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Open Access
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Article
| Open AccessHorizontal gene transfer is predicted to overcome the diversity limit of competing microbial species
Combining theoretical derivation and numerical simulations, this study predicts an ecological mechanism for maintaining microbial coexistence via dynamic neutrality enabled by horizontal gene transfer. This mechanism allows the emergence of microbial diversity beyond the limit predicted by previous theories.
- Shiben Zhu
- , Juken Hong
- & Teng Wang
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Article
| Open AccessPredatory protists reduce bacteria wilt disease incidence in tomato plants
Soil organisms are affected by the presence of predatory protists. Here, the authors predatory protists are negatively associated with bacteria wilt disease incidence in tomato plants and that fertilisation enhances the abundance of predatory protists
- Sai Guo
- , Zixuan Jiao
- & Stefan Geisen
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Article
| Open AccessGlobal surveillance of antimicrobial resistance in food animals using priority drugs maps
Monitoring antimicrobial resistance in food animals is challenging due to limited surveillance systems. Here, the authors combine data from point prevalence surveys in lower- and middle-income settings to map resistance to seven antimicrobials and predict which are likely to exceed key resistance thresholds.
- Cheng Zhao
- , Yu Wang
- & Thomas P. Van Boeckel
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Article
| Open AccessRevealing the hidden carbon in forested wetland soils
A large proportion of wetland extent is not mapped in currently available national datasets. Incorporating newly revealed wetlands into soil carbon mapping methods increases estimates of wetland soil carbon stock by 482%.
- Anthony J. Stewart
- , Meghan Halabisky
- & L. Monika Moskal
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Article
| Open AccessSalinity causes widespread restriction of methane emissions from small inland waters
Small inland water bodies are widely seen as important sources of methane to the atmosphere. This study demonstrates that hardwater ecosystems emit less of this potent greenhouse gas than predicted due to complex biogeochemical controls
- Cynthia Soued
- , Matthew J. Bogard
- & Paige Kowal
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Article
| Open AccessPatterns of tropical forest understory temperatures
This study reveals the spatial and temporal patterns of temperature buffer inside the tropical forests. It provides insights into the forests’ microclimate that controls the functioning of living organisms residing under the forest canopy.
- Ali Ismaeel
- , Amos P. K. Tai
- & Eduardo Eiji Maeda
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Perspective
| Open AccessThe principles of natural climate solutions
Natural climate solutions can mitigate climate change but misunderstandings about what constitutes a natural climate solution generate unnecessary confusion and controversy. This Perspective distills five foundational principles of natural climate solutions and fifteen operational principles for practical implementation.
- Peter Woods Ellis
- , Aaron Marr Page
- & Susan C. Cook-Patton
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Article
| Open AccessGreenhouse gas emissions from US irrigation pumping and implications for climate-smart irrigation policy
This study demonstrates the energy use of US pump irrigation produced 12.6 million tonnes CO2e in 2018, with spatial variability modulated by water source and fuel choice. These county-level estimates can inform strategic irrigation expansion and emissions reduction efforts.
- Avery W. Driscoll
- , Richard T. Conant
- & Nathaniel D. Mueller
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Article
| Open AccessThe angiosperm radiation played a dual role in the diversification of insects and insect pollinators
Interactions with angiosperms are thought to have had a significant impact on insect diversification. Here, the authors use a Bayesian process-based approach to find that angiosperm radiation played a dual role that changed through time, mitigating insect extinction in the Cretaceous and promoting insect origination in the Cenozoic.
- David Peris
- & Fabien L. Condamine
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Article
| Open AccessScattered tree death contributes to substantial forest loss in California
Tree mortality due to climate change and other disturbances is on the rise. Here, the authors use high-resolution remote sensing data, ground observations and deep learning to quantify individual dead trees and potential drivers across California in the year 2020, encompassing 91.4 million dead trees.
