Mass mortality events are one of the main ecological impacts related to climate change. To provide a comprehensive view both in time and geographic scale, T-MEDNet developed a collaborative database on mass mortality events.

The current dataset is extracted from information available in the published scientific literature (SCI papers, grey literature and technical reports).

However, in order to have updated view on the mass mortality events, the database is intended integrate published and non-published observations made by MPA managers, scientists or citiznes.


The Mass Mortality Events (MME-T-MEDNet) database is a collaborative initiative that aims to gather information on mass mortality events of species in the Mediterranean. The database is based in previous efforts to compile the information on mass mortality events Rivetti et al. 2014 (Rivetti et al. 2014) Marba et al. 2015 (Marba et al. 2015 ) and with the support of the MIMOSA and MPA-Adapt projects. The final goal of the MME-T-MEDNet database is to provide a comprehensive and updated dataset to support basic research and management actions in order to improve the conservation of Mediterranean.

The core data currently available in MME-T-MEDNet database was gathered from published (SCI papers, grey literature and technical reports). However, MPAs managers and researchers have non-published observations on mass mortality events that are expected to be uploaded to the database. Finally we also envisage to upload validated datasets obtained from citizen science initiatives (such as www.observadoresdelmar.es, reefcheck.it). Overall the collaborative nature of the MMEs database should support an updated and public dataset on mass mortality events in the Mediterranean.

The MME-T-MEDNet database was carefully designed to ensure a full control of the contributors on their own data status -private or public- as well as citation system, data edition among others. T-MEDNet expects that private data to become public once the datasets have been published.

The MME-T-MEDNet collaborative effort provides a unique opportunity to map and track temporal occurrence of mass mortality events in the Mediterranean Sea. The database will support analysis on the relationships with the current warming trends or other environmental conditions observed.

The public dataset from the MME-T-MEDNet database will be available by contributors for use in their own analysis. The citation system based on the specific License Creative Commons BY NC SA (License) guarantees the transparency regarding the origin of the data.

Main goals

MME-T-MEDNet database goal is to gather existing information on mass mortality events in the Mediterranean Sea.

The main objectives are:



Contact the MME-T-MEDNet Administrator for any information about the Mass Mortality Events database


Mass mortality database description

The core of the database is the data collected from observations on events at local populations level. That is that one database record corresponds to a local population and one time (or period). For the purposes of the MME-T-MEDNet database, a local population is a group of colonies (specimens/individuals) of the same species dwelling in a specific geographic location defined by its coordinates and depth range.

For each local population the following data (with the main options in parenthesis) are provided:

The full description of the fields and units used can be found in this file

For the assignment of the protection level we integrated the may 2016 version of the mapamed georeferenced database (www.mapamed.org) to the CORMedNet database.

Data submission and managing contributor’s data

Contributors should register before uploading their dataset to the MME-T-MEDNet database register . The number of obligatory fields has been kept to the minimum as possible to facilitate the data entry.

In the current version the system is set to enter single observations one by one through the Add Data tab from the menu bar Add data.

Multiple uploads are possible from spreadsheets. In order to fill in the MME-T-MEDNet database contributors’ should contact to the administrator bio-admin (at) t-mednet (dot) org to prepare the proper format for the files to be uploaded.

For non-published data the contributors are that warrant that s/he is the creator and owner of the content or otherwise has sufficient rights to be able to make the content available under the database license (License).

Through the Data explorer from the menu bar, contributors can visualize, export and edit their data points by clicking on “View my contributions”. In the “dialogue/bubble” the contributors can select to edit the information data associated to the specific observation.

Data visualization and download

Different filters can be applied to explore the data from the Data Explorer option/tab from the menu bar Data Explorer : Species, Geographic areas (by zooming in and out), Years, Ecoregions, Depth range, Degree of impact, Protection level etc…. The “Visualize all data” button can be used to deactivate the filter and to visualize all data. A registered contributor exploring data will be able to visualize its own private data, however these data will not be visible for other contributors.

To download a dataset from MME-T-MEDNet, you must register register.

Different download Options are available. The user can download:

  1. the list of references of the corresponding selected dataset
  2. the information on mass mortality events: geographic position, species, degree of impacts and references to the corresponding data.

All download options will produce an Excel file providing the data and the corresponding description information.

Please note that the system will only download the data selected according to the different filters applied to the dataset.


The MME-T-MEDNet database is public under the Creative Commons Licence BY NC SA

Creative Commons License
MME-T-MEDNet database is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Those willing to use the data set for any kind of publications they must cite the primarily resources included in the reference field (publications or other) along with the citation of the MME-T-MEDNet database. We suggest citing at least the list of references corresponding to the data points used as well as the database with following quote “Data extracted from MME-T-MEDNet database on mass mortality events in the Mediterranean t-mednet.org/MME."

Registration text

By registering, I am aware that all the data and resources available on the MME-T-MEDNet database is made available according to the terms of the Creative Commons Attribution - No 'Commercial Use – ShareAlike 4.0 International License. Authorizations beyond the scope of this license may be obtained by simple request to bio-admin (at) t-mednet (dot) org