Temperature variability alters the stability and thresholds for collapse of interacting species

Dee, Laura E.; Okamtoto, Daniel; Gårdmark, Anna; Montoya, José M.; Miller, Steve

doi:10.1098/rstb.2019.0457

Cited by 27 publications

(23 citation statements)

References 67 publications

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“…Including optimum-type temperature responses in community models requires assumptions on the location of species-specific optima, and their distance to arbitrary reference temperatures, adding complexity without necessarily providing generality (Dee et al 2020). We find that the processes important for changes in community composition with warming hold for a large part of an optimum-type temperature response curve (i.e.…”

Section: Discussionmentioning

confidence: 92%

Effects of Warming on Intraguild Predator Communities with Ontogenetic Diet Shifts

Thunell

Lindmark

Huss

et al. 2021

The American Naturalist

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Species interactions mediate how warming affects community composition via individual growth and population size structure. While predictions on how warming affects composition of size-or stagestructured communities have so far focused on linear (food chain) communities, mixed competitionpredation interactions, such as intraguild predation are common. Intraguild predation often results from changes in diet over ontogeny ('ontogenetic diet-shifts') and strongly affects community composition and dynamics. Here we study how warming affects a community of intraguild predators with ontogenetic dietshifts, consumers and shared prey by analyzing a stage-structured bioenergetics multispecies model with temperature-and body size-dependent individual-level rates. We find that warming can strengthen competition and decrease predation, leading to a loss of a cultivation mechanism (the feedback between predation on, and competition with, consumers exerted by predators), and ultimately predator collapse. Furthermore, we show that the effect of warming on community composition depends on the extent of the ontogenetic diet-shift and that warming can cause a sequence of community reconfigurations in species with partial diet-shifts. Our findings contrast previous predictions concerning individual growth of predators and the mechanisms behind predator loss in warmer environments, and highlight how feedbacks between temperature and intraspecific size-structure are important for understanding such effects on community composition.

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Section: Discussionmentioning

confidence: 92%

Effects of Warming on Intraguild Predator Communities with Ontogenetic Diet Shifts

Thunell

Lindmark

Huss

et al. 2021

The American Naturalist

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“…This was due to non-linear averaging of thermal tolerances. Indeed, because phytoplankton species were in the concave part of their thermal tolerance curve, the time-averaged tolerance in fluctuating conditions was lower than the tolerance at a constant average temperature (61,62). Further, the biodiversityecosystem functioning slope was steeper over longer timescales in the moderate and severe thermal fluctuation treatment.…”

Section: Discussionmentioning

confidence: 97%

Phytoplankton biodiversity is more important for ecosystem functioning in highly variable thermal environments

Bestion

Haegeman

Codesal

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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The 21st century has seen an acceleration of anthropogenic climate change and biodiversity loss, with both stressors deemed to affect ecosystem functioning. However, we know little about the interactive effects of both stressors and in particular about the interaction of increased climatic variability and biodiversity loss on ecosystem functioning. This should be remedied because larger climatic variability is one of the main features of climate change. Here, we demonstrated that temperature fluctuations led to changes in the importance of biodiversity for ecosystem functioning. We used microcosm communities of different phytoplankton species richness and exposed them to a constant, mild, and severe temperature-fluctuating environment. Wider temperature fluctuations led to steeper biodiversity–ecosystem functioning slopes, meaning that species loss had a stronger negative effect on ecosystem functioning in more fluctuating environments. For severe temperature fluctuations, the slope increased through time due to a decrease of the productivity of species-poor communities over time. We developed a theoretical competition model to better understand our experimental results and showed that larger differences in thermal tolerances across species led to steeper biodiversity–ecosystem functioning slopes. Species-rich communities maintained their ecosystem functioning with increased fluctuation as they contained species able to resist the thermally fluctuating environments, while this was on average not the case in species-poor communities. Our results highlight the importance of biodiversity for maintaining ecosystem functions and services in the context of increased climatic variability under climate change.

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“…The theoretical underpinning of these ideas is at the core of §3 'From theory to prediction,' where we feature different types of models. Dee et al [58] model temperature-dependent predator-prey dynamics and find that including temperature variability (compared to constant or constantly warming temperatures) alters interacting multispecies assemblages with a multitude of potential outcomes, from predator royalsocietypublishing.org/journal/rstb Phil. Trans.…”

Section: Contributions To This Issuementioning

confidence: 99%

Integrative research perspectives on marine conservation

Hillebrand

Jacob

Leslie

2020

Phil. Trans. R. Soc. B

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Whereas the conservation and management of biodiversity has become a key issue in environmental sciences and policy in general, the conservation of marine biodiversity faces additional challenges such as the challenges of accessing field sites (e.g. polar, deep sea), knowledge gaps regarding biodiversity trends, high mobility of many organisms in fluid environments, and ecosystem-specific obstacles to stakeholder engagement and governance. This issue comprises contributions from a diverse international group of scientists in a benchmarking volume for a common research agenda on marine conservation. We begin by addressing information gaps on marine biodiversity trends through novel approaches and technologies, then linking such information to ecosystem functioning through a focus on traits. We then leverage the knowledge of these relationships to inform theory aiming at predicting the future composition and functioning of marine communities. Finally, we elucidate the linkages between marine ecosystems and human societies by examining economic, management and governance approaches that contribute to effective marine conservation in practice. This article is part of the theme issue ‘Integrative research perspectives on marine conservation’.

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Temperature variability alters the stability and thresholds for collapse of interacting species

Cited by 27 publications

References 67 publications

Effects of Warming on Intraguild Predator Communities with Ontogenetic Diet Shifts

Effects of Warming on Intraguild Predator Communities with Ontogenetic Diet Shifts

Phytoplankton biodiversity is more important for ecosystem functioning in highly variable thermal environments

Integrative research perspectives on marine conservation

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