Naslov
Tufa formation and detritus processing in Dinaridic karst

Autori
Miliša, Marko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Brožura abstraktov / - Lahti : Slovenská limnologická spoločnosť/Slovak Limnological Society, 2015

Skup
8. Jarni limnologicky seminar 8th spring limnological workshop

Mjesto i datum
Jurský Šúr, Slovačka, 23.04.2015

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Nije recenziran

Ključne riječi
calcite; leaf litter; flow velocity; hyporheic; Croatia

Sažetak
Water that surfaces in karst environments can be supersaturated with carbonates. Under certain circumstances calcium carbonate in the form of calcite is deposited on any immersed surfaces including organisms. Such deposits of calcite, developing under temperate conditions is called tufa. In Dinaridic karst, due to rapid deposition, tufa forms very dynamic environments that exhibit exciting interplay of water flow, calcite, detritus and organisms. Since the deposition occurs very rapidly (more than 1 cm per year) the organisms that dwell here must be highly adapted for coping with the burial process4. Some of these organisms play a crucial role in the process of tufa deposition. Detritus processing is also specific in these habitats. As in similar streams elsewhere the energetic basis for benthic assemblages is allochthonous detritus. While leaf litter decomposition can be hindered by encrustation5, in Dinaridic karst it seems that tufa deposition promotes the decomposition. The interaction between the microbial community and the porous character of this tufa allows microbial decomposition even under the tufa cover2. Also, fast flowing water containing many calcite crystals and other particles is a potent abrasive that contributes to decomposition process. Macroinvertebrates, on the other hand, cannot influence the decomposition rates to any significant level. Moss plays a significant role in trapping the particles from seston especially in fast flow habitats1. In addition to its surface role, moss is important as an energy source in the hyporheic zone, where moss tissue overgrown with tufa represents main source of particulate organic matter. This is especially important during summer when tufa deposition rates are highest3. In this way tufa deposition ensures constant source of energy to the hyporheic zone.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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