The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Danielle L. Dixson - One of the best experts on this subject based on the ideXlab platform.
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Intertidal crustaceans use seaweed-derived chemical cues to mitigate predation risk
Behavioral Ecology and Sociobiology, 2017Co-Authors: Rohan M. Brooker, Danielle L. DixsonAbstract:As predation is a primary driver of mortality, the need to minimize predation risk can shape prey behavior, influencing habitat selection and investment in vigilance. As structurally complex habitats can reduce predation risk, prey within heterogeneous environments may have evolved sensory abilities to locate them. In temperate rocky intertidal systems, fucoid seaweeds are a main source of structural complexity and can provide shelter for small organisms. This study examined the effects of predation risk on habitat selection in a Tide Pool-dwelling shrimp, Palaemon affinis , specifically testing whether predation risk drives preferences for fucoid seaweeds and if shrimps use chemical cues to locate fucoid-rich habitats. While Tide Pools with and without fucoids were equally abundant, P. affinis densities were >3 times higher in Pools containing fucoids. The relationship between P. affinis and fucoids appears to be related to predation risk with P. affinis exhibiting a preference for fucoid microhabitats when a potential predator was present. Shrimps could distinguish between olfactory signatures from Tide Pools with and without fucoids and the odor of fucoids from other marine algae, suggesting that chemical cues are used to identify these structurally complex habitats. In addition to reducing predation risk, fucoid-rich habitats may provide better access to essential resources and reduce exposure to other biotic and abiotic stressors. This study shows that prey organisms can rapidly modify habitat use based on ambient predation risk, with olfactory cues used to identify the shelter characteristics of different habitats. Significance statement Predation is the major source of mortality for most animal species. For this reason, animals may have evolved ways to minimize predation risk by modifying their behavior. In this study, we show that small Tide Pool-dwelling shrimps modify their habitat use in response to predators, using chemical cues to locate and identify structurally complex habitats that could reduce predation risk when this risk is high.
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Intertidal crustaceans use seaweed-derived chemical cues to mitigate predation risk
Behavioral Ecology and Sociobiology, 2017Co-Authors: Rohan M. Brooker, Danielle L. DixsonAbstract:As predation is a primary driver of mortality, the need to minimize predation risk can shape prey behavior, influencing habitat selection and investment in vigilance. As structurally complex habitats can reduce predation risk, prey within heterogeneous environments may have evolved sensory abilities to locate them. In temperate rocky intertidal systems, fucoid seaweeds are a main source of structural complexity and can provide shelter for small organisms. This study examined the effects of predation risk on habitat selection in a Tide Pool-dwelling shrimp, Palaemon affinis, specifically testing whether predation risk drives preferences for fucoid seaweeds and if shrimps use chemical cues to locate fucoid-rich habitats. While Tide Pools with and without fucoids were equally abundant, P. affinis densities were >3 times higher in Pools containing fucoids. The relationship between P. affinis and fucoids appears to be related to predation risk with P. affinis exhibiting a preference for fucoid microhabitats when a potential predator was present. Shrimps could distinguish between olfactory signatures from Tide Pools with and without fucoids and the odor of fucoids from other marine algae, suggesting that chemical cues are used to identify these structurally complex habitats. In addition to reducing predation risk, fucoid-rich habitats may provide better access to essential resources and reduce exposure to other biotic and abiotic stressors. This study shows that prey organisms can rapidly modify habitat use based on ambient predation risk, with olfactory cues used to identify the shelter characteristics of different habitats. Predation is the major source of mortality for most animal species. For this reason, animals may have evolved ways to minimize predation risk by modifying their behavior. In this study, we show that small Tide Pool-dwelling shrimps modify their habitat use in response to predators, using chemical cues to locate and identify structurally complex habitats that could reduce predation risk when this risk is high.
Rohan M. Brooker - One of the best experts on this subject based on the ideXlab platform.
