Eric Harvey

Eric Harvey
Université du Québec à Trois-Rivières · Département des Sciences de l'Environnement

Ph.D.

About

51
Publications
10,347
Reads
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787
Citations
Citations since 2016
41 Research Items
759 Citations
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2016201720182019202020212022050100150
2016201720182019202020212022050100150
Introduction
I am a community ecologist with broad interests in meta-community and food web ecology. I seek to understand how perturbations influence biotic communities and functioning, and how those effects in turn propagate at the landscape level.
Additional affiliations
September 2011 - December 2014
University of Guelph
Position
  • PhD Student
September 2009 - September 2011
Université du Québec à Rimouski UQAR
Position
  • Master's Student

Publications

Publications (51)
Article
Full-text available
Ecosystems are linked to neighbouring ecosystems not only by dispersal, but also by the movement of subsidy. Such subsidy couplings between ecosystems have important landscape-scale implications because perturbations in one ecosystem may affect community structure and functioning in neighbouring ecosystems via increased/decreased subsidies. Here, w...
Article
Current approaches to conservation may be inadequate to maintain ecosystem integrity because they are mostly based on rarity status of organisms rather than functional significance. Alternatively, approaches focusing on the protection of ecological networks lead to more appropriate conservation targets to maintain ecosystem integrity. 2.We propose...
Article
Full-text available
Anthropogenic influences on resources and consumers can affect food web regulation, with impacts on trophic structure and ecosystem processes. Identifying how these impacts unfold is challenging because alterations to one or both resources and consumers can similarly transform community structure, especially for intermediate consumers. To date, emp...
Article
Full-text available
Food webs assemble via the interacting constraints of dispersal limitation and bottom-up trophic dependencies where consumers can only establish after their resources have arrived. These factors can affect assembly by influencing the expression of the regional species pool in local patches, but how this unfolds mechanistically remains unclear. Here...
Article
Full-text available
Understanding the impacts of species extinctions on the functioning of food webs is a challenging task because of the complexity of ecological interactions. We report the impacts of experimental species extinctions on the functioning of two food webs of freshwater and marine systems. We used a linear model to partition the variance among the multip...
Poster
Full-text available
Many studies in different ecosystems have shown that stressors co-occur and interact with each other to influence organisms. In river networks, local stressors change the quantity and quality of the material that subsidizes downstream sections. However, most of the multiple stressor research has focused on the effects of stressors at the place of t...
Article
Full-text available
Biological invasions are globally affecting ecosystems, causing local species loss and altering ecosystem functioning. Understanding how such biological invasions occur and succeed is thus of high priority. Both local properties and the spatial network structure have been shown to be determinants of invasion success, and the identification of spati...
Preprint
Full-text available
The integration of meta-ecosystem processes over large spatial extent is critical to predicting whether and how global changes might impact biodiversity and ecosystem functions. Yet, there remains an important gap in meta-ecosystem models to predict multiple ecosystem functions (e.g., carbon sequestration, elemental cycling, trophic efficiency) acr...
Article
Full-text available
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Article
Full-text available
Aim Providing a quantitative overview of ecosystem functioning in a three‐dimensional space defined by ecosystem stocks, fluxes and rates, across major ecosystem types and climatic zones. Location Global. Time period 1966–2019. Major taxa studied Ecosystem‐level measurements (all organism types). Methods We conducted a global quantitative synth...
Preprint
Full-text available
Biological invasions are globally affecting ecosystems, causing local species loss and altering ecosystem functioning. Understanding the success and unfolding of such biological invasions is thus of high priority. Both local properties and the spatial network structure have been shown to be determinants of invasion success, and the identification o...
Article
Cross‐ecosystem subsidies are studied with a focus on resource exchange at local ecosystem boundaries. This perspective ignores regional dynamics that can emerge via constraints imposed by the landscape, potentially leading to spatially‐dependent effects of subsidies and spatial feedbacks. Using miniaturized landscape analogues of river dendritic a...
Article
Full-text available