- Yan Cheng
- , Stefan Oehmcke
- & Stéphanie Horion
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Article
| Open AccessShifting patterns of dengue three years after Zika virus emergence in Brazil
Dengue virus circulation was unusually low in Brazil in 2015-2018 following the emergence of Zika virus, but subsequently resurged causing large outbreaks with a lower mean age of infection. Here, the authors use mathematical modelling to investigate the links between dengue dynamics and prior Zika infection.
- Francesco Pinotti
- , Marta Giovanetti
- & José Lourenço
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Article
| Open AccessDrought may exacerbate dryland soil inorganic carbon loss under warming climate conditions
Drought is shown to enhance the temperature sensitivity of soil inorganic carbon dissolution but to weaken that of soil organic carbon decomposition, indicating that drought may exacerbate dryland soil carbon loss from inorganic carbon under warming.
- Jinquan Li
- , Junmin Pei
- & Ming Nie
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Article
| Open AccessMarkets as drivers of selection for highly virulent poultry pathogens
Live poultry markets in rural areas can be hotspots for transmission of pathogens, but the effects of markets on selection of viral virulence are not known. This study demonstrates through mathematical modelling that high turnover rate and persistence of viral particles can select for highly virulent pathogens in markets.
- Justin K. Sheen
- , Fidisoa Rasambainarivo
- & C. Jessica E. Metcalf
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Article
| Open AccessThermal responses of dissolved organic matter under global change
The response of organic molecules to climate change is linked to warming, nutrient loading, and greenhouse gas emissions, according to an indicator developed to quantify the aggregated thermal response of individual organic molecules.
- Ang Hu
- , Kyoung-Soon Jang
- & Jianjun Wang
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Article
| Open AccessMeta-analysis shows no consistent evidence for senescence in ejaculate traits across animals
A key assumption of ageing research is that old males are less fertile. A meta-analysis of ejaculate traits challenges this, by showing senescence is not consistently observed across 157 species of animals, but is specific to only certain taxa and ejaculate traits. The study also highlights methodological factors that might modulate the evidence for reproductive senescence.
- Krish Sanghvi
- , Regina Vega-Trejo
- & Irem Sepil
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Article
| Open AccessHost- plasmid network structure in wastewater is linked to antimicrobial resistance genes
Authors apply theory and microbial ecology modelling to a wastewater sample, and show that antimicrobial resistance carrying plasmids interact with a higher number and more diverse range of bacteria than plasmids that do not carry resistance genes.
- Alice Risely
- , Arthur Newbury
- & Dirk Sanders
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Article
| Open AccessTowards estimating the number of strains that make up a natural bacterial population
What a microbial strain is and how many strains make up a natural bacterial population remain elusive concepts. Here, Viver et al. analyse Salinibacter ruber isolates and metagenomes from two solar salterns, revealing gaps within the species sequence space that they use to define and quantify sub-species categories, such as genomovars and strains, that co-exist in a saltern pond.
- Tomeu Viver
- , Roth E. Conrad
- & Ramon Rossello-Mora
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Article
| Open AccessMapping the planet’s critical areas for biodiversity and nature’s contributions to people
This study shows that conserving approximately half of global land area through protection or sustainable management could provide 90% of ten of nature’s contributions to people and could meet representation targets for 26,709 species of mammals, birds, amphibians, and reptiles. This finding supports recent commitments to conserve at least 30% of global lands and waters by 2030.
- Rachel A. Neugarten
- , Rebecca Chaplin-Kramer
- & Amanda D. Rodewald
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Article
| Open AccessA global analysis of how human infrastructure squeezes sandy coasts
In a first global analysis, researchers find that sandy shores are severely squeezed between human infrastructure and the rising sea, as on average, the first road or building is currently situated at just 390 meters distance from the shoreline.
- Eva M. Lansu
- , Valérie C. Reijers
- & Tjisse van der Heide
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Article
| Open AccessSteeper size spectra with decreasing phytoplankton biomass indicate strong trophic amplification and future fish declines
Using a global synthesis of size spectra data from pelagic food webs, this study finds that size structure is not driven by temperature as often suggested, but by the nutrient status of the system. This means that modest phytoplankton declines projected for key fishing grounds at mid-latitudes will amplify into substantial reductions in the supportable biomass of fish.