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Intertidal crustaceans use seaweed-derived chemical cues to mitigate predation risk
Behavioral Ecology and Sociobiology, 2017Co-Authors: Rohan M. Brooker, Danielle L. DixsonAbstract:As predation is a primary driver of mortality, the need to minimize predation risk can shape prey behavior, influencing habitat selection and investment in vigilance. As structurally complex habitats can reduce predation risk, prey within heterogeneous environments may have evolved sensory abilities to locate them. In temperate rocky intertidal systems, fucoid seaweeds are a main source of structural complexity and can provide shelter for small organisms. This study examined the effects of predation risk on habitat selection in a Tide Pool-dwelling shrimp, Palaemon affinis , specifically testing whether predation risk drives preferences for fucoid seaweeds and if shrimps use chemical cues to locate fucoid-rich habitats. While Tide Pools with and without fucoids were equally abundant, P. affinis densities were >3 times higher in Pools containing fucoids. The relationship between P. affinis and fucoids appears to be related to predation risk with P. affinis exhibiting a preference for fucoid microhabitats when a potential predator was present. Shrimps could distinguish between olfactory signatures from Tide Pools with and without fucoids and the odor of fucoids from other marine algae, suggesting that chemical cues are used to identify these structurally complex habitats. In addition to reducing predation risk, fucoid-rich habitats may provide better access to essential resources and reduce exposure to other biotic and abiotic stressors. This study shows that prey organisms can rapidly modify habitat use based on ambient predation risk, with olfactory cues used to identify the shelter characteristics of different habitats. Significance statement Predation is the major source of mortality for most animal species. For this reason, animals may have evolved ways to minimize predation risk by modifying their behavior. In this study, we show that small Tide Pool-dwelling shrimps modify their habitat use in response to predators, using chemical cues to locate and identify structurally complex habitats that could reduce predation risk when this risk is high.
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Intertidal crustaceans use seaweed-derived chemical cues to mitigate predation risk
Behavioral Ecology and Sociobiology, 2017Co-Authors: Rohan M. Brooker, Danielle L. DixsonAbstract:As predation is a primary driver of mortality, the need to minimize predation risk can shape prey behavior, influencing habitat selection and investment in vigilance. As structurally complex habitats can reduce predation risk, prey within heterogeneous environments may have evolved sensory abilities to locate them. In temperate rocky intertidal systems, fucoid seaweeds are a main source of structural complexity and can provide shelter for small organisms. This study examined the effects of predation risk on habitat selection in a Tide Pool-dwelling shrimp, Palaemon affinis, specifically testing whether predation risk drives preferences for fucoid seaweeds and if shrimps use chemical cues to locate fucoid-rich habitats. While Tide Pools with and without fucoids were equally abundant, P. affinis densities were >3 times higher in Pools containing fucoids. The relationship between P. affinis and fucoids appears to be related to predation risk with P. affinis exhibiting a preference for fucoid microhabitats when a potential predator was present. Shrimps could distinguish between olfactory signatures from Tide Pools with and without fucoids and the odor of fucoids from other marine algae, suggesting that chemical cues are used to identify these structurally complex habitats. In addition to reducing predation risk, fucoid-rich habitats may provide better access to essential resources and reduce exposure to other biotic and abiotic stressors. This study shows that prey organisms can rapidly modify habitat use based on ambient predation risk, with olfactory cues used to identify the shelter characteristics of different habitats. Predation is the major source of mortality for most animal species. For this reason, animals may have evolved ways to minimize predation risk by modifying their behavior. In this study, we show that small Tide Pool-dwelling shrimps modify their habitat use in response to predators, using chemical cues to locate and identify structurally complex habitats that could reduce predation risk when this risk is high.
Catarina Vinagre - One of the best experts on this subject based on the ideXlab platform.
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What's in a Tide Pool? Just as much food web network complexity as in large open ecosystems.
PloS one, 2018Co-Authors: Vanessa Mendonça, Carolina Madeira, Marta Dias, Augusto A V Flores, Fanny Vermandele, Philippe Archambault, Awantha Dissanayake, João Canning-clode, Ana C. F. Silva, Catarina VinagreAbstract:Understanding the fundamental laws that govern complex food web networks over large ecosystems presents high costs and oftentimes unsurmountable logistical challenges. This way, it is crucial to find smaller systems that can be used as proxy food webs. Intertidal rock Pool environments harbour particularly high biodiversity over small areas. This study aimed to analyse their food web networks to investigate their potential as proxies of larger ecosystems for food web networks research. Highly resolved food webs were compiled for 116 intertidal rock Pools from cold, temperate, subtropical and tropical regions, to ensure a wide representation of environmental variability. The network properties of these food webs were compared to that of estuaries, lakes and rivers, as well as marine and terrestrial ecosystems (46 previously published complex food webs). The intertidal rock Pool food webs analysed presented properties that were in the same range as the previously published food webs. The niche model predictive success was remarkably high (73-88%) and similar to that previously found for much larger marine and terrestrial food webs. By using a large-scale sampling effort covering 116 intertidal rock Pools in several biogeographic regions, this study showed, for the first time, that intertidal rock Pools encompass food webs that share fundamental organizational characteristics with food webs from markedly different, larger, open and abiotically stable ecosystems. As small, self-contained habitats, intertidal rock Pools are particularly tractable systems and therefore a large number of food webs can be examined with relatively low sampling effort. This study shows, for the first time that they can be useful models for the understanding of universal processes that regulate the complex network organization of food webs, which are harder or impossible to investigate in larger, open ecosystems, due to high costs and logistical difficulties.
