Spatial variation in photosynthetic recovery of intertidal turf algae from acute UVB and temperature stress associated with low tides along the central coast of Chile

Wieters, Evie A.; Medrano, Alba; Quiroga, Gonzalo

doi:10.1016/j.jembe.2013.10.008

Cited by 9 publications

(2 citation statements)

References 70 publications

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“…They can also serve as input for mechanistic models to predict body temperatures (e.g., Helmuth ; Denny et al ; Wethey et al ) and desiccation (Iacarella and Helmuth ), as well as survival, growth and reproduction (Van Der Meer ; Matzelle et al ). The characterization of the submersion regime could help explain and model the spatio‐temporal variations in rates of recruitment of intertidal species (Tapia and Navarrete ; Navarrete et al ), mass mortality of invertebrates (e.g., Harley ) and whitening of intertidal algae (Martone et al ; Wieters et al ). Because eco‐physiological effects of climate change on intertidal communities will depend on the submersion regime of organisms (Helmuth et al ; Mislan et al ), and climate change induces variations in wind intensity (Rhein et al ; Belmadani et al ; Wang et al ) and wave height (Izaguirre et al ; Dobrynin et al ), availability of reliable methods for quantifying submersion regimes are highly relevant, and our remote sensing method represents a significant advance in this direction.…”

Section: Discussionmentioning

confidence: 99%

A new remote sensing method for high-resolution quantification of submersion regimes in wave exposed shores

Flores

Aguilera

Almar

et al. 2016

Limnol. Oceanogr. Methods

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The importance of the submersion regime for the physiology, behavior and ecology of intertidal organisms, as well as limitations of available measurement methods, motivated us to develop a new remote sensing method. This new method is based on video monitoring of visual references installed at interest positions in the intertidal zone. Video imagery processing algorithms discriminate between states of submersion and emersion. The signal is based on the fluctuation in the color contrast between the visual reference and the adjacent rock. Our remote sensing method was validated favorably by comparing with direct field observations of submersion time series and comparison of different submersion metrics, including submersion percentage and maximum emersion duration. Since the remote sensing method captures and stores imagery remotely, obtaining long records of high temporal resolution is facilitated and the risk of discontinuity of time series is reduced in comparison to the use of sensors at the zone of wave impact. The high temporal resolution is critical for environments with high exposure to waves and allows for reliable estimates of a wide variety of relevant submersion metrics. This low cost remote sensing method should encourage quantification of submersion regimes of organisms inhabiting rocky intertidal zones, as well as the exploration of physiological, behavioral and ecological consequences of these regimes. Identifying the character of the forces underlying submersion regimes, together with critical environmental variables, such as temperature and solar radiation, will allow better hind‐casts and forecasts of the ecological consequences of past and future climate change on these communities.

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Section: Discussionmentioning

confidence: 99%

A new remote sensing method for high-resolution quantification of submersion regimes in wave exposed shores

Flores

Aguilera

Almar

et al. 2016

Limnol. Oceanogr. Methods

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“…Bleaching of corals (Ampou et al, 2017) and algae (Hawkins and Hartnoll, 1985;Scrosati and DeWreede, 1998;Wieters et al, 2013) are particularly clear biological stress responses associated with exposure to anomalous environmental conditions (Brown, 1997). Manifested as the loss of symbiotic zooxanthellae or damage to photosynthetic pigments (Davison and Pearson, 1996), bleaching events are occurring worldwide at historically unprecedented rates (Anthony, 2016) leading to marked reductions in primary productivity (Harley et al, 2012;Irving et al, 2004;Kayanne et al, 2005), and negative impacts on food web structure and ecosystem functioning (Graham et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Removal of intertidal grazers by human harvesting leads to alteration of species interactions, community structure and resilience to climate change

Chaverra

Wieters

Foggo

et al. 2019

Marine Environmental Research

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Extreme fluctuations in abiotic conditions can induce a biological stress response (e.g. bleaching) detrimental to an organism's health. In some instances, organisms can recover if conditions are alleviated, such as through cooccurrence with other species that confer protection. Biodiverse, multitrophic communities are increasingly recognised as important promoters of species persistence and resilience under environmental change. On intertidal shores, the role of grazers as top-down determinants of algal community structure is well recognised. Similarly, the harvesting of grazers for human consumption is increasingly prevalent with potential to greatly alter the community dynamics. Here, we assess how differences in harvesting pressure of grazers under three management regimes (no-take; managed access; open-access) alters the trophic interactions between grazers, and algal communities. Grazer density and body size frequencies were different among regimes leading to changes in the photosynthetic performance and recovery of crustose coralline algae (CCA) post-bleaching, as well as their presence altering the strength of interactions between species. The exclusion of grazers from patches using cages led to different emergent communities and reduced negative correlations between taxa. The absence of larger grazers (>9cm) at the managed access site led to macroalgal overgrowth of bleached CCA negatively affecting its recovery, whereas no-take or open-access led to a moderated algal growth and a shift from competitive to facilitative interactions between algal species. Given that CCA play an important role in the population growth and development of other species, the choice of management measure should be carefully considered before implementation, depending on objectives.

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Float and Raft: Role of Buoyant Seaweeds in the Phylogeography and Genetic Structure of Non-buoyant Associated Flora

Macaya

López

Tala

et al. 2016

Seaweed Phylogeography

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Spatial variation in photosynthetic recovery of intertidal turf algae from acute UVB and temperature stress associated with low tides along the central coast of Chile

Cited by 9 publications

References 70 publications

A new remote sensing method for high-resolution quantification of submersion regimes in wave exposed shores

A new remote sensing method for high-resolution quantification of submersion regimes in wave exposed shores

Removal of intertidal grazers by human harvesting leads to alteration of species interactions, community structure and resilience to climate change

Float and Raft: Role of Buoyant Seaweeds in the Phylogeography and Genetic Structure of Non-buoyant Associated Flora

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