- Angus Atkinson
- , Axel G. Rossberg
- & Constantin Frangoulis
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Article
| Open AccessClimate-driven invasion and incipient warnings of kelp ecosystem collapse
Climate change is redistributing species poleward, threatening widespread socio-ecological disruption as key tipping-points are exceeded. This study examines space-time dynamics of kelp ecosystem collapse over a 15-year period along the warming coastline of eastern Tasmania and shows that an early-warning signal of kelp ecosystem collapse is recognisable well-in-advance.
- Scott D. Ling
- & John P. Keane
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Article
| Open AccessVESPA: an optimized protocol for accurate metabarcoding-based characterization of vertebrate eukaryotic endosymbiont and parasite assemblages
DNA sequencing methods for characterizing microbial communities are well developed for bacteria, archaea and fungi, but less so for eukaryotic parasites and commensals. Here, the authors present an optimized and validated metabarcoding protocol for host-associated eukaryotic communities.
- Leah A. Owens
- , Sagan Friant
- & Tony L. Goldberg
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Article
| Open AccessMicrobially mediated mechanisms underlie soil carbon accrual by conservation agriculture under decade-long warming
Agricultural soil C dynamics under climate change are difficult to predict. Here, the authors report that experimental warming increases soil organic C stocks in conservation agriculture but not in conventional agriculture, which appears driven by soil microbial responses to no tillage and C inputs from the crops.
- Jing Tian
- , Jennifer A. J. Dungait
- & Jizhong Zhou
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Article
| Open AccessMesozoic evolution of cicadas and their origins of vocalization and root feeding
The evolution of cicadas is unclear due to a lack of understanding of transitional features. Here, the authors assess adult and nymph mid-Cretaceous cicadas, to elucidate their morphological evolution and identify evidence of the origins of cicada sound-generation and subterranean lifestyle.
- Hui Jiang
- , Jacek Szwedo
- & Bo Wang
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Article
| Open AccessBiotic homogenization, lower soil fungal diversity and fewer rare taxa in arable soils across Europe
How arable farming affects soil fungal biogeography is poorly understood. Here, the authors find that prevalent fungal groups become more abundant, whereas rare groups become fewer or absent in arable lands across Europe, suggesting a biotic homogenization due to arable farming.
- Samiran Banerjee
- , Cheng Zhao
- & Marcel G. A. van der Heijden
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Article
| Open AccessUnfamiliarity generates costly aggression in interspecific avian dominance hierarchies
Although intraspecific dominance hierarchies are common, large scale interspecific dominance hierarchies are unknown. Using data from hundreds of avian species, the authors find that species that are more familiar with each other engage in less aggression and the aggression is resolved more directly.
- Gavin M. Leighton
- , Jonathan P. Drury
- & Eliot T. Miller
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Article
| Open AccessFunctional host-specific adaptation of the intestinal microbiome in hominids
Here, Rühlemann et al. analyze the gut microbiome of wild-living African great apes (Gorillas, Bonobos, Chimpanzees) in comparison to that of humans, identifying host specific patterns and shared evolutionary conserved traits disrupted in humans.
- M. C. Rühlemann
- , C. Bang
- & A. Franke
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Editorial
| Open AccessFeeding the future global population
Climate change is exacerbating challenges both for global food production and from its environmental impacts. Sustainable and socially responsible solutions for future world-wide food security are urgently needed.
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Article
| Open AccessAfrican bushpigs exhibit porous species boundaries and appeared in Madagascar concurrently with human arrival
The evolutionary history of pigs in Africa is unclear. Here, the authors examine 67 whole genomes, finding incomplete speciation between bushpigs and red river hogs as well as evidence suggesting that humans brought bushpigs to Madagascar 1000-5000 years ago.
- Renzo F. Balboa
- , Laura D. Bertola
- & Rasmus Heller
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Article
| Open AccessMore than 17,000 tree species are at risk from rapid global change
Tree species may be vulnerable to multiple global change factors. Here, the authors find that more than 17 thousand tree species are exposed to increasing anthropogenic threats, including many species classified as data-deficient in the IUCN Red List.
