André Frainer

André Frainer
Norwegian Institute for Nature Research | NINA · Department of Arctic Ecology

PhD, Ecology

About

45
Publications
21,446
Reads
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1,152
Citations
Citations since 2016
38 Research Items
1128 Citations
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Introduction
In my research I aim at disentangling how human-induced disturbances, including climate and land-use changes, are affecting species composition, diversity, and distribution. Most of my work is done in freshwater and marine ecosystems.
Additional affiliations
September 2018 - present
UiT The Arctic University of Norway
Position
  • Research Associate
September 2018 - present
Norwegian Institute for Nature Research
Position
  • Researcher
September 2015 - August 2018
UiT The Arctic University of Norway
Position
  • PostDoc Position
Education
September 2008 - December 2013
Umeå University
Field of study
  • Ecology
March 2006 - April 2008
June 2002 - January 2006

Publications

Publications (45)
Article
Full-text available
Significance Arctic marine ecosystems are experiencing a rapid biogeographic change following the highest warming rates observed around the globe in recent decades. Currently, there are no studies of how the observed shifts in species composition are affecting Arctic marine ecosystem functioning at a biogeographic scale. We address this issue via f...
Article
Species interactions can influence ecosystem functioning by enhancing or suppressing the activities of species that drive ecosystem processes, or by causing changes in biodiversity. However, one important class of species interactions - parasitism - has been little considered in biodiversity and ecosystem functioning (BD-EF) research. Parasites mig...
Article
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As temperatures rise, motile species start to redistribute to more suitable areas, potentially affecting the persistence of several resident species and altering biodiversity and ecosystem functions. In the Barents Sea, a hotspot for global warming, marine fish from boreal regions have been increasingly found in the more exclusive Arctic region. He...
Article
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Forest clearance is a pervasive disturbance worldwide, but many of its impacts are regarded as transient, diminishing in intensity as forest recovers. However, forests can take decades to centuries to recover after severe disturbances, and temporal lags in recovery of ecosystem properties for different forest habitats are mostly unknown. This inclu...
Article
Host density, host body size and ambient temperature have all been positively associated with increases in parasite infection. However, the relative importance of these factors in shaping long‐term parasite population dynamics in wild host populations is unknown due to the absence of long‐term studies. Here, we examine long‐term drivers of gill lic...
Article
Full-text available
One billion tons of carbon are annually transported to the global ocean, and the fate of this carbon hinges not only on marine processing rates, but also on freshwater processing during downstream transport. Using a cotton‐strip assay, we assessed the decomposition of organic matter in marine and freshwater sites and simulated its downstream transp...
Article
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Microbes play a critical role in plant litter decomposition and influence the fate of carbon in rivers and riparian zones. When decomposing low‐nutrient plant litter, microbes acquire nitrogen (N) and phosphorus (P) from the environment (i.e., nutrient immobilization), and this process is potentially sensitive to nutrient loading and changing clima...
Cover Page
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Wetlands are key habitats contributing to the removal and transformation of harmful chemicals from surface water, helping to underpin delivery of clean water to human societies. Among those chemicals, nitrate (NO3-) is one of the most common elements responsible for water quality degradation worldwide. Wetlands have potential to transform and remov...
Article
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There is a growing recognition that functional measures of diversity, based on quantification of functionally important species traits, are useful for explaining variation in ecosystem processes. However, the mechanisms linking functional diversity to different processes remain poorly understood, hindering development of a predictive framework for...
Article
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We propose 'triple-blind review' for peer-reviewed journals - a process that keeps author identities and affiliations blind to manuscript editors until after first appraisal. Blinded appraisal will help to reduce the biases that negatively affect under-represented and minority scientists, ultimately better supporting equity in scientific publishing...
Chapter
The decomposition of plant litter in freshwaters is an integrative process involving multiple organism groups and connecting terrestrial and freshwater ecosystems. The quantification of leaf litter decomposition has been advocated as an effective indicator of ecosystem functional integrity in the bioassessment of freshwaters. Indeed, variation in l...
Article
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Marine Spatial Planning (MSP) is a relatively new approach to ocean management and has been widely implemented worldwide. Ideally, MSP should be established as a public process that analyzes and distributes human activities across space and time to achieve ecological, economic and social goals, which historically have been accomplished exclusively...
Article
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Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low a...
Article
Full-text available
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low a...
Article
Full-text available
Species are redistributing globally in response to climate warming, impacting ecosystem functions and services. In the Barents Sea, poleward expansion of boreal species and a decreased abundance of Arctic species are causing a rapid borealisation of the Arctic communities. This borealisation might have profound consequences on the Arctic food web b...
Article
Marine mammals are important players in the Barents Sea ecosystem but their structural role in the foodweb has been little explored. We compare foodweb-related characteristics within and between phylogenetic groups for 19 marine mammals. As a group, they directly connect to the most central species (i.e cod and haddock) in the Barents Sea (i.e. cod...
Article
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Multiple stressors are increasingly affecting organisms and communities, thereby modifying ecosystems' state and functioning. Raising awareness about the threat from multiple stressors has increased the number of experimental and observational studies specifically addressing consequences of stressor interactions on biota. Most studies measure the d...
