Tracer methods used to verify the hypothesis of Cvijić about the underground connection between Prespa and Ohrid Lake

Amataj, Sokrat; Anovski, T.; Benischke, Ralf; Eftimi, Romeo; Gourcy, Laurence; Kola, Liliana; Leontiadis, I.L.; Micevski, Eftim; Stamos, A.; Zoto, Jovan

doi:10.1007/s00254-006-0388-9

Cited by 44 publications

(19 citation statements)

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“…An artificial tracer test would demonstrate in these conditions short transit times and relatively sharp tracer pulses. The study carried out on 2002 by using Sulphorhodamine G Extra has confirmed this [5]. On the other hand the predominant stability of water discharges through Saint Naum -Tushemishti springs suggests the communication between Prespa and Ohrid should be better described by longer transit times, due to the very high degree karstification of the Dry Mountain and Galichitsa, with numerous elements that could trap or delay groundwater movement through them.…”

Section: Use Of Natural Isotopessupporting

confidence: 50%

Study of the Prespa-Ohrid lake system using tracer experiments and the lake’s water balance

Popov

Anovska²,

Arsov³

et al. 2009

WIT Transactions on Ecology and the Environment

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The Prespa-Ohrid lake system is shared between Greece, Republic of Macedonia (FYRO) and Albania. In recent years a water decrease in the Prespa Lake has been recorded. Though it has been established that the water from the Prespa Lake flows into the Ohrid Lake through the Galichica mountain, it is not clear whether this is the main reason for the lake's water loss in recent years. The three main reasons behind the lake's water loss investigated are: (i) underground flow from Prespa to Ohrid Lake, change in weather pattern, anthropogenic factors. Though there were several studies investigating the water level decrease in the lake, so far no conclusion on the reasons behind this phenomenon has been reached. As part of an ongoing research project supported by the NATO Science for Peace (SfP) programme the problem of water loss in the lake has been investigated. Some of the results of this study are presented.

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Section: Use Of Natural Isotopessupporting

confidence: 50%

Study of the Prespa-Ohrid lake system using tracer experiments and the lake’s water balance

Popov

Anovska²,

Arsov³

et al. 2009

WIT Transactions on Ecology and the Environment

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“…There is a relatively small catchment area of 2600 km 2 , even accounting for input from neighbouring Lake Prespa, which delivers water through a network of karst aquifers thought to correspond to 53 % of total water input (Matzinger et al, 2006a). The subterranean connection has been confirmed using tracer experiments (Anovski et al, 1991;Amataj et al, 2007) and feeds spring complexes mainly to the south-east of the lake (Eftimi and Zoto, 1997;Matzinger et al, 2006a). The remaining input comprises river inflow (24 %) and direct precipitation on the lake's surface (23 %).…”

Section: General Settingmentioning

confidence: 71%

Northern Mediterranean climate since the Middle Pleistocene: a 637 ka stable isotope record from Lake Ohrid (Albania/Macedonia)

et al. 2016

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Abstract. Lake Ohrid (Macedonia/Albania) is an ancient lake with unique biodiversity and a site of global significance for investigating the influence of climate, geological, and tectonic events on the generation of endemic populations. Here, we present oxygen (δ 18 O) and carbon (δ 13 C) isotope data from carbonate over the upper 243 m of a composite core profile recovered as part of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOP-SCO) project. The investigated sediment succession covers the past ca. 637 ka. Previous studies on short cores from the lake (up to 15 m, < 140 ka) have indicated the total inorganic carbon (TIC) content of sediments to be highly sensitive to climate change over the last glacial-interglacial cycle. Sediments corresponding to warmer periods contain abundant endogenic calcite; however, an overall low TIC content in glacial sediments is punctuated by discrete bands of early diagenetic authigenic siderite. Isotope measurements on endogenic calcite (δ 18 O c and δ 13 C c ) reveal variations both between and within interglacials that suggest the lake has been subject to palaeoenvironmental change on orbital and millennial timescales. We also measured isotope ratios from authigenic siderite (δ 18 O s and δ 13 C s ) and, with the oxygen isotope composition of calcite and siderite, reconstruct δ 18 O of lake water (δ 18 O lw ) over the last 637 ka. Interglacials have higher δ 18 O lw values when compared to glacial periods most likely due to changes in evaporation, summer temperature, the proportion of winter precipitation (snowfall), and inflow from adjacent Lake Prespa. The isotope stratigraphy suggests Lake Ohrid experienced a period of general stability from marine isotope stage (MIS) 15 to MIS 13, highlighting MIS 14 as a particularly warm glacial. Climate conditions became progressively wetter during MIS 11 and MIS 9. Interglacial periods after MIS 9 are characterised by increasingly evaporated and drier conditions through MIS 7, MIS 5, and the Holocene. Our results provide new evidence for long-term climate change in the northern Mediterranean region, which will form the basis to better understand the influence of major environmental events on biological evolution within Lake Ohrid.

