Hellenic Centre for Marine Research

Marine Heat Waves and Cold Spells – Multiple Analysis/Definitions (MHW-MAD): A Multi-Definition Global Marine Heatwave Database from Satellite Sea Surface Temperature Data

Marine heatwaves (MHWs) are prolonged anomalies of warm sea surface temperature (SST) that can disrupt marine ecosystems, physical climate processes, and human coastal activities. MHW definitions vary due to different stakeholders requirements, such as ecological scientists and c...

Response of the Carbonate System to Ocean Alkalinity Enhancement: A Mesocosm-Scale Experiment

Abstract We present the results of a mesocosm-scale experiment conducted in 2023 in the eastern Mediterranean Sea (Crete, Greece) to evaluate the effects of ocean liming via the addition of calcium hydroxide. We assessed two dosage regimes through repeated additions─low (20 μmol...

Integrative taxonomy reveals multiple Mediterranean invasions by Indo-Pacific Dorvillea (Annelida, Dorvilleidae)

Abstract Biological invasions are a major driver of global biodiversity loss, with the Mediterranean Sea among the most heavily invaded marine regions. However, identification and monitoring of Non-Indigenous Species (NIS) are hindered by taxonomic uncertainty and cryptic diversi...

Availability and representativeness of freshwater macroinvertebrate data to enable Europe-wide assessment of biodiversity trends

Freshwater ecosystems, though covering less than 1% of Earth's surface, harbor around 10% of all species. Pressures like pollution, water extraction, and habitat loss can exhibit complex interactions in their effects on freshwater biodiversity. Understanding the effects of these...