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| Open AccessBlue and green food webs respond differently to elevation and land use
Aquatic (blue) and terrestrial (green) food webs are part of the same landscape, but it remains unclear whether they respond similarly to shared environmental gradients. Using long-term monitoring data from Switzerland and a metaweb approach, this study reveals how inferred blue and green food webs exhibit different properties along an elevation gradient and among land-use types.
- Hsi-Cheng Ho
- , Jakob Brodersen
- & Florian Altermatt
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Article
| Open AccessA functional vulnerability framework for biodiversity conservation
At a time when protecting the environment is urgent, dealing with inherent uncertainties in the responses of biodiversity to disturbances is essential. This study promotes a promising tool to assess the vulnerability of species assemblages to guide protection efforts even if species response and disturbance regimes are poorly documented.
- Arnaud Auber
- , Conor Waldock
- & David Mouillot
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| Open AccessRaptors avoid the confusion effect by targeting fixed points in dense aerial prey aggregations
Flocking, schooling, and swarming prey are thought to benefit from a confusion effect. However, here the authors show that hawks attacking swarming bats avoid confusion by steering towards a fixed point in the swarm instead of targeting any one individual.
- Caroline H. Brighton
- , Laura N. Kloepper
- & Graham K. Taylor
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Article
| Open AccessLate quaternary biotic homogenization of North American mammalian faunas
Biotic homogenization, which is increased similarity in the composition of species among communities, is rising due to human activities. Using North American mammal fossil records from the past 30,000 years, this study shows that this phenomenon is ancient, beginning between 12,000 and 10,000 years ago with the extinction of the mammal megafauna.
- Danielle Fraser
- , Amelia Villaseñor
- & S. Kathleen Lyons
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Article
| Open AccessEcological networks of dissolved organic matter and microorganisms under global change
Microbes are intimately linked with the fate of organic matter. Here the authors develop an ecological network framework and show how microbes and dissolved organic matter interact along global change drivers of temperature and nutrient enrichment via manipulative field experiments on mountains.
- Ang Hu
- , Mira Choi
- & Jianjun Wang
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Article
| Open AccessDrought-exposure history increases complementarity between plant species in response to a subsequent drought
Using experimental communities of grassland species, this study shows that drought-exposure history can accelerate recovery from subsequent drought through increased niche complementarity between species. This transgenerational effect may enhance the sustainability of biodiversity and ecosystem functioning in a future with more frequent droughts.
- Yuxin Chen
- , Anja Vogel
- & Bernhard Schmid
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| Open AccessClimate and hydraulic traits interact to set thresholds for liana viability
Lianas are an important component of tropical forests. Here the authors compare liana and tree functional trait distributions from across the tropics and use a liana-tree competition model to show that a key hydraulic trait influences liana viability and its response to future climate conditions.
- Alyssa M. Willson
- , Anna T. Trugman
- & David Medvigy
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Article
| Open AccessLow level of anthropization linked to harsh vertebrate biodiversity declines in Amazonia
It is unclear how far the impact of deforestation can spread. Here the authors analyse freshwater eDNA data along two rivers in the Amazon forest, and find that low levels of deforestation are linked to substantial reductions of fish and mammalian diversity downstream.
- Isabel Cantera
- , Opale Coutant
- & Sébastien Brosse
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Article
| Open AccessThe evolution of trait variance creates a tension between species diversity and functional diversity
The positive relationship between species diversity and functional diversity has been shown to vary. Here, the authors use theoretical models and data from Galápagos land snail communities to show how eco-evolutionary processes can force species to evolve narrower trait breadths in more species-rich communities to avoid competition, creating a negative relationship.
- György Barabás
- , Christine Parent
- & Frederik De Laender
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Article
| Open AccessCompetition contributes to both warm and cool range edges
Using a field experiment, this study shows that both lowland and alpine plant species experience greater competitive effects and a reduced ability to coexist towards their elevation range edges due to increased niche overlap and competitive inequality. These findings suggest competition helps set both lower and upper elevation range limits.
