The influence of monsoons on the spatial distribution and composition of floating marine litter
2022
Okuku, Eric Ochieng | Owato, Gilbert | Otieno, Kenneth | Kombo, Maureen Mokeira | Chiphatsi, Mary Mbuche | Gwada, Brenda | Chepkemboi, Purity | Wanjeri, Veronica | Kiteresi, Linet Imbayi | Achieng, Quinter | Nelson, Annette
Floating marine litter (FML) surveys were conducted in the near shore waters of Mombasa, Kilifi and Kwale Counties of Kenya through trawling using a manta net. A mean density of 26,665 ± 2869 items km⁻² composed of 34.8% hard plastic, 40.5% soft plastics and 22.0% plastic lines/fibers was reported in this study. Litter densities in Kwale, Kilifi and Mombasa Counties were not influenced by monsoons, however, litter composition was influenced by monsoons with NEM and SEM being dominated mainly by hard plastics and soft plastics respectively. Litter categories diversity, evenness and richness were also not influenced by the monsoons during both NEM (1.01, 0.78 and 3, respectively) and SEM (1.09, 0.78 and 4, respectively). Fishing and recreational beaches had higher litter densities during NEM compared to SEM attributed to higher beach visitation and increased fishing activities during the calmer NEM season.
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