Cianobaktēriju attīstību ietekmējošie faktori Rīgas līča austrumu piekrastes ūdeņos
Date
2022
Authors
Kozlova, Vendija
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Bakalaura darbā tika noskaidroti Rīgas līča austrumu piekrastes raksturīgo cianobaktēriju attīstībai būtiskie faktori, analizējot mainīgo fizikāli – ķīmisko faktoru ietekmi uz cianobaktērijas biomasas dinamiku. Pētījuma dati tika iegūti Rīgas līča austrumu piekrastē monitoringa stacijā 162B, veicot apsekojumus no 2021. gada aprīļa līdz novembrim. Apsekojuma laikā tika veikta ķīmisko parametru analīze, cianobaktēriju sugu biomasas noteikšana un fizikālo parametru iegūšana. Dati tika apstrādāti izmantojot korelācijas analīzi. Rezultāti liecina, ka cianobaktērijas sastopamas visā novērojumu periodā, taču to būtiskākais biomasas pieaugums konstatēts virsējos slāņos maijā un septembrī, tādējādi netika noteikta izteikta sezonalitāte mērījumu vietā. Tika konstatēts, ka būtiskākais parametrs cianobaktēriju attīstībai bija viļņu augstums. Atšķirības starp pētījumu un zinātnisko literatūru nosaka Rīgas līča dinamiskā vide, kas ietekmē mainīgos parametrus.
The Bachelors thesis focuses on finding the statistically significant factors promoting the development of cyanobacteria species in East coast of the Gulf of Riga by analyzing the influence of alternating physical and chemical factors on the dynamics of cyanobacterial biomass. The research data were obtained at the 162nd B monitoring station of the Gulf of Riga on the east coast by collecting samples in the period from April to November 2021. During the sampling, the analyses of chemical factors, determination of biomass of cyanobacterial species and physical factors measurements were performed. To process the data correlation analysis was performed. The results showed that the cyanobacteria were found throughout the whole sampling period, however the significant increase in the biomass was observed in the upper layer in May and September, so no significant seasonality was observed at the measurement site. Wave height was found to be statistically significant parameter for the development of cyanobacteria. Difference between scientific literature and research are determined by the dynamic environment of Gulf of Riga, which affects the variable parameters.
The Bachelors thesis focuses on finding the statistically significant factors promoting the development of cyanobacteria species in East coast of the Gulf of Riga by analyzing the influence of alternating physical and chemical factors on the dynamics of cyanobacterial biomass. The research data were obtained at the 162nd B monitoring station of the Gulf of Riga on the east coast by collecting samples in the period from April to November 2021. During the sampling, the analyses of chemical factors, determination of biomass of cyanobacterial species and physical factors measurements were performed. To process the data correlation analysis was performed. The results showed that the cyanobacteria were found throughout the whole sampling period, however the significant increase in the biomass was observed in the upper layer in May and September, so no significant seasonality was observed at the measurement site. Wave height was found to be statistically significant parameter for the development of cyanobacteria. Difference between scientific literature and research are determined by the dynamic environment of Gulf of Riga, which affects the variable parameters.
Description
Keywords
Vides zinātne , Cianobaktērijas , Rīgas līcis , Biogēni , PAR , Korelācijas analīze