Visually-based alternatives to sediment environmental monitoring

Simone, Michelle; Grant, Jon E.

doi:10.1016/j.marpolbul.2020.111367

Cited by 4 publications

(6 citation statements)

References 47 publications

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“…These images can be quickly collected and analysed, are easily interpreted and have even been used to engage citizens in participatory research 83 83 and fill gaps where traditional geochemical indicators fall short 84 …”

Section: Resultsmentioning

confidence: 99%

“…83 While visual indicators have been present in the literature beginning in 2003, they have been appearing more consistently from 2016 onwards and seem likely to continue developing, especially where they enable engagement with coastal communities 83 and fill gaps where traditional geochemical indicators fall short. 84 The remaining benthic indicators included 'trace elements' (6%)…”

Section: Benthic Effectsmentioning

confidence: 99%

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Environmental indicators in salmon aquaculture research: A systematic review

Rector

Weitzman

Filgueira

et al. 2021

Reviews in Aquaculture

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The ecosystem approach to aquaculture (EAA) is a strategy for the sustainable development of the aquaculture sector, but the question of how it can be practically implemented remains unclear. Indicators that can be applied at relevant scales of impact and that reflect the environmental status and change offer a means of operationalizing EAA. Therefore, a systematic literature review was carried out to identify environmental indicators referenced in salmon aquaculture literature and review their potential to support EAA. Using the PRISMA method for selecting journal papers, 101 articles that included 531 indicators were reviewed. Indicators were characterized based on the effect of aquaculture they measure, their similarity to other indicators extracted, and the scale at which they were applied. Indicators and their characteristics are presented in a searchable online database. A scoring method for evaluating indicators based on criteria drawn from environmental indicator literature and the potential scalability of indicators to meet the needs of EAA was developed and applied to the most frequently referenced indicators. Overall, near-field indicators of benthic impacts dominated salmon aquaculture literature. Of the most frequently referenced indicators, those that scored highest based on criteria drawn from environmental indicator literature also scored highest on scalability and therefore their potential contribution to EAA. Overall, results suggest that additional research and application of far-field environmental indicators in salmon aquaculture will be required to identify a suite of indicators that can be applied as part of EAA practice.

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Section: Resultsmentioning

confidence: 99%

Section: Benthic Effectsmentioning

confidence: 99%

Environmental indicators in salmon aquaculture research: A systematic review

Rector

Weitzman

Filgueira

et al. 2021

Reviews in Aquaculture

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“…To test the survival of these species in sediments with different levels of nutrient pollution, sediments were collected from Rozelle Bay and Rushcutters Bay (Figure 1) in February 2020. In each bay, sediments were collected at three sites with different levels of nutrient pollution (low, medium and high) selected based on level of oxygenation by visual characteristics including sediment colour from light‐brown (oxidised) to black (reduced), and sulphurous odour as indicative of anoxia (Simone & Grant, 2020). Later analyses confirmed that sediments classified as low, medium and high levels of pollution had increasing levels of organic matter (Table S1).…”

Section: Methodsmentioning

confidence: 99%

Below‐ground ecosystem engineers enhance biodiversity and function in a polluted ecosystem

Bugnot

Gribben

O’Connor

et al. 2022

Journal of Applied Ecology

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Many important ecosystem functions are underpinned by below‐ground biodiversity and processes. Marine sediments, one of the most abundant habitats on earth, are essential to the mineralisation of organic matter. However, they are increasingly polluted by urban activities leading to the loss of biodiversity and the functions they provide. While traditional sediment remediation strategies are focussed on microbial and engineering solutions, we propose that the reintroduction of below‐ground ecosystem engineers (bioturbators) is important to rehabilitate polluted sediments and drive recovery of their functions in urban coastal ecosystems. We tested this notion by introducing bioturbators to nutrient polluted sediments to assess their survival, as well as their capacity to drive biodiversity and oxygenation and their potential to remediate nutrient pollution. Polychaete worms Diopatra aciculata and clams Katelysia sp. were added to mesocosms (ex‐situ), and the worms also added to experimental plots in‐situ. Potential for remediation was assessed with measures of nutrient content. All animals survived when introduced to polluted sediments and showed no evidence of sub‐lethal effects. Worms oxygenated sediments and reduced organic matter content by up to 50% in‐situ. The worms also drove shifts in the receiving communities at all locations and increased the number of taxa at one location. On the other hand, the effects of clams were variable, showing opposite effects in organic matter content at different sites and levels of pollution. Synthesis and applications. Global seafloor habitats are becoming increasingly degraded and novel strategies that combine biodiversity restoration with remediation are urgently needed to return function. Tube‐building bioturbators can stimulate nutrient processing in sediments proving multiple functional outcomes, but these effects are dependent on the receiving environment. In areas with medium levels of pollution, they can kick‐start recovery in a feedback loop whereby bioturbation increases oxygenation and nutrient remediation, shifting sediment biodiversity and contributing to further recovery. This can drive long‐term changes in sediment communities, particularly in urban areas where unvegetated sediments are conspicuous.

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“…Alternatively, sediment profile imagery or sediment surface video or photography have been proposed as tools to identify more biogeochemically integrative proxies than porewater solute concentrations alone. [30][31][32] For instance, in soft sediments, an integrative measure of change, such as the depth of the apparent redox potential discontinuity, 33 can be incorporated with other visual indicators (e.g., Beggiatoa sp. coverage 34 ) to detect a response of the sedimentary ecosystem to enrichment, 30 and if necessary, trigger mitigation actions.…”

Section: Incorporating Metabolic Functioning Measurements For Proacti...mentioning

confidence: 99%

“…[30][31][32] For instance, in soft sediments, an integrative measure of change, such as the depth of the apparent redox potential discontinuity, 33 can be incorporated with other visual indicators (e.g., Beggiatoa sp. coverage 34 ) to detect a response of the sedimentary ecosystem to enrichment, 30 and if necessary, trigger mitigation actions. We recognise the obvious value in these visual and geochemical measures as proxies of biological responses to organic enrichment.…”

Section: Incorporating Metabolic Functioning Measurements For Proacti...mentioning

confidence: 99%

The need for proactive environmental management of offshore aquaculture

Simone,

Vopel

2023

Reviews in Aquaculture

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Visually-based alternatives to sediment environmental monitoring

Cited by 4 publications

References 47 publications

Environmental indicators in salmon aquaculture research: A systematic review

Environmental indicators in salmon aquaculture research: A systematic review

Below‐ground ecosystem engineers enhance biodiversity and function in a polluted ecosystem

The need for proactive environmental management of offshore aquaculture

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