Identification

Title

1991 Alconbury Environmental Consultants, The Fleet, Dorset, quadrat survey of Zostera and Ruppia

Abstract

Survey run by N.T.H. Holmes for English Nature (Peterborough). All these records relate to "Holmes (1991) The Distribution of Zostera and Ruppia in the Fleet 1991". A copy of the report is held at English Nature (Dorset Team). This is the third of three surveys by the author which aim to determine the abundance and distribution of two Zostera species (Z. nolti and Z. angustifolia) and two Ruppia species (R. cirrhosa and R. maritima) in the Fleet, Dorset. Fieldwork was carried out on August 9th and 10th 1991. Results are compared with two previous surveys by the author in 1983 and 1985. At each site a quadrat of approximately 100 square metres was surveyed and the percentage cover of the individual plant species estimated. For the purpose of this survey, cover from non-attached algae was considered separately from that which was rooted; therefore a total cover of more than 100% was possible if algae were deposited on top of eel-grass. In total 151 quadrats were surveyed. The author notes that it is impossible to be precise about where each of the quadrats were located, but the report provides a detailed map comparing the sites surveyed in the three different survey years. A grid reference has therefore been allocated to each quadrat using the map from the report. The report confirms the west-east and north-south zonation of species reported from previous surveys. Ruppia cirrhosa is very dominant west of Rodden Hive Point but then gives way gradually to Zostera on passing east down the Fleet; Z. noltii thrives best along the northern coves whilst Z. angustifolia dominates along the shore in the shadow of Chesil and in the main body of the Fleet.

Resource type

dataset

Resource locator

Unique resource identifier

code

MRLRC00100000546

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::27700

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2008-01-06

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2003-01-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2011-07-06

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2009-11-16

Geographic location

West bounding longitude

-2.6102

East bounding longitude

-2.4683

North bounding latitude

50.6569

South bounding latitude

50.5762

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

2009-06-18

code identifying the extent

Eastern Channel

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

29E7

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

30E7

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

29E8

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

30E8

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

29E9

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

30E9

Extent group

authority code

title

reference date

date type

creation

effective date

1954-01-01

code identifying the extent

English Channel

Extent group

authority code

title

reference date

date type

revision

effective date

2010-01-01

code identifying the extent

benthic boundary layer

Extent group

authority code

title

reference date

date type

revision

effective date

2010-01-01

code identifying the extent

infralittoral

Extent group

authority code

title

reference date

date type

revision

effective date

2010-01-01

code identifying the extent

water column boundary layer

Temporal reference

Temporal extent

Begin position

1991-08-09

End position

1991-08-10

Dataset reference date

date type

publication

effective date

2013-02-14

Frequency of update

notPlanned

Quality and validity

Lineage

Survey run by NTH Holmes of Alconbury Environmental Consultants on behalf of English Nature (Peterborough). All these records realte to "Holmes (1991) The Distribution of Zostera and Ruppia in the Fleet 1991". A copy of the report is held at English Nature (Dorset Team). This is the third of three surveys by the author which aim to determine the abundance and distribution of two Zostera species (Z. nolti and Z. angustifolia) and two Ruppia species (R. cirrhosa and R. maritima) in the Fleet, Dorset. Fieldwork was carried out on August 9th and 10th 1991. Results are compared with two previous surveys by the author in 1983 and 1985. At each site a quadrat of approximately 100 square metres was surveyed and the percentage cover of the individual plant species estimated. For the purpose of this survey, cover from non-attached algae was considered separately from that which was rooted; therefore a total cover of more than 100% was possible if algae were deposited on top of eel-grass. In total 151 quadrats were surveyed. The author notes that it is impossible to be precise about where each of the quadrats were located, but the report provides a detailed map comparing the sites surveyed in the three different survey years. A grid reference has therefore been allocated to each quadrat using the map from the report. The report confirms the west-east and north-south zonation of species reported from previous surveys. Ruppia cirrhosa is very dominant west of Rodden Hive Point but then gives way gradually to Zostera on passing east down the Fleet; Z. noltii thrives best along the northern coves whilst Z. angustifolia dominates along the shore in the shadow of Chesil and in the main body of the Fleet.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Data is freely available for research or commercial use providing that the originators are acknowledged in any publications produced.

Constraint set

Limitations on public access

No restrictions to public access

Responsible organisations

Responsible party

organisation name

Alconbury Environmental Consultants

email address

dassh.enquiries@mba.ac.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Natural England

full postal address

Northminster House

Peterborough

PE1 1UA

telephone number

+44 (0)845 600 3078

facsimile number

+44 (0)1733 455103

email address

enquiries@naturalengland.org.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Marine Survey and Data Officer

organisation name

Dorset Wildlife Trust

email address

CBolton@dorsetwildlifetrust.org.uk

responsible party role

pointOfContact

Metadata date

2016-11-15

Metadata language