Assessing individual components of biodiversity, such as local or regional taxon richness, and differences in community composition is a long‐standing challenge in ecology. It is especially relevant in spatially structured and diverse ecosystems. Environmental DNA (eDNA) has been suggested as a novel technique to detect taxa and therefore may allow...
Preprint
Full-text available
Cross-ecosystem subsidies are studied with a focus on resource exchange at local ecosystem boundaries. This perspective ignores regional dynamics that can emerge via constraints imposed by the landscape, potentially leading to spatially-dependent effects of subsidies and spatial feedbacks. Using miniaturized landscape analogues of river dendritic a...
Article
Full-text available
Leaf traits are frequently measured in ecology to provide a ‘common currency’ for predicting how anthropogenic pressures impact ecosystem function. Here, we test whether leaf traits consistently respond to experimental treatments across 27 globally distributed grassland sites across 4 continents. We find that specific leaf area (leaf area per unit...
Preprint
Full-text available
Assessing individual components of biodiversity, such as local or regional taxon richness, and differences in community composition is a long-standing challenge in ecology. It is especially relevant in spatially structured and diverse ecosystems. Environmental DNA (eDNA) has been suggested as a novel technique to accurately measure biodiversity. Ho...
Article
Full-text available
Moving beyond species count data is an essential step to better understand the effects of environmental perturbations on biodiversity and ecosystem functions, and to eventually better predict the strength and direction of those effects. Here, coupling an integrative path analysis approach with data from an extensive countrywide monitoring program,...
Article
Global analyses of biodiversity consistently reveal recurrent patterns of species distributions worldwide. However, unveiling the specific mechanisms behind those patterns remains logistically challenging, yet necessary for reliable biodiversity forecasts. Here, we combine theory and experiments to investigate the processes underlying spatial biodi...
Article
Full-text available
Ecosystems are widely interconnected by spatial flows of material, but the overall importance of these flows relative to local ecosystem functioning remains unclear. Here we provide a quantitative synthesis on spatial flows of carbon connecting ecosystems worldwide. Cross-ecosystem flows range over eight orders of magnitude, bringing between 10−3 a...
Preprint
Full-text available
Moving beyond species count data is an essential step to better understand the effects of environmental perturbations on biodiversity and ecosystem functions, and to eventually better predict the strength and direction of those effects. Here, coupling an integrative path analysis approach with data from an extensive countrywide monitoring program,...
Article
Full-text available
Species richness is regulated by a complex network of scale-dependent processes. This complexity can obscure the influence of limiting species interactions, making it difficult to determine if abiotic or biotic drivers are more predominant regulators of richness. Using integrative modeling of freshwater fish richness from 721 lakes along an 11olati...
Preprint
Ecosystems are widely inter-connected by spatial flows of resources 1,2 , yet primarily studied in a local context. Meta-ecosystem models suggest that cross-ecosystem subsidies can play an essential role in ecosystem functioning, notably by controlling local availability of resources for biological communities 3–6 . The general contribution of thes...
Article
Theory and experiments strongly support the importance of interactive effects of multiple factors shaping biodiversity, although their importance rarely has been investigated at biogeographically relevant scales. In particular, the importance of higher order interactions among environmental factors at such scales is largely unknown. We investigated...
Article
Full-text available
The local- and regional-based forms of anthropogenic change reducing grassland diversity are generally identified, but these scale-dependent processes tend to co-occur with unclear interactive effects. Here, we explicitly test how common local and regional perturbations simultaneously affect plant alpha and beta diversity in a multiyear community a...
Article
The meta-ecosystem framework demonstrates the significance of among-ecosystem spatial flows for ecosystem dynamics and has fostered a rich body of theory. The high level of abstraction of the models, however, impedes applications to empirical systems. We argue that further understanding of spatial dynamics in natural systems strongly depends on den...
Article
Leaf litter decomposition is a major ecosystem process that can link aquatic to terrestrial ecosystems by flows of nutrients. Biodiversity and ecosystem functioning research hypothesizes that the global loss of species leads to impaired decomposition rates and thus to slower recycling of nutrients. Especially in aquatic systems, an understanding of...
Preprint
Full-text available
