Johann Galdies

Johann Galdies
University of Malta · Faculty of Science

B.Sc. (Hons) Biology & Chemistry (Melit.), M.Sc. STPE Paleontology & Paleoclimatology

About

15
Publications
3,371
Reads
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36
Citations
Additional affiliations
November 2021 - May 2022
University of Malta
Position
  • Research Officer
Description
  • MEDIBEES project
December 2019 - present
University of Malta
Position
  • Research Officer
Description
  • Interreg Italia-Malta projects: HARMONY, BYTHOS, CORALLO.
September 2019 - January 2020
Ecoserv Ltd.
Position
  • Ornithological Field Observer
Education
September 2017 - June 2018
Université de Lille
Field of study
  • Earth Science: Palaeontology & Palaeoclimatology
October 2011 - June 2015
University of Malta
Field of study
  • Biology and Chemistry

Publications

Publications (15)
Article
Full-text available
The genus Pinna includes two species in the Mediterranean Sea: Pinna nobilis and Pinna rudis. Both these species are under threat from multiple stressors. Pinna nobilis, in particular, has been exhibiting mass mortality events (MMEs) since 2016. The population and distribution of these species have never been comprehensively explored in the Maltese...
Article
Full-text available
Maerl beds are biogenic benthic habitats distributed worldwide and known to sustain high productivity and biodiversity levels. In the Mediterranean, the number of studies that have been carried out is limited, and little is known on its real distribution, mostly due to the difficulties of exploring such habitats -Due to the high transparency of Med...
Article
Full-text available
The invasive portunid species Callinectes sapidus is hereby recorded for the first time from Maltese waters, thus updating the known distribution of this decapod of Atlantic origin within the Mediterranean. Potential introduction pathways of the species to Maltese waters are discussed.
Article
Full-text available
At the behest of the Green Deal, circular economy concepts are currently being widely promoted, not least within the aquaculture sector. The current study aims to demonstrate the technical feasibility of extracting collagen and fish oils from waste Atlantic bluefin tuna biomass originating from the Maltese aquaculture industry. For collagen, a thre...
Article
Bears exhibit marked evolution for Pleistocene Europe. Both lineages are thought to have arisen from etruscan bear U. etruscus in the Early Pleistocene, however their high degree of polymorphism has prevented the establishment of an accepted evolutionary scenario. Isotopic analysis and tooth morphology of fossil brown bear U. arctos suggests that i...
Article
Full-text available
This Collective Article includes records of 29 alien and cryptogenic species in the Mediterranean Sea, belonging to eight Phyla (Rhodophyta, Ochrophyta, Cnidaria, Annelida, Mollusca, Arthropoda, Echinodermata, and Chordata) and coming from 11 countries. Notes published here can be divided into three different categories: occupancy estimation for wi...
Article
Full-text available
Two specimens of Ablennes hians (Valenciennes, 1846) were collected between 2018 and 2020 in nearshore waters off the island of Malta. The first occurrence of the flat needlefish in the central Mediterranean, almost contemporary to its first record in the eastern Levantine Sea, is briefly discussed.
Article
Full-text available
Considerable research effort has recently been invested into the reporting of Non- Indigenous Species (NIS) within the Mediterranean Sea, with species’ first records from the Basin holding most prestige within the biological community. This invariably leads to a discard of secondary, unpublished records, which represent a vast repository of informa...
Article
Full-text available
The rapid, global spread of COVID-19, and the measures intended to limit or slow its propagation , are having major impacts on diverse sectors of society. Notably, these impacts are occurring in the context of other anthropogenic-driven threats including global climate change. Both anthropogenic stressors and the COVID-19 pandemic represent signifi...
Article
Full-text available
The rapid, global spread of COVID-19, and the measures intended to limit or slow its propagation, are having major impacts on diverse sectors of society. Notably, these impacts are occurring in the context of other anthropogenic-driven threats including global climate change. Both anthropogenic stressors and the COVID-19 pandemic represent signific...
Article
Full-text available
The second record of the Queen angelfish, Holacanthus ciliaris (Linnaeus, 1758), is hereby documented for the Mediterranean, through a single individual spearfished within Maltese coastal waters. Considerations on the potential introduction pathway for the species, which is popular in the aquarium trade, are made.
Presentation
Middle and Upper Pleistocene European bears are generally well represented in faunal accumulations, especially for the typical cave bear Ursus spelaeus. During this time interval, the bears are characterized by two major groups: the arctoid (the extinct and extant brown bear U. arctos) and the spelaean groups (the archaic cave bear U. deningeri and...
Thesis
An important debate amongst cave bear researchers is the diet and ecoethology of these animals. A great controversy surrounds the phylogenetic resolution of the cave bear lineage. Previous investigations have focussed on teeth, skull and mandibular bones. This study focuses on the morphology of metapodia as an alternative, and for the first time 3D...
Article
Full-text available
Located in the central Mediterranean Sea, the Maltese islands are prone to a set of climate change impacts that are specific to the region. Local climatological records show a warming trend of both the annual maximum and minimum temperatures, where the incidence of warmer nights is becoming increasingly common (Galdies, 2012). Warmer winters may re...
Thesis
The aims of this study were to investigate the relationships between modern pollen records and plant communities of the Maltese garrigue and to investigate the dispersal pattern of Pistacia pollen relative to the position of parent plants, wind direction and speed, slope and surface hydrological features. Samples were collected from two sites (Misr...

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Projects

Project (1)
Project
Integrating Neandertal Legacy: from past to present is a COST program (CA 19141). The main goal of this program is to create an online database where all Neandertal sites will be references with all their characteristics. See : http://inealcost.inantro.hr/