- Shengman Lyu
- & Jake M. Alexander
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Article
| Open AccessMetabolic plasticity can amplify ecosystem responses to global warming
Organisms can alter their physiological response to warming. Here, the authors show that the ability to raise metabolic rate following exposure to warming is inverse to body size and provide a mathematical model which estimates that metabolic plasticity could amplify energy flux through ecosystems in response to warming.
- Rebecca L. Kordas
- , Samraat Pawar
- & Eoin J. O’Gorman
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Article
| Open AccessGlobal patterns in functional rarity of marine fish
Rare species are crucial for biological diversity and ecosystem functioning. Here, the authors combine taxonomic and functional diversity data to quantify rarity across marine fish species, identifying mismatches between rarity hotspots and protected areas.
- Isaac Trindade-Santos
- , Faye Moyes
- & Anne E. Magurran
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Article
| Open AccessHeterogeneity within and among co-occurring foundation species increases biodiversity
Species interactions that can enhance habitat heterogeneity such as facilitation cascades of foundation species have been overlooked in biodiversity models. This study conducted 22 geographically distributed experiments in different ecosystems and biogeographical regions to assess the extent to which biodiversity is explained by three axes of habitat heterogeneity in facilitation cascades.
- Mads S. Thomsen
- , Andrew H. Altieri
- & Gerhard Zotz
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Article
| Open AccessWater sources aggregate parasites with increasing effects in more arid conditions
Amid climate and land use changes, it is important to identify and monitor hotspots of animal activity where disease transmission can occur. Using experimental and observational methods in an East African savannah, this study shows water sources increase the concentration of faecal-oral parasites in the environment and that this effect is amplified in drier areas and following periods of low rainfall.
- Georgia Titcomb
- , John Naisikie Mantas
- & Hillary Young
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| Open AccessEmergence of a neopelagic community through the establishment of coastal species on the high seas
Discoveries of persistent coastal species in the open ocean shift our understanding of biogeographic barriers. Floating plastic debris from pollution now supports a novel sea surface community composed of coastal and oceanic species at sea that might portend significant ecological shifts in the marine environment.
- Linsey E. Haram
- , James T. Carlton
- & Gregory M. Ruiz
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Article
| Open AccessSpecies richness and identity both determine the biomass of global reef fish communities
Species identity and richness both contribute biodiversity-ecosystem functioning relationships. Here the authors apply a decomposition approach inspired by the Price equation to a global dataset of reef fish community biomass, finding that increased richness and community compositions favouring large-bodied species enhance biomass.
- Jonathan S. Lefcheck
- , Graham J. Edgar
- & Aneil F. Agrawal
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Article
| Open AccessMarine phytoplankton functional types exhibit diverse responses to thermal change
Phytoplankton communities are important players in biogeochemical processes, but are sensitive to global warming. Here, a meta-analysis shows how the varied responses of phytoplankton to rising temperatures could potentially alter growth dynamics and community structure in a future ocean.
- S. I. Anderson
- , A. D. Barton
- & T. A. Rynearson
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Article
| Open AccessBird population declines and species turnover are changing the acoustic properties of spring soundscapes
Birdsong has long connected humans to nature. Historical reconstructions using bird monitoring and song recordings collected by citizen scientists reveal that the soundscape of birdsong in North America and Europe is both quieter and less varied, mirroring declines in bird diversity and abundance.
- C. A. Morrison
- , A. Auniņš
- & S. J. Butler
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Article
| Open AccessThe spatial configuration of biotic interactions shapes coexistence-area relationships in an annual plant community
Local patterns of species coexistence across scales could determine the shape of species-area relationships. Here the authors apply a structuralist approach to empirical data on annual plant communities to assess how species interactions shape coexistence- and species-area relationships.
- David García-Callejas
- , Ignasi Bartomeus
- & Oscar Godoy
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| Open AccessEctomycorrhizal access to organic nitrogen mediates CO2 fertilization response in a dominant temperate tree
Root-mycorrhizal interactions could help explain the heterogeneity of plant responses to CO2 fertilisation and nutrient availability. Here the authors combine tree-ring and metagenomic data to reveal that tree growth responses to increasing CO2 along a soil nutrient gradient depend on the nitrogen foraging traits of ectomycorrhizal fungi.
