Advances in Oceanography and Limnology <p><strong>Advances in Oceanography and Limnology</strong>&nbsp;(<em>AIOL Journal</em>) is the official publication of the <a href="" target="_blank" rel="noopener">Italian Association of Limnology and Oceanology</a> (A.I.O.L.).</p> <p>The <em>AIOL Journal </em>publishes original research articles and reviews on different topics and novel discoveries in the fields of limnology and oceanography. Papers may deal with different or single physical, chemical and biological aspects, including biomolecules, populations and communities, ecosystem functioning and interactions between global change and ecosystems. Environmental monitoring and studies of regional importance will be considered only if they contribute to the general advance of aquatic sciences. Multidisciplinary articles linking different scientific disciplines (e.g., community ecology and metabolomic/toxicology, ecology and phylogenetic, water quality and economy…) are equally considered. Particularly welcomed are studies focusing on marine and freshwater ecosystems.</p> <p>Two regular issues of the <strong>Advances in Oceanography and Limnology</strong> are published each year. In addition, Special Issues and Proceedings that focus on topics that are timely and of interest to a significant number of aquatic scientists are published. From 2010 to 2014, previous issues of the <em>AIOL Journal</em> have been published by&nbsp;<a href="">T&amp;F</a>.</p> <p>This journal does not apply charge for publication to Authors as it is supported by institutional funds.</p> PAGEPress Publications en-US Advances in Oceanography and Limnology 1947-5721 <p><strong>PAGEPress</strong> has chosen to apply the&nbsp;<a href="" target="_blank" rel="noopener"><strong>Creative Commons Attribution NonCommercial 4.0 International License</strong></a>&nbsp;(CC BY-NC 4.0) to all manuscripts to be published.<br><br> An Open Access Publication is one that meets the following two conditions:</p> <ol> <li>the author(s) and copyright holder(s) grant(s) to all users a free, irrevocable, worldwide, perpetual right of access to, and a license to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship, as well as the right to make small numbers of printed copies for their personal use.</li> <li>a complete version of the work and all supplemental materials, including a copy of the permission as stated above, in a suitable standard electronic format is deposited immediately upon initial publication in at least one online repository that is supported by an academic institution, scholarly society, government agency, or other well-established organization that seeks to enable open access, unrestricted distribution, interoperability, and long-term archiving.</li> </ol> <p>Authors who publish with this journal agree to the following terms:</p> <ol> <li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.</li> </ol> Sediment classification in a Brazilian reservoir: Pros and cons of parametric low frequencies <p>Sediment is the main factor that limits the reservoir lifetime. Therefore, sediment classification is an essential tool for planning and operating reservoir management measures. There has been important development in the hydroacoustic classification of lakebed, especially with linear systems. The main restrictions while using linear hydroacoustic systems for lakebed classification are the shallow penetration in high-frequency applications or the low vertical and horizontal resolution when using low frequencies. With the new developments in the area of echo sounders, parametric systems can achieve high penetration while preserving the high vertical and lateral resolution. To investigate the performance of parametric systems, a new lakebed classification approach was implemented by using a SES2000 Compact. The area studied was the Passauna reservoir in Parana State, Brazil. We used the first echo division method for processing the acoustic data combined with sediment core and grab sampling. The two physical parameters investigated, were the share of the finest fraction (&lt;63 µm) and wet bulk density (WBD). The results showed a high correlation between the primary frequency of 100 kHz (166 µs pulse length) and the physical parameters. Additionally, a significant correlation was observed with the acoustic parameters at 10 kHz frequency. The best correlating acoustic parameter was Attack/Decay (E1´/E1). The gas presence was found to be an important factor determining the penetration depth of the parametric system and the performance of the classification. The advantages of parametric systems, such small directivity and layering effect, represent the major restrictions in sediment classification applications.</p> Klajdi Sotiri Stephan Hilgert Stephan Fuchs ##submission.copyrightStatement## 2019-05-27 2019-05-27 10 1 10.4081/aiol.2019.7953 On the occurrence and distribution of Calanipeda aquaedulcis Kritschagin, 1873 (Copepoda, Calanoida, Pseudodiaptomidae) in Sicily, Italy, with some notes on coexistence and species replacement in calanoid copepods <p>The only population of the pseudodiaptomid copepod <em>Calanipeda aquaedulcis</em> Kritschagin, 1873 to date reported to occur in Sicily disappeared at the beginning of the XXI century due to deep environmental changes which affected the single site (Lake Biviere di Gela) known for this species on the island. In that site <em>C. aquaedulcis</em> is now replaced by <em>Copidodiaptomus numidicus </em>(Gurney, 1909)<em>, </em>a diaptomid copepod whose distribution has been greatly increasing since the second half of the last century. In the present note, the occurrence of <em>C. aquaedulcis</em> in 12 novel water bodies spread throughout Sicily is reported, and some environmental data on the sites where the species was collected are provided. Moreover, in a few sites <em>C. aquaedulcis</em> was found to co-occur with <em>Copidodiaptomus numidicus</em>. The recorded co-occurrence of these two species and the replacement of <em>C. aquaedulcis</em> with <em>C. numidicus</em> in Lake Biviere di Gela are briefly discussed.</p> Luca Vecchioni Federico Marrone Luigi Naselli-Flores ##submission.copyrightStatement## 2019-05-27 2019-05-27 10 1 10.4081/aiol.2019.8177 Remembering Alvise Vittori (Riva del Garda 1932 – Trento 2018) <p>Dr. Alvise Vittori was a well-known Italian ichthyologist, limnologist and all-round ecologist.</p> Giovanna Flaim Francesca Ciutti ##submission.copyrightStatement## 2019-05-27 2019-05-27 10 1 10.4081/aiol.2019.8286