The contributions that each terrestrial ECN site makes to other UK and international observation and research initiatives are listed below. These contributions are made through a mix of standard ECN monitoring and additional monitoring or research located close to where ECN measurements are made. Much of the monitoring made in addition to ECN standard observations is carried out by ECN Site Managers.
Co-located and connected activities

Site codes & main habitats
Lowland grassland / agricultural sites: HIL = Hillsborough; NOR = North Wyke; POR = Porton; ROT = Rothamsted; WYT = Wytham
Wooded: ALI = Alice Holt; CAI = Cairngorm; ROT = Rothamsted; WYT = Wytham
Upland moor / pasture: CAI = Cairngorm; GLE = Glensaugh; SOU = Sourhope; MOO = Moor House; SNO = Snowdon
Butterfly Monitoring Scheme
11 sites: ALI - CAI - GLE - HIL - MOO - NOR - POR - ROT1 - SNO - SOU - WYT
LTER-Europe & eLTER2
11 sites: ALI - CAI - GLE - HIL - MOO - NOR - POR - ROT - SNO - SOU - WYT
UKEAP National Ammonia Monitoring Network
10 sites: ALI - CAI - GLE - MOO - NOR - POR - ROT - SNO - SOU - WYT
Rothamsted Light Trap Network
9 sites: ALI - CAI - GLE - MOO - NOR - POR - ROT - SOU - WYT
COSMOS-UK soil moisture network
8 sites: ALI - GLE - MOO - NOR - POR - ROT - SOU - WYT
UKEAP Precip-Net
6 sites: CAI - GLE - HIL - MOO - ROT - SNO
UKEAP Rural NO2 network
6 sites: CAI - GLE - HIL - MOO - ROT - SNO
Hull University Pollen trap network
5 sites: ALI - MOO - NOR - ROT - SNO
UKEAP Acid Gases & Aerosol Network
4 sites: GLE - HIL - MOO - ROT
ECT Long-Term Experiment located at same site
4 sites: HIL - MOO - NOR - ROT- WYT (x2)
Met Office Rainfall Network
2 sites: GLE - MOO
UK Upland Waters Monitoring Network via the co-located stream sites indicated
2 sites: CAI (Allt a'Mharcaidh) - MOO (Trout Beck)
ICP Forests
1 site: ALI
Global Observation Research Initiative in Alpine Environments, (GLORIA)
1 site: CAI
Radioactive Incident Monitoring Network (RIMNET)
1 site: ROT
INTERACT (Arctic, sub-Arctic and alpine research stations)
1 site: CAI
1Ceased in 2010
2Through LTER-Europe, ECN also contributes to research and data synthesis activities of the International Long-Term Ecological Research Network, ILTER