), and also about the decline of the macroalgal
vegetation and marine biodiversity in general (Bologa 2001; Bologa and Sava
2006; Sava and Bologa 2008, 2010).
A.S Bologa extended also his research to the physiology and chemistry of
macroalgae e.g., he studied the photosynthetic productivity of benthic algae
(Bologa 1979, 1980), as well as their capacity to accumulate radioactive isotopes,
representing useful bioindicators for this type of pollution (Bologa et al. 1983).
In his papers F. Vasiliu, studied the species of the Enteromorpha genus (Celan
and Vasiliu 1975), and also the taxonomy and ecology of all the groups of
macroalgae from the Romanian littoral.
Several decades ago these studies showed a much higher number of species,
subspecies and varieties as presently found in the coastal waters. The continuous
quantitative and qualitative lowering of algal diversity and biomass becomes
evident when analyzing the related literature.
According to A.D. Zinova, in 1967, the Black Sea macroalgoflora totalized a
number of 277 species with 74 Chlorophyta, 3 Xanthophyta, 71 Phaeophyta and
129 Rhodophyta (Zinova 1967). But further research carried out after 1970 showed
a gradual impoverishment, especially from the qualitative point of view, of the
macrophytobenthos.
The observations on the both qualitatively and quantitatively decline of the
macroalgal flora, initiated by Celan, were confirmed. In 1969, only 77 species
were identified (Skolka 1969), later, in 1977, 86 species (Bavaru 1977) and
69 and 55 respectively, after 1980 (Vasiliu 1984, 1996).
It is considered that these changes are due to a number of causes such as: the
increase of eutrophication, massive frosts, the silting of the rocky bottom with
suspended matter, decrease of light penetration in the water column due to the same
suspensions, (Bologa 1987/88).
In more recent years, unfortunately few research has been carried out
regarding the present state of the macroalgal flora (Bologa 2001; Sava 2006;
Sava et al. 2007a, b).
Taking this into consideration, a new approach of such studies is absolutely
necessary in order to establish the major modifications that occurred in the state of
macrophytobenthos, under the influence of harmful factors that disturbed the
quality of the marine environment and biodiversity.
A number of scientific papers were published, showing the actual state and
proposing measures and ways of conservation of the coastal marine environment.
(Sava et al. 2003, 2011; Sava and Bologa 2010; Bologa and Sava 2012; Marin et al.
2015), or showing the interest in the biochemical content of macroalgae (Balaban
et al. 2013; Trifan et al. 2015a) or their pharmaceutical importance; (Trifan et al.
2015b; Trifan et al. 2016).
372
D. Sava
who was preoccupied about the state of macroalgal vegetation (Celan and Bologa
1981, 1983; Bologa 1987–1988), and also about the decline of the macroalgal
vegetation and marine biodiversity in general (Bologa 2001; Bologa and Sava
2006; Sava and Bologa 2008, 2010).
A.S Bologa extended also his research to the physiology and chemistry of
macroalgae e.g., he studied the photosynthetic productivity of benthic algae
(Bologa 1979, 1980), as well as their capacity to accumulate radioactive isotopes,
representing useful bioindicators for this type of pollution (Bologa et al. 1983).
In his papers F. Vasiliu, studied the species of the Enteromorpha genus (Celan
and Vasiliu 1975), and also the taxonomy and ecology of all the groups of
macroalgae from the Romanian littoral.
Several decades ago these studies showed a much higher number of species,
subspecies and varieties as presently found in the coastal waters. The continuous
quantitative and qualitative lowering of algal diversity and biomass becomes
evident when analyzing the related literature.
According to A.D. Zinova, in 1967, the Black Sea macroalgoflora totalized a
number of 277 species with 74 Chlorophyta, 3 Xanthophyta, 71 Phaeophyta and
129 Rhodophyta (Zinova 1967). But further research carried out after 1970 showed
a gradual impoverishment, especially from the qualitative point of view, of the
macrophytobenthos.
The observations on the both qualitatively and quantitatively decline of the
macroalgal flora, initiated by Celan, were confirmed. In 1969, only 77 species
were identified (Skolka 1969), later, in 1977, 86 species (Bavaru 1977) and
69 and 55 respectively, after 1980 (Vasiliu 1984, 1996).
It is considered that these changes are due to a number of causes such as: the
increase of eutrophication, massive frosts, the silting of the rocky bottom with
suspended matter, decrease of light penetration in the water column due to the same
suspensions, (Bologa 1987/88).
In more recent years, unfortunately few research has been carried out
regarding the present state of the macroalgal flora (Bologa 2001; Sava 2006;
Sava et al. 2007a, b).
Taking this into consideration, a new approach of such studies is absolutely
necessary in order to establish the major modifications that occurred in the state of
macrophytobenthos, under the influence of harmful factors that disturbed the
quality of the marine environment and biodiversity.
A number of scientific papers were published, showing the actual state and
proposing measures and ways of conservation of the coastal marine environment.
(Sava et al. 2003, 2011; Sava and Bologa 2010; Bologa and Sava 2012; Marin et al.
2015), or showing the interest in the biochemical content of macroalgae (Balaban
et al. 2013; Trifan et al. 2015a) or their pharmaceutical importance; (Trifan et al.
2015b; Trifan et al. 2016).
372
D. Sava