e8f36859e456c7354a17680fe9ff9911
English
dataset
Matt Arnold
DASSH, The Archive for Marine Species and Habitat Data
matarn@mba.ac.uk
pointOfContact
2022-02-11
MEDIN Discovery metadata standard
2.3.8
urn:ogc:def:crs:EPSG::4326
2010-2013 Ryland et al. UK first Schizoporella japonica records
2014-12-31
publication
2013-01-31
creation
2022-02-11
revision
DASSHDT00000187
http://www.dassh.ac.uk
Schizoporella japonica Ortmann was described from Japan but was subsequently introduced on Pacific oysters to the Pacific coast of North America, where it is now well established. In this paper we record it for the first time in European waters. The initial discovery was in a marina at Holyhead, North Wales, in July 2010 but S. japonica has since been observed abundantly in the Orkney Islands (from May 2011) and, subsequently, at other localities in northern Scotland. Introduction seems most likely to have been on an ocean-going vessel. The British material is here fully described and illustrated with SEMs and colour photographs; some unusual characters are discussed. Unlike other recently introduced bryozoans, S. japonica is a cold-water species and its breeding season in Britain extends through the winter. Extensive confusion between this and other species of Schizoporella on the west coast of Canada and the USA led us to make thorough morphometric comparisons between the species concerned (Schizoporella unicornis (Johnston in Wood), Schizoporella errata (Waters) and Schizoporella pseudoerrata Soule, Soule and Chaney). Zooid size in cheilostomate bryozoans is variable and often an unreliable character for species separation but shape (and therefore ratios between variables,which are independent of size) are often valuable: S. japonica zooids have a much greater length:width ratio than the other species. Density of frontal pseudopores provides a useful discriminatory character. Schizoporella unicornis, repeatedly reported in error from the Pacific coast of North America, does not occur there; it is a European species. Full comparisons are made between S. japonica and S. unicornis for European identification and between S. japonica, S. errata and S. pseudoerrata (which are also illustrated) for North American localities.
John S. Ryland
University of Wales Swansea, Natural Sciences
Singleton Park
Swansea
SA2 8PP
dassh.enquiries@mba.ac.uk
originator
Data Archive for Seabed Species and Habitats (DASSH)
Data Manager
01752 633102
01752 633291
Marine Biological Association of the UK,
The Laboratory,
Citadel Hill
Plymouth
PL1 2PB
dassh.enquiries@mba.ac.uk
custodian
notPlanned
Delimited
Marine Environmental Data and Information Network
NDGO0005
Species distribution
GEMET - INSPIRE themes, version 1.0
2008-01-06
revision
Zoobenthos generic abundance
SeaDataNet P021 parameter discovery vocabulary
2009-11-16
revision
Biodiversity
GEMET
2011-07-06
creation
CC BY 4.0
otherRestrictions
DASSH terms and conditions apply
English
biota
Charting Progress 2 Sea Areas
2009-06-18
creation
Western Channel and Celtic Sea
Charting Progress 2 Sea Areas
2009-06-18
creation
Irish Sea
Charting Progress 2 Sea Areas
2009-06-18
creation
Northern North Sea
Charting Progress 2 Sea Areas
2009-06-18
creation
Minches & Western Scotland
-4.1266
-1.9074
58.5789
59.5948
-5.0495
-3.9234
53.0733
53.5133
2010-07-01
2013-01-31
Data Archive for Seabed Species and Habitats (DASSH)
Data Manager
01752 633102
01752 633291
Marine Biological Association of the UK,
The Laboratory,
Citadel Hill
Plymouth
PL1 2PB
dassh.enquiries@mba.ac.uk
distributor
https://www.dassh.ac.uk/datasets/DASSHDT00000187
A link to the web service or dataset
http://www.dassh.ac.uk
DASSH homepage
A link to the general host site
dataset
Part of MSFD NNS baseline data collation project (Jan 2016). Subset of a dataset as we were only pulling out records for a selection of INNS. Contains records for Schizoporella japonica.
If any sensitive species or biotope records are present within this dataset, they will have been removed. If you wish to request access to sensitive species records, please contact the metadata contact. The UK Sensitive Species list has been agreed by UK statutory bodies and relevant experts. It can be viewed here https://docs.nbnatlas.org/sensitive-species-list/. Please note sensitive species lists can vary across the UK.