Sediment Deposition in a South Sulawesi Seagrass Bed

Lanuru, Mahatma; Fitri, Ramdina

doi:10.14203/mri.v33i2.521

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Previous studies have found flow attenuation and sediment deposition to be density dependent [29]. Sampling of all the seagrass was conducted in the centre of the meadow, where density is expected to be greater and theoretically where microplastic abundance should be highest [30]. A 5-cm sediment depth core was taken as previous studies have highlighted that a core must be between 4-5 cm deep in order to assess the standing stock of microplastics in marine sediments [31].…”

Section: Sediment Samplingmentioning

confidence: 99%

Canopy Accumulation: Are Seagrass Meadows a Sink of Microplastics?

Unsworth

Higgs

Walter

et al. 2021

Oceans

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A growing body of research is documenting the accumulation of microplastics within marine sediments around the world. The hydrodynamic influences of seagrasses in coastal environments are shown to increase sedimentation of finer particles and as a result there has been speculation that this attribute will lead to seagrass meadows acting as a site of elevated microplastic contamination. To date a range of localised studies have provided conflicting answers to this hypothesis. Seagrass meadows provide multiple ecosystem services including vital support roles for a range of fisheries; therefore, there are considerable human health implications for understanding their role as sinks of microplastics. This research investigated the abundance and diversity of microplastics present in temperate North Atlantic seagrass meadow sediments relative to unvegetated sediments and examined how they correlate with the meadow structure and the sediment type. We also placed this data in the context of the current knowledge of microplastics in seagrass sediments through a global meta-analysis of published data. Eight seagrass meadows and adjacent unvegetated sites around the UK were sampled to test for the abundance of microplastic particles in the sediment. Microplastics were found in 98% of the samples, with fibres making up 91.8% of all microplastics identified. Abundance was recorded to overall be 215 ± 163 microplastic particles (MP) kg−1 Dry Weight (DW) of sediment in seagrass and 221 ± 236 MP kg−1 DW of sediment in unvegetated habitats. There were no significant differences found between the number of MP with respect to vegetation. We report evidence of the almost ubiquitous contamination of seagrass sediments with microplastics both in the UK and globally but find that the contamination reflects a general build-up of microplastics in the wider environment rather than becoming concentrated within seagrass as an enhanced sink. Microplastic build up in sediments is hypothesised to be the result of local hydrodynamics and plastic sources rather than the result of elevated habitat level concentration. Although not of a higher abundance in seagrass, such contamination in seagrass is of cause for concern given the high dependency of many species of fish on these habitat types and the potential for plastics to move up the food chain.

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Section: Sediment Samplingmentioning

confidence: 99%

Canopy Accumulation: Are Seagrass Meadows a Sink of Microplastics?

Unsworth

Higgs

Walter

et al. 2021

Oceans

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“…Main Parameter (Sedimentation rate): The main parameter observed is the sedimentation rate which is calculated using the formula [17,18] as follows:…”

Section: Observation Methodsmentioning

confidence: 99%

Value estimating of the sedimentation rate at the shipwreck sites (MV Boelongan Nederland) the Mandeh Bay Region-Pesisir Selatan Regency

Hermon

Gusman

Putra

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Sufficiently high sediment deposit at the shipwreck diving site (MV Boelongan Nederland) the Mandeh bay region - Pesisir Selatan Regency due to infrastructure development has resulted in significant changes in the physical environment and may affect the existence of the shipwreck diving site. The analysis method regarding the sedimentation rate is carried out based on data from sediment traps that have been installed at the location of the shipwreck diving site, river flow, and river estuary. Based on the sedimentation rate measurement from the sediment trap, there is a close relationship between the sediment supply of the Mandeh river flow and the Nyalo river flow that affects the sedimentation rate at the shipwreck diving site. Where it was found the sedimentation rate in the shipwreck diving site was 15,33 g.m-2day-1. With the condition of the waters of Mandeh bay region being semi-closed from open water, it is suspected that the sediment contributed from these rivers is mostly trapped and settled in these water areas.

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Sediment Deposition in a South Sulawesi Seagrass Bed

Cited by 2 publications

References 9 publications

Canopy Accumulation: Are Seagrass Meadows a Sink of Microplastics?

Canopy Accumulation: Are Seagrass Meadows a Sink of Microplastics?

Value estimating of the sedimentation rate at the shipwreck sites (MV Boelongan Nederland) the Mandeh Bay Region-Pesisir Selatan Regency

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