Markos Digenis

Markos Digenis
Ionian University | IONIO · Department of Environmental Sciences

About

19
Publications
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63
Citations

Publications

Publications (19)
Conference Paper
Full-text available
Brachiopods, though common in marine caves, have been so far rarely reported from caves of the Eastern Mediterranean Sea. Herein we present new records of brachiopods collected in eleven marine caves located on eight Greek islands (Kastelorizo, Rhodes, Crete, Samos, Agios Efstathios, Polyaigos, Pantieronissi and Skyros). Four species (60 individual...
Poster
Full-text available
Although Mediterranean marine caves have been characterized as biodiversity reservoirs and vulnerable habitats, little is known about the threats they may face. The invasive macroalgae Rugulopteryx okamurae is rapidly spreading along the Western Mediterranean Sea displacing native sessile competitors through space monopolization but also negatively...
Conference Paper
Full-text available
Although Mediterranean marine caves have been characterized as biodiversity reservoirs and vulnerable habitats, little is known about the threats they may face. The invasive macroalgae Rugulopteryx okamurae is rapidly spreading along the Western Mediterranean Sea displacing native sessile competitors through space monopolization but also negatively...
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...
Poster
Full-text available
Although marine caves are considered as biodiversity reservoirs, little is known about their mobile inhabitants. Thus, in the framework of the research program ALAS, both the abundance and species richness of mobile fauna were recorded at 12 marine caves across the Aegean Sea. A total of 14 alien species were recorded with higher abundance at the s...
Article
Full-text available
This Collective Article presents information about 27 taxa belonging to five Phyla (one Ochrophyta, one Cnidaria, three Arthropoda, two Mollusca and twenty Chordata) and extending from the Western Mediterranean Sea to the Levantine Sea and the Black Sea (Sea of Marmara). The new records were reported from 11 countries as follows: Algeria: occurrenc...
Article
Intertidal ecosystems are key habitats that are being replaced by artificial hard substrates due to the increment of human activities in coastal areas. These new substrates host generally less biodiversity mainly due to differences in complexity and composition. It is a global phenomenon and has led to the development of strategies in the framework...
Article
Full-text available
Data on the distribution and ecology of cryptobenthic fish of marine caves in the Mediterranean Sea are extremely scarce but necessary for scientists and marine managers alike in order to understand these fish’s ecological role and assess their conservation status. Broadscale surveys by implementing underwater visual census and photographic samplin...
Thesis
Full-text available
Sea caves constitute underwater cavities of various forms mostly filled with sea water. From the first studies on marine caves in the early 1950’s, scientists recorded a rich biodiversity in their interior unveiling new information about this unique marine ecosystem. Marine caves were soon considered as a habitat of European interest (type 8330 in...
Article
Full-text available
Urocaridella pulchella Yokeş & Galil, 2006 is a palaemonid cleaner-shrimp of Indo-Pacific origin that was first described from the Mediterranean Sea in 2006. However, limited information is available about its distribution and ecology due to the small size and cryptic habit of the species. We hereby report the first records of U. pulchella in marin...
Article
Full-text available
This article includes 23 new records of alien and cryptogenic species in the Mediterranean Sea, belonging to 4 Phyla (Chordata, Echinodermata, Arthropoda and Mollusca), distributed from the Alboran to the Levantine Sea. Records are reported from eight countries listed from West to East as follows: Algeria: new records of the Atlantic blue crab Call...
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
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
The lobate ctenophore Leucothea multicornis (Quoy & Gaimard, 1824) was recorded off Kefalonia Island , Greece, in July 2019. This new record, in the Eastern Ionian Sea, fills distribution gaps between the central Mediterranean basin and the Levantine Sea.
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
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...

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Projects

Projects (2)
Project
ALAS aims to fill knowledge gaps on the impacts of marine alien species in the Aegean Sea, and support marine managers and policy makers in prioritizing mitigation actions. ALAS will improve our knowledge base by (1) conducting a series of field experiments and surveys to investigate the impacts of selected invasive alien species on marine habitats, (2) producing high-resolution habitat maps in the coastal zone, refining the results of previous research efforts through fieldwork, remote sensing and satellite imaging, (3) producing species distribution models for all invasive species, based on extensive underwater surveys for the collection of new data and integrating all existing information.
Project
Our goal is gathering all published information in as many languages as possible on in order to produce an open access database that facilitate future research in subterranean aquatic environments. Data will be gather for all groups of animals. The geographical scope is global, and it covers all types of so-called subterranean habitats ranging from freshwater and marine caves to hyporheic and interstitial environments. The project is part of the MSCA-IF-2016 "ANCAVE: Anchialine caves to understand evolutionary processes" granted to Alejandro Martinez and hosted by Diego Fontaneto (IRSA-CNR, Verbania).