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The caddislfies fauna is poorly known in the karstic area which covers about 50% of the entire territory of the Republic of Croatia. The Krka River is a karstic Mediterranean river with specific travertine barriers and 2 lakes. The spring of the Krka River is located 45 kilometres from the coast. The river flows into the Adriatic Sea near the city of Šibenik. In 1998 and 1999, systematic collecting of Trichoptera was performed in that area, and in 2000, 2005, 2007 and 2009 caddisflies were collected periodically. Sampling was performed at 9 locations representing  different types of habitats: springs, travertine barriers, upper, middle and lower parts of the Krka River and lakes. During 16 on–site visits, 4792 adults were collected, belonging to 50 species. Diversity, distribution, ecology and biogeography of this material were analyzed.

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The application of municipal sewage sludge as fertilizer in the production of non-food energy crops is an environmentally and economically sustainable approach to sewage sludge management. In addition, the application of municipal sewage sludge to energy crops such as Miscanthus x giganteus is an alternative form of recycling nutrients and organic material from waste. Municipal sewage sludge is a potential source of heavy metals in the soil, some of which can be removed by growing energy crops that are also remediation agents. Therefore, the objective of the research was to investigate the effect of municipal sewage sludge applied at three different rates of 1.66, 3.22 and 6.44 t/ha on the production of Miscanthus. Based on the analyses conducted on the biomass of Miscanthus fertilized with sludge from the wastewater treatment plant in three fertilization treatments, it can be concluded that the biomass of Miscanthus is a good feedstock for the process of direct combustion. Moreover, the application of the largest amount of municipal sewage sludge during cultivation had no negative effect on the properties of Miscanthus biomass. Moreover, the cellulose and hemicellulose content of Miscanthus is ideal for the production of second-generation liquid biofuels. Fertilizer treatments had no effect on the content of cellulose and lignin, while a significant statistical difference was found for hemicellulose.