United States of America (USA)

1 December 2019 - 30 November 2020

Subject/journal group: All

The table to the right includes counts of all research outputs for United States of America (USA) published between 1 December 2019 - 30 November 2020 which are tracked by the Nature Index.

Hover over the donut graph to view the FC output for each subject. Below, the same research outputs are grouped by subject. Click on the subject to drill-down into a list of articles organized by journal, and then by title.

Note: Articles may be assigned to more than one subject area.

Count Share
28986 20575.61

Outputs by subject (FC)

Subject Count Share
Life Sciences 12951 9608.83
113 68.86
92 74.32
263 209.84
286 222.26
98 73.98
93 64.78
102 81.37
1 1
290 206.53
119 97.31
70 44.50
Greater local diversity under older species pools may arise from enhanced competitive equivalence
2020-11-20
1
Coevolution, diversification and alternative states in two‐trophic communities
2020-11-17
0.63
Changes in flight period predict trends in abundance of Massachusetts butterflies
2020-11-09
1
Combining multiple tactics over time for cost‐effective eradication of invading insect populations
2020-11-09
0.75
Soil fungal mycelia have unexpectedly flexible stoichiometric C:N and C:P ratios
2020-11-09
0.25
Species interactions have predictable impacts on diversification
2020-11-04
1
Global functional and phylogenetic structure of avian assemblages across elevation and latitude
2020-10-30
0.83
Long‐term change in the avifauna of undisturbed Amazonian rainforest: ground‐foraging birds disappear and the baseline shifts
2020-10-26
0.52
Clockwise and counterclockwise hysteresis characterize state changes in the same aquatic ecosystem
2020-10-20
1
Landscape simplification increases vineyard pest outbreaks and insecticide use
2020-10-13
0.80
A place to land: spatiotemporal drivers of stopover habitat use by migrating birds
2020-10-07
1
Adult survival probability and body size affect parental risk‐taking across latitudes
2020-10-07
1
Coexistence barriers confine the poleward range of a globally distributed plant
2020-10-06
1
Resource supply governs the apparent temperature dependence of animal production in stream ecosystems
2020-10-01
0.75
Flowering synchrony drives reproductive success in a wind‐pollinated tree
2020-09-27
0.20
Ecological and conceptual consequences of Arctic pollution
2020-09-25
0.04
Genetic correlations and ecological networks shape coevolving mutualisms
2020-09-24
0.17
Geographic mosaic of selection by avian predators on hindwing warning colour in a polymorphic aposematic moth
2020-09-02
0.07
A fingerprint of climate change across pine forests of Sweden
2020-08-28
0.06
Bee phenology is predicted by climatic variation and functional traits
2020-08-19
0.76
Biodiversity loss underlies the dilution effect of biodiversity
2020-08-18
0.33
Spatial covariance of herbivorous and predatory guilds of forest canopy arthropods along a latitudinal gradient
2020-08-18
0.29
Temporal stability vs. community matrix measures of stability and the role of weak interactions
2020-08-18
1
The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield: a quantitative synthesis
2020-08-18
0.30
Structural forecasting of species persistence under changing environments
2020-08-10
1
Reducing dispersal limitation via seed addition increases species richness but not above‐ground biomass
2020-06-21
0.14
Leaf size of woody dicots predicts ecosystem primary productivity
2020-06-01
0.21
Trophic control changes with season and nutrient loading in lakes
2020-05-31
0.71
Geomorphic transience moderates topographic controls on tropical canopy foliar traits
2020-05-25
1
High water use in desert plants exposed to extreme heat
2020-05-21
0.93
The functional roles of species in metacommunities, as revealed by metanetwork analyses of bird–plant frugivory networks
2020-05-20
0.14
Offspring polymorphism and bet hedging: a large‐scale, phylogenetic analysis
2020-05-13
1
Disease hotspots or hot species? Infection dynamics in multi‐host metacommunities controlled by species identity, not source location
2020-05-01
1
Landscape simplification shapes pathogen prevalence in plant‐pollinator networks
2020-04-28
0.86
Compensating for climate change–induced cue‐environment mismatches: evidence for contemporary evolution of a photoperiodic reaction norm in Colias butterflies
2020-04-24
0.75
Phosphorus supply shifts the quotas of multiple elements in algae and Daphnia : ionomic basis of stoichiometric constraints
2020-04-17
1
Quantifying the relative importance of variation in predation and the environment for species coexistence
2020-04-07
1
The worldwide impact of urbanisation on avian functional diversity
2020-04-07
0.15
Predators weaken prey intraspecific competition through phenotypic selection
2020-03-29
1
Optimisation of energetic and reproductive gains explains behavioural responses to environmental variation across seasons and years
2020-03-18
0.25
Predation risk shapes the degree of placentation in natural populations of live‐bearing fish
2020-03-12
0.30
Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands
2020-02-25
0.31
Life‐history strategy varies with the strength of competition in a food‐limited ungulate population
2020-02-23
0.20
Trait plasticity alters the range of possible coexistence conditions in a competition-colonisation trade-off
2020-02-21
1
Alpine grassland plants grow earlier and faster but biomass remains unchanged over 35 years of climate change
2020-02-12
0.25
Imperfect detection alters the outcome of management strategies for protected areas
2020-02-11
0.50
Skewed distributions of lifetime reproductive success: beyond mean and variance
2020-02-11
0.60
Support for the habitat amount hypothesis from a global synthesis of species density studies
2020-02-11
0.22
Metabolic rate is negatively linked to adult survival but does not explain latitudinal differences in songbirds
2020-01-28
0.80
Optimal germination timing in unpredictable environments: the importance of dormancy for both among‐ and within‐season variation
2020-01-28
0.33
The rescue effect and inference from isolation–extinction relationships
2020-01-25
1
Assessing seasonal demographic covariation to understand environmental‐change impacts on a hibernating mammal
2020-01-23
0.43
Neural hierarchical models of ecological populations
2020-01-23
1
Relationships between population densities and niche‐centroid distances in North American birds
2020-01-15
0.38
Local forest structure variability increases resilience to wildfire in dry western U.S. coniferous forests
2020-01-10
0.93
Resource diversity promotes among‐individual diet variation, but not genomic diversity, in lake stickleback
2020-01-09
1
A chemically triggered transition from conflict to cooperation in burying beetles
2020-01-07
0.14
Sensitivity of primary production to precipitation across the United States
2020-01-07
1
Extensive mismatches between species distributions and performance and their relationship to functional traits
2020-01-01
1
Biotic resistance to invasion is ubiquitous across ecosystems of the United States
2019-12-25
1
The new kid on the block: immigrant males win big whereas females pay fitness cost after dispersal
2019-12-12
0.17
Agricultural intensification drives changes in hybrid network robustness by modifying network structure
2019-12-08
1
Can network metrics predict vulnerability and species roles in bird‐dispersed plant communities? Not without behaviour
2019-12-08
0.20
Mismatched outcomes for biodiversity and ecosystem services: testing the responses of crop pollinators and wild bee biodiversity to habitat enhancement
2019-12-04
0.90
Shared morphological consequences of global warming in North American migratory birds
2019-12-04
1
Substrate stoichiometry determines nitrogen fixation throughout succession in southern Chinese forests
2019-12-04
0.20
A novel application of the Price equation reveals that landscape diversity promotes the response of bees to regionally rare plant species
2019-12-01
0.83
Angiosperm symbioses with non‐mycorrhizal fungal partners enhance N acquisition from ancient organic matter in a warming maritime Antarctic
2019-12-01
0.03
Evenness effects mask richness effects on ecosystem functioning at macro‐scales in lakes
2019-12-01
1
Prolonged exposure to manure from livestock‐administered antibiotics decreases ecosystem carbon‐use efficiency and alters nitrogen cycling
2019-12-01
0.89
1 0.44
72 61.25
98 69.18
88 68.97
789 660.54
139 109.68
370 282.30
123 83.23
416 350.22
180 140.73
162 112.95
477 328.90
99 78.77
72 51.49
109 84.90
2186 1421.72
92 55.28
1 0.83
78 51.61
153 105.50
74 60.03
108 85.85
81 64.61
213 182.14
156 106.03
284 216.28
1922 1480.98
265 182.56
328 233.82
699 499.53
217 169.33
99 47.48
118 85.79
71 40.81
1084 890.33
Earth & Environmental Sciences 4341 2853.57
Chemistry 7235 5250.77
Physical Sciences 8259 5364.59

