Sinclair, F.H.; Stone, G.; Cavers, S.; Schönrogge, K.

Cynipid abundance at Petite Charnie, France, in 2008 and 2009

This dataset contains Cynipid gall abundance from an oak provenance trial at Petite Charnie in France. 2400 trees were sampled from 20 provenances of Quercus petraea and Quercus robur in 2008 and 2009. Cynipids have two gall generations each year so trees were sampled in spring (sexual generation) and autumn (asexual generation). 10 twigs were surveyed for galls on all parts of the terminal shoot (buds, leaves, stem, catkins) from each tree in spring and autumn. Counts were made for each species and generation.

Publication date: 2015-08-21

Get the data

This dataset is made available under the terms of the Open Government Licence

Format of the dataset : Comma-separated values (CSV)

You must cite: Sinclair, F.H.; Stone, G.; Cavers, S.; Schönrogge, K. (2015). Cynipid abundance at Petite Charnie, France, in 2008 and 2009. NERC Environmental Information Data Centre.


© Centre for Ecology & Hydrology (Natural Environment Research Council)


Study area
Temporal extent
2008-05-15    to    2009-10-09

Provenance & quality

Samples were taken from an established provenance trial. Provenances are represented by two or three distinct plots (parcelles), each a replicate set of 24 trees planted in four columns of six trees, with spacing of 1.75 meters between trees within columns and three meters between columns. Plots of 8 different randomly selected provenances are aggregated into blocks, with the position of blocks randomised within soil zones. Samples were taken from a subset of provenances from trees in the internal rows of the blocks to minimise edge effects. Cynipid gall abundance was sampled using a standardised sampling protocol. 10 twigs on each tree, each consisting of the last two years' growth, were removed and for each twig the galls on all parts (buds, leaves, stem, catkins) of its terminal shoot (a module of woody growth from the previous year carrying the new leaves) were counted. Galls were identified to species and generation in the field using a morphological key and extensive field experience of the surveyors. After data collation and transcribing into electronic format, unusual values were checked.

Correspondence/contact details

Dr. Karsten Schönrogge
Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
OX10 8BB
United Kingdom


Sinclair, F.H.
Centre for Ecology & Hydrology
Stone, G.
Edinburgh University
Cavers, S.
Centre for Ecology & Hydrology
Schönrogge, K.
Centre for Ecology & Hydrology

Other contacts

Environmental Information Data Centre
NERC Environmental Information Data Centre


Spatial representation type
Tabular (text)
Spatial reference system
WGS 84


Topic categories
Andricus foecundatrix Andricus glandulae Andricus solitarius Andricus testaceipes asexual generation,  Cynipids,  Cynips divisa Cynips quercusfolii gallwasps,  La Petite Charnie Neuroterus albipes Neuroterus anthracinus Neuroterus numismalis Neuroterus quercusbaccarum oak,  provenance trial,  Quercus petraea Quercus robus sexual generation
Environmental Monitoring Facilities