Sediment Suspension and Deposition Across Restored Oyster Reefs of Varying Orientation to Flow: Implications for Restoration

Colden, Allison; Fall, Kelsey A.; Cartwright, Grace M.; Friedrichs, Carl T.

doi:10.1007/s12237-016-0096-y

Cited by 52 publications

(40 citation statements)

References 34 publications

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“…In a recent paper on the impact of mussel beds on MPB biomass development, Engel et al (2017) attributed the positive effect of such beds on MPB biomass to a combination of reduced hydrodynamic stress and increased nutrient availability (and also to potential changes in the associated invertebrate community). In contrast with the observations of Colden et al (2016) and Engel et al (2017), our BACI experiment, in which the oysters were killed while the physical structure of the reef itself was not modified, now allows the pure physical (hydrodynamic) effect to be distinguished from the biological (nutrient enrichment) effect of the oyster reefs, suggesting that the latter process is more important in our study area. In this respect, the resilience of MPB biomass development around the impacted reef, observed 1 year after the experiment, is probably due to the recolonization of the dead reef by young oysters, following the exceptionally high recruitment which occurred during autumn 2014 (Pouvreau et al, 2015).…”

Section: Oyster Reefs Influence On Mpb Biofilm Developmentmentioning

confidence: 68%

“…Via the release of organic and inorganic matter through excretion and biodeposition (Dame, 1993;Cognie and Barillé, 1999;Newell, 2004;Buzin et al, 2015), oysters can have an impact by enriching the sediment around them, increasing nutrient availability and hence development of MPB (Dame, 1993;Garcia-Robledo et al, 2016). Oyster reefs are also known to have indirect effects such as modifying the structure of the surrounding sediment and the ambient hydrodynamic conditions, facilitating MPB establishment (Colden et al, 2016). In a recent paper on the impact of mussel beds on MPB biomass development, Engel et al (2017) attributed the positive effect of such beds on MPB biomass to a combination of reduced hydrodynamic stress and increased nutrient availability (and also to potential changes in the associated invertebrate community).…”

Section: Oyster Reefs Influence On Mpb Biofilm Developmentmentioning

confidence: 99%

“…However, MPB and oyster interactions are more complex than a simple predator-prey relationship. In Colden et al (2016), experimental oyster reefs consisting of empty shells only were shown to modify the local hydrodynamic conditions. They also promote the trapping of fine particles, providing conditions more conducive to benthic microalgal development.…”

Section: Introductionmentioning

confidence: 99%

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Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development

et al. 2018

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Abstract. Satellite remote sensing (RS) is routinely used for the large-scale monitoring of microphytobenthos (MPB) biomass in intertidal mudflats and has greatly improved our knowledge of MPB spatio-temporal variability and its potential drivers. Processes operating on smaller scales however, such as the impact of benthic macrofauna on MPB development, to date remain underinvestigated. In this study, we analysed the influence of wild Crassostrea gigas oyster reefs on MPB biofilm development using multispectral RS. A 30-year time series combining high-resolution (30 m) Landsat and SPOT data was built in order to explore the relationship between C. gigas reefs and MPB spatial distribution and seasonal dynamics, using the normalized difference vegetation index (NDVI). Emphasis was placed on the analysis of a before-after control-impact (BACI) experiment designed to assess the effect of oyster killing on the surrounding MPB biofilms. Our RS data reveal that the presence of oyster reefs positively affects MPB biofilm development. Analysis of the historical time series first showed the presence of persistent, highly concentrated MPB patches around oyster reefs. This observation was supported by the BACI experiment which showed that killing the oysters (while leaving the physical reef structure, i.e. oyster shells, intact) negatively affected both MPB biofilm biomass and spatial stability around the reef. As such, our results are consistent with the hypothesis of nutrient input as an explanation for the MPB growth-promoting effect of oysters, whereby organic and inorganic matter released through oyster excretion and biodeposition stimulates MPB biomass accumulation.MPB also showed marked seasonal variations in biomass and patch shape, size and degree of aggregation around the oyster reefs. Seasonal variations in biomass, with higher NDVI during spring and autumn, were consistent with those observed on broader scales in other European mudflats. Our study provides the first multi-sensor RS satellite evidence of the promoting and structuring effect of oyster reefs on MPB biofilms.