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ecological traps in shallow coastal waters potential effect of heat waves in tropical and temperate organisms
PLOS ONE, 2018Co-Authors: Catarina Vinagre, Vanessa Mendonça, Rui Cereja, Francisca Abreuafonso, Marta Dias, Damian Mizrahi, Augusto A V FloresAbstract:Mortality of fish has been reported in Tide Pools during warm days. That means that Tide Pools are potential ecological traps for coastal organisms, which happen when environmental changes cause maladaptive habitat selection. Heat-waves are predicted to increase in intensity, duration and frequency, making it relevant to investigate the role of Tide Pools as traps for coastal organisms. However, heat waves can also lead to acclimatization. If organisms undergo acclimatization prior to being trapped in Tide Pools, their survival chances may increase. Common Tide Pool species (46 species in total) were collected at a tropical and a temperate area and their upper thermal limits estimated. They were maintained for 10 days at their mean summer sea surface temperature +3°C, mimicking a heat-wave. Their upper thermal limits were estimated again, after this acclimation period, to calculate each species’ acclimation response. The upper thermal limits of the organisms were compared to the temperatures attained by Tide Pool waters to investigate if 1) Tide Pools could be considered ecological traps and 2) if the increase in upper thermal limits elicited by the acclimation period could make the organisms less vulnerable to this threat. Tropical Tide Pools were found to be ecological traps for an important number of common coastal species, given that they can attain temperatures higher than the upper thermal limits of most of those species. Tide Pools are not ecological traps in temperate zones. Tropical species have higher thermal limits than temperate species, but lower acclimation response, that does not allow them to survive the maximum habitat temperature of tropical Tide Pools. This way, tropical coastal organisms seem to be, not only more vulnerable to climate warming per se, but also to an increase in the ecological trap effect of Tide Pools.
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Warming in shallow waters: Seasonal response of stress biomarkers in a Tide Pool fish
Estuarine Coastal and Shelf Science, 1Co-Authors: Catarina Vinagre, Diana Madeira, Vanessa Mendonça, Carolina Madeira, Mário DinizAbstract:Abstract Tide Pools are rapidly warming environments with low thermal inertia, where organisms are exposed to potentially stressful conditions. This way, Tide Pools will be among the first and hardest hit environments by climate warming. Studies of thermal stress in situ are rare, but important so that current thermal stress in the wild can be confirmed and serve as reference for the future. This study aims to investigate the seasonal response of stress biomarkers in a common Tide Pool fish, the blenny Lipophrys trigloides, under natural conditions, in situ. Multiple biomarkers of thermal and oxidative stress were analysed in the tissues of the muscle, visceral mass, gills and brain of L. trigloides, under spring (18.50 ± 0.71 °C) and summer conditions (28.30 ± 1.30 °C), in order to assess tissue-specific seasonal responses to the rapid warming that occurs seasonally in Tide Pools. It was concluded that L. trigloides seems to be setting in motion relevant thermal stress and antioxidant defences under summer conditions. All tissues analysed were responsive and all biomarkers of thermal and oxidative stress increased in summer conditions, with the exception of SOD, which presented no alterations. The present study offers reference values that will be useful for future comparison during particularly warm summers and in future years as climate warming progresses.
Augusto A V Flores - One of the best experts on this subject based on the ideXlab platform.
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What's in a Tide Pool? Just as much food web network complexity as in large open ecosystems.
