Thanos Dailianis

Thanos Dailianis
Hellenic Centre for Marine Research | hcmr · Institute of Marine Biology, Biotechnology and Aquaculture

Marine Biologist PhD

About

149
Publications
54,258
Reads
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2,772
Citations
Introduction
Marine biologist, with a research focus on the biology of marine invertebrates, biodiversity, and ecosystem ecology through integrative approaches. An avid technical diver and coordinator of scientific surveys and field experiments. Currently working on the bioremediation potential of sponges in experimental multitrophic aquaculture.
Additional affiliations
January 2011 - December 2012
Aristotle University of Thessaloniki
January 2008 - present
Hellenic Centre for Marine Research
Education
February 2005 - July 2011
September 2001 - January 2003
University of the Aegean
Field of study
  • Marine Science
September 1992 - March 1998

Publications

Publications (149)
Article
Full-text available
Chronic discharge of surplus organic matter is a typical side effect of fish aquaculture, occasionally leading to coastal eutrophication and excessive phytoplankton growth. Owing to their innate filter-feeding capacity, marine sponges could mitigate environmental impact under integrated multitrophic aquaculture (IMTA) scenarios. Herein, we investig...
Article
Full-text available
Although more than 600 marine caves have been recorded so far along the Greek coasts of the Aegean Sea (Eastern Mediterranean), only a few have been systematically studied for their biodiversity. In this study, the benthic communities of six marine caves within a Protected Area of South-Eastern Aegean were studied for the first time, both qualitati...
Article
Full-text available
The colonization of artificial structures by benthic organisms in the marine realm is known to be affected by the general trophic patterns of the biogeographical zone and the prevailing environmental traits at the local scale. The present work aims to present quantitative data on the early settlement progress of macrofaunal benthic assemblages deve...
Article
Full-text available
Restoration is considered an effective strategy to accelerate the recovery of biological communities at local scale. However, the effects of restoration actions in the marine ecosystems are still unpredictable. We performed a global analysis of published literature to identify the factors increasing the probability of restoration success in coastal...
Article
Full-text available
Biological invasion is one of the main components of global changes in aquatic ecosystems. Unraveling how establishment in novel environments affects key biological features of animals is a key step towards understanding invasion. Gut microbiome of herbivorous animals is important for host health but has been scarcely assessed in invasive species....
Article
1. Sound production represents an integral part of social communication in many teleost fish; however, few studies have investigated the structure, organization and variability of fish sounds at the community level. 2. Fish acoustic community structure was recorded simultaneously in three sites located along the Mediterranean basin within the ende...
Article
Full-text available
Coastal countries have traditionally relied on the existing marine resources (e.g., fishing, food, transport, recreation, and tourism) as well as tried to support new economic endeavors (ocean energy, desalination for water supply, and seabed mining). Modern societies and lifestyle resulted in an increased demand for dietary diversity, better healt...
Conference Paper
Full-text available
Monitoring marine biodiversity in hard-bottom habitats is challenging as it typically involves resource-intensive, non-standardized, and often destructive sampling methods that limit its scalability. Differences in monitoring approaches furthermore hinder inter-comparison among monitoring programs. Standardised collectors such as Artificial Reef Mo...
Article
Full-text available
Coastal countries have traditionally relied on the existing marine resources (e.g., fishing, food, transport, recreation, and tourism) as well as tried to support new economic endeavors (ocean energy, desalination for water supply, and seabed mining). Modern societies and lifestyle resulted in an increased demand for dietary diversity, better healt...
Article
Full-text available
Coastal countries have traditionally relied on the existing marine resources (e.g., fishing, food, transport, recreation, and tourism) as well as tried to support new economic endeavors (ocean energy, desalination for water supply, and seabed mining). Modern societies and lifestyle resulted in an increased demand for dietary diversity, better healt...
Article
Full-text available
Marine hard-bottom communities are undergoing severe change under the influenceof multiple drivers, notably climate change, extraction ofnatural resources, pollutionand eutrophication, habitat degradation, and invasive species. Monitoring marinebiodiversity in such habitats is, however, challenging as it typically involves expensive,non-standardize...
Article
Full-text available
Marine hard-bottom communities are undergoing severe change under the influence of multiple drivers, notably climate change, extraction of natural resources, pollution and eutrophication, habitat degradation, and invasive species. Monitoring marine biodiversity in such habitats is, however, challenging as it typically involves expensive, non-standa...
Article
Full-text available
