Where does marine litter hide? The Providencia and Santa Catalina Island problem, SEAFLOWER Reserve (Colombia)

Portz, Luana; Manzolli, Rogério Portantiolo; Villate-Daza, D. A.; Fontán-Bouzas, Ángela

doi:10.1016/j.scitotenv.2021.151878

“…Among these, it was recently shown that UAV constitute a valid alternative to traditional litter pollution surveys in the marine environment, being feasible for detecting and mapping litter stranded on beaches [22][23][24][25][26][27][28][29][30] and dunes [31,32], as well as litter floating on sea [15,33,34] and river [35] waters. Regarding beached litter (BL) on the coast, drone-based surveys are advantageous in comparison with the conventional spatially limited visual census [36,37], since UAV require much less human effort in the field, and can provide deeper insights into litter dynamics [24,26]. Yet, it was shown that the integration of drone flights with traditional methods for floating litter (FL) surveys, such as visual observations from boats and manta trawls, can improve the description of FL abundance and paths.…”

Section: Introductionmentioning

confidence: 99%

Beached and Floating Litter Surveys by Unmanned Aerial Vehicles: Operational Analogies and Differences

Andriolo

¹

,

Garcia-Garin

²

,

Vighi

³

et al. 2022

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The abundance of litter pollution in the marine environment has been increasing globally. Remote sensing techniques are valuable tools to advance knowledge on litter abundance, distribution and dynamics. Images collected by Unmanned Aerial Vehicles (UAV, aka drones) are highly efficient to map and monitor local beached (BL) and floating (FL) marine litter items. In this work, the operational insights to carry out both BL and FL surveys using UAVs are detailly described. In particular, flight planning and deployment, along with image products processing and analysis, are reported and compared. Furthermore, analogies and differences between UAV-based BL and FL mapping are discussed, with focus on the challenges related to BL and FL item detection and recognition. Given the efficiency of UAV to map BL and FL, this remote sensing technique can replace traditional methods for litter monitoring, further improving the knowledge of marine litter dynamics in the marine environment. This communication aims at helping researchers in planning and performing optimized drone-based BL and FL surveys.

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“…Although, the rich supply of pneumatophores attracts spawning organisms (Wickramasinghe et al 2022;Deng et al 2022), it also serves as a trap for plastic pollutants (Cesarini and Scalici, 2022) that contaminates organisms (Fig. 3) (Portz et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Growth, abundance, and diversity of black mangrove (Avicennia germinans) pneumatophores in deforested and sand-filled mangrove forest at Eagle Island, Niger Delta Nigeria

Numbere

¹

,

Camilo

²

2022

Preprint

0

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Pneumatophore is a major channel of oxygen circulation in mangrove forest. It is hypothesized that soil condition, canopy cover and stagnant pool of water can influence pneumatophore growth. Pneumatophore abundance, diversity indices, microbial and chemical composition in sand-filled mangrove forest was studied. Six plots were established within a rectangular area measuring 4152.24m2 in a random block design to investigate the effect of soil conditions on pneumatophore growth. A total of 9,586 pneumatophores were physically counted and differentiated into four types namely 1-branch, 2-branch, 3-branch, and 4-branch pneumatophores. The ANOVA results shows that there is significant difference in the abundance of pneumatophore types (F3, 20 = 7.61, p < .001). The most abundant pneumatophore type is the one branch pneumatophore (n = 4747) while the least is the four branched pneumatophores. The stagnant pool site with silty and muddy soil has the most abundant pneumatophore growth whereas plots in the seashore site with sandy soil has the least abundant pneumatophores. In contrast, the seashore site has the highest diversity (H = 1.367) while the stagnant pool has the lowest diversity (H = 0.956). Metal concentration was higher in the stagnant pool site while microbial count is higher in the seashore site. The study shows that soil condition, canopy cover, stagnant pool plus tidal action influenced pneumatophore growth.

show abstract

“…Although, the rich supply of pneumatophores attracts spawning organisms (Wickramasinghe et al 2022;Deng et al 2022), it also serves as a trap for plastic pollutants (Cesarini and Scalici, 2022) that contaminates organisms (Fig. 3) (Portz et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Growth, abundance, and diversity of black mangrove (Avicennia germinans) pneumatophores in deforested and sand-filled mangrove forest at Eagle Island, Niger Delta Nigeria

Numbere

¹

,

Camilo

²

2022

Preprint

0

View full text Add to dashboard Cite

Pneumatophore is a major channel of oxygen circulation in mangrove forest. It is hypothesized that soil condition, canopy cover and stagnant pool of water can influence pneumatophore growth. Pneumatophore abundance, diversity indices, microbial and chemical composition in sand-filled mangrove forest was studied. Six plots were established within a rectangular area measuring 4152.24m2 in a random block design to investigate the effect of soil conditions on pneumatophore growth. A total of 9,586 pneumatophores were physically counted and differentiated into four types namely 1-branch, 2-branch, 3-branch, and 4-branch pneumatophores. The ANOVA results shows that there is significant difference in the abundance of pneumatophore types (F3, 20 = 7.61, p < .001). The most abundant pneumatophore type is the one branch pneumatophore (n = 4747) while the least is the four branched pneumatophores. The stagnant pool site with silty and muddy soil has the most abundant pneumatophore growth whereas plots in the seashore site with sandy soil has the least abundant pneumatophores. In contrast, the seashore site has the highest diversity (H = 1.367) while the stagnant pool has the lowest diversity (H = 0.956). Metal concentration was higher in the stagnant pool site while microbial count is higher in the seashore site. The study shows that soil condition, canopy cover, stagnant pool plus tidal action influenced pneumatophore growth.

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Where does marine litter hide? The Providencia and Santa Catalina Island problem, SEAFLOWER Reserve (Colombia)

Cited by 19 publications

References 90 publications

Beached and Floating Litter Surveys by Unmanned Aerial Vehicles: Operational Analogies and Differences

Beached and Floating Litter Surveys by Unmanned Aerial Vehicles: Operational Analogies and Differences

Growth, abundance, and diversity of black mangrove (Avicennia germinans) pneumatophores in deforested and sand-filled mangrove forest at Eagle Island, Niger Delta Nigeria

Growth, abundance, and diversity of black mangrove (Avicennia germinans) pneumatophores in deforested and sand-filled mangrove forest at Eagle Island, Niger Delta Nigeria

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