PloS one, 2018Co-Authors: Vanessa Mendonça, Carolina Madeira, Marta Dias, Augusto A V Flores, Fanny Vermandele, Philippe Archambault, Awantha Dissanayake, João Canning-clode, Ana C. F. Silva, Catarina VinagreAbstract:Understanding the fundamental laws that govern complex food web networks over large ecosystems presents high costs and oftentimes unsurmountable logistical challenges. This way, it is crucial to find smaller systems that can be used as proxy food webs. Intertidal rock Pool environments harbour particularly high biodiversity over small areas. This study aimed to analyse their food web networks to investigate their potential as proxies of larger ecosystems for food web networks research. Highly resolved food webs were compiled for 116 intertidal rock Pools from cold, temperate, subtropical and tropical regions, to ensure a wide representation of environmental variability. The network properties of these food webs were compared to that of estuaries, lakes and rivers, as well as marine and terrestrial ecosystems (46 previously published complex food webs). The intertidal rock Pool food webs analysed presented properties that were in the same range as the previously published food webs. The niche model predictive success was remarkably high (73-88%) and similar to that previously found for much larger marine and terrestrial food webs. By using a large-scale sampling effort covering 116 intertidal rock Pools in several biogeographic regions, this study showed, for the first time, that intertidal rock Pools encompass food webs that share fundamental organizational characteristics with food webs from markedly different, larger, open and abiotically stable ecosystems. As small, self-contained habitats, intertidal rock Pools are particularly tractable systems and therefore a large number of food webs can be examined with relatively low sampling effort. This study shows, for the first time that they can be useful models for the understanding of universal processes that regulate the complex network organization of food webs, which are harder or impossible to investigate in larger, open ecosystems, due to high costs and logistical difficulties.
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ecological traps in shallow coastal waters potential effect of heat waves in tropical and temperate organisms
PLOS ONE, 2018Co-Authors: Catarina Vinagre, Vanessa Mendonça, Rui Cereja, Francisca Abreuafonso, Marta Dias, Damian Mizrahi, Augusto A V FloresAbstract:Mortality of fish has been reported in Tide Pools during warm days. That means that Tide Pools are potential ecological traps for coastal organisms, which happen when environmental changes cause maladaptive habitat selection. Heat-waves are predicted to increase in intensity, duration and frequency, making it relevant to investigate the role of Tide Pools as traps for coastal organisms. However, heat waves can also lead to acclimatization. If organisms undergo acclimatization prior to being trapped in Tide Pools, their survival chances may increase. Common Tide Pool species (46 species in total) were collected at a tropical and a temperate area and their upper thermal limits estimated. They were maintained for 10 days at their mean summer sea surface temperature +3°C, mimicking a heat-wave. Their upper thermal limits were estimated again, after this acclimation period, to calculate each species’ acclimation response. The upper thermal limits of the organisms were compared to the temperatures attained by Tide Pool waters to investigate if 1) Tide Pools could be considered ecological traps and 2) if the increase in upper thermal limits elicited by the acclimation period could make the organisms less vulnerable to this threat. Tropical Tide Pools were found to be ecological traps for an important number of common coastal species, given that they can attain temperatures higher than the upper thermal limits of most of those species. Tide Pools are not ecological traps in temperate zones. Tropical species have higher thermal limits than temperate species, but lower acclimation response, that does not allow them to survive the maximum habitat temperature of tropical Tide Pools. This way, tropical coastal organisms seem to be, not only more vulnerable to climate warming per se, but also to an increase in the ecological trap effect of Tide Pools.
Vanessa Mendonça - One of the best experts on this subject based on the ideXlab platform.
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What's in a Tide Pool? Just as much food web network complexity as in large open ecosystems.
