Food availability on the shore: Linking epilithic and planktonic microalgae to the food ingested by two intertidal gastropods

Ding, Meng-wen; Wang, Zhao-kai; Dong, Yun‐wei

doi:10.1016/j.marenvres.2018.02.005

Cited by 15 publications

(12 citation statements)

References 61 publications

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“…These studies were not only consistent with the correlation between the presentation of C. striatus and SAT cover (Figure 3D), but the increasing ciguatera poisoning could also be explained by the increasing chances of dinoflagellates ingested by C. striatus on reefs with moderate coral cover (Figures 4, 5A). Even though microalgae are important food resources for consumers in other marine ecosystems (Ding et al, 2018), they are of less concern in coral reef ecosystems (Clements et al, 2017). Technically, the exact biomass or abundance of dinoflagellates ingested by C. striatus could not be converted from RRA data in this study, for example, due to the differences between dinoflagellates and other algae in copy number.…”

Section: The Positive Feeding Response Of C Striatus To Disturbed Habitatmentioning

confidence: 97%

Disturbance-Mediated Changes in Coral Reef Habitat Provoke a Positive Feeding Response in a Major Coral Reef Detritivore, Ctenochaetus striatus

Lin

Liu

et al. 2021

Front. Mar. Sci.

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Coral reefs are undergoing global phase shifts from coral-dominated to algae-dominated stages. The negative effects of this substratum shift on the diversity and abundance of fish have been well documented, but the influence on fish feeding is less studied, which may limit a deeper understanding of trophic pathways in such a disturbed system. In this study, we investigated the feeding response of a numerically dominant fish species Ctenochaetus striatus to different substrate types, including hard coral, short algal turfs (SATs, <5 mm), and long algal turfs (LATs, >5 mm), on reefs in the South China Sea. The biomass of C. striatus showed an inverted U-shaped relationship with coral coverage and a significant positive correlation with SAT coverage (p < 0.05), indicating that rising SAT coverage associated with moderate coral loss provoked a feeding response in C. striatus. Stomach contents of C. striatus, analyzed using high-throughput sequencing (HTS), were dominated by algal sequences (relative read abundance, RRA > 80.0%), including macroalgae, filamentous algae, and microalgae (e.g., Symbiodinium and Prorocentrum). The sequence number and diversity of microalgae (mainly dinoflagellates) tended to be abundant (RRA 13.5–36.5%) with increased SAT cover, but brown algae sequences (RRA 17.2–57.8%) or green algae sequences (RRA > 50.7% except one site) dominated the stomach content DNA in reefs with high coral cover and high LAT or macroalgal cover, respectively. Considering the limited ability of C. striatus to remove mature algae, macroalgal DNA might be from algal debris. Our results indicate that C. striatus populations respond positively to conditions of moderate coral loss through increases in body condition identified as increased biomass. These responses are correlated to the expansion of SAT’s as coral cover declined, however, this relationship reverses if coral loss is high due to the succession of LAT’s over SAT’s and a corresponding decrease in the quality of food available. Our use of HTS has nevertheless identified the importance of detritivory in the flow of energy through reefs in the Anthropocene which are increasingly becoming depauperate in hard coral.

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Section: The Positive Feeding Response Of C Striatus To Disturbed Habitatmentioning

confidence: 97%

Disturbance-Mediated Changes in Coral Reef Habitat Provoke a Positive Feeding Response in a Major Coral Reef Detritivore, Ctenochaetus striatus

Lin

Liu

et al. 2021

Front. Mar. Sci.

