Identification

Title

Habitat point records from 1973 University of Bristol Severn estuary littoral survey

Abstract

The pattern of the infauna on particulate shores of the southern coasts of the Severn Estuary has been examined. Although mud predominates as the major beach substratum within the Estuary, sand beaches occur in both the lower and the upper reaches. Liquid mud is found at l.w. in the middle reaches. Suitability of substratum is shown to be the most important factor influencing animal distribution. The number of infaunal species found in this survey did not increase markedly towards the mouth, in contrast to the pattern displayed by rocky shore animals. Several species were rare or absent on mud beaches close to the entrance of the River Avon and the possibility that sewage contamination is responsible for this is discussed. The methods of sampling differed slightly at different transect sites. Normally one quadrat of area 0.25m2 was taken at each station and sieved through a mesh of 0.5mm. When the substratum was very firm mud or clay with a surface coating of softer mud which was less than 10cm deep, this surface layer only was taken, since it was impossible to force the clay through the sieve. Such samples were supplemented with 10cm deep cores of area 0.01m2. No distinction was made in the reprint of which stations had which method of sampling on them so both methods have been recorded at each station.

Resource type

dataset

Resource locator

http://data.jncc.gov.uk/data/8b2f1ebe-15de-42a7-a8ea-4ab977c86a5d-1973-University-of-Bristol-Severn-estuary-littoral-survey.csv

name: 1973-University-of-Bristol-Severn-estuary-littoral-survey.csv

Unique resource identifier

code

8b2f1ebe-15de-42a7-a8ea-4ab977c86a5d

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

Boyden, Little (1973) Faunal distibutions in soft sediments of the Severn estuary. Boyden, Little (1973) Faunal distibutions in soft sediments of the Severn estuary.

Classification of spatial data and services

Topic category

oceans

Keywords

Keyword set

keyword value

Marine

Marine Recorder

JNCCMNCR10000495

Habitat

MNCR

Geographic location

West bounding longitude

-3.450276104

East bounding longitude

-2.349424591

North bounding latitude

51.7980328

South bounding latitude

51.16823983

Temporal reference

Temporal extent

Begin position

1972-07-24

End position

1972-10-14

Dataset reference date

date type

publication

effective date

2001-08-21

Frequency of update

Quality and validity

Lineage

This survey was extracted from a Marine Recorder snapshot.

Conformity

Data format

name of format

Comma Separated Values

version of format

Unknown

Constraints related to access and use

Constraint set

Use constraints

Open Government Licence v3.0

Limitations on public access

no limitations

Responsible organisations

Responsible party

organisation name

Digital and Data Solutions, JNCC

email address

data@jncc.gov.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

organisation name

Digital and Data Solutions, JNCC

email address

data@jncc.gov.uk

responsible party role

pointOfContact

Metadata date

2018-05-17

Metadata language

eng