- Peter T. Pellitier
- , Inés Ibáñez
- & Kirk Acharya
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Article
| Open AccessThe importance of species interactions in eco-evolutionary community dynamics under climate change
Understanding the dynamics of species interactions can help predict community responses to climate change. A spatially explicit model finds that species interactions and competition mitigate the harmful impacts of climate change, and that temperature-dependent competition makes communities more variable and responsive to changing climates.
- Anna Åkesson
- , Alva Curtsdotter
- & György Barabás
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Article
| Open AccessContrasting responses of above- and belowground diversity to multiple components of land-use intensity
Land use intensification is a major driver of biodiversity change. Here the authors measure diversity across multiple trophic levels in agricultural grassland landscapes of varying management, finding decoupled responses of above- and belowground taxa to local factors and a strong impact of landscape-level land use.
- Gaëtane Le Provost
- , Jan Thiele
- & Peter Manning
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| Open AccessRapid evolution of bacterial mutualism in the plant rhizosphere
Beneficial plant-microbe interactions are common in nature, but direct evidence for the evolution of mutualism is scarce. Here, Li et al. experimentally evolve a rhizospheric bacterium and find that it can evolve into a mutualist on a relatively short timescale.
- Erqin Li
- , Ronnie de Jonge
- & Alexandre Jousset
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Article
| Open AccessIntrinsic ecological dynamics drive biodiversity turnover in model metacommunities
Change in ecological communities can be driven by extrinsic forces, but the degree to which intrinsic population dynamics drive turnover has remained unclear. Here the authors use metacommunity modelling to show that biodiversity change previously attributed to external drivers can be explained based on intrinsic ecosystem dynamics.
- Jacob D. O’Sullivan
- , J. Christopher D. Terry
- & Axel G. Rossberg
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Article
| Open AccessNitrogen and phosphorus fertilization consistently favor pathogenic over mutualistic fungi in grassland soils
Anthropogenic nutrient enrichment may drive shifts in soil microbial communities. Here, the authors analyse nitrogen and phosphorus addition effects on soil fungi in a distributed grassland experiment across four continents, finding promotion of pathogens, suppression of mutualists, and no shifts in saprotrophs.
- Ylva Lekberg
- , Carlos A. Arnillas
- & Jeremiah A. Henning
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Article
| Open AccessExotic plants accumulate and share herbivores yet dominate communities via rapid growth
It is unclear whether plant-herbivore interactions systematically favour exotic plant species. Here the authors investigate plant-herbivore and plant-soil biota interactions in experimental mesocosm communities, finding that exotic plants dominate community biomass despite accumulating more invertebrate herbivores.
- Warwick J. Allen
- , Lauren P. Waller
- & Jason M. Tylianakis
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Article
| Open AccessLinking functional traits and demography to model species-rich communities
Advances in process-based community ecology models are hindered by the challenge of linking functional traits to demography in species-rich systems, where a high number of parameters need to be estimated from limited data. Here the authors propose a new Bayesian framework to calibrate community models via functional traits, and validate it in a species-rich plant community.
- Loïc Chalmandrier
- , Florian Hartig
- & Loïc Pellissier
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| Open AccessNon-additive microbial community responses to environmental complexity
How microbial community properties change under increasingly complex combinations of resources remains unclear. Here, the authors studied hundreds of synthetic consortia to identify the factors that govern how growth and taxonomic diversity scale with environmental complexity.
- Alan R. Pacheco
- , Melisa L. Osborne
- & Daniel Segrè
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Article
| Open AccessDistance to native climatic niche margins explains establishment success of alien mammals
Whether invasive species must first establish in conditions within their native climatic niche before spreading remains largely untested. This study presents the Niche Margin Index for estimating climatic niche-matching of alien mammal species to a particular site, which could be used to help predict the success of invasions.
- Olivier Broennimann
- , Blaise Petitpierre
- & Antoine Guisan
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| Open AccessImpact of artificial light at night on diurnal plant-pollinator interactions
There is growing recognition that artificial light at night has wide-ranging effects on plants and animals, including disruption of nocturnal pollination. Here, Giavi et al. show that artificial light at night can also alter the daytime interactions between plants and pollinators.