- Coline C. F. Boonman
- , Josep M. Serra-Diaz
- & Jens-Christian Svenning
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Article
| Open AccessLand management shapes drought responses of dominant soil microbial taxa across grasslands
Soil microbial communities are affected by climate extremes. Here, the authors impose experimental drought across 30 UK grasslands showing that bacteria and fungi exhibit drought resistance but that intensive management has a negative impact on fungi drought resilience.
- J. M. Lavallee
- , M. Chomel
- & R. D. Bardgett
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Article
| Open AccessPervasive associations between dark septate endophytic fungi with tree root and soil microbiomes across Europe
While mycorrhizal-plant interactions are widely studied, other root symbionts may also be ecologically important. Here, the authors show that dark septate endophytes are a strong predictor of rhizosphere and associated soil microbiomes in broad-leaved tree across Europe.
- Tarquin Netherway
- , Jan Bengtsson
- & Mohammad Bahram
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Article
| Open AccessEffects of plant tissue permeability on invasion and population bottlenecks of a phytopathogen
Bottleneck effects of plant barriers on pathogenic invasions remain unclear. Using a random barcoding approach, this study investigates how plant root permeability limits the invasion and population bottlenecks of a phytopathogenic Ralstonia.
- Gaofei Jiang
- , Yuling Zhang
- & Zhong Wei
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Article
| Open AccessGene regulation and speciation in a migratory divide between songbirds
Little is known about the genetic basis of many natural behaviours and how they contribute to speciation. Here the authors address this by identifying genes linked to migration of a songbird, investigating how these gene are regulated, and connecting them to potential barriers between species.
- Matthew I. M. Louder
- , Hannah Justen
- & Kira E. Delmore
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Article
| Open AccessLeucine aminopeptidase1 controls egg deposition and hatchability in male Aedes aegypti mosquitoes
Aedes aegypti transmit several arboviruses and control of the mosquito populations could be beneficial. Here the authors show that deletion of leucine aminopeptidase1 (LAP1) results in mitochondrial defects and abnormal autophagy in sperm, reducing fertility and fecundity of females. LAP1−/− males show no obvious defects in longevity and mating fitness.
- Xiaomei Sun
- , Xueli Wang
- & Zhen Zou
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Article
| Open AccessDisentangling microbial networks across pelagic zones in the tropical and subtropical global ocean
This study investigates the dynamic associations among microbes in the world’s tropical and subtropical oceans. It reveals that potential interactions vary with ocean depth and location, with most surface associations not persisting in deeper waters. The results contribute to understanding the ocean microbiome in the context of global change.
- Ina M. Deutschmann
- , Erwan Delage
- & Ramiro Logares
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Article
| Open AccessUniversal microbial reworking of dissolved organic matter along environmental gradients
Soils combat climate change by storing carbon but lose considerable amounts of carbon into downstream waters. Here a general process for how microbes transform carbon across soil-to-stream to impact its persistence in the natural environment is demonstrated.
- Erika C. Freeman
- , Erik J. S. Emilson
- & Andrew J. Tanentzap
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Article
| Open AccessWaste milk humification product can be used as a slow release nano-fertilizer
The growth in global milk demand has been accompanied by an increase in waste milk disposal. Here, the authors transform waste milk through humification and incorporate the product into attapulgite creating a nano-fertiliser that benefits for plants growing in pots.
- Yanping Zhu
- , Yuxuan Cao
- & Dongqing Cai
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Article
| Open AccessTargeted treatment of injured nestmates with antimicrobial compounds in an ant society
Infected wounds pose a major mortality risk in animals and are common in predatory ants. Here, the authors show that M. analis ants apply antimicrobial compounds produced in the metapleural glands to treat infected wounds and reduce nestmate mortality.
- Erik. T. Frank
- , Lucie Kesner
- & Laurent Keller
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Article
| Open AccessThe blue carbon of southern southwest Atlantic salt marshes and their biotic and abiotic drivers
This study provides a comprehensive characterization of blue C for South American Atlantic salt marshes and reveals that environmental and biological variables are important for an understanding of blue C storage leading to lower global estimates.