Marine hard-bottom communities are undergoing severe change under the influence of multiple drivers, notably climate change, extraction of natural resources, pollution and eutrophication, habitat degradation, and invasive species. Monitoring marine biodiversity in such habitats is, however, challenging as it typically involves expensive, non-standa...
Article
Full-text available
The Mediterranean endemic fan mussel Pinna nobilis is suffering an ongoing basin-scale mass mortality event (MME) since 2016. As most Mediterranean populations have collapsed, the species has been declared as Critically Endangered in the IUCN Red List of threatened species. In an effort to track the progress of the MME and provide updated informati...
Article
Full-text available
• 1. The coralligenous habitat was studied at the large Mediterranean scale, by applying a standardized, non‐destructive photo‐sampling protocol, developed in the framework of the CIGESMED project. • 2. The results provided evidence to support the following statements: (a) the assemblage pattern is not homogeneously distributed across the four Medi...
Article
Full-text available
Marine organisms produce a vast diversity of metabolites with biological activities useful for humans, e.g. cytotoxic, antioxidant, anti-microbial, insecticidal, herbicidal, anticancer, pro-osteogenic and pro-regenerative, analgesic, anti-inflammatory, anti-coagulant, cholesterol-lowering, nutritional, photoprotective, horticultural or other benefi...
Article
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Good datasets of geo-referenced records of alien species are a prerequisite for assessing the spatio-temporal dynamics of biological invasions, their invasive potential, and the magnitude of their impacts. However, with the exception of first records on a country level or wider regions, observations of species presence tend to remain unpublished, b...
Article
Full-text available
Good datasets of geo-referenced records of alien species are a prerequisite for assessing the spatio-temporal dynamics of biological invasions, their invasive potential, and the magnitude of their impacts. However, with the exception of first records on a country level or wider regions, observations of species presence tend to remain unpublished, b...
Article
Full-text available
Global change impacts Mediterranean fisheries and the dependent human populations. Overfishing and epizootic diseases related to extreme climatic events are currently accepted as the main threats to the production of commercial bath sponges. Believing that other factors could have impacted this insular fishery, we assembled a 150-year-long series o...
Article
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The emblematic sponge Spongia officinalis is currently threatened by recurrent mortality incidents in its native habitats. Elevated temperature has been indicated as a major triggering factor, but the molecular mechanisms recruited for the organism's response to thermal shifts are yet unknown. Here, we experimentally tested the effect of exposure t...
Article
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The administration of antibiotics in aquaculture has raised concern about the impact of their overuse in marine ecosystems, seafood safety and consumers' health. This "green consumerism" has forced researchers to find new alternatives against fish pathogens. The present study focused on 12 Mediterranean medicinal-aromatic plants as potential antimi...
Article
Full-text available
Objectives: We report a transcriptome acquisition for the bath sponge Spongia officinalis, a non-model marine organism that hosts rich symbiotic microbial communities. To this end, a pipeline was developed to efficiently separate between bacterial expressed genes from those of eukaryotic origin. The transcriptome was produced to support the assess...
Article
Full-text available
In marine ecosystems, sponges are ubiquitous sessile organisms that contain a wide range of specialized metabolites. These metabolites point to a diverse range of biochemical pathways. Some of these compounds are biomarkers that indicate the presence of bacteria that form symbiotic relationships with a host sponge (microsymbionts). Sponges hold con...
Presentation
Full-text available
Passive acoustic monitoring (PAM) uses hydrophones to record all components of underwater soundscapes, including fish calls. Several studies have used PAM to investigate different aspects of vocal fish species, such as presence, distribution, relative abundance, diel, lunar and seasonal cycle of activity as well as for delimitating spawning areas a...
Article
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The present study aimed to evaluate the impact of polycyclic aromatic hydrocarbons (PAHs) produced by multiple emission sources on prokaryotic communities in sediments chronically affected by anthropogenic pressures. In this context, surface sediments were investigated in three Mediterranean touristic ports over three sampling periods and in differ...
Poster
Full-text available
While aquaculture is outpacing food production from capture fisheries and expected to play a major role in future economies, it exerts pressure to adjacent marine habitats mainly via the release of organic load and other substances. Among bioremediation candidates to mitigate organic pollution, sponges appear prominent due to specific traits includ...
Conference Paper
Full-text available
