Soil research focuses mainly on soils on land, but the process of soil formation also takes place in shallow waters. Subaqueous soils form below the water surface, mainly on the bottom of shallow, ...stagnant waters such as bogs, swamps, lakes, and shoals in the sea. Three subaquatic soil profiles were investigated in the Strunjan Bay to study them in detail. The sites for the soil investigation were selected after observing the movement of seawater and thus its possible influence on subaquatic soils. All the soils studied are permanently and year-round under water. Therefore, all soil samples were collected under water using drainage pipes and by excavation. The samples were slowly drained in the pipes to prevent mixing of the material and to keep the horizons as intact as possible. Visual observations and standard analyses were carried out in the laboratory according to the identified horizons. During the investigation, we found that apart from water properties and movement, most soil-forming factors can be considered constant, so we investigated and presented a soil hydrosequence. According to the WRB classification, the subaqueous soils in the waters of the Strunjan Bay were divided into the reference groups Gleysols and Leptosols.
The results of a study on morphological features and reproductive phenology of the brown alga
Cystoseira foeniculacea f. tenuiramosa
(Ercegović) A. Gómez Garreta, M.C. Barceló, M.A. Ribera & J. Rull ...Lluch from the marine lagoon of Strunjan (Gulf of Trieste), are reported. Based on monthly samplings carried out during one year period, it was observed that this species shows considerable seasonal morphological variations. The Strunjan marine lagoon appears to be the only location of the Slovenian coast where population of this taxon occur. Based on the high associated biodiversity, we propose the inclusion of this population in the conservation management plans in the area.
Prikazani su rezultati istraživanja morfoloških značajki i reproduktivne fenologije smeđe alge
Cystoseira foeniculacea f. tenuiramosa
(Ercegović) A. Gómez Garreta, M.C. Barceló, M.A. Ribera & J. Rull Lluch u morskoj laguni Strunjan (Tršćanski zaljev). Na temelju mjesečnih uzorkovanja, provedenih tijekom jedne godine, utvrđeno je kako ova vrsta pokazuje značajne sezonske morfološke varijacije. Strunjanska morska laguna vjerojatno je jedina lokacija na slovenskoj obali gdje obitava populacija ove svojte. Na temelju velike povezane bioraznolikosti, predlažemo uključivanje ove populacije u planove upravljanja očuvanja na tom području.
The occurrence of unattached spherical (aegagropilous) populations of the green alga Cladophora prolifera in the marine lagoon of Strunjan (Gulf of Trieste) is reported. Species identification was ...based on molecular and morphological data, and the distribution, ecology and morphological features of the aegagropilous populations are described. The ball-shaped form of this species differs from the typical upright attached form found on open shores by the radial arrangement of the branches and the absence of cells and rhizoids with clear annular constrictions. The formation of the aegagropilous form of C. prolifera likely results from specific hydrodynamic conditions in the human-mediated environment of the marine lagoon, in combination with morphological development of the species. The Strunjan marine lagoon appears to be the only location in the Mediterranean Sea, or even worldwide, where aegagropilous forms of C. prolifera occur in large abundance. Based on the high associated biodiversity, we propose the inclusion of these populations to be considered in conservation management plans in the area.
The occurrence of an aegagropilous form of the red alga Rytiphlaea tinctoria in the Stjuža marine lagoon of Strunjan (Gulf of Trieste) has been reported for the first time. The distribution, mean ...diameter, mean density and morphological structure of this population of R. tinctoria are here described. During the study, it was observed that the ball-like form of this species differs from the attached form found on open shores, lacking a holdfast, having a radial arrangement of the branches, and a curled distal part of the branches. No reproductive structures were observed in any of the collected samples. The ball-like form of Rytiphlaea tinctoria can be considered as an ecotype.
PDF