Statement of authorship EH, IG, EAF and FA designed the research; IG and EAF designed the model; IG programmed and ran the model, analyzed the simulation data with support from EAF and produced the figures; EH conducted the lab experiment with support from IG, EAF and FA, processed the experimental data with support from IG, and carried out the ana...
Article
Full-text available
In many natural systems, the physical structure of the landscape dictates the flow of resources. Despite mounting evidence that communities' dynamics can be indirectly coupled by reciprocal among ecosystem resource flows, our understanding of how directional resource flows might indirectly link biological communities is limited. We here propose tha...
Article
Full-text available
Dans le contexte actuel de déclin important de la biodiversité et d’effritement constant des services écosystémiques qu’elle procure, les approches de conservation classiques semblent en partie inadéquates pour maintenir l’intégrité des écosystèmes dont les sociétés humaines ont pourtant besoin, car les priorités de conservation sont d’abord établi...
Preprint
Full-text available
In many natural systems, the physical structure of the landscape dictates the flow of resources. Despite mounting evidence that communities’ dynamics can be indirectly coupled by reciprocal among-ecosystem resource flows, our understanding of how directional resource flows might indirectly link biological communities is limited. We here propose tha...
Article
Full-text available
Most spatial ecology focuses on how species dispersal affects community dynamics and coexistence. Ecosystems, however, are also commonly connected by flows of resources. We experimentally tested how neighbouring communities indirectly influence each other in absence of dispersal, via resource exchanges. Using two-patch microcosm meta-ecosystems, we...
Article
Ecosystems are linked to neighbouring ecosystems not only by dispersal, but also by the movement of subsidy. Such subsidy couplings between ecosystems have important landscape-scale implications because perturbations in one ecosystem may affect community structure and functioning in neighbouring ecosystems via increased/decreased subsidies. Here, w...
Article
Ecosystems are linked to neighbouring ecosystems not only by dispersal, but also by the movement of subsidy. Such subsidy couplings between ecosystems have important landscape-scale implications because perturbations in one ecosystem may affect community structure and functioning in neighbouring ecosystems via increased/decreased subsidies. Here, w...
Article
Full-text available
Temperature is known to influence ecosystem processes through its direct effect on biological rates such as respiration and nutrient cycling. These changes can then indirectly affect ecologically processes by altering trophic dynamics, the persistence of a species in a given environment, and, consequently, its distribution. However, it is not known...
Research
Full-text available
Habitat fragmentation can intensify consumer attack on plants if herbivores stay longer, eat more extensively, or exhibit higher density at low resource availability; it may also reduce attack if consumers are dispersal limited and therefore fail to forage on smaller or more distant patches.
Article
Full-text available
Habitat fragmentation can intensify consumer attack on plants if herbivores stay longer, eat more extensively, or exhibit higher density at low resource availability; it may also reduce attack if consumers are dispersal limited and therefore fail to forage on smaller or more distant patches. Here we test these alternatives with a large-scale grassl...
Conference Paper
Background/Question/Methods Primary consumers (herbivores) continue to undergo substantial changes associated with global environment change (GEC), potentially affecting diversity, structure, and function of biological systems given their importance for these processes. This is especially true for insects – invertebrate primary consumers have sub...
Article
Full-text available
There is an urgent need to develop predictive indicators of the effect of species loss on ecosystem functioning. Body size is often considered as a good indicator because of its relationship to extinction risk and several functional traits. Here, we examined the predictive capacity of species body size in marine and freshwater multitrophic systems....
Conference Paper
Background/Question/Methods Island biogeography theory predicts area and isolation to drive assembly irrespective of traits, a view supported by aspects of metacommunity theory where initial colonization is mostly constrained by stochasticity while species sorting only occurs later in assembly. However, These assumptions are unlikely to hold true...
Conference Paper
Background/Question/Methods Climate influences ecosystem functioning through its direct effect on the biological rate of species and indirectly through its effect on species distribution and interactions. Understanding the relative importance of these factors is crucial for predicting the impact that climate change will have on ecological systems...

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