- Paulina Martinetto
- , Juan Alberti
- & Raymond Ward
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Article
| Open AccessMetallic micronutrients are associated with the structure and function of the soil microbiome
Soil micronutrients may be important for belowground biota and associated functions. Here, the authors identify the relationships between metallic micronutrients and soil microbial communities and functions across 180 sites, and validate them in a soil incubation experiment.
- Zhongmin Dai
- , Xu Guo
- & Jianming Xu
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Article
| Open AccessUndiscovered bird extinctions obscure the true magnitude of human-driven extinction waves
The true number of human-driven bird extinctions is likely larger than we think. Here, the authors combine recorded extinctions with estimates from the fossil record to suggest that ~1400 bird species have gone extinct since the Late Pleistocene.
- Rob Cooke
- , Ferran Sayol
- & Søren Faurby
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Article
| Open AccessSeasonal variation in dragonfly assemblage colouration suggests a link between thermal melanism and phenology
Body colour may be an important factor in insect phenology. Here, the authors show that colour lightness of dragonfly assemblages from the UK, collected between May and October from 1990-2020, varies in response to seasonal changes in solar radiation, suggesting a link between colour-based thermoregulation and insect phenology.
- Roberto Novella-Fernandez
- , Roland Brandl
- & Christian Hof
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Article
| Open AccessThe global importance and interplay of colour-based protective and thermoregulatory functions in frogs
Anurans—frogs and toads—are a diverse group with a remarkable variety of colours. Here, the authors report a global analysis of colour variation in anurans, finding evidence that colour lightness is important for thermoregulation, protection from UVB radiation and resistance to pathogens.
- Ricarda Laumeier
- , Martin Brändle
- & Stefan Pinkert
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Article
| Open AccessDilution of specialist pathogens drives productivity benefits from diversity in plant mixtures
Soil pathogen dilution can improve plant production. Here, the authors combine an empirical and theoretical approaches finding that specialist pathogens suppress yield in monocultures while pathogen dilution drives yield benefits in diverse plant communities.
- Guangzhou Wang
- , Haley M. Burrill
- & James D. Bever
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Article
| Open AccessMixed success for carbon payments and subsidies in support of forest restoration in the neotropics
Forest restoration in LMICs can contribute to global C mitigation targets. Here, the authors assess the economic feasibility of forest restoration methods in Panama, i.e. natural regeneration, native species plantings, and enrichment planting, showing that not all methods are economically viable.
- Katherine Sinacore
- , Edwin H. García
- & Jefferson S. Hall
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Article
| Open AccessDiversity and dissemination of viruses in pathogenic protozoa
Heeren et al study the evolutionary genomics of leishmaniasis in Peru and Bolivia to show that parasite hybridization increases the prevalence, diversity and spread of viruses that have been previously associated with disease severity and treatment failure.
- Senne Heeren
- , Ilse Maes
- & Frederik Van den Broeck
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Article
| Open AccessEdge effects on tree architecture exacerbate biomass loss of fragmented Amazonian forests
Forest responses can have major effects on tree architecture and community structure near the edges of forest fragments. Here, using terrestrial LiDAR scanning data from long-term forest plots, the authors find a net negative effect of fragmentation on Amazonian Forest aboveground biomass.
- Matheus Henrique Nunes
- , Marcel Caritá Vaz
- & Eduardo Eiji Maeda
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Article
| Open AccessChronic exposure to environmental temperature attenuates the thermal sensitivity of salmonids
This study uses in situ respirometry assays and transplant experiments with salmonid fish to disentangle the effects of chronic and acute thermal exposure. They show that chronic exposure to warming can attenuate salmonid thermal sensitivity, highlighting the need to incorporate the potential for thermal acclimation or adaptation when forecasting global warming consequences.
- Alexia M. González-Ferreras
- , Jose Barquín
- & Eoin J. O’Gorman
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