Charakterystyka stratyfikacji termicznej i chemicznej wód jeziora Ostrowite (PNBT) w roku 2015 = Features of the thermal and chemical stratification of the Ostrowite Lake water in the year 2015

Gierszewski Piotr, Miler Karol, Kaszubski Michał. Charakterystyka stratyfikacji termicznej i chemicznej wód jeziora Ostrowite (PNBT) w roku 2015 = Features of the thermal and chemical stratification of the Ostrowite Lake water in the year 2015. Journal of Education, Health and Sport. 2015;5(12):217-229. ISSN 2391-8306. DOIhttp://dx.doi.org/10.5281/zenodo.35354 http://ojs.ukw.edu.pl/index.php/johs/article/view/2015%3B5%2812%29%3A217-229 http://pbn.nauka.gov.pl/works/679838 Formerly Journal of Health Sciences. ISSN 1429-9623 / 2300-665X. Archives 2011–2014http://journal.rsw.edu.pl/index.php/JHS/issue/archive   Deklaracja. Specyfika i zawartość merytoryczna czasopisma nie ulega zmianie. Zgodnie z informacją MNiSW z dnia 2 czerwca 2014 r., że w roku 2014 nie będzie przeprowadzana ocena czasopism naukowych; czasopismo o zmienionym tytule otrzymuje tyle samo punktów co na wykazie czasopism naukowych z dnia 31 grudnia 2014 r. The journal has had 5 points in Ministry of Science and Higher Education of Poland parametric evaluation. Part B item 1089. (31.12.2014). © The Author (s) 2015; This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland and Radom University in Radom, Poland Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. The authors declare that there is no conflict of interests regarding the publication of this paper. Received: 10.11.2015. Revised 25.11.2015. Accepted: 14.12.2015.   Charakterystyka stratyfikacji termicznej i chemicznej wód jeziora Ostrowite (PNBT) w roku 2015 Features of the thermal and chemical stratification of the Ostrowite Lake water in the year 2015   Piotr Gierszewski1, Karol Miler1, Michał Kaszubski2   1. Instytut Geografii, Uniwersytet Kazimierza Wielkiego w Bydgoszczy 2. Instytut Geografii i Przestrzennego Zagospodarowania, Polska Akademia Nauk   Abstrakt W artykule przedstawiono problem zróżnicowania stratyfikacji termicznej i chemicznej wód w wieloakwenowym jeziorze Ostrowite położnym na obszarze Parku Narodowego „Bory Tucholskie”. Na podstawie pomiarów temperatury, koncentracji tlenu rozpuszczonego w wodzie i wartości przewodnictwa elektrolitycznego wody w okresie wiosennej cyrkulacji i letniej stagnacji wykazano różny charakter stratyfikacji wód w poszczególnych akwenach jeziora. Określono, że największym indywidualizmem pod tym względem charakteryzowała się wschodnia rynna jeziora. Ze względu na wielkość oraz cechy morfometryczne ta część jeziora wykazywała mniejszą dynamikę wód.   Słowa kluczowe: jezioro dymiktyczne, stratyfikacja wód, zróżnicowanie temperatury wody, koncentracja tlenu, przewodnictwo elektrolityczne, jezioro Ostrowite.   Abstract The paper presents the problem of the diversity of thermal and chemical stratification in the multi-pools Ostrowite Lake, situated on the area of the National Park "Tucholskie Forests". Based on measurements of temperature, dissolved oxygen concentration in water and the electrolytic conductivity of water conducted during spring turnover and summer stagnation of water, the diversity of water stratification in various pools of the lake has been shown. The greatest individuality due to the course of stratification, was occurred in the western channel of the lake. Taking into account the size and morphometric parameters, this part of the lake revealed a lower dynamic of water.   Key words: dimictic lake, water stratification, water temperature diversity, oxygen concentration, electrolytic conductance, Ostrowite Lake

Advances in understanding calcite varve formation: new insights from a dual lake monitoring approach in the southern Baltic lowlands

We revise the conceptual model of calcite varves and present, for the first time, a dual lake monitoring study in two alkaline lakes providing new insights into the seasonal sedimentation processes forming these varves. The study lakes, Tiefer See in NE Germany and Czechowskie in N Poland, have distinct morphology and bathymetry, and therefore, they are ideal to decipher local effects on seasonal deposition. The monitoring setup in both lakes is largely identical and includes instrumental observation of (i) meteorological parameters, (ii) chemical profiling of the lake water column including water sampling, and (iii) sediment trapping at both bi‐weekly and monthly intervals. We then compare our monitoring data with varve micro‐facies in the sediment record. One main finding is that calcite varves form complex laminae triplets rather than simple couplets as commonly thought. Sedimentation of varve sub‐layers in both lakes is largely dependent on the lake mixing dynamics and results from the same seasonality, commencing with diatom blooms in spring turning into a pulse of calcite precipitation in summer and terminating with a re‐suspension layer in autumn and winter, composed of calcite patches, plant fragments and benthic diatoms. Despite the common seasonal cycle, the share of each of these depositional phases in the total annual sediment yield is different between the lakes. In Lake Tiefer See calcite sedimentation has the highest yields, whereas in Lake Czechowskie, the so far underestimated re‐suspension sub‐layer dominates the sediment accumulation. Even in undisturbed varved sediments, re‐suspended material becomes integrated in the sediment fabric and makes up an important share of calcite varves. Thus, while the biogeochemical lake cycle defines the varves’ autochthonous components and micro‐facies, the physical setting plays an important role in determining the varve sub‐layers’ proportion.Leibniz‐Gemeinschaft http://dx.doi.org/10.13039/501100001664Narodowe Centrum Nauki http://dx.doi.org/10.13039/501100004281Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659ICLE