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“…Various abiotic and biotic cues on the substrate, such as surface texture/roughness and complexity (Coombes et al, 2015;Loke & Todd, 2016;Sedano et al, 2020) and chemical cues produced by conspecifics and microbial biofilms (Coombes et al, 2015;Ding et al, 2018;Pawlik, 1992), can influence the rate and patterns of larval supply and settlement (Ding et al, 2018;Hunt & Scheibling, 1997), and thereby the structuring of macrobenthic communities (Loke & Todd, 2016;Sedano et al, 2020;. Furthermore, the composition of the intertidal community on the artificial structures is also related to the environmental tolerances of the species living on the artificial structures (Ayre et al, 2009).…”

Section: Larval Settlement and Seascape Transformationmentioning

confidence: 99%

Northward shift of a biogeographical barrier on China’s coast

Dong

2021

Diversity and Distributions

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“…The containers were immersed in water baths, allowing the temperature in the container to be increased at a rate of 6 • C h −1 that simulated emersion in the natural environment. Heart rates were measured using a noninvasive method (Chelazzi et al, 2001;Dong and Williams, 2011). The heartbeat was detected by means of an infrared sensor fixed with Blu Tack (Bostik, Staffordshire, UK) on the limpet shell at a position above the heart.…”

Section: Cardiac Performance Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Heart rate, as a measure of cardiac activity, is a useful indicator for indicating physiological response to stress in mollusks (Dong and Williams, 2011;Xing et al, 2016). Animals exhibit a stable basal heart rate under conditions which are not thermally stressful, and heart rate increases and reaches a peak followed by a sudden decrease with temperature rising (Braby and Somero, 2006;Dong and Williams, 2011). The temperature at which a sharp discontinuity in slope occurs in an Arrhenius plot (i.e., Arrhenius breakpoint temperature, ABT) can represent the limit of metabolic functioning of animals (Nickerson et al, 1989;Somero, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Ocean acidification increases the sensitivity of and variability in physiological responses of an intertidal limpet to thermal stress

et al. 2018

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Abstract. Understanding physiological responses of organisms to warming and ocean acidification is the first step towards predicting the potential population- and community-level ecological impacts of these stressors. Increasingly, physiological plasticity is being recognized as important for organisms to adapt to the changing microclimates. Here, we evaluate the importance of physiological plasticity for coping with ocean acidification and elevated temperature, and its variability among individuals, of the intertidal limpet Cellana toreuma from the same population in Xiamen. Limpets were collected from shaded mid-intertidal rock surfaces. They were acclimated under combinations of different pCO2 concentrations (400 and 1000 ppm, corresponding to a pH of 8.1 and 7.8) and temperatures (20 and 24 ∘C) in a short-term period (7 days), with the control conditions (20 ∘C and 400 ppm) representing the average annual temperature and present-day pCO2 level at the collection site. Heart rates (as a proxy for metabolic performance) and expression of genes encoding inducible and constitutive heat-shock proteins (hsp70 and hsc70) at different heat-shock temperatures (26, 30, 34, and 38 ∘C) were measured. Hsp70 and Hsc70 play important roles in protecting cells from heat stresses, but have different expression patterns, with Hsp70 significantly increased in expression during stress and Hsc70 constitutively expressed and only mildly induced during stress. Analysis of heart rate showed significantly higher temperature coefficients (Q10 rates) for limpets at 20 ∘C than at 24 ∘C and post-acclimation thermal sensitivity of limpets at 400 ppm was lower than at 1000 ppm. Expression of hsp70 linearly increased with the increasing heat-shock temperatures, with the largest slope occurring in limpets acclimated under a future scenario (24 ∘C and 1000 ppm pCO2). These results suggested that limpets showed increased sensitivity and stress response under future conditions. Furthermore, the increased variation in physiological response under the future scenario indicated that some individuals have higher physiological plasticity to cope with these conditions. While short-term acclimation to reduced pH seawater decreases the ability of partial individuals against thermal stress, physiological plasticity and variability seem to be crucial in allowing some intertidal animals to survive in a rapidly changing environment.

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Food availability on the shore: Linking epilithic and planktonic microalgae to the food ingested by two intertidal gastropods

Cited by 15 publications

References 61 publications

Disturbance-Mediated Changes in Coral Reef Habitat Provoke a Positive Feeding Response in a Major Coral Reef Detritivore, Ctenochaetus striatus

Disturbance-Mediated Changes in Coral Reef Habitat Provoke a Positive Feeding Response in a Major Coral Reef Detritivore, Ctenochaetus striatus

Northward shift of a biogeographical barrier on China’s coast

Ocean acidification increases the sensitivity of and variability in physiological responses of an intertidal limpet to thermal stress

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