For flux's sake: General considerations for energy‐flux calculations in ecological communities

Eisenhauer, Nico; Barnes, Andrew D.; Brose, Ulrich; Gauzens, Benoît; Sünnemann, Marie; Amyntas, Angelos; Eisenhauer, Nico

doi:10.1002/ece3.8060

Cited by 19 publications

(10 citation statements)

References 111 publications

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“…The main assumption of this approach is the system's equilibrium or steady state (Barnes et al, 2018 ), implying that the total amount of energy lost by a species, either by predation or physiological processes, is exactly compensated by the metabolized energy it gains from consumption. That is, species loss to predation and metabolism are completely balanced by energetic gains, which are defined as incoming fluxes multiplied by assimilation efficiencies (Jochum et al, 2021 ).…”

Section: Methodsmentioning

confidence: 99%

Impacts of extreme climatic events on trophic network complexity and multidimensional stability

Polazzo

Hermann

Minaglia

et al. 2023

Ecology

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Untangling the relationship between network complexity and ecological stability under climate change is an arduous challenge for theoretical and empirical ecology. Even more so, when considering extreme climatic events. Here, we studied the effects of extreme climatic events (heatwaves) on the complexity of realistic freshwater ecosystems using topological and quantitative trophic network metrics. Next, we linked changes in network complexity with the investigation of four stability components (temporal stability, resistance, resilience, and recovery) of community's functional, compositional, and energy flux stability. We found reduction in topological network complexity to be correlated with reduction of functional and compositional resistance.However, temperature-driven increase in link-weighted network complexity increased functional and energy flux recovery and resilience, but at the cost of increased compositional instability. Overall, we propose an overarching approach to elucidate the effects of climate change on multidimensional stability through the lens of network complexity, providing helpful insights for preserving ecosystems stability under climate change.

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Section: Methodsmentioning

confidence: 99%

Impacts of extreme climatic events on trophic network complexity and multidimensional stability

Polazzo

Hermann

Minaglia

et al. 2023

Ecology

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“…Such an approach assumes the system’s equilibrium or steady state, implying that the total amount of energy lost by a species, either by consumption or physiological processes, is exactly compensated by the metabolized energy it gains from consumption. This means that each species loss to predation and metabolism is balanced by its energetic gains, which are defined as incoming fluxes multiplied by assimilation efficiencies ( 64 ). For instance, to calculate energy flux from a food chain (i.e., species A is eaten by species B, which is consumed by species C), we start from the top predator (species C in the food chain) and assess how much energy this species needs.…”

Section: Methodsmentioning

confidence: 99%

“…This loss to consumption is then added to the energy demand of the prey species itself (species B) to represent the joint energy loss of this species that needs to be compensated by the next-lower level (species A), and so on. Therefore, top predators (species without predators) only have metabolic losses, while their prey, the herbivores, have both losses due to metabolism and consumption ( 64 ). The interaction-strength calculations in a food chain or food web begin from the top predator.…”

Section: Methodsmentioning

confidence: 99%

Food web rewiring drives long-term compositional differences and late-disturbance interactions at the community level

Polazzo

Marina

Minaglia

et al. 2022

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

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Significance Multiple anthropogenic disturbances affect the structure and functioning of communities. Recent evidence highlighted that, after pulse disturbance, the functioning a community performs may be recovered fast due to functional redundancy, whereas community multivariate composition needs a longer time. Yet, the mechanisms that drive the different community recovery times have not been quantified empirically. We use quantitative food-web analysis to assess the influence of species interactions on community recovery. We found species-interactions strength to be the main mechanism driving differences between structural and functional recovery. Additionally, we show that interactions between multiple disturbances appear in the long term only when both species-interaction strength and food-web architecture change significantly.

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“…the weight of an individual) and abundances (no. of individuals per unit area) across species (De Ruiter et al 1995, Neutel et al 2002, Barnes et al 2016, 2018, Jochum et al 2021a). Therefore, fluctuations in the community composition and species' relative densities in soil communities affect the flux of energy through the trophic levels (Schwarz et al 2017) and, consequently, trophic multifunctionality (Potapov et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Environmental drivers of local abundance–mass scaling in soil animal communities

Antunes

Gauzens

Brose

et al. 2022

Oikos

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The relationship between species' body masses and densities is strongly conserved around a three-quarter power law when pooling data across communities. However, studies of local within-community relationships have revealed major deviations from this general pattern, which has profound implications for their stability and functioning. Despite multiple contributions of soil communities to people, there is limited knowledge on the drivers of body mass-abundance relationships in these communities. We compiled a dataset comprising 155 soil-animal communities across four countries (Canada, Germany, Indonesia, USA), all sampled using the same methodology. We tested if variation in local climatic and edaphic conditions drives differences in local body mass-abundance scaling relationships. We found substantial variation in the slopes of this power-law relationship across local communities. Structural equation modeling showed that soil temperature and water content have a positive and negative net effect, respectively, on soil communities. These effects are mediated by changes in local edaphic conditions (soil pH and carbon content) and the body-mass range of the communities. These results highlight ways in which alterations of soil climatic and edaphic conditions interactively impact the distribution of abundance between populations of small and large animals. These quantitative mechanistic relationships facilitate our understanding of how global changes in environmental conditions, such as temperature and precipitation, will affect community-abundance distributions and thus the stability and functioning of soil-animal communities.

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For flux's sake: General considerations for energy‐flux calculations in ecological communities

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 19 publications

References 111 publications

Impacts of extreme climatic events on trophic network complexity and multidimensional stability

Impacts of extreme climatic events on trophic network complexity and multidimensional stability

Food web rewiring drives long-term compositional differences and late-disturbance interactions at the community level

Environmental drivers of local abundance–mass scaling in soil animal communities

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