<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Evelpidou, N.</style></author><author><style face="normal" font="default" size="100%">Dimitriou, E.</style></author><author><style face="normal" font="default" size="100%">Papadaki, Ch.</style></author><author><style face="normal" font="default" size="100%">Stamatakis, M.</style></author><author><style face="normal" font="default" size="100%">Ntoanidis, L.</style></author><author><style face="normal" font="default" size="100%">Koutsomichou, I.</style></author><author><style face="normal" font="default" size="100%">Anastasatou, M.</style></author><author><style face="normal" font="default" size="100%">Karkani, A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A correlation of the structure and chemical composition of the habitat sediments with the ecological flow of Acheloos river in Trikala Prefecture, Thessaly, Greece.</style></title><secondary-title><style face="normal" font="default" size="100%">10th International Congress of the Hellenic Geographical Society</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">22-24 October</style></date></pub-dates></dates><pub-location><style face="normal" font="default" size="100%">Thessaloniki, Greece</style></pub-location><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;div&gt;During the implementation of fieldwork for the “Ecoflow” Cooperation project, in Acheloos&amp;nbsp;River, Trikala Prefecture, Central Greece, 10 unstructured sediment samples were extracted&amp;nbsp;from 3 sites along the river banks for measurements and analysis. The samples were taken&amp;nbsp;from the areas of Drosochori (DR 1, DR 2 &amp;amp; DR 3), Aspropotamos (ASP 1 &amp;amp; ASP 3) and&amp;nbsp;Mesochora (KOR 1, KOR 2, MES 1, MES 2, &amp;amp; MES 4).&amp;nbsp;For granulometric analysis of the samples, the Folk &amp;amp;Ward method (2222) was used. As it&amp;nbsp;was resulted, all samples are classified as gravelly sands to sandy gravels, poorly to very&amp;nbsp;poorly sorted, very coarse to very fine skewed and platykurtic to mesokurtic.&amp;nbsp;The ΧRD mineralogical analysis showed that in all the samples quartz is the major&amp;nbsp;component. Calcite or dolomite [one sample] content is ranging between major through&amp;nbsp;medium values. The presence of the magnesian calcite, which was found in two samples, is&lt;/div&gt;
&lt;div&gt;most likely attributed to biological sources (i.e. epiphytes, shells, etc), as commonly occur&amp;nbsp;white colonies of small coral-like assemblages stack on the permanently wet pebbles&amp;nbsp;observed close to the river banks.&amp;nbsp;Sodium feldspars predominantly albite] are present in half of the samples as medium&amp;nbsp;component and as trace component in the other half. By contrast, potassium feldspars [mainly&amp;nbsp;orthoclase] are always present in minor/trace amounts. The presence of clay minerals, when&amp;nbsp;considered as a group, is that of a medium or minor component. As the clay minerals content&amp;nbsp;increases, the water has more suspended particles, so the river's turbidity during stormy events&amp;nbsp;is strongly influenced. The higher content of clay minerals in the samples of Mesochora&amp;nbsp;(downstream) indicates a different source of sediment from that of the other samples.&amp;nbsp;By comparing the mineralogical analysis results with river water chemical analysis results&amp;nbsp;from the same sampling sites, it becomes evident that the analyzed sediments do not provide&amp;nbsp;the river waters with ions, as can be deduced from the low content of alkalies and alkaline&amp;nbsp;earth metals. Sulphates and chlorides were detected in trace amounts in the water samples,&amp;nbsp;whereas no sulphate minerals or halides there were detected in the sediments analysed. It is&amp;nbsp;therefore concluded that there is not any buried evsaporite source in the vicinity of the&amp;nbsp;sampling areas. In addition, the significantly low content of nitrates, nitrites and ammonia&amp;nbsp;demonstrate the nonexistent contamination from biogenic factors.&amp;nbsp;Another factor that plays a crucial role in the ecological status of the river is the availability of&amp;nbsp;sediment for the development and maintenance of suitable habitats for the icthyofauna. The&amp;nbsp;composition and structure of sediments affect their transportation and deposition behaviour&amp;nbsp;which impacts the substrate of the river habitats. To assess this aspect in the study area,&amp;nbsp;habitat suitability curves for specific fish species have been used that describe the best&amp;nbsp;substrate for the necessary river habitats to support the breeding and reproduction of the&amp;nbsp;particular fish species. The representation of the sample sediments in the substrate types&amp;nbsp;required has been estimated by combining the results from habitat mapping, suitability curves&amp;nbsp;and the sediment analyses. The results indicated that the type of material available in the&amp;nbsp;particular river segments is appropriate for the maintenance and development of the habitat&amp;nbsp;types that are required for a good ecological status.&lt;/div&gt;</style></abstract></record></records></xml>