Combining unmanned aerial vehicles and satellite imagery to quantify areal extent of intertidal brown canopy‐forming macroalgae

Lewis, Pippa H.; Roberts, Benjamin Philip; Moore, Pippa J.; Pike, Samuel; Scarth, Anthony; Medcalf, Katie; Cameron, Iain

doi:10.1002/rse2.327

Cited by 6 publications

(4 citation statements)

References 53 publications

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“…Estimates indicate that kelp beds encompass a global area ranging from 1 to 5 million square kilometers and are distributed along approximately 25% of the world's coastlines (Wernberg et al, 2019). However, accurately estimating subtidal algal beds using satellite imagery remains challenging (Lewis et al, 2023).…”

Section: Wild Seaweeds: Potential and Challenges In Carbon Sequestrationmentioning

confidence: 99%

Diverse Roles of Seaweed in the Blue Carbon Economy and Sustainable Development: A Comprehensive Review

Saravanan,

Chatterjee,

Bhowmick

2023

GLCE

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The imperative to replace fossil fuels with renewable fuels, such as marine ecosystem-derived fuel and food, has spurred the development of a blue carbon economic model. Seaweed emerges as a pivotal element in this framework, demonstrating potential as a substantial carbon sink. Seaweed serves multiple purposes, encompassing climate change adaptation and mitigation and contributing to advancing a bioeconomy by reducing dependence on fossil fuels. Seaweed also holds promise as a source of human food, cattle feed, biofuels, renewable feedstocks, and other versatile applications. Numerous contemporary scientific publications, reputable organizations, and business resources offer illuminating insights and fresh perspectives on how seaweed can effectively contribute to the growing blue carbon economy, providing innovative tools for combating long-term climate change. This comprehensive review delves into the multifaceted potential of seaweed, concentrating on its contributions to carbon sequestration, its role as a blue carbon precursor, and the carbon-neutralization capabilities of both wild seaweeds and seaweed farming. Moreover, it explores the specific role of seaweed in the blue carbon economy, mainly as cattle feed in ruminant diets. In addition, seaweed cultivation has the potential to mitigate global climate change, promote economic development, and support sustainable livelihoods, offering a versatile solution to address pressing environmental and socioeconomic challenges.

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Section: Wild Seaweeds: Potential and Challenges In Carbon Sequestrationmentioning

confidence: 99%

Diverse Roles of Seaweed in the Blue Carbon Economy and Sustainable Development: A Comprehensive Review

Saravanan,

Chatterjee,

Bhowmick

2023

GLCE

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“…Mapping of the distribution of A. nodosum was a fundamental rst step in resource management. Resource mapping resolution has improved with the application of new methods of remote sensing (Lewis et al 2023).…”

Section: Declarations Fundingmentioning

confidence: 99%

Ascophyllum nodosum Le Jolis Harvesting Impacts and Management Options Using GPS Tracking of Mechanical Harvesters in Nova Scotia, Canada

Sharp¹,

Sharp²

2023

Preprint

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Area based management of Ascophyllum nodosum Le Joli in the Canadian Maritimes has advanced over the past 60 years from open buying stations in Bays to quota-based area management under coastal leases. In 1989 the resource was divided into geographical sectors containing .9 to 17.6 ha containing 92 t to 2105 t of harvestable biomass. Sectors are the units of management plans under guidelines of the provincial government. GPS tracking mechanical harvesting to Nova Scotia began in 2017 using a new mechanical harvester in a pilot harvest. GPS tracking allowed the calculation of yield with the time, distance, and cutting swath. Harvests were conducted within target bed polygons of 200 m− 2 to 1280 m− 2. Production per hour averaged 1135 ± 169 kg h− 1 yielding 5.96 ± 1.01 kg m− 2 of swept track. The average exploitation rate within targeted polygons was 33.1 ± 14.5%. This level of geographic resolution of the harvest permits significant improvements in management practices, control of management plans, pre and post assessments of the resource. It is a method of addressing landscape scale questions relating to harvesting impacts.

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“…Overall, evaluating the biomass of seaweed in a narrow intertidal zone using satellite remote sensing technology is a highly important and challenging task, with limited prior research being available in the literature [17,36,37]. Directly inferring the seaweed biomass in this study area through combining sampling data with satellite imagery resulted in significant errors.…”

Section: Introductionmentioning

confidence: 99%

Satellite Imagery-Estimated Intertidal Seaweed Biomass Using UAV as an Intermediary

Chen,

Wang,

Zhao

et al. 2023

Remote Sensing

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The aim of this study was to use unmanned aerial vehicles (UAVs) as a supplement to satellite remote sensing to accurately assess benthic seaweed biomass in intertidal zones, in order to improve inversion accuracy results and investigate the spatial distribution patterns of seaweed. By adopting non-multicollinearity vegetation indices (feature sets) from PlanetScope and Sentinel-2, and using benthic seaweed biomass inverted from multispectral UAV imagery as the label set for satellite pixel biomass values, machine learning methods (Gradient boosting decision tree, GBDT) can effectively improve the accuracy of biomass estimation results for Ulva pertusa and Sargassum thunbergii species (Ulva pertusa, RSentinel22 = 0.74, RPlanetScope2 = 0.8; Sargassum thunbergii, RSentinel22 = 0.88, RPlanetScope2 = 0.69). The average biomasses of Ulva pertusa and Sargassum thunbergii in the intertidal zone of Gouqi Island are 456.84 g/m2 and 2606.60 g/m2, respectively, and the total resources are 3.5 × 108 g and 1.4 × 109 g, respectively. In addition, based on the hyperspectral data, it was revealed that a major source of error is the patchy distribution of seaweed.

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Combining unmanned aerial vehicles and satellite imagery to quantify areal extent of intertidal brown canopy‐forming macroalgae

Abstract: Combining unmanned aerial vehicles and satellite imagery to quantify areal extent of intertidal brown canopy-forming macroalgae. Remote Sensing in Ecology and Conservation.

Cited by 6 publications

References 53 publications

Diverse Roles of Seaweed in the Blue Carbon Economy and Sustainable Development: A Comprehensive Review

Diverse Roles of Seaweed in the Blue Carbon Economy and Sustainable Development: A Comprehensive Review

Ascophyllum nodosum Le Jolis Harvesting Impacts and Management Options Using GPS Tracking of Mechanical Harvesters in Nova Scotia, Canada

Satellite Imagery-Estimated Intertidal Seaweed Biomass Using UAV as an Intermediary

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