Predator cues increase negative effects of a simulated marine heatwave on tropical zooplankton

Truong, Kiem N.; Vu, Ngoc-Anh; Doan, Nam X.; Le, Minh Hoang; Vu, Minh T.; Dinh, Khuong Van

doi:10.1016/j.jembe.2020.151415

Cited by 20 publications

(50 citation statements)

References 67 publications

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“…The increased fecundity of prey species in the presence of the predator is an adaptive response to predation. 10 However, the number of clutches was, on average, 18% lower at 28 °C than at 25 °C and 6% lower in the presence of the predator cues (main effects of temperature and predator cues, Table 1). Consequently, it resulted in an overall 13% lower total neonates produced per female under elevated temperature (main effect of temperature, Table 1).…”

Section: Resultsmentioning

confidence: 95%

“…58 The lifespan of M. dubia is also considerably shorter under elevated temperatures, which may contribute to the reduced reproduction. 10 The magnitude of Pb effects on reproductive parameters strongly depended on temperature and predator cues (Pb × temperature, Pb × predator cue interactions, Table 1, Figures 2a−f and 3d−f). First, Pb-induced reductions in the reproductive parameters of M. dubia were considerably more substantial at 25 °C than at 28 °C.…”

Section: Resultsmentioning

confidence: 99%

“…This is because stressors often interact synergistically (the combined effect of multiple stressors > addictive effects of individual stressors) or antagonistically (the combined effect of multiple stressors < addictive effects of individual stressors) . Elevated temperatures often increase the adverse effects of contaminants − and predation stress on aquatic organisms. The predation threats can affect the physiology of prey species, thereby changing their tolerance to other stressors such as temperature , and contaminants. − However, ecological risk assessments of warming − and pollutants on wildlife have largely ignored the role of biotic interaction in shaping the vulnerability of species to abiotic stressors.…”

Section: Introductionmentioning

confidence: 99%

“…Elevated temperatures often increase the adverse effects of contaminants − and predation stress on aquatic organisms. The predation threats can affect the physiology of prey species, thereby changing their tolerance to other stressors such as temperature , and contaminants. − However, ecological risk assessments of warming − and pollutants on wildlife have largely ignored the role of biotic interaction in shaping the vulnerability of species to abiotic stressors.…”

Section: Introductionmentioning

confidence: 99%

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Changes in the Magnitude of the Individual and Combined Effects of Contaminants, Warming, and Predators on Tropical Cladocerans across 11 Generations

Pham

Dinh

Nguyen

et al. 2020

Environ. Sci. Technol.

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A massive challenge in ecotoxicology is assessing how the interaction of contaminants, climate change, and biotic stressors shapes the structure and functions of natural populations. Furthermore, it is not known whether contemporary evolutionary responses to multiple stressors across multigenerations may alter the interaction of these stressors. To address these issues, we exposed Moina dubia to lead (Pb, 50 μg/L) under two temperatures (25 and 28 °C) with/without predator cues from climbing perch (Anabas testudineus) for 11 generations (F1–F11). We assessed changes in M. dubia fitness, including development time, adult size, lifespan, fecundity, and neonate production. We found strong negative effects of Pb, elevated temperature, and predator cues on the fitness of M. dubia. Strikingly, Pb-induced reduction in the performance of M. dubia was stronger at 25 °C and in the absence of predator cues. The individual and interactive effects of Pb, temperature, and predator cues on M. dubia were stronger across F1–F9 and generally leveled off in F10–F11. Our results highlight the high vulnerability of M. dubia to multiple stressors, thus weakening top-down control on algal blooms in eutrophic lakes. Our study underscores the importance of integrating evolutionary responses in realistic ecotoxicological risk assessments of contaminants interacting with climatic and biotic stressors.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Changes in the Magnitude of the Individual and Combined Effects of Contaminants, Warming, and Predators on Tropical Cladocerans across 11 Generations

Pham

Dinh

Nguyen

et al. 2020

Environ. Sci. Technol.