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Section: Oyster Reefs Influence On Mpb Biofilm Developmentmentioning

confidence: 68%

Section: Oyster Reefs Influence On Mpb Biofilm Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development

et al. 2018

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“…Some of the lowest relief reefs at these sites were completely buried by the conclusion of the experiment, whereas reefs ≥0.3 m persisted. In areas where sediment buried a portion of or the entire reef surface, deposition was concentrated at the reef margin, which corresponds to patterns of reef burial for circular 'patch' reefs (Colden et al 2016). In low deposition environments, like that of LR1, sedimentation was not significantly influenced by reef height because low deposition rates were insufficient to produce quantifiable differences across reef heights.…”

Section: Mechanisms and Positive Feedbacksmentioning

confidence: 96%

“…The size and placement of reefs were designed to minimize hydrodynamic interactions between reefs while maintaining constant hydrographic conditions and larval subsidy within the study area. Because the influence of a reef on physical processes scales with reef length (Walles et al 2015a, Colden et al 2016, larger reefs would have required a greater distance between reefs to avoid interactions, making it difficult to maintain consistent depth and hydrographic conditions across the study area, a key component when investigating the potential for alternative stable states (Peterson 1984). Qualitative video monitoring was conducted shortly (2 mo) after construction using a remotely operated vehicle to assess the condition of reef habitat.…”

Section: Field Experimentsmentioning

confidence: 99%

Reef height drives threshold dynamics of restored oyster reefs

Colden¹,

Latour²,

Lipcius³

2017

Mar. Ecol. Prog. Ser.

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Tiger reefs: Self‐organized regular patterns in deep‐sea cold‐water coral reefs

van der Kaaden,

Maier,

Siteur

et al. 2023

Ecosphere

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Complexity theory predicts that self‐organized, regularly patterned ecosystems store more biomass and are more resilient than spatially uniform systems. Self‐organized ecosystems are well‐known from the terrestrial realm, with “tiger bushes” being the archetypical example and mussel beds and tropical coral reefs the marine examples. We here identify regular spatial patterns in cold‐water coral reefs (nicknamed “tiger reefs”) from video transects and argue that these are likely the result of self‐organization. We used variograms and Lomb–Scargle analysis of seven annotated video transects to analyze spatial patterns in live coral and dead coral (i.e., skeletal remains) cover at the Logachev coral mound province (NE Atlantic Ocean) and found regular spatial patterns with length scales between 62 and 523 m in live and dead coral distribution along these transects that point to self‐organization of cold‐water coral reefs. Self‐organization theory shows that self‐organized ecosystems can withstand large environmental changes by adjusting their spatial configuration. We found indications that cold‐water corals can similarly adjust their spatial configuration, possibly providing resilience in the face of climate change. Dead coral framework remains in the environment for extended periods of time, providing a template for spatial patterns that facilitates live coral recovery. The notion of regular spatial patterns in cold‐water coral reefs is interesting for cold‐water coral restoration, as transplantation will be more successful when it follows the patterns that are naturally present. This finding also underlines that anthropogenic effects such as ocean acidification and bottom trawling that destroy the dead coral template undermine cold‐water coral resilience. Differences in the pattern periodicities of live and dead coral cover further present an interesting new angle to investigate past and present environmental conditions in cold‐water coral reefs.

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Sediment Suspension and Deposition Across Restored Oyster Reefs of Varying Orientation to Flow: Implications for Restoration

Cited by 52 publications

References 34 publications

Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development

Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development

Reef height drives threshold dynamics of restored oyster reefs

Tiger reefs: Self‐organized regular patterns in deep‐sea cold‐water coral reefs

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