The effects of land-based change on coastal ecosystems

Sahavacharin, Alisa; Sompongchaiyakul, Penjai; Thaitakoo, Danai

doi:10.1007/s11355-022-00505-x

Cited by 19 publications

(6 citation statements)

References 121 publications

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“…Such artificialization destroys native habitats and imposes new physical barriers to natural dispersion patterns, impeding tidal and diadromous movements but also migrations in the marine realm along the coast and beyond (Bishop et al., 2017; Dafforn et al., 2015; Perkins et al., 2015). Seaports are considered as the uttermost urbanized systems in seascapes (Sahavacharin et al., 2022). They are usually enclosed by breakwaters, reducing water flow and increasing local turbidity inside (Bulleri & Chapman, 2010; Dafforn et al., 2015), and their vertical and smooth artificial structures offer less microhabitats like crevices or rock pools, generally associated with high species richness (Aguilera et al., 2014; Firth et al., 2013; Lam et al., 2009; Perkins et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

The Tree of Life eDNA metabarcoding reveals a similar taxonomic richness but dissimilar evolutionary lineages between seaports and marine reserves

Macé,

Mouillot,

Dalongeville

et al. 2024

Molecular Ecology

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Coastal areas host a major part of marine biodiversity but are seriously threatened by ever‐increasing human pressures. Transforming natural coastlines into urban seascapes through habitat artificialization may result in loss of biodiversity and key ecosystem functions. Yet, the extent to which seaports differ from nearby natural habitats and marine reserves across the whole Tree of Life is still unknown. This study aimed to assess the level of α and β‐diversity between seaports and reserves, and whether these biodiversity patterns are conserved across taxa and evolutionary lineages. For that, we used environmental DNA (eDNA) metabarcoding to survey six seaports on the French Mediterranean coast and four strictly no‐take marine reserves nearby. By targeting four different groups—prokaryotes, eukaryotes, metazoans and fish—with appropriate markers, we provide a holistic view of biodiversity on contrasted habitats. In the absence of comprehensive reference databases, we used bioinformatic pipelines to gather similar sequences into molecular operational taxonomic units (MOTUs). In contrast to our expectations, we obtained no difference in MOTU richness (α‐diversity) between habitats except for prokaryotes and threatened fishes with higher diversity in reserves than in seaports. However, we observed a marked dissimilarity (β‐diversity) between seaports and reserves for all taxa. Surprisingly, this biodiversity signature of seaports was preserved across the Tree of Life, up to the order. This result reveals that seaports and nearby marine reserves share few taxa and evolutionary lineages along urbanized coasts and suggests major differences in terms of ecosystem functioning between both habitats.

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Section: Introductionmentioning

confidence: 99%

The Tree of Life eDNA metabarcoding reveals a similar taxonomic richness but dissimilar evolutionary lineages between seaports and marine reserves

Macé,

Mouillot,

Dalongeville

et al. 2024

Molecular Ecology

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“…The manner in which this affects water quality and quantifying the impact on water quality are critical issues to be addressed. Consequently, research on water quality prediction models in both terrestrial and marine systems is a topic of great interest worldwide [1].…”

Section: Introductionmentioning

confidence: 99%

“…The objectives of this study were to (1) improve the water quality model to accurately reflect the water body environment with respect to its benthic flux rate, which acts as an internal load when simulating long-term water quality, and (2) examine the reproducibility of the improved model by reflecting the spatiotemporal change in the benthic flux rate while considering influencing factors such as anaerobic and aerobic conditions in the water layer. Calibration and verification of the model were performed in 2013 and 2016, respectively.…”

Section: Introductionmentioning

confidence: 99%

An Improved Model for Water Quality Management Accounting for the Spatiotemporal Benthic Flux Rate

Kim

Park

2023

Water

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Although water quality models provide useful interpretations for water quality management, it is critical to accurately input and simulate the flux rate, which varies with space and time. In the Environmental Fluid Dynamics Code model, the flux rate value set does not consider spatiotemporal variability. The water quality of the Saemangeum freshwater lake in Korea is poor despite quality improvement measures. In this study, the model was improved by considering the characteristics of flux rates that change spatiotemporally based on environmental conditions and factors influencing the benthic layer. An exponential relational expression was generated and applied to the model while considering the aerobic, anaerobic, and influencing factors. Results from four important sites in the Saemangeum Reservoir were compared with the RSR, %Difference, and AME results of the previous model for evaluating the reproducibility of the improved model. Calibration and verification of the model were performed in 2013 and 2016, respectively. The improved model yielded values close to the optimal value after computing the evaluation functions of both models. It had excellent reproducibility and simulated water quality by reflecting a reasonable value for the benthic flux rate. The improved model can be extended to evaluate other water bodies in the future.

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“…Furthermore, marine ecosystems play a pivotal role in climate regulation, serving as significant carbon sinks and oxygen sources [3,4]. Unfortunately, industrial development along the coast has led to the degradation of these ecosystems and a decline in the living resources found within the Exclusive Economic Zone (EEZ), including in relation to coastal and marine biodiversity and productivity [5,6]. The majority of the world's population resides within 60 km of a coast, a number expected to increase by nearly three quarters by 2020 [7,8], making coasts vulnerable to episodic events like the depletion of green cover, which has been an ongoing issue since the dawn of human civilization and continues to threaten the environment.…”

Section: Introductionmentioning

confidence: 99%