Toward coherent space-time mapping of seagrass cover from satellite data: example of a Mediterranean lagoon DOI Creative Commons
Guillaume Goodwin, Marco Marani, Sonia Silvestri

et al.

Published: Jan. 24, 2023

Abstract. Seagrass meadows are a highly productive and economically important shallow coastal habitat. Their sensitivity to natural anthropogenic disturbances, combined with their importance for local biodiversity, carbon stocks sediment dynamics, motivate frequent monitoring of distribution. However, generating time-series seagrass cover from field observations is costly, mapping methods based on remote sensing require restrictive conditions seabed visibility, limiting the frequency observations. In this contribution, we examine effect accounting environmental factors such as bathymetry median grain size (D50) substrate, well coordinates known patches, performance Random Forest (RF) classifier used determine cover. Using 148 Landsat images Venice Lagoon (Italy) between 1999 2020, trained RF only spectral features surveys, respectively 2002 2017. Then, by adding above applying time-based correction predictions, created multiple models different feature combinations. We tested quality resulting predictions each model against showing that bathymetry, D50 patches exert an influence dependant training image survey chosen. 2017, where using causes overestimate surface area, no significant change in was observed. Conversely, 2002, addition out-of-image particularly vegetated greatly improves predictive capacity model, while still allowing detection beds absent reference survey. Applying eliminates small temporal variations improving performed before correction. conclude together correction, has most potential produce reliable While case study alone insufficient explain how geographic location information influences classification process, suggest it linked inherent spatial auto-correlation meadow interest develop our map vegetation across time, identify phenomenon warranting further research.

Language: Английский

Shellfish-algal systems as important components of fisheries carbon sinks: Their contribution and response to climate change DOI

Ruolan Jia,

Ping Li,

Chengzhuang Chen

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 224, P. 115511 - 115511

Published: Feb. 15, 2023

Language: Английский

Citations

24
A comprehensive review of the effects of salinity, dissolved organic carbon, pH, and temperature on copper biotoxicity: Implications for setting the copper marine water quality criteria DOI
Liang Cui, Xiaoguang Li, Yan Luo

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169587 - 169587

Published: Dec. 26, 2023

Language: Английский

Citations

14
Easy-to-Use Sensors for Field Monitoring of Copper Contamination in Water and Pesticide-Sprayed Plants DOI

Kevin A. Kirk,

Silvana Andreescu

Analytical Chemistry, Journal Year: 2019, Volume and Issue: 91(21), P. 13892 - 13899

Published: Sept. 27, 2019

Copper (Cu2+)-containing pesticides are commonly used in agriculture to control fungal and bacterial diseases, but the release of large quantities Cu2+ water soil can lead harmful long-term consequences on environment, organisms, ecosystem health. Technology available measure accumulation field is too expensive complicated for general population use. We describe a low-cost sensor with simplified user operation measuring content environmental agricultural samples at sensitivity levels comparable laboratory-based atomic absorption spectroscopy (AAS) method. The based polyethyeleneimine (PEI), which has strong chelating ability ions. PEI stabilized paper by layer-by-layer assembly deposited sequentially within electrostatically charged poly(styrenesulfonate) (PSS). PEI-PSS layers develop vivid blue complex when interacting Cu2+, resulting color intensity varies concentration. Our sensors give yes or no response naked eye down 10 μM preconcentration step was used. A more precise quantitative be obtained using smartphone scanner free imaging software wide linear range from 2000 detection limit 0.795 μM. were detecting commercial Cu2+-based pesticide-sprayed plants 15 min. Considering that these robust, simple operate, extremely stable, they could ideal remote monitoring ion exposure analysis fields.

Language: Английский

Citations

39
Regional and local variability in the morphometric traits of two emblematic seagrass species (Zostera marina and Zostera noltei) along the French coast DOI Creative Commons
Élise Lacoste, Aurélien Boyé,

Aline Blanchet-Aurigny

et al.

Peer Community Journal, Journal Year: 2025, Volume and Issue: 5

Published: Feb. 27, 2025

Language: Английский

Citations

0
Excess copper promotes photoinhibition and modulates the expression of antioxidant-related genes in Zostera muelleri DOI
Pimchanok Buapet,

Nasim Shah Mohammadi,

Mathieu Pernice

et al.