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“…Matter et al, 2010). The karst aquifers are charged by precipitation and by springs emanating from (the topographically higher) Lake Prespa (Stankovic, 1960;Anovski et al, 1980;Matzinger et al, 2006a;Amataj et al, 2007). The outflow of Lake Ohrid is the river Crni Drim in the northern part of the lake, which accounts for 63% of the water loss, with the remaining 37% accounted for by evaporation (Watzin et al, 2002).…”

Section: General Settingmentioning

confidence: 99%

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes

et al. 2010

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Abstract.Here we present stable isotope data from three sediment records from lakes that lie along the MacedonianAlbanian border (Lake Prespa: 1 core, and Lake Ohrid: 2 cores). The records only overlap for the last 40 kyr, although the longest record contains the MIS 5/6 transition (Lake Ohrid). The sedimentary characteristics of both lakes differ significantly between the glacial and interglacial phases. At the end of MIS 6 Lake Ohrid's water level was low (high δ 18 O calcite ) and, although productivity was increasing (high calcite content), the carbon supply was mainly from inorganic catchment rock sources (high δ 13 C carb ). During the last interglacial, calcite and TOC production and preservation increased, progressively lower δ 18 O calcite suggest increase in humidity and lake levels until around 115 ka. During ca. 80 ka to 11 ka the lake records suggest cold conditions as indicated by negligible calcite precipitation and low organic matter content. In Lake Ohrid, δ 13 C org are complacent; in contrast, Lake Prespa shows consistently higher δ 13 C org suggesting a low oxidation of 13 C-depleted organic matter in agreement with a general deterioration of climate conditions during the glacial. From 15 ka to the onset of the Holocene, calcite and TOC begin to increase, suggesting lake levels were probably low (high δ 18 O calcite ). In the Holocene (11 ka to present) enhanced productivity is manifested by high calcite and organic matter content. All three cores show an early Holocene characterised by low δ 18 O calcite , apart from the very early Holocene phase in Prespa where the lowest Correspondence to: M. J. Leng (mjl@bgs.ac.uk) δ 18 O calcite occurs at ca. 7.5 ka, suggesting a phase of higher lake level only in (the more sensitive) Lake Prespa. From 6 ka, δ 18 O calcite suggest progressive aridification, in agreement with many other records in the Mediterranean, although the uppermost sediments in one core records low δ 18 O calcite which we interpret as a result of human activity. Overall, the isotope data present here confirm that these two big lakes have captured the large scale, low frequency palaeoclimate variation that is seen in Mediterranean lakes, although in detail there is much palaeoclimate information that could be gained, especially small scale, high frequency differences between this region and the Mediterranean.

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Tracer methods used to verify the hypothesis of Cvijić about the underground connection between Prespa and Ohrid Lake

Cited by 44 publications

References 1 publication

Study of the Prespa-Ohrid lake system using tracer experiments and the lake’s water balance

Study of the Prespa-Ohrid lake system using tracer experiments and the lake’s water balance

Northern Mediterranean climate since the Middle Pleistocene: a 637 ka stable isotope record from Lake Ohrid (Albania/Macedonia)

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes

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