1 December 2019 - 30 November 2020

View the connected world of international research collaboration. Visualize collaborations by subject or region.

Collaborations between countries

Percentage of collaboration by Share

Hover over the graph to view the percentage of collaboration.

Top 10 collaborators by Share

  • United States of America (USA)
  1. China (4420.77)
    2106.75
    2314.03
  2. 1144.34
    831.17
  3. Germany (1914.97)
    1082.34
    832.63
  4. Canada (1205.80)
    753.10
    452.71
  5. France (1078.91)
    656.65
    422.26
  6. Japan (974.94)
    598.68
    376.26
  7. Australia (712.66)
    427.56
    285.10
  8. Switzerland (698.47)
    414.10
    284.37
  9. South Korea (697.43)
    420.77
    276.66
  10. Italy (582.81)
    354.79
    228.01

Collaboration is determined by the combined fractional count (Share) of United States of America (USA) and the collaborating country.

Top 10 institutions from United States of America (USA)

Institution Count Share
1. Harvard University 2535 914
2. Stanford University 1694 647.18
3. Massachusetts Institute of Technology (MIT) 1828 528.46
4. National Institutes of Health (NIH) 1085 404.29
5. University of California, Berkeley (UC Berkeley) 1297 395.84
6. University of Michigan (U-M) 1010 391.33
7. Yale University 987 350.79
8. University of California, San Diego (UC San Diego) 1003 342.66
9. Columbia University in the City of New York (CU) 1027 327.89
10. University of California, Los Angeles (UCLA) 1114 327.29

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