Seagrass Meadows, Ireland Case Study
Infographic of the Ireland demonstration site
Case Study Components
Introduction to the site
Map indicating the four restoration sites in Galway Bay (Lettercallow, Connemara), two in Tralee Bay (Fenit Island and Spa), and one in Killala Bay (Killala).
Driving Factors and Motivations
The motivation for restoration lies in the fact that seagrass meadows are among the most valuable coastal ecosystems, providing essential services such as carbon sequestration, biodiversity support, and shoreline stabilization. Restoring these ecosystems is crucial to ensure the long-term health of our oceans and coastal communities.
Causes of decline:
- pollution
- coastal development
- anthropogenic climate change
Assessment Phase
Galway Bay Site
Selected after assessing size, shoot, density, water quality, and sediment stability
Area chosen with no significant pressures
Site environmental conditions similar to donor meadow
Tralee Bay Site
Close proximity to subtidal Zostera marina and intertidal Nanozostera noltei meadows
Strong stakeholder network
Small scale experiments of Nanozostera noltei showed promising results
Killala Bay Site
Favorably conditions for experimental work
Small scale trials showed promising results
Healthy donor meadow located nearby
Sites show minimal anthropogenic pressures, making them suitable for restoration efforts
Planning and Design Phase
Primary Objective: Restoration of degraded or lost seagrass meadows through transplantation
Objective 2
Refine seagrass restoration techniques and protocols to identify most suitable methods
Objective 3
Develop new methods and technologies for seagrass restoration, including earth observation monitoring, molecular studies
Objective 4
Enhance ecosystem services through seagrass restoration, including biodiversity maintenance, carbon sequestration, coastal protection
Objective 5
Involve local communities, policymakers, and stakeholders including education, citizen scientists, and conservation initiatives
Objective 6
Establish a monitoring program to track the success of restoration efforts, assessing seagrass coverage, health, and ecological function
Permits
Irish Department of Housing, Local Government, and Heritage
- Marine scientific permits needed for all three bays
Maritime Area Regulatory Authority (MARA)
- As of July 2023, MARA has taken over all marine consenting functions in Ireland
- The creation of this new agency may create delays in obtaining permits for future restoration and scientific projects
Relevant EU regulations
EU Nature Restoration Law
- Sets legally binding targets for restoration of degraded ecosystems
- Member States are required to restore at least 20% of EU land and sea areas by 2030
Habitats Directive (92/43/EEC)
- Includes Zostera spp.
- Requires strict protection and conservation measures for Natura 2000 sites
Marine Strategy Framework Directive (2008/56/EC)
- Mandates achieving Good Environmental Status (GES) of marine waters
- Seagrass meadows serve as a key indicator of ecological quality
Developing Project Protocols
Steps utilised in the restoration protocol of the Irish demonstration sites
Implementation Phase
Implementation Process
Select site
Based on environmental suitability, with reference sites established at key locations within the study areas
Transplantation into the field
Zostera marina: Healthy shoots weighted and planted in pre-dug sediment plots
Nanozostera noltei: Sediment cores extracted using core sampler, cores relocated to targeted restoration areas
Seeding
Seed dispersed on prepared sediment beds under controlled conditions
Monitoring and Data Collection Process
Ecological elements monitored during the monitoring phase of restoration
Measurement with calibrated tools
- Rulers
- Measuring tapes
- Quadrats
Sediment core extraction
Sampling of filtered and unfiltered water
Ecophysiological assessments
- Visual inspections of plant health
- Collection of leaf tissue for analysis of carbohydrates and nutrients
Timeline for data collection
Figure showing the monitoring timeline of the project
Ongoing Management, Monitoring, and Evaluation Phase
Initial results from the sites
Restoration Challenges
Galway Bay
Efforts disrupted by adverse weather
Typical examples: storms, heavy rainfall, and strong winds
Increased turbidity following storms
Complicates transplant monitoring and sampling
Seasonal Challenges
Winter challenge: Primarily storms Spring challenges: Temperature and seaweed blooms
Tralee Bay
Local activities threaten restoration success
Example: Vehicle traffic over transplanted meadows
Balancing interests of local conservationists
Concern over seed removal for conservation purposes. To mitigate these concerns, the team followed a strict protocol to minimise impact to donor meadows.
Changes in land-derived water flow
Occasionally this would damage transplants
Constraints on restoration
Examples: limited donor meadows due to lack of genetic data, invasive species, streams of fresh water, seaweed blooms and eutrophication, administrative hurdles
Killala Bay
Monitoring equipment lost or removed
Some equipment such as HOBO data loggers and markers have been lost or removed from the site
Constraints on restoration
Examples: limited donor meadows due to lack of genetic data, invasive species, streams of fresh water, seaweed blooms and eutrophication, administrative hurdles
Sharing and Communication
Map of Ireland with locations of stakeholder engagement