Identification

Title

Records of leaf damage caused by and parasitism of Cameraria ohridella in Britain in 2010 collected with a citizen science approach, plus validation of the data

Abstract

Records of leaf damage caused by and parasitism of Cameraria ohridella in Britain in 2010 collected with a citizen science approach as part of the Conker Tree Science citizen science project, plus validation of the data. Over 3500 people in Great Britain provided data at a national scale on an invasive insect (horse-chestnut leaf-mining moth, Cameraria ohridella Deschka & Dimic; Lepidoptera: Gracillariidae) in order to address two hypotheses. Specifically: (1) whether the levels of damage caused to leaves of the horse-chestnut tree, Aesculus hippocastanum L., and (2) whether the level of parasitism of C. ohridella larvae were both greatest where C. ohridella had been present the longest Participants recorded leaf damage on an ordinal scale (0-4) during the summer (1st July to 15th October 2010). In order to assess the levels of parasitism of caterpillars of C. orhidella, we invited people to rear insects from horse chestnut leaves infested with C. ohridella. Participants sampled leaves during the first week of July 2010 (i.e. the first of the moth's gererations that year) and stored them in sealed plastic bags for two weeks. We then asked participants to report the number of leaf-mines, and to identify and count the insects in each category: adult C. ohridella moths, parasitoids, and other insects. Anyone could take part in rearing parasitoids, but we particularly focused on school children aged 8-11 by working with a team of eight trained volunteers across the country who directly contacted schools and led lessons in classes. The volunteers did not provide directive guidance during the time that the children were counting adult moths and parasitoids, so the data were not biased by our supervision. At the completion of the activity, we retained a randomly-selected subset of 669 samples that the children had counted. We also retained an additional 75 samples in which children had reported parasitoids. For all of these samples an expert blindly assessed the counts of leaf mines, adult C. ohridella moths and other insects. In order to assess how many years that C. orhidella had been present in a location, we used a long-term dataset collated by Forest Research (used with permission). These data showed under-sampling of the range of C. orhidella after 2006, so we also modeled the predicted arrival of C. orhidella based on a demographic model of spread parameterised in continental Europe by augementing the known distribution with a model of short-distance spread by the model. We ran the model twice, assuming two and three generations of C. ohridella, respectively. The project was supported by the Natural Environment Research Council and undertaken at the University of Bristol, UK. Full details about this dataset can be found at https://doi.org/10.5285/9f913f10-6e3d-449e-b8af-8fa2d06d7fd3

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/sd/9f913f10-6e3d-449e-b8af-8fa2d06d7fd3.zip

name: Supporting information

description: Supporting information available to assist in re-use of this dataset.

function: information

https://data-package.ceh.ac.uk/data/9f913f10-6e3d-449e-b8af-8fa2d06d7fd3

name: Download the data

description: Download a copy of this data

function: download

Unique resource identifier

code

1380639961814

codeSpace

CEH:EIDC:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Species Distribution

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

Wikidata

reference date

date type

creation

effective date

2012-10-29

Keyword set

keyword value

Horse-chestnut leaf miner

conker tree

Geographic location

West bounding longitude

-8.648

East bounding longitude

1.768

North bounding latitude

60.861

South bounding latitude

49.864

Temporal reference

Temporal extent

Begin position

2010-07-01

End position

2010-10-15

Dataset reference date

date type

publication

effective date

2013-10-04

Frequency of update

notPlanned

Quality and validity

Lineage

Data are the counts submitted to the Conker Tree Science project website by participating members of the public with no correction or validation. Counts in the file 'parasitoidrecordsComma Separated Values' are binned, so counts up to 25 (inclusive) represent acutal number reported, but for higher counts people selected from the following options: 26-30, 31-40, 41-50, 51-60 and 'too many to count', which have been converted to the following counts: 28, 35, 45, 55 and 65. A set of these samples was retained for verification of the count data, which is presented in the 'validationdataComma Separated Values' file. Full location data was provided by the participants, but for privacy reasons, we have only provided location to the 10km square, based on the Ordnance Survey UK grid. The observed year of arrival at a given 10km square was obtained from the Forest Research website (http://www.forestry.gov.uk/fr/infd-68jjrc) and used with permission. These records were used to model the expected distribution.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Comma-separated values (CSV)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

© UK Centre for Ecology & Hydrology

Constraint set

Limitations on public access

If you reuse this data, you should cite: Pocock, M.J.O., Evans, D.M. (2013). Records of leaf damage caused by and parasitism of Cameraria ohridella in Britain in 2010 collected with a citizen science approach, plus validation of the data. NERC Environmental Information Data Centre https://doi.org/10.5285/9f913f10-6e3d-449e-b8af-8fa2d06d7fd3

Responsible organisations

Responsible party

organisation name

UK Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

pointOfContact

Responsible party

organisation name

Centre for Ecology & Hydrology - Pywell Section

email address

enquiries@ceh.ac.uk

responsible party role

resourceProvider

Responsible party

organisation name

Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

University of Hull

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

Environmental Information Data Centre

email address

info@eidc.ac.uk

responsible party role

custodian

Responsible party

organisation name

NERC Environmental Information Data Centre

email address

info@eidc.ac.uk

responsible party role

publisher

Responsible party

organisation name

UK Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

UK

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2020-09-22T11:35:01

Metadata language

eng