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“…In nature, food shortages are periodically widespread (Metcalfe and Monaghan, 2001), generally related to the seasonal variations in the abundance of prey species (Cohen et al, 2018). Food shortages may be more severe during MHWs as MHWs can impair the productivity of key prey species for marine fish such as copepods (Davis, 1985; Doan et al, 2019; Truong et al, 2020). Therefore, it is highly relevant to assess how food limitation may interact with MHWs and coastal pollutants such as Cu to affect coastal marine species.…”

Section: Introductionmentioning

confidence: 99%

Direct and delayed synergistic effects of marine heatwaves, metals and food limitation on tropical reef-associated fish larvae

Dinh

et al. 2022

Preprint

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Tropical fish are fast-growing and high energetic-demand organisms, which can be highly vulnerable to long-lasting effects of heat stress and pollution, particularly under food shortages. We tested this by assessing highly complex direct and delayed interactive effects of an extreme temperature (32°C) from a simulated marine heatwave (MHW), copper (Cu, 0, 100, 150 and 175 micro g L-1) and food availability (limited and saturated food) on larvae of a tropical, reef-associated seaperch (Psammoperca waigiensis). Cu, MHW, and food limitation independently reduced survival and growth, partly explained by reduced feeding. The negative effect of Cu on fish survival was more substantial under MHW, particularly under limited food. Delayed interactive effects of Cu, MHW, and food limitation were still lethal to fish larvae during the post-exposure period. These results indicate that reef-associated fish larvae are highly vulnerable to these dominant stressors, impairing their ecological function as predators in the coral reefs.

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Facilitation of animals is stronger during summer marine heatwaves and around morphologically complex foundation species

Montie,

Thomsen

2023

Ecology and Evolution

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Foundation species create biogenic habitats, modify environmental conditions, augment biodiversity, and control animal community structures. In recent decades, marine heatwaves (MHWs) have affected the ecology of foundation species worldwide, and perhaps also their associated animal communities. However, no realistic field experiment has tested how MHWs affect animals that live in and around these foundation species. We therefore tested, in a four‐factorial field experiment, if colonisation by small mobile marine animals (epifauna) onto plates with attached single versus co‐occurring foundation species of different morphological complexities, were affected by 3–5°C heating (that mirrored a recent extreme MHW in the study area) and if the heating effect on the epifauna varied within and between seasons. For this experiment mimics of turf seaweed represented the single foundation species and holdfasts of seven common canopy‐forming seaweed represented the co‐occurring foundation species with different morphological complexities. We found that the taxonomic richness and total abundance of epifauna, dominated by copepods, generally were higher on heated plates with complex seaweed holdfasts in warmer summer trials. Furthermore, several interactions between test‐factors were significant, e.g., epifaunal abundances, were, across taxonomic groups, generally higher in warmer than colder summer trials. These results suggest that, in temperate ecosystems, small, mobile, short‐lived, and fast‐growing marine epifauna can be facilitated by warmer oceans and morphologically complex foundation species, implying that future MHWs may increase secondary production and trophic transfers between primary producers and fish. Future studies should test whether these results can be scaled to other ecological species‐interactions, across latitudes and biogeographical regions, and if similar results are found after longer MHWs or within live foundation species under real MHW conditions.

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Predator cues increase negative effects of a simulated marine heatwave on tropical zooplankton

Cited by 20 publications

References 67 publications

Changes in the Magnitude of the Individual and Combined Effects of Contaminants, Warming, and Predators on Tropical Cladocerans across 11 Generations

Changes in the Magnitude of the Individual and Combined Effects of Contaminants, Warming, and Predators on Tropical Cladocerans across 11 Generations

Direct and delayed synergistic effects of marine heatwaves, metals and food limitation on tropical reef-associated fish larvae

Facilitation of animals is stronger during summer marine heatwaves and around morphologically complex foundation species

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