Dataset

ChEssBase

EurOBIS Open in mapper Explore occurrences

ChEssBase is a dynamic relational database for all deep-water species from chemosynthetic ecosystems (hydrothermal vents, cold seeps and other reducing environments such as whale carcasses, sunken wood or OMZs) being constructed from the ChEss project (Biogeography of Deep-Water Chemosynthetic Ecosystems) within the Census of Marine Life initiative.

Citation
Ramirez-Llodra, E., Blanco, 2005. ChEssBase: an online information system on biodiversity and biogeography of deep-sea fauna from chemosynthetic ecosystems. Version 2. World Wide Web electronic publications, http://www.noc.soton.ac.uk/chess/database/db_home.php
Published
September 17, 2025 at 09:54
License
This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License
URL
http://ipt.vliz.be/eurobis/resource?r=chessbase
Archive
https://ipt.vliz.be/eurobis/archive.do?r=chessbase

Contacts

Eva Ramirez-Llodra
University of Southampton; National Oceanography Centre, Southampton; School of Ocean & Earth Science

Flanders Marine Institute (VLIZ)
Flanders Marine Institute (VLIZ)

Sally Hall
University of Southampton; National Oceanography Centre

Maria Baker
University of Southampton; National Oceanography Centre

Daniel Perry
University of Southampton; National Oceanography Centre

3,715
total submitted occurrences
3,604
accepted occurrences
1,040
taxa
856
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 3,715
100.0%
eventDate 3,715
100.0%
maximumDepthInMeters 153
4.1%
minimumDepthInMeters 138
3.7%
scientificNameID 117 8
3.4%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
DEPTH_EXCEEDS_BATH 432
11.6%
NO_DEPTH 132
3.6%
NO_MATCH 111
3.0%
ON_LAND 100
2.7%
WORMS_ANNOTATION_REJECT_AMBIGUOUS 43
1.2%
NO_ACCEPTED_NAME 4
0.1%
WORMS_ANNOTATION_RESOLVABLE 3
0.1%

Measurement types

DNA derived data