Species interactions under climate change: connecting kinetic effects of temperature on individuals to community dynamics

Boukal, David S.; Bideault, Azenor; Carreira, Bruno M.; Sentis, Arnaud

doi:10.1016/j.cois.2019.06.014

Cited by 87 publications

(90 citation statements)

References 84 publications

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“…Ongoing climate change is a major threat to biodiversity [1] and ecosystem functioning [2]. Climate warming notably alters community and ecosystem functioning through changes in trophic interactions with consequences for the fitness of all species [1,3,4]. This alteration may result from changes in species compositions in prey communities across trophic levels or from changes in the diet of predators.…”

Section: Introductionmentioning

confidence: 99%

Altered trophic interactions in warming climates: consequences for predator diet breadth and fitness

et al. 2019

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Species interactions are central in predicting the impairment of biodiversity with climate change. Trophic interactions may be altered through climate-dependent changes in either predator food preferences or prey communities. Yet, climate change impacts on predator diets remain surprisingly poorly understood. We experimentally studied the consequences of 2°C-warmer climatic conditions on the trophic niche of a generalist lizard predator. We used a system of semi-natural mesocosms housing a variety of invertebrate species and in which climatic conditions were manipulated. Lizards in warmer climatic conditions ate a greater predatory to phytophagous invertebrate ratio and had smaller individual dietary breadths. These shifts mainly arose from direct impacts of climate on lizard diets rather than from changes in prey communities. Dietary changes were associated with negative changes in fitness-related traits (body condition, gut microbiota) and survival. We demonstrate that climate change alters trophic interactions through top-predator dietary shifts which might disrupt eco-evolutionary dynamics.

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Section: Introductionmentioning

confidence: 99%

Altered trophic interactions in warming climates: consequences for predator diet breadth and fitness

et al. 2019

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“…and alter trophic interactions (Renner and Zohner, 2018;Boukal et al, 2019). Overall, little is known about how climate change will impact the role of consumers on host plants or as prey for predators (Tylianakis et al, 2008;Lurgi et al, 2012).…”

Section: Predicted Species Response and Future Research Directionsmentioning

confidence: 99%

Mountain Ecosystems as Natural Laboratories for Climate Change Experiments

Tito

Vasconcelos

Feeley

2020

Front. For. Glob. Change

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Experimental studies are needed to empirically examine the effects of climate change on terrestrial organisms and to serve as the basis for predictions and management practices. As such, designing and implementing experimental systems that can simulate complex changes in the natural environment is currently a major area of interest of climate change science. Most climate change experiments (e.g., infrared heaters, open-top chambers) are typically performed within small, controlled environments and often manipulate just temperature and/or CO 2 concentration. Other factors are more difficult to control (e.g., wind speed, soil moisture) or are frequently ignored (e.g., biotic interactions), leading to uncertainties in the results and limiting our ability to make realistic predictions about species' responses to future environmental changes. We examined the natural variation of abiotic and biotic factors along mountain elevational gradients in order to highlight the potential for using these systems as natural laboratories for climate change research and experiments. The high variability of different abiotic and biotic factors along elevational gradients provides a good opportunity to carry out field transplant/translocation experiments aimed at answering some critical questions, including: How will new biotic assemblages affect key interactions and processes? What are the factors that influence species assemblages under novel climates? How do local abiotic factors influence the establishment of species migrating into novel and climatically suitable habitats? Based on empirical evidence, we strongly encourage researchers to take advantage of the natural environmental gradients found in mountains to study the potential direct and indirect impacts of climate change on species, communities and biodiversity as a whole.

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“…Biological rates of ectotherm species typically increase exponentially with warming, up to an optimal temperature, above which they decrease due possibly to the denaturation of enzymes and lipid membranes (Boukal et al, 2019;Pörtner & Farrell, 2008).…”

Section: Introductionmentioning

confidence: 99%

Thermal mismatches in biological rates determine trophic control and biomass distribution under warming

Bideault

Galiana

Zelnik

et al. 2020

Global Change Biology

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Temperature has numerous effects on the structure and dynamics of ecological communities. Yet, there is no general trend or consensus on the magnitude and directions of these effects. To fill this gap, we propose a mechanistic framework based on key biological rates that predicts how temperature influences biomass distribution and trophic control in food webs. We show that these predictions arise from thermal mismatches between biological rates and across trophic levels. We couple our theory with experimental data for a wide range of species and find that warming should lead to top‐heavier terrestrial food chains and stronger top‐down control in aquatic environments. We then derive predictions for the effects of temperature on herbivory and validate them with data on stream grazers. Our study provides a mechanistic explanation of thermal effects on consumer–resource systems which is crucial to better understand the biogeography and the consequences of global warming on trophic dynamics.

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Species interactions under climate change: connecting kinetic effects of temperature on individuals to community dynamics

Cited by 87 publications

References 84 publications

Altered trophic interactions in warming climates: consequences for predator diet breadth and fitness

Altered trophic interactions in warming climates: consequences for predator diet breadth and fitness

Mountain Ecosystems as Natural Laboratories for Climate Change Experiments

Thermal mismatches in biological rates determine trophic control and biomass distribution under warming

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