Long-stalked Pondweed (Potamogeton praelongus)
Key Details
| Taxonomic Groups: | Vascular plant > flowering plant > Aquatic plant |
| Red List Status: | Near Threatened (Not Relevant) [NT(nr)] |
| D5 Status: | Included in the baseline Red List Index for England (Wilkins, Wilson & Brown, 2022) |
| Section 41 Status: | (not listed) |
| Taxa Included Synonym: | (none) |
| UKSI Recommended Name: | Potamogeton praelongus |
| UKSI Recommended Authority: | Wulfen |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | in Stroh et al., 2014 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | Assessed as EN in England by Stroh et al. (2014) due to a 69% decline in AOO, with the likely cause of decline linked to eutrophication. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | A decline in water quality is the most likely cause for the ongoing decline of this species. |
| Question 3: | At a landscape scale, would the species benefit from untargeted habitat management to increase habitat mosaics, structural diversity, or particular successional stages? |
| Response: | Yes |
| Justification: | Untargeted measures would likely not lead to the recovery of this species at a landscape scale. A decline in water quality combined with an increased use in boat traffic along canals is the most likely cause for the ongoing decline of this species, and so specific actions are required, albeit improvements to water quality e.g. from run-off could be made by untargeted actions moving away from intensive farming in important catchments. |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 4. Autecology and pressures understood |
| Recovery potential/expectation: | Medium-high |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: |
Key Actions
Key Action 1
Proposed Action: Prepare an ecological profile to inform future conservation actions.
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 1 year
Scale of Implementation: Unknown
High priority sites: This action involves a thorough ecological profile of the species, and so no specific site actions are required here
Comments: Action 2+3 could be actions guided by findings from action 1, but at this time these are unknown.
Acknowledgment:
Data used on this website are adapted from Threatened species recovery actions 2025 baseline (JP065): Technical report and spreadsheet user guide (Natural England, 2025). Available here.