Aquatic Toxicology, Journal Year: 2018, Volume and Issue: 207, P. 91 - 100

Published: Dec. 5, 2018

Language: Английский

Citations

31
Seagrasses benefit from mild anthropogenic nutrient additions DOI Creative Commons
Vasco M. N. C. S. Vieira, Jorge Lobo, Rafael Santos

et al.

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: Nov. 23, 2022

Seagrasses are declining globally, in large part due to increased anthropogenic coastal nutrient loads that enhance smothering by macroalgae, attenuate light, and toxic when excessive concentrations of inorganic nitrogen phosphorus. However, as sanitation is improved many seagrass meadows have been observed recover, with a few studies suggesting they may even benefit from mild additions. Monitoring demography health has faced difficulties establishing the adequate variables metrics. Such uncertainty methods caused significance results presented compromised extrapolations other seasons, areas, or species. One solution come within plant self-thinning theories. During 1980s, an interspecific boundary line (IBL) was determined upper limit combination density above-ground biomass for any stand on Earth, setting their maximum possible efficiency space occupation. Recently, two meta-analyses determine specific IBLs algae seagrasses performed. The recently updated dataset comprises 5,052 observations 78 18 These opened new perspectives monitoring: distance respective IBL (i.e., each stand’s relative occupation) demonstrated be valuable indicator population’s health. Thus, this metric can used impact nutrients pollutants populations. Furthermore, because common all species, compare species location worldwide. This novel approach showed Halodule wrightii , beaudettei Halophila baillonii Zostera marina noltei additions phosphorus, long these moderate. In fact, healthier Z. Portugal (and among healthiest worldwide) were ones exposed effluents wastewater treatment plants (WWTP) food factory. We conclude those providing water enough quality optimal management should coordinate technological solutions WWTP natural potential purifiers producers.

Language: Английский

Citations

15
Dynamics of the seagrass Zostera noltei in a shallow Mediterranean lagoon exposed to chemical contamination and other stressors DOI Creative Commons

Diane Espel,

Noël J. Diepens, Olivier Boutron

et al.

Estuarine Coastal and Shelf Science, Journal Year: 2019, Volume and Issue: 222, P. 1 - 12

Published: March 28, 2019

Language: Английский

Citations

23
Role of suspended particulate material on growth and metal bioaccumulation in oysters (Crassostrea gigas) from a French coastal semi-enclosed production area, Arcachon Bay DOI Creative Commons
Tiphaine Chouvelon, Isabelle Auby,

Line Mornet

et al.

Journal of Marine Systems, Journal Year: 2022, Volume and Issue: 234, P. 103778 - 103778

Published: June 30, 2022

Language: Английский

Citations

13
Seagrass space occupation efficiency is key for their role as ecosystem engineers and ecological indicators DOI Creative Commons
Vasco M. N. C. S. Vieira, Rafael Santos,

David Leitão-Silva

et al.

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Oct. 15, 2024

Studies for the preservation of seagrass beds biotopes have met difficulties in establishing appropriate methods assessing their health. We tested efficiency space occupation by seagrasses scattered worldwide (dgrass index), which proved to be dependent on clonal growth form and morphometric plasticity. dgrass correlated with above-ground below-ground biomass ratio. However, latter was misleading when high ratios resulted from low biomass. Nutrient Posphate-limitations were revealed situations theoretical Nitrogen-limitation. Enhanced nutrient supply benefitted only up a threshold after it became detrimental. Better nurtured, healthier meadows denser canopies increased organic matter sediment had associated greater abundances benthic macrofauna. Hence, could benefit moderate anthropogenic additions. above ≈6% and/or reduced riverine discharges (dams upstream climate-change-related droughts) detrimental healthy meadows, jeopardizing ecosystem services such as macrofauna carbon sinks. Seagrass good health increase shoot density, leading efficiencies, abundances, sinks, according analysis spatial occupation.

Language: Английский

Citations

2
Environmental factors controlling biomass development of seagrass meadows of Zostera noltei after a drastic decline (Arcachon Bay, France) DOI

Mathis Cognat,

Florian Ganthy, Isabelle Auby

et al.

Journal of Sea Research, Journal Year: 2018, Volume and Issue: 140, P. 87 - 104

Published: July 23, 2018

Language: Английский

Citations

19