Wyniki wyszukiwania - BazTech

1

Environmental study of the seasonal succession of mesozooplankton in a brackish water Odra River estuary during 2003–2005

Chojnacki J.C., Tyluś K.

Journal of Ecological Engineering

|

2013

|

Vol. 14, nr 2

12--25

EN

The entire estuary water is dominated by the discharge of the River Odra into the Szczecin Lagoon. The water body is brackish and the salinity in the central part ranges 0.5 and 2 PSU. The Lagoon has a long eutrophication history; usually, two phytoplankton biomass peaks are observed: Diatoms in spring and blue-green algae in summer. The recent data on zooplankton is limited. Rotifers and Cladocerans supply the bulk of the zooplankton biomass. The ichtiofauna is composed of fresh and brackish water, migratory and marine species. Zooplankton and water samples were collected during 2003–2005. The results suggest that during 10 season’s climate in Odra River estuary, Cladocera were the dominant group, large impact on the density of mesozooplankton were: Daphnia cucullata and Daphnia longispina, Copepoda played a lesser role in the Odra River estuary than Cladocera. Biomass of mesozooplankton from the Lagoon was significantly higher compared with the biomass of mesozooplankton from Odra River estuary, which could be related to a greater inflow of nutrients into the Lagoon and the increased growth of phytoplankton, which forms an excellent first stage food web for herbivorous and carnivorous zooplankton, and fish and consequently cormorants.

2

Chemism of the Szczecin Lagoon and taxonomic structure of cladocera subdivision in 2004

Tyluś K., Chojnacki J.C., Bartoszewska A.

Chemia i Inżynieria Ekologiczna

|

2006

|

Vol. 13, nr 8

819-823

EN

The total area of the Szczecin Lagoon waters along with the straits (with Dąbie Lake and Odra waters) amounts to 910 km2, and its capacity to 3.16 km3. In order to conduct qualitative-quantitative tests of zooplankton against the background of hydrochemical conditions, five permanent water sampling stations were estabilished. The samples for physico-chemical analyses and biological material of the Szczecin Lagoon waters were collected in the spring, summer, autumn and winter of 2004 from five research stations. Hydrochemical analyses comprised: nitrogen and phosphorus forms, dissolved oxygen, percentage of oxygen water saturation, chloride ions, water pH and water temperature, and biological tests comprised qualitative and quantitative analysis of zooplankton.

PL

Całkowita powierzchnia wód Zalewu Szczecińskiego wraz z cieśninami (z jez. Dąbie i wód Odry) wynosi 910 km2, a objętość 3,16 km3. W celu przeprowadzenia badań jakościowo-ilościowych zooplank-tonu na tle warunków hydrochemicznych ustalono pięć stałych stacji pobierania próbek. Próbki do analiz fizyczno-chemicznych i materiał biologiczny wód Zalewu Szczecińskiego pobierano w sezonach: wiosna, lato, jesień i zima 2004 r. z pięciu stanowisk badawczych. Badania hydrochemiczne obejmowały między innymi: formy azotu i fosforu, tlen rozpuszczony, procentowe nasycenie wody tlenem, jony chlorkowe, pH i temperaturę wody a badania biologiczne analizę jakościową i ilościową zooplanktonu.

3

Nitrogen and phosphorus form s in Szczecin Lago on in 2003

Chojnacki J.C., Tyluś K.

Chemia i Inżynieria Ekologiczna

|

2005

|

Vol. 12, nr 8

785-789

EN

The Szczecin Lagoon water was sampled with a Ruttner water bottle from the near-surface and near-bottom layers in spring, summer and autumn 2003 from the following 5 sites: Iński Nurt, Roztoka Odrzańska, Mielizna Wolińska, shipping route to Karsibór, and in the vicinity of a buoy marking the exit/entrance to the Trzebież harbour. Laboratory analyses involved assays of all forms of mineral nitrogen, phosphates, and total phosphorus. Results of chemical analyses showed a natural seasonal variability in the parameters assayed, the variability being related to biological activity. Throughout the period of study, mean contents of ammonia nitrogen and phosphates were higher in the near-bottom than in the near-surface layer. Contents of total nitrogen, of the remaining mineral forms of nitrogen as well as those of total phosphorus changed seasonally, in synchrony with their uptake during months of enhanced algal development.

PL

Zalew Szczeciński stanowi część estuarium Odry. Jego powierzchnia wynosi 687 km2, średnia głębokość 3,8 m a objętość wód wynoszących 2,58 km3. Próby z Zalewu Szczecińskiego pobierane były czerpaczem Ruttnera z warstwy przypowierzchniowej i przydennej w sezonach wiosna, lato i jesień 2003 z 5 stanowisk badawczych, następnie w laboratorium wykonano oznaczenia hydrochemiczne wszystkich form azotu mineralnego, fosforanów, fosforu całkowitego, tlen rozpuszczony, procentowe nasycenie wody tlenem. Wyniki analiz chemicznych wykazały naturalna zmienność sezonową wartości oznaczonych wskaźników związanych z działalnością życiową organizmów.