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Charalampos Dimitriadis

Charalampos Dimitriadis
Management Unit of Zakynthos and Ainos National Parks and Protected Areas of the Ionian islands. Natural Enviroment & Climate Change Agency · National marine park of Zakynthos

PhD in Marine Ecology and Biodiversity

About

91
Publications
20,047
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Introduction
Charalampos Dimitriadis currently works at the Management Unit of Zakynthos and Ainos National Parks and Protected Areas of the Ionian islands, which forms part of the Natural Environment & Climate Change Agency (NECCA) that is a public entity in charge of protected areas management in Greece
Additional affiliations
October 2019 - present
Ionian University
Position
  • Lecturer
September 2014 - March 2016
Technological Educational Institute of Ionian Islands
Position
  • Lecturer
January 2011 - present
The National Marine Park of Zakynthos
The National Marine Park of Zakynthos
Position
  • Head of Department

Publications

Publications (91)
Article
Full-text available
Extreme regional ocean warming events, like marine heatwaves (MHWs), could have severe and long-lasting impacts on species and ecosystems. Extreme and persistent warming of the ocean could directly threaten survival of marine species, as exceeding their thermal tolerance often leads to massive mortality events. Similarly, MHWs could further threate...
Article
Achieving sound management of small‐scale fisheries (SSFs) is globally recognized a key priority for sustaining livelihoods, local economies, social wealth and cultural heritage in coastal areas. The paucity of information on SSFs often prevents the proper assessment of different socio‐ecological aspects, potentially leading to draw inappropriate c...
Article
Full-text available
Sea level rise could result in the loss and shrinkage of coastal habitats, jeopardizing the persistence of a number of species that rely upon these highly dynamic and sensitive areas. With reproduction and population recruitment depending exclusively on low-lying sandy beaches, marine turtles are among the organisms for which sea level rise represe...
Article
Full-text available
Small-scale fisheries (SSFs) in the Mediterranean and Black seas play a significant social and economic role, representing 84% of the fishing fleet (70,000 vessels), 26% of total revenue (USD 633 million) and 60% of total employment (150,000 people), with the Food and Agriculture Organization (FAO) recently taking important initiatives to sustain l...
Article
While polyandry in sea turtles is indicated through multiple-paternity analyses of off�spring, confirmed observations of the same female mating with multiple males are extremely challenging to obtain. To contribute to this discussion, we analysed a long�term photo-identification database (>20 years) of adult male and female loggerhead sea turtles...
Article
Sea turtles are highly mobile species that use oceanic, neritic, and coastal habitats as nursery, foraging, wintering, breeding and migration areas at distant locations throughout their lifetime. Due to their highly migratory nature and large-scale habitat use, they are subjected to multiple threats across marine and coastal ecosystems that can im...
Article
Identification of important habitats of charismatic marine megafauna is essential to enhance our conservation capacity. Still, for species like sea turtles that have a long-life span, a complex life history and a highly migratory nature, spatially delineating important marine areas is not a simple task. Even in the case that such areas could be ide...
Article
Full-text available
Understanding the interactions among invasive species, native species and marine protected areas (MPAs), and the long-term regime shifts in MPAs is receiving increased attention, since biological invasions can alter the structure and functioning of the protected ecosystems and challenge conservation efforts. Here we found evidence of marked modific...
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
The study attempts to assess the retreat of a section of a bounding sea cliff promontory, exposed to wave forcing from both sides, of an important Mediterranean sea-turtle nesting beach, within a Mediterranean marine protected area (Gerakas, Zakynthos Island, Greece). Morphological changes were monitored within a 2-year period using a terrestrial l...
Article
While in recent years intermittent rivers and ephemeral streams (IRES) are receiving increasing attention from ecologists, fish metacommunity dynamics have drawn less attention than other taxa. In this study, we explored fish metacommunity dynamics at a Mediterranean intermittent river (Evrotas River, Southern Greece) to unravel which factors (i.e....
