Fine sediment effects on seagrasses: A global review, quantitative synthesis and multi-stressor model

Zabarte-Maeztu, Iñigo; Matheson, Fleur E.; Manley‐Harris, Merilyn; Davies‐Colley, Robert J.; Hawes, Ian

doi:10.1016/j.marenvres.2021.105480

Cited by 11 publications

(3 citation statements)

References 124 publications

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“…However, it is important to note that not all mud substrates are equally beneficial for the survival and growth of seagrass. For instance, mud with high organic content can lead to adverse physico-chemical effects on seagrass (Zabarte-Maeztu et al, 2021).…”

Section: Correlation Dominant Substrate Type With Alpha Diversitymentioning

confidence: 99%

Seagrass Biodiversity and its Drivers in the Kepulauan Banyak Marine Nature Park, Indonesia

Nasution,

Hermi,

Heriansyah

et al. 2024

Indo. J. Mar. Sci.

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Seagrasses are important marine plants that provide a variety of ecosystem services, including food and shelter for marine life, and protection from coastal erosion. This study investigated the biodiversity (alpha and beta diversity) of seagrass in the Kepulauan Banyak Marine Nature Park, Indonesia, with a specific focus on eight sites. Alpha diversity was calculated using Shannon's index, Simpson's index, and Pielou evenness. Beta diversity was determined using Bray-Curtis dissimilarity and Jaccard dissimilarity allowing us to examine the variations in species composition among different sites. Principal coordinate analysis and Partial distance-based redundancy analysis was used to visualize and investigate the impact of constraint variables to the structure of the seagrass communities. Alpha diversity varied among the sites, with the highest alpha diversity found at the Orongan and Matahari site and the lowest at the Ujung Lolok and Balai sites. The dominant substrate type (mud or sand) was found to be a significant (P≤ 0.01) determinant of seagrass alpha diversity, with mud substrates supporting higher diversity than sand substrates. The relationship between alpha diversity and constrain variables was only significant with closest distance to forest lost and longitude variables. The analysis found that water pH, closest distance to forest lost, mean distance to tourism spots, and closest distance to settlement collectively explained a significant (P≤ 0.001) portion (88.48%) of the variation in beta diversity of seagrass across the sites. The results of this study can be used to develop management strategies for the conservation of seagrass meadows in the park.

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Section: Correlation Dominant Substrate Type With Alpha Diversitymentioning

confidence: 99%

Seagrass Biodiversity and its Drivers in the Kepulauan Banyak Marine Nature Park, Indonesia

Nasution,

Hermi,

Heriansyah

et al. 2024

Indo. J. Mar. Sci.

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“…Consistent with these findings and shown here, a substantial part of organic material and fine grain size classes are lost already during the extraction process. This means that buried organic material is resuspended in the water column and subsequently forms a fluffy layer, which alters the oxygen balance of the upper sediment layers and has a negative effect on the infauna at the extraction site [49]. Consequently, the turbidity plume and nutrient concentrations at the extraction site should be investigated and taken into account as well.…”

Section: Critical Interpretation and Inter-comparisonmentioning

confidence: 99%

Suspended Particle Dynamics during Sand Nourishments and Storm Events: A Comparative Analysis

Glueck,

Schubert

2024

Sediment Transport Research - Further Recent Advances

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Understanding sediment transport during sand nourishment and storm events is crucial for coastal management and environmental preservation. This chapter provides key insights for policymakers, coastal engineers, and researchers working to balance coastal protection and ecosystem sustainability. It offers an analysis of suspended particle behavior in the water column post-sand nourishment, a coastal protection measure, in comparison to a natural storm event. This allows estimating spatial and temporal effects of coastal protection measures on turbidity and sedimentation in neighboring areas. Pronounced differences in increased turbidity longevity were observed, with sand nourishment-induced turbidity persisting for at least 3 months, spanning a minimum of 4 km along the coast. Additionally, this study reveals elevated nutrient concentrations in the pore water of nourished sediment and the water column during the sand nourishment, along with an increase in fine sediment particles in the nourished sediment due to the use of sand from sedimentation sinks.

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“…Following arrival by European settlers in the 1800s, extensive deforestation for pastoral farming resulted in a geomorphic landscape response consisting of high erosion and sedimentation rates [1][2][3][4][5]. Increased erosion rates have led to a variety of adverse consequences, including i) reduced land productivity, ecosystem services, and food security through loss of productive soil; ii) increased damage to infrastructure; iii) adverse impacts on water quality and aquatic ecosystems from increased sediment delivery to streams; and iv) negative impacts for cultural values related to soil and aquatic environments [6][7][8][9][10][11][12][13]. Erosion processes in New Zealand remain very active [14], due to a predisposed natural environment with steep slopes, weak sedimentary rocks, and a climate featuring high annual rainfall and relatively frequent high magnitude rainfall events [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Drivers and New Opportunities for Woody Vegetation Use in Erosion Management in Pastoral Hill Country in New Zealand

McIvor¹,

Mackay-Smith²,

Spiekermann³

2024

Soil Erosion - Risk Modeling and Management

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Increases in the magnitude and frequency of rainfall events in New Zealand due to climate change, coupled with existing concerns about sediment and nutrient contamination of waterways, are changing policy and practice around erosion management and land use. We describe the challenges around slope erosion reduction, cover current legislation and management practices, illustrate how modeling can inform erosion management and describe new opportunities, whereby native species can become a new active management tool for erosion control. Passive erosion management depending on natural revegetation by slow growing woody species is used on land retired from grazing but is much less effective than active erosion management in reducing shallow slope erosion. Active erosion management using exotic fast-growing poplar and willow trees strategically placed on hillslopes is effective in reducing erosion, but these trees can be hard to establish on drier upper slopes. An endemic woody tree, Kanuka, grows on drier slopes and is being tested as an erosion control tool. Kanuka seedlings have been successfully established on pastoral slopes, including drier slopes. A spatial decision support tool developed to identify pastoral hillslopes at high risk of erosion has improved decision-making when positioning appropriate trees on these slopes.

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Fine sediment effects on seagrasses: A global review, quantitative synthesis and multi-stressor model

Cited by 11 publications

References 124 publications

Seagrass Biodiversity and its Drivers in the Kepulauan Banyak Marine Nature Park, Indonesia

Seagrass Biodiversity and its Drivers in the Kepulauan Banyak Marine Nature Park, Indonesia

Suspended Particle Dynamics during Sand Nourishments and Storm Events: A Comparative Analysis

Drivers and New Opportunities for Woody Vegetation Use in Erosion Management in Pastoral Hill Country in New Zealand

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