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1.
Time-series analysis of oxygen as an important environmental parameter for monitoring diversity hotspot ecosystems : an example of a river sinking into the karst underground
Saptashwa Bhattacharyya, Janez Mulec, Andreea Oarga-Mulec, 2023, original scientific article

Abstract: Predicting variations in dissolved oxygen concentration (DO) is important for management and environmental monitoring of aquatic ecosystems. Regression analyses and univariate and multivariate time-series analyses based on autoregressive methods were performed to investigate oxygen conditions in the Pivka River, Slovenia. The monitoring site was established upstream where the river sinks into the karst cave Postojnska jama, which hosts one of the richest subterranean faunas yet studied worldwide. It was found that abnormal variations of DO started to be noticeable at values of DO < 3 mg/L and became more pronounced until the ecosystem reached fully anoxic conditions. The abnormal fluctuations during the critical summer period were due to environmental conditions, organic load and resident biota. Predictions for future detection of anomalies in DO values were made from stable residuals of the measured data, and it was demonstrated that the model could be used to obtain a reliable estimate for a short period, such as one day. The example presented an analysis pipeline based on specific and established threshold DO values, and it is particularly important for ecosystems with diversity hotspots where prolonged low DO values can pose a threat to their biota.
Keywords: karst (geology), aquatic ecosystems, dissolved oxygen, modelling, prediction
Published in RUNG: 05.09.2023; Views: 615; Downloads: 5
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The river : monitoring of antropogenic impact
2022

Published in RUNG: 07.10.2022; Views: 823; Downloads: 0
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9.
Establishing a new balance : a fair marriage between global and local value chains
Vesna Lavtižar, Andreea Oarga-Mulec, 2022, independent professional component part or a chapter in a monograph

Keywords: supply chains, marketing chains, natural disasters, covid-19, globalization
Published in RUNG: 12.07.2022; Views: 1241; Downloads: 54
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10.
Komunikacija eholokacija : intermedijski performance, 15.-16. 4. 2022, Monfort, Obala Portorož
Jasna Hribernik, Andreea Oarga-Mulec, 2022, artistic performance

Published in RUNG: 12.07.2022; Views: 1031; Downloads: 0
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