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
Here we present an update of the Mediterranean distribution of the lionfish Pterois miles, based on a comprehensive list of geo-referenced occurrences up to October 2019. New data were provided by multiple reporting tools and citizen science initiatives. Our findings suggest that well established populations of P. miles exist in the Levantine Sea,...
Article
Full-text available
Ecosystem-based management requires an assessment of the cumulative effects of human pressures and environmental change. The operationalization and integration of cumulative effects assessments (CEA) into decision-making processes often lacks a comprehensive and transparent framework. A risk-based CEA framework that divides a CEA in risk identifica...
Article
Nematodes represent an important group of animals in the decomposer food web, because of high diversities, abundances and functional roles supporting ecological processes, such as decomposition. They have been relatively well studied in numerous ecosystems, but have rather skipped attention in sea turtle nests at sandy shores, where a massive suppl...
Article
Full-text available
The presence of the Red Sea Mantis shrimp Erugosquilla massavensis (Kossmann, 1880) is here reported for the first time from the southeastern Ionian Sea (Zakynthos Island, Greece). This record is the first evidence of the presence of a Lessepsian migrant crustacean in the aforementioned area while it fills the gap in the ongoing westward and northw...
Article
The ecological management effectiveness (EME) of Marine Protected Areas (MPAs) is the degree to which MPAs reach their ecological goals. The significant variability of EME among MPAs has been partly explained by MPA design, management and implementation features (e.g. surface area, enforcement, age of protection). We investigated EME variability by...
Article
Full-text available
In this work, multibeam echosounder (MBES) and dual frequency sidescan sonar (SSS) data are combined to map the shallow (5–100 m) benthic habitats of the National Marine Park of Zakynthos (NMPZ), Greece, a Marine Protected Area (MPA). NMPZ hosts extensive prairies of the protected Mediterranean phanerogams Posidonia oceanica and Cymodocea nodosa, a...
Article
Full-text available
The NaGISA project (Natural Geography Ιn Shore Areas) is a global initiative within the framework of the Census of Marine Life. The Mediterranean Sea has joined with 4 stations, 2 in Italy and 2 on the island of Crete, Greece. Two different sites were sampled during two consecutive years (2007 and 2008) by means of SCUBA diving. On the basis of the...
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...
Article
The efficacy of a Mediterranean Marine Protected Area (National Marine Park of Zakynthos – NMPZ, Ionian Sea, Greece) that implements a seasonal no-take zone as part of its management scheme was assessed using fish data collected in situ with underwater visual census. Sampling was conducted at two habitat types (Posidonia oceanica meadows and rocky...
Article
Full-text available
Hard substrates host globally a rich biodiversity, orders of magnitude higher in species number than that in surrounding soft substrates. Among them, marine caves support unique biodiversity and fragile communities but suffer lack of quantitative data on their structure and function, hindering their conservation status assessment. A first approach...
Data
Number of taxa (N) per trait and modality and their distribution (Di) along the horizontal axis, and position on the walls (Po) of the surveyed caves. OUT, outer zone; 0–30, distance from entrance in meters; C, cave ceiling; L. left wall; R, right wall. (PDF)
Data
Summary of (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the successive pairs of distance levels (5 m intervals) along the horizontal axis of Fara cave (Two-way crossed SIMPER analysis results), indicated with grey color. ns, non-significant difference according to the results of PERMANOVA. For abbr...
Data
Summary of (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the different positions in Agios Vasilios cave (Two-way crossed SIMPER analysis results), indicated with grey color. C, cave ceiling; L, left wall; R, right wall. For abbreviations of modalities see S2 Table. (PDF)
Data
Coverage by photoquadrat and trait by taxon data matrices. (XLSX)
Data
Summary of sponge (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the successive pairs of distance levels (5 m intervals) along the horizontal axis of Fara cave (Two-way crossed SIMPER analysis results), indicated with grey color. ns, non-significant difference according to the results of PERMANOVA. F...