- Simone Giavi
- , Colin Fontaine
- & Eva Knop
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Article
| Open AccessFungi and insects compensate for lost vertebrate seed predation in an experimentally defaunated tropical forest
Ecologists predict that loss of large vertebrates will alter tropical plant communities. Here, the authors report a field experiment on seed mortality and seedling establishment in Borneo, in which experimental defaunation of large seed consumers was functionally compensated by insects and fungi.
- Peter Jeffrey Williams
- , Robert C. Ong
- & Matthew Scott Luskin
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Article
| Open AccessAn ecological network approach to predict ecosystem service vulnerability to species losses
Food web responses to species losses have the potential to cascade to ecosystem services. Here the authors apply ecological network robustness modelling to ecosystem services in salt marsh ecosystems, finding that species with supporting roles are critical to robustness of both food webs and ecosystem services.
- Aislyn A. Keyes
- , John P. McLaughlin
- & Laura E. Dee
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Article
| Open AccessResponses of intended and unintended receivers to a novel sexual signal suggest clandestine communication
Parasitoid flies eavesdrop on the mating songs of male Hawaiian crickets, creating conflict between sexual and natural selection. Here, the authors investigate the selection acting on a recently evolved male mating signal, a “purring” song, which appears to be undetected by parasitoids.
- Robin M. Tinghitella
- , E. Dale Broder
- & David M. Zonana
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Article
| Open AccessLimitation by a shared mutualist promotes coexistence of multiple competing partners
Mutualists benefit their partners by providing resources that would be difficult to obtain independently. Here, the authors show in a bacterial community and with mathematical modeling how a mutualist can promote coexistence between competitors by providing them with different limiting resources.
- Sarah P. Hammarlund
- , Tomáš Gedeon
- & William R. Harcombe
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| Open AccessThe erosion of biodiversity and biomass in the Atlantic Forest biodiversity hotspot
Quantifying forest degradation and biodiversity losses is necessary to inform conservation and restoration policies. Here the authors analyze a large dataset for the Atlantic Forest in South America to quantify losses in forest biomass and tree species richness, functional traits, and conservation value.
- Renato A. F. de Lima
- , Alexandre A. Oliveira
- & Paulo I. Prado
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| Open AccessUsing metacommunity ecology to understand environmental metabolomes
Despite growing interest in environmental metabolomics, we lack conceptual frameworks for considering how metabolites vary across space and time in ecological systems. Here, the authors apply (species) community assembly concepts to metabolomics data, offering a way forward in understanding the assembly of metabolite assemblages.
- Robert E. Danczak
- , Rosalie K. Chu
- & James C. Stegen
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| Open AccessConsistent effects of pesticides on community structure and ecosystem function in freshwater systems
The effects of pesticides on individual species could propagate into additional community-wide and ecosystem-level effects. Here the authors use a mesocosm experiment to test how a diverse array of herbicides and insecticides disrupt aquatic community structure and ecosystem function.
- Samantha L. Rumschlag
- , Michael B. Mahon
- & Jason R. Rohr
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Article
| Open AccessDynamic symbioses reveal pathways to coral survival through prolonged heatwaves
Climate change and local anthropogenic stressors threaten the persistence of coral reefs. Here the authors track coral bleaching over the course of a heatwave and find that some colonies recovered from bleaching while high temperatures persisted, but only at sites lacking in other strong anthropogenic stressors.
- Danielle C. Claar
- , Samuel Starko
- & Julia K. Baum
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Article
| Open AccessDomestication via the commensal pathway in a fish-invertebrate mutualism
It has been hypothesized that domestication can occur through the ‘commensal pathway’ in which the domesticate takes advantage of a niche created as a byproduct by the domesticator. Here, Brooker et al. provide evidence for a commensal domestication process between longfin damselfish and mysid shrimps.
