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Bridging the Gap between Quadrats and Satellites [Drone the SWMP]: Assessing Utility of Drone-based Imagery to Enhance Emergent Vegetation Biomonitoring

Bridging the Gap between Quadrats and Satellites [Drone the SWMP]: Assessing Utility of Drone-based Imagery to Enhance Emergent Vegetation Biomonitoring

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Researchers developed standardized drone protocol for tidal monitoring, filling the gap between ground-based measurements and satellite observations to improve wetland monitoring programs.

The project

Tidal wetland monitoring is critical for managing these vulnerable coastal ecosystems. Monitoring programs typically combine small scale, ground-based measurements with large scale, satellite observations, though this approach can miss important processes at intermediate scales or from discrete events such as storms. Unmanned Aerial Systems (UAS), known as drones, offer opportunities to radically improve monitoring programs by providing high spatial resolution, coverage, and customization. While many reserves have experimented with drones, the lack of standardized protocol posed a barrier to implementing on a broader scale. This project developed the first regional, drone-based tidal wetland monitoring protocol for the reserve system to complement existing long-term biotic monitoring and habitat mapping.

This catalyst project brought together the six National Estuarine Research Reserves in the Southeast and Caribbean to develop and refine protocols for drone-based data acquisition, data processing, and data analysis. Using ground-based validation, the project assessed the efficacy of drone-collected imagery for estimating common parameters (such as percent cover), delineating boundaries and ecotones between habitats, generating digital elevation models at intermediate scales, and estimating vegetation biomass. This project advanced the adoption of drone-based monitoring across the reserve system by addressing barriers to implementation, developing actionable next steps, and proactively sharing findings with reserves and their partners.

The impact

  • To meet the need of monitoring program staff for large-scale data archiving, sharing, and reproducibility, the team created standardized operational protocol and methodology for data collection and analysis (Link)
  • The team piloted and incorporated drone-based operations into routine monitoring at Southeast and Caribbean reserves and created image processing and analysis protocols from their work.
  • The technical capacity of all team members, including reserve staff, to conduct UAS-based wetland monitoring was enhanced through the development, implementation, and collaborative refinement of the image acquisition, processing, and analysis protocols.
  • The protocol document will serve as a resource for continued enhancement of technical capacity for additional staff at the NERRs on the project team, to NERRs beyond those on the project, and for scientists and managers outside of the NERRS (anticipated).
  • The first-of-its-kind regional research collaboration among the six reserves in the Southeast and Caribbean regions has led to additional coordination and participation in another Science Collaborative funded project (Storm Stories) as well as the development of key regional management needs for the NERRS Science Collaborative Collaborative Research RFP, resulting in the funding for the project Collaborative Development of Novel Remote Sensing Workflows for Assessing Oyster Reef Condition to Inform Management and Restoration. It also provided the necessary tools and processing methodologies for the project Adapting salt marsh vulnerability assessment methodologies to southeastern salt marshes