Data
Summary of sponge (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the different positions in Fara cave (Two-way crossed SIMPER analysis results), indicated with grey color. C, cave ceiling; L, left wall; R, right wall; ns, non-significant difference according to the results of PERMANOVA. For abbreviat...
Data
Taxa recorded and their mean percent coverage (Co), distribution (Di) along the horizontal axis, and position on the walls (Po) of the surveyed caves. OUT, outer zone; 0–30, distance from entrance in meters; C, cave ceiling; L. left wall; R, right wall. Data on Porifera are according to [36]. (PDF)
Data
Ranking (1–4) of the measured sources of variation of PERMANOVA test results in the studied caves. Di, distance from entrance; Po, position on the cave walls; TCS, total community structure; TCF, total community function; SCS, sponge community structure; SCF, sponge community function. (PDF)
Data
Summary of (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the different positions in Fara cave (Two-way crossed SIMPER analysis results), indicated with grey color. C, cave ceiling; L, left wall; R, right wall; ns, non-significant difference according to the results of PERMANOVA. For abbreviations of...
Data
Summary of sponge (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the successive pairs of distance levels (5 m intervals) along the horizontal axis of Agios Vasilios cave (Two-way crossed SIMPER analysis results), indicated with grey color. ns, non-significant difference according to the results of PE...
Data
Coverage per taxon along the horizontal axis of the ceiling, left wall and right wall of Fara and Agios Vasilios caves. Standard error of mean (SE) is presented in error bars. (TIF)
Data
Summary of (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the successive pairs of distance levels (5 m intervals) along the horizontal axis of Agios Vasilios cave (Two-way crossed SIMPER analysis results), indicated with grey color. For abbreviations of modalities see S2 Table. (PDF)
Data
Summary of sponge (A) taxa and (B) traits contributing by 50% to the calculated Bray-Curtis dissimilarity between the different positions in Agios Vasilios cave (Two-way crossed SIMPER analysis results), indicated with grey color. C, cave ceiling; L, left wall; R, right wall; ns, non-significant difference according to the results of PERMANOVA. For...
Article
Full-text available
Marine protected areas (MPAs) have largely proven to be effective tools for conserving marine ecosystem, while socio-economic benefits generated by MPAs to fisheries are still under debate. Many MPAs embed a no-take zone, aiming to preserve natural populations and ecosystems, within a buffer zone where potentially sustainable activities are allowed...
Article
Full-text available
Background Over the last decade, inventorying and monitoring of marine biodiversity has significantly benefited from the active engagement of volunteers. Although several Citizen Science projects concern tropical reef ecosystems worldwide, none of the existing initiatives has yet specifically focused on their Mediterranean equivalents. Mediterranea...
Data
CIGESMED για δύτες, πολίτες-επιστήμονες για το πρόγραμμα παρακολούθησης των κοραλλιγενών οικοτόπων
Data
CIGESMED for divers – Citizen Science for CIGESMED
Data
CIGESMED pour les plongeurs – Les sciences participatives pour CIGESMED
Data
CIGESMED per i subacquei - Citizen science per CIGESMED
Data
CIGESMED for divers – Citizen Science for CIGESMED
Data
Dalgıçlar için CIGESMED – CIGESMED için Vatandaş Bilimi
Data
Dalgıçlar için CIGESMED – CIGESMED için Vatandaş Bilimi
Data
CIGESMED για δύτες, πολίτες-επιστήμονες για το πρόγραμμα παρακολούθησης των κοραλλιγενών οικοτόπων
Data
CIGESMED pour les plongeurs – Les sciences participatives pour CIGESMED
Data
CIGESMED per i subacquei - Citizen science per CIGESMED
Presentation
Full-text available
Η ΒΙΟΠΟΙΚΙΛΟΤΗΤΑ ΤΗΣ ΟΡΝΙΘΟΠΑΝΙΔΑΣ ΣΤΗΝ ΠΕΡΙΟΧΗ ΤΟΥ ΕΘΝΙΚΟΥ ΘΑΛΑΣΣΙΟΥ ΠΑΡΚΟΥ ΖΑΚΥΝΘΟΥ Καρρής Γ1, Ξηρουχάκης Σ2, Ποϊραζίδης Κ1, Κόκκαλη Α3, Γρίβας Κ4, Ευαγγελίδης Α5, Δημητριάδης Χ 6, Καραγιάννη Π7 1Τμήμα Τεχνολόγων Περιβάλλοντος , ΤΕΙ Ιονίων Νήσων/ 2Μουσείο Φυσικής Ιστορίας Κρήτης, Πανεπιστήμιο Κρήτης/ 3Ινστιτούτο Θαλάσσιων Βιολογικών Πόρων και Εσω...