PloS one, 2018Co-Authors: Vanessa Mendonça, Carolina Madeira, Marta Dias, Augusto A V Flores, Fanny Vermandele, Philippe Archambault, Awantha Dissanayake, João Canning-clode, Ana C. F. Silva, Catarina VinagreAbstract:Understanding the fundamental laws that govern complex food web networks over large ecosystems presents high costs and oftentimes unsurmountable logistical challenges. This way, it is crucial to find smaller systems that can be used as proxy food webs. Intertidal rock Pool environments harbour particularly high biodiversity over small areas. This study aimed to analyse their food web networks to investigate their potential as proxies of larger ecosystems for food web networks research. Highly resolved food webs were compiled for 116 intertidal rock Pools from cold, temperate, subtropical and tropical regions, to ensure a wide representation of environmental variability. The network properties of these food webs were compared to that of estuaries, lakes and rivers, as well as marine and terrestrial ecosystems (46 previously published complex food webs). The intertidal rock Pool food webs analysed presented properties that were in the same range as the previously published food webs. The niche model predictive success was remarkably high (73-88%) and similar to that previously found for much larger marine and terrestrial food webs. By using a large-scale sampling effort covering 116 intertidal rock Pools in several biogeographic regions, this study showed, for the first time, that intertidal rock Pools encompass food webs that share fundamental organizational characteristics with food webs from markedly different, larger, open and abiotically stable ecosystems. As small, self-contained habitats, intertidal rock Pools are particularly tractable systems and therefore a large number of food webs can be examined with relatively low sampling effort. This study shows, for the first time that they can be useful models for the understanding of universal processes that regulate the complex network organization of food webs, which are harder or impossible to investigate in larger, open ecosystems, due to high costs and logistical difficulties.
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ecological traps in shallow coastal waters potential effect of heat waves in tropical and temperate organisms
PLOS ONE, 2018Co-Authors: Catarina Vinagre, Vanessa Mendonça, Rui Cereja, Francisca Abreuafonso, Marta Dias, Damian Mizrahi, Augusto A V FloresAbstract:Mortality of fish has been reported in Tide Pools during warm days. That means that Tide Pools are potential ecological traps for coastal organisms, which happen when environmental changes cause maladaptive habitat selection. Heat-waves are predicted to increase in intensity, duration and frequency, making it relevant to investigate the role of Tide Pools as traps for coastal organisms. However, heat waves can also lead to acclimatization. If organisms undergo acclimatization prior to being trapped in Tide Pools, their survival chances may increase. Common Tide Pool species (46 species in total) were collected at a tropical and a temperate area and their upper thermal limits estimated. They were maintained for 10 days at their mean summer sea surface temperature +3°C, mimicking a heat-wave. Their upper thermal limits were estimated again, after this acclimation period, to calculate each species’ acclimation response. The upper thermal limits of the organisms were compared to the temperatures attained by Tide Pool waters to investigate if 1) Tide Pools could be considered ecological traps and 2) if the increase in upper thermal limits elicited by the acclimation period could make the organisms less vulnerable to this threat. Tropical Tide Pools were found to be ecological traps for an important number of common coastal species, given that they can attain temperatures higher than the upper thermal limits of most of those species. Tide Pools are not ecological traps in temperate zones. Tropical species have higher thermal limits than temperate species, but lower acclimation response, that does not allow them to survive the maximum habitat temperature of tropical Tide Pools. This way, tropical coastal organisms seem to be, not only more vulnerable to climate warming per se, but also to an increase in the ecological trap effect of Tide Pools.
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Warming in shallow waters: Seasonal response of stress biomarkers in a Tide Pool fish
Estuarine Coastal and Shelf Science, 1Co-Authors: Catarina Vinagre, Diana Madeira, Vanessa Mendonça, Carolina Madeira, Mário DinizAbstract:Abstract Tide Pools are rapidly warming environments with low thermal inertia, where organisms are exposed to potentially stressful conditions. This way, Tide Pools will be among the first and hardest hit environments by climate warming. Studies of thermal stress in situ are rare, but important so that current thermal stress in the wild can be confirmed and serve as reference for the future. This study aims to investigate the seasonal response of stress biomarkers in a common Tide Pool fish, the blenny Lipophrys trigloides, under natural conditions, in situ. Multiple biomarkers of thermal and oxidative stress were analysed in the tissues of the muscle, visceral mass, gills and brain of L. trigloides, under spring (18.50 ± 0.71 °C) and summer conditions (28.30 ± 1.30 °C), in order to assess tissue-specific seasonal responses to the rapid warming that occurs seasonally in Tide Pools. It was concluded that L. trigloides seems to be setting in motion relevant thermal stress and antioxidant defences under summer conditions. All tissues analysed were responsive and all biomarkers of thermal and oxidative stress increased in summer conditions, with the exception of SOD, which presented no alterations. The present study offers reference values that will be useful for future comparison during particularly warm summers and in future years as climate warming progresses.