Article
1.Two common Dibothriocephalus (formerly Diphyllobothrium) tapeworm species were significantly reduced by experimental culling of their fish host Arctic charr (Salvelinus alpinus) in a subarctic lake. 2.Between 1984 and 1991, funnel traps were used to cull ~ 35 metric tons of Arctic charr, reducing charr density by ~ 80%. As charr densities decreas...
Article
Global patterns of biodiversity have emerged for soil microorganisms, plants and animals, and the extraordinary significance of microbial functions in ecosystems is also well established. Virtually unknown, however, are large-scale patterns of microbial diversity in freshwaters, although these aquatic ecosystems are hotspots of biodiversity and bio...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Habitat restoration is increasingly undertaken in degraded streams and rivers to help improve biodiversity and ecosystem functioning. Follow-up assessments focused on outcomes for biodiversity have often found scant evidence for recovery, thus raising concerns about the efficacy of habitat restoration for improving ecological integrity. However, re...
Article
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Plant litter represents a major basal resource in streams, where its decomposition is partly regulated by litter traits. Litter-trait variation may determine the latitudinal gradient in decomposition in streams, which is mainly microbial in the tropics and detritivore-mediated at high latitudes. However, this hypothesis remains untested, as we lack...
Article
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Many invasive species are expanding northwards into boreal and subarctic habitats, but research on the factors favoring their establishment in these regions remains limited. In three Swedish lakes we investigated the growth of Elodea canadensis Michx, a highly invasive macrophyte that is spreading northwards in Europe and Alaska. We conducted an in...
Article
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Parasite communities can show large differences in species composition between sympatric host species. Here, we assessed how divergent resource use of polymorphic populations of Arctic charr from two environmentally similar sub-arctic lakes was related to parasite community composition. Large similarities in parasite infections were found for both...
Article
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How are resource consumption and growth rates of litter-consuming detritivores affected by imbalances between consumer and litter C:N:P ratios? To address this question, we offered leaf litter as food to three aquatic detritivore species, which represent a gradient of increasing body N:P ratios: a crustacean, a caddisfly, and a stonefly. The detrit...
Article
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Benthic invertebrate communities play a fundamental role in lake ecosystems, and the understanding of how those benthic communities are structured, particularly in terms of the identity and spatiotemporal distribution of their functional traits, is key to our understanding of how lake ecosystems work. In Takvatn, a subarctic lake in northern Norway...
Article
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Subarctic populations of brown trout (Salmo trutta) are often heavily infected with cestodes of the genus Diphyllobothrium, assumedly because of their piscivorous behaviour. This study explores possible associations between availability of fish prey and Diphyllobothrium spp. infections in lacustrine trout populations. Trout in (i) allopatry (group...
Article
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Species functional traits provide an important conceptual link between the effects of disturbances on community composition and diversity, and their ultimate outcomes for ecosystem functioning. Across 10 boreal streams covering a gradient of increasing intensity of land-use management, from forested to agricultural sites, we analysed relationships...
Article
Full-text available
Plant leaf litter comprises the major common source of energy and nutrients in forested soil and freshwater ecosystems worldwide. However, despite the similarity of physical and biochemical processes, generalizations across aquatic and terrestrial ecosystems regarding litter decomposition drivers remain elusive. We reanalyzed data from a published...
Article
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Biodiversity and ecosystem functioning theory suggests that litter mixtures composed of dissimilar leaf species can enhance decomposition due to species trait complementarity. Here we created a continuous gradient of litter chemistry trait variability within species mixtures to assess effects of litter dissimilarity on three related processes in a...
Article
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1. Despite ample experimental evidence indicating that biodiversity might be an important driver of ecosystem processes, its role in the functioning of real ecosystems remains unclear. In particular, the understanding of which aspects of biodiversity are most important for ecosystem functioning, their importance relative to other biotic and abiotic...
Article
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Soil invertebrate distribution in Araucaria forest, grassland and edge habitats was studied in both disturbed and undisturbed areas in southern Brazil. Mean-density and taxa compositions were verified. Invertebrate densities differed between grassland and the other two habitats in the undisturbed area but not across the disturbed one. At the distur...
Article
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SIR — In your Special Report ‘Brazil goes to war against logging’ (Nature 452, 134–135; 2008), you argue that the Brazilian government is willing to stop logging operations on the Amazon and to push down Brazil’s greenhouse-gas emissions. But the Brazilian government still plans to build several hydroelectric power plants on the Amazon (see http://...

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Projects

Projects (3)
Project
The Interdisciplinary Marine Early Career Network (IMECaN) provides a networking platform, training programmes, and leadership opportunities for early career marine researchers. Follow our project to network and share research with fellow members. http://imber.info/imecan-interdisciplinary-marine-early-career-network/
Project
To quantify variation in ecosystem functional properties and community structural parameters along a gradient of increasing geomorphic complexity associated with river restoration undertaken in the Vindel River catchment, Northern Sweden, and to track changes in ecosystem structure and function with increasing time since restoration, and with increasing restoration effort.
Project
The main project goal is to evaluate the role of parasites and species additions in food-web topology and dynamics using subarctic lakes as model systems.