History and Current Development of a Paradigm of Predation in Rocky Intertidal Communities

Robles, Carlos Alejandro; Desharnais, Robert A.

doi:10.2307/3071971

Cited by 23 publications

(41 citation statements)

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“…Pisaster has the ability to incorporate seawater into its coelomic cavity at high tide, and use it to increase thermal inertia at low tide (Pincebourde et al 2009). These accounts, however, do not conform with the analysis from previous studies evaluating the effects of prey addition/removal on the intertidal distribution of Pisaster (Robles et al 1995, Robles andDesharnais 2002). This high thermal inertia in Pisaster may further explain the lack of differences we found between static and mobile predators.…”

Section: Role Of Behaviorcontrasting

confidence: 99%

Thermal sensitivity and the role of behavior in driving an intertidal predator–prey interaction

Monaco

Wethey

Helmuth

2016

Ecological Monographs

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Environmental stress models (ESM) provide a useful framework to study the direct and indirect ecological drivers of community diversity and resilience. ESMs make predictions about the relative importance of structuring processes (e.g., predation) based on the relative stress suffered by consumers and prey. Their practical application, i.e., determining the conditions under which consumers and prey performance is more negatively affected, has been limited because the roles of behavior and physiology are not usually considered. We examined the role of thermal sensitivity and behavior on the thermal performance of the rocky intertidal predator Pisaster ochraceus and its main prey Mytilus californianus. We propose a novel framework that merges thermal performance curves (TPC) with observations of microhabitat use to provide a realistic perspective of the relative physiological conditions of predator and prey. First, by deriving aquatic and aerial TPCs for both species and from two sites, we found differences in parameter values that in some cases correspond to the individuals' origins. Second, we calculated realized thermal performance in the field by combining TPCs with body temperatures recorded with biomimetic sensors. Notably, thermal performance of Pisaster was higher than that for Mytilus (i.e., prey-stress model), contrary to previous expectations based on caging experiments. Third, these estimates of thermal performance corresponded loosely with a measured indicator of overall physiological condition (body mass index, BMI) and a marker for extreme thermal stress (heat-shock proteins 70 kDa), suggesting that environmental drivers other than temperature, such as food supply, must be considered. We found no evidence that Pisaster movement significantly influences thermal performance under typical conditions, suggesting instead that its preference for sheltered microhabitats provides a mechanism for avoiding exposure to extreme environmental conditions. Through the application of TPCs and ESMs, this study provides a unique perspective on the importance of physiology and behavior in driving the sensitivity of species interactions to environmental change. Crucially, this framework allowed clarifying that this system behaves as a prey-instead of consumer-stress model, which may also apply to many other ectotherm species interactions.

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Section: Role Of Behaviorcontrasting

confidence: 99%

Thermal sensitivity and the role of behavior in driving an intertidal predator–prey interaction

Monaco

Wethey

Helmuth

2016

Ecological Monographs

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“…Nevertheless, few studies have examined anthropogenic impacts on intertidal rocky shore assemblages at broad scales, (e.g., [20]–[23]). Most were limited to regional scales including the US west coast (e.g., [23]), United Kingdom [15], Portugal [24], Japan [21], and Mediterranean Sea [16]. Given that strong differences exist among regions in terms of anthropogenic and climate change impacts, e.g., different warming rates [25], [26] and human influence [27], a global-scale approach is warranted.…”

Section: Introductionmentioning

confidence: 99%

Patterns of Spatial Variation of Assemblages Associated with Intertidal Rocky Shores: A Global Perspective

et al. 2010

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Assemblages associated with intertidal rocky shores were examined for large scale distribution patterns with specific emphasis on identifying latitudinal trends of species richness and taxonomic distinctiveness. Seventy-two sites distributed around the globe were evaluated following the standardized sampling protocol of the Census of Marine Life NaGISA project (www.nagisa.coml.org). There were no clear patterns of standardized estimators of species richness along latitudinal gradients or among Large Marine Ecosystems (LMEs); however, a strong latitudinal gradient in taxonomic composition (i.e., proportion of different taxonomic groups in a given sample) was observed. Environmental variables related to natural influences were strongly related to the distribution patterns of the assemblages on the LME scale, particularly photoperiod, sea surface temperature (SST) and rainfall. In contrast, no environmental variables directly associated with human influences (with the exception of the inorganic pollution index) were related to assemblage patterns among LMEs. Correlations of the natural assemblages with either latitudinal gradients or environmental variables were equally strong suggesting that neither neutral models nor models based solely on environmental variables sufficiently explain spatial variation of these assemblages at a global scale. Despite the data shortcomings in this study (e.g., unbalanced sample distribution), we show the importance of generating biological global databases for the use in large-scale diversity comparisons of rocky intertidal assemblages to stimulate continued sampling and analyses.

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“…This focus, bolstered by Gause's (1934) classic laboratory studies of competition in protozoans (see Robles and Desharnais 2002), had two major effects. First, it reaffirmed the belief that the biotic process of competition was the source of regulation, especially given that the Lotka-Volterra predator-prey model was only neutrally stable and that Gause's predator-prey systems usually went extinct.…”

Section: )mentioning

confidence: 99%

Population Regulation: Historical Context and Contemporary Challenges of Open vs. Closed Systems

Hixon¹,

Pacala²,

Sandin³

2002

Ecology

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History and Current Development of a Paradigm of Predation in Rocky Intertidal Communities

Cited by 23 publications

References 0 publications

Thermal sensitivity and the role of behavior in driving an intertidal predator–prey interaction

Thermal sensitivity and the role of behavior in driving an intertidal predator–prey interaction

Patterns of Spatial Variation of Assemblages Associated with Intertidal Rocky Shores: A Global Perspective

Population Regulation: Historical Context and Contemporary Challenges of Open vs. Closed Systems

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