Submerged aquatic vegetation (SAV) forms an integral component of ecologically healthy aquatic systems. Besides providing a thriving habitat for underwater fauna, it also regulates the water flow, stabilises sediment, and improves biogeochemical cycling. However, they have been subject to different kinds of pressures ranging from grazing by invasive species, increased flow velocities, and rising temperatures leading to observable changes in their canopy structure and composition. Only fewer studies have looked into the possibility of mapping stress in SAV, mainly due to the difficulty of applying optical remote sensing techniques in submerged environments resulting from the strong attenuation of visible and particularly infrared light in water. In this project the main aim is to identify stress in SAV from multispectral imagery. To achieve this a highly detailed model of a submerged plant canopy was obtained using Structure from Motion photogrammetry (SfM).
These preliminary results show that it is possible to detect variation in spectral reflectance of SAV as a result of stress when above water radiation is corrected for submergence depth based on a 3D canopy model obtained through SfM.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.