Poster
Full-text available
ΟΙΚΟΛΟΓΙΚΗ ΕΡΕΥΝΑ ΓΙΑ ΤΗΝ ΠΡΟΣΤΑΣΙΑ ΚΑΙ ΔΙΑΧΕΙΡΙΣΗ ΤΟΥ ΕΘΝΙΚΟΥ ΘΑΛΑΣΣΙΟΥ ΠΑΡΚΟΥ ΖΑΚΥΝΘΟΥ Δημητριάδης Χ, Sourbès L, Βαλλή Α.Θ, Κάλλη Ε, Αρβανιτίδης Χ, Κατσανεβάκης Σ, Καρρής Γ, Μαζάρης Α.Δ, Τσίκληρας Α, Κουτσούμπας Δ Τα μέχρι σήμερα αποτελέσματα της επιστημονικής έρευνας στα όρια εξάπλωσης του Εθνικού Θαλάσσιου Πάρκου Ζακύνθου υποδεικνύουν ότι το πρ...
Conference Paper
Full-text available
Mediterranean coralline reefs, known as " coralligenous " , are bioherms built by calcifying rhodophytes on hard substrates in dim-light conditions. They are hotspots of biodiversity, harbouring rich assemblages and valuable biological resources. The assemblages they host are popular among SCUBA divers due to their complex structure, conspicuous bi...
Conference Paper
Full-text available
Mediterranean coralline reefs, known as " coralligenous " , are bioherms built by calcifying rhodophytes on hard substrates in dim-light conditions. They are hotspots of biodiversity, harbouring rich assemblages and valuable biological resources. The assemblages they host are popular among SCUBA divers due to their complex structure, conspicuous bi...
Conference Paper
Full-text available
Underwater rocky formations in the midlittoral and sublittoral zones of the Mediterranean coastline form part of the " Reefs " habitat type (code 1170) under the Natura 2000 Network. The aim of this study was to evaluate the ecological status of the shallower limits of this habitat type in the National Marine Park of Zakynthos (Ionian Sea, Greece)...
Article
Full-text available
Environmental change can alter both species distribution range patterns at a regional scale and their feeding habits at a local scale. While several studies have highlighted the mechanisms driving such changes separately, little is known on their combined effect on the local communities. In this manuscript, we used both feeding and distributional t...
Presentation
Full-text available
In the present study we made an effort to assess the spring flow of passerine migrants during May 2014 and 2015 in the Strofades island complex; a group of two remote islets (22m a.s.l.) in the Ionian Sea (west Greece) covering 4 km2. The avifauna community was studied through mist netting and direct observations, while density estimates were gener...
Conference Paper
Anthropogenic activities degrade natural habitats with deleterious effects for the herpetofauna. Protected areas function as conservation pockets, providing the required undisturbed habitat for the survival of many threatened species. The condition of amphibian and reptilian populations, which are important bioindicators, is of pivotal importance f...
Poster
Full-text available
Anthropogenic activities degrade natural habitats with deleterious effects for the herpetofauna. Protected areas function as conservation pockets, providing the required undisturbed habitat for the survival of many threatened species. The condition of amphibian and reptilian populations, which are important bioindicators, is of pivotal importance f...