Marine caves constitute unique biodiversity reservoirs of high conservation value. Nevertheless, marine caves of the Aegean Sea have been studied less intensively than those in other Mediterranean regions. In this study, benthic biodiversity and physicochemical parameters were investigated for the first time in the Elephant Cave of Crete (Greece),...
Conference Paper
Full-text available
The Underwater Biotechnological Park of Crete (UBPC) is an applied research infrastructure established in 2015 at the island of Crete (Aegean Sea, Eastern Mediterranean), occupying a seafloor area of 2.5 hectares at depths between 18 and 22 m. Its main objectives are: (a) the continuous monitoring of coastal environmental parameters; (b) the experi...
Conference Paper
Full-text available
Two decades ago, a unique marine cave was discovered in Crete (Greece, Eastern Mediterranean). The so-called Elephant Cave was very soon meant to become one of the most iconic diving destinations in the island. It stands out for its aesthetic value with a variety of speleoforms and the remaining fossil bones of deers and a dwarf elephant which are...
Poster
Sponges are organisms with simple body plan, without true tissue differentiation. Moreover, they are notorious for hosting rich, regulated symbiotic bacterial communities, thus creating the sponge holobiont. These traits, combined with the expansive and diverse nature of the poriferan phylum and the fact that only two sponge species have been seque...
Article
Ports are open systems with direct connection to the sea, therefore any potential impact on port waters may have implications for the health of adjacent marine ecosystems. European WFD addressed ports in the category of Heavily Modified Water Bodies (HMWBs) and promoted implementation of protocols to monitor and improve their ecological status. TRI...
Conference Paper
Full-text available
The Aegean Sea hosts a considerable number of marine caves, the great majority of which are located in the island-dominated South Aegean region. Herein, nine marine caves from different Aegean islands were investigated for the first time by means of SCUBA diving and non-destructive sampling (photoquadrats). A total of 70 taxa belonging to 8 taxonom...
Article
Full-text available
Mediterranean marine caves remain largely unexplored, while particularly limited information is available about microbial life in these unique environments. This study is a preliminary assessment of the composition of the active anaerobic microbial community colonizing the walls of newly explored systems of underwater caves and small cavities in Za...
Poster
Full-text available
Artificial reefs (ARs) are submerged man-made constructions aiming to enrich the marine life of a given area providing shelter and facilitating the attraction and concentration of several taxa (Klaoudatos et al. 2012). The functional and morphological characteristics of the innovative ARs deployed by the Hellenic Centre for Marine Research (HCMR) i...
Poster
Full-text available
Introduction/Aim: Within the last decades several Artificial Reefs (ARs) have been deployed in the European seas as a measure for the enhancement of fish stocks and to a lesser extent for the protection and enhancement of seabed habitats (Fabi et al. 2011). The “HCMR Recreational Diving OasisTM” constitutes an innovative concept based on the constr...
Article
Full-text available
Sponges are among the less-studied benthic invertebrates as regards their extinction risk and conservation status. Herein, we evaluate the regional conservation status of sponges in the Aegean ecoregion (Eastern Mediterranean Sea), using the IUCN Red List criteria. We examined 20 sponge taxa falling into three categories: i) threatened species list...
Preprint
Full-text available
A review of 573 studies on active restoration actions in the marine environment, published in the last 25 years, was carried out at global scale. We assessed how, where, at which spatial and temporal scales and under which socio-ecological settings restoration studies have been carried out, from very shallow to deep sea habitats. Results show that...
Preprint
Full-text available
A review of 573 studies on active restoration actions in the marine environment, published in the last 25 years, was carried out at global scale. We assessed how, where, at which spatial and temporal scales and under which socio-ecological settings restoration studies have been carried out, from very shallow to deep sea habitats. Results show that...
Article
Full-text available
The Mediterranean Sea is one of the busiest areas worldwide in terms of maritime activity, facing considerable anthropogenic disturbance, such as pollution by hydrocarbons and heavy metals. The present study has evaluated the environmental and benthic biodiversity characteristics of three touristic ports, Cagliari (Sardinia, Italy), Heraklion (Cret...
Technical Report
Full-text available
MERCES is producing a census of European marine key habitat maps, degraded habitat maps and investigating key habitat restoration potential.
Technical Report
Full-text available
The overall scope of MERCES Deliverable 1.2 is to review current knowledge regarding the major marine pressures placed upon marine ecosystems in EU waters and the mechanisms by which they impact habitats in order to determine potential restoration pathways.
Article
Full-text available
The effective conservation of marine biodiversity through an integrated ecosystem-based management approach requires a sound knowledge of the spatial distribution of habitats and species. Although costly in terms of time and resources, acquiring such information is essential for the development of rigorous management plans and the meaningful priori...