- Rohan M. Brooker
- , Jordan M. Casey
- & William E. Feeney
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Article
| Open AccessNutrients cause grassland biomass to outpace herbivory
It is unclear whether terrestrial herbivores are able to consume the extra plant biomass produced under nutrient enrichment. Here the authors test this in grasslands using a globally distributed network of coordinated field experiments, finding that wild herbivore control on grassland production declines under eutrophication.
- E. T. Borer
- , W. S. Harpole
- & E. W. Seabloom
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Article
| Open AccessFew keystone plant genera support the majority of Lepidoptera species
Not all plants are equally able to support native insects. Here, the authors use data on interactions among >12,000 Lepidoptera species and >2000 plant genera across the United States, showing that few plant genera host the majority of Lepidoptera species; this information is used to suggest priorities for plant restoration.
- Desiree L. Narango
- , Douglas W. Tallamy
- & Kimberley J. Shropshire
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Article
| Open AccessClimate reverses directionality in the richness–abundance relationship across the World’s main forest biomes
Correlations between tree species diversity and tree abundance are well established, but the direction of the relationship is unresolved. Here the authors use path models to estimate plausible causal pathways in the diversity-abundance relationship across 23 global forests regions, finding a lack of general support for a positive diversity-abundance relationship, which is prevalent in the most productive lands on Earth only
- Jaime Madrigal-González
- , Joaquín Calatayud
- & Markus Stoffel
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Article
| Open AccessIntraspecific host variation plays a key role in virus community assembly
The factors that determine whether pathogens co-occur in a host are poorly understood, especially for plant viruses. Here the authors conduct field experiments with the plant Plantago lanceolata and its viruses, showing that viral co-occurrences are driven predominantly by environmental context and host genotype rather than viral interactions.
- Suvi Sallinen
- , Anna Norberg
- & Anna-Liisa Laine
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Article
| Open AccessGeneral destabilizing effects of eutrophication on grassland productivity at multiple spatial scales
Eutrophication has been shown to weaken diversity-stability relationships in grasslands, but it is unclear whether the effect depends on scale. Analysing a globally distributed network of grassland sites, the authors show a positive role of beta diversity and spatial asynchrony as drivers of stability but find that nitrogen enrichment weakens the diversity-stability relationships at different spatial scales.
- Yann Hautier
- , Pengfei Zhang
- & Shaopeng Wang
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Article
| Open AccessFrugivore-fruit size relationships between palms and mammals reveal past and future defaunation impacts
Extinctions of megafauna can have cascading effects on their ecological communities. Here, Lim et al. investigate the relationships of historical and current mammalian frugivore body size with palm fruit size, then project how further mammal extinctions are likely to affect palm communities.
- Jun Ying Lim
- , Jens-Christian Svenning
- & W. Daniel Kissling
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Article
| Open AccessMapping the bacterial metabolic niche space
The ecological niche of a given microbe is difficult to define, but can be approximated from the range of biochemical reactions encoded by its genome. Here the authors use these genomic data and analyze them using manifold learning, which generates a diffusion map of the metabolic niche space of over 2500 bacteria.
- Ashkaan K. Fahimipour
- & Thilo Gross
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| Open AccessMacroecological laws describe variation and diversity in microbial communities
Microbes interact in different ways than macro-organisms, but their interactions can still form the basis for broader macroecological patterns like the Species Abundance Distribution. Here, the author shows that thre general ecological patterns can be found in microbes, within and across biome types.
- Jacopo Grilli
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| Open AccessA quantitative framework reveals ecological drivers of grassland microbial community assembly in response to warming
Studies of microbial community assembly mechanisms typically use metrics for turnover within the whole community. Here, the authors develop an alternative approach based on turnover within lineages and dissect mechanistic change in grassland bacterial assembly under experimental warming.
- Daliang Ning
- , Mengting Yuan
- & Jizhong Zhou
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| Open AccessEffectiveness of protected areas in conserving tropical forest birds
Assessing the effectiveness of protected areas requires sufficient monitoring data inside and outside of protected areas; such data are lacking in many tropical regions. Here the authors use robust citizen science data on bird occupancy to show that protected areas are effective in maintaining bird species diversity across eight tropical biodiversity hotspots.
- Victor Cazalis
- , Karine Princé
- & Ana S. L. Rodrigues