In the cold season of the year (spring and autumn), Urospora and Ulothrix
species were found both in the north and the south of the coast. This is the
characteristic vegetation, that, together with red and brown stenothermic algae
Porphyra leuctosticta (syn.Pyropia leucosticta), Ectocarpus siliculosus,
Scytosiphon lomentaria is present until the water temperature increases, and
becames favourable to the abundant development of green eurithermic and opportunistic species.
A comparison can be made between the northern and southern zone of our coast,
that shows that in present environmental conditions, a more diverse macroalgal
flora develops in the southern sector of the Romanian shore, compared with the
northern part. This is due to the presence of a bigger surface of hard substratum and
less polluted waters in the south of our coast (mainly 2 Mai-Vama-Veche area).
21.5 Conclusions
Knowing the fact that macroalgae are important elements in the marine ecosystem
and play an important part in the development of marine life, continuous studies are
absolutely necessary in order to monitor the development and evolution of
macrophytobenthos diversity.
These observations confirmed: a qualitative decline after year 2000 regarding all
taxonomic groups, having as consequence the uniformity of algal belts, the almost
disappearance of perennial species (this fact having as consequence the disappearance of associated or epiphytic species and a non-stable equilibrium of macrophytic
communities), much lower productions (compared with those of Cystoseira in
previous years). A very important part of the study should be the continuous
observation of the evolution of the physical-chemical parameters of shallow waters,
that can give valuable information about the environment quality but also about the
expected amelioration of the state of the marine ecosystem. In several reports on the
quality of Romanian coastal waters, it can be noted an improvement, specially in
what concerns the decrease of nutrients, and the reduced number of algal blooms,
but even now the concentrations are higher than the ones measured before
1960–1970 (years that mark the start of the eutrophication process at our littoral).
The most important change over the decades, suffered by the algal flora in
general, and red macrophytes in special, along the Romanian shore, is the qualitative decline, compensated by a quantitative richness of a small number of species
from the Ulva and Cladophora genera.
Some considerations on the future measures may include: a continuous observation of the evolution of the physical-chemical parameters of shallow waters; a
continuous biodiversity biomonitoring in order to enable observations of all the
changes that might occur; submission of projects with all interested partners, that
have to motion rapid, integrated and realistic rehabilitation programs.
378
D. Sava
species were found both in the north and the south of the coast. This is the
characteristic vegetation, that, together with red and brown stenothermic algae
Porphyra leuctosticta (syn.Pyropia leucosticta), Ectocarpus siliculosus,
Scytosiphon lomentaria is present until the water temperature increases, and
becames favourable to the abundant development of green eurithermic and opportunistic species.
A comparison can be made between the northern and southern zone of our coast,
that shows that in present environmental conditions, a more diverse macroalgal
flora develops in the southern sector of the Romanian shore, compared with the
northern part. This is due to the presence of a bigger surface of hard substratum and
less polluted waters in the south of our coast (mainly 2 Mai-Vama-Veche area).
21.5 Conclusions
Knowing the fact that macroalgae are important elements in the marine ecosystem
and play an important part in the development of marine life, continuous studies are
absolutely necessary in order to monitor the development and evolution of
macrophytobenthos diversity.
These observations confirmed: a qualitative decline after year 2000 regarding all
taxonomic groups, having as consequence the uniformity of algal belts, the almost
disappearance of perennial species (this fact having as consequence the disappearance of associated or epiphytic species and a non-stable equilibrium of macrophytic
communities), much lower productions (compared with those of Cystoseira in
previous years). A very important part of the study should be the continuous
observation of the evolution of the physical-chemical parameters of shallow waters,
that can give valuable information about the environment quality but also about the
expected amelioration of the state of the marine ecosystem. In several reports on the
quality of Romanian coastal waters, it can be noted an improvement, specially in
what concerns the decrease of nutrients, and the reduced number of algal blooms,
but even now the concentrations are higher than the ones measured before
1960–1970 (years that mark the start of the eutrophication process at our littoral).
The most important change over the decades, suffered by the algal flora in
general, and red macrophytes in special, along the Romanian shore, is the qualitative decline, compensated by a quantitative richness of a small number of species
from the Ulva and Cladophora genera.
Some considerations on the future measures may include: a continuous observation of the evolution of the physical-chemical parameters of shallow waters; a
continuous biodiversity biomonitoring in order to enable observations of all the
changes that might occur; submission of projects with all interested partners, that
have to motion rapid, integrated and realistic rehabilitation programs.
378
D. Sava