cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5061/dryad.r8h3n
title: Data from: Optic flow odometry operates independently of stride integration in carried ants

description: Cataglyphis desert ants are impressive navigators. When the foragers roam
 the desert, they employ path integration. For these ants, distance
 estimation is one key challenge. Distance information was thought to be
 provided by optic flow (OF)—that is, image motion experienced during
 travel—but this idea was abandoned when stride integration was discovered
 as an odometer mechanism in ants. We show that ants transported by nest
 mates are capable of measuring travel distance exclusively by the use of
 OF cues. Furthermore, we demonstrate that the information gained from the
 optic flowmeter cannot be transferred to the stride integrator. Our
 results suggest a dual information channel that allows the ants to measure
 distances by strides and OF cues, although both systems operate
 independently and in a redundant manner.
description: OF
 experimentTurning points of homing
 ants walking in a channel set-up. The ants were carried by a nest mate
 during outbound run. Collected in the field in Tunisia.IT
 experimentTurning points of homing
 ants walking in a channel set-up. The ants were blindfolded after carrying
 and before being tested in the channel. Collected in the field in
 Tunisia.BF
 experimentTurning points of homing
 ants walking in a channel set-up. The ants were blindfolded during
 carrying. Collected in the field in Tunisia.
DOI: 10.5061/dryad.3n15h
title: Data from: The tendinopathic Achilles tendon does not remain iso-volumetric upon repeated loading: insights from 3D ultrasound

description: Mid-portion Achilles tendinopathy (MAT) alters the normal
 three-dimensional (3D) morphology of the Achilles tendon (AT) at rest and
 under a single tensile load. However, how MAT changes the 3D morphology of
 the AT during repeated loading remains unclear. This study compared the AT
 longitudinal, transverse and volume strains during repeated loading of the
 tendinopathic AT with those of the contralateral tendon in people with
 unilateral MAT. Ten adults with unilateral MAT performed 10 successive
 25 s submaximal (50%) voluntary isometric plantarflexion contractions with
 both legs. Freehand 3D ultrasound scans were recorded and used to measure
 whole AT, free AT and proximal AT longitudinal strains and free AT
 cross-sectional area (CSA) and volume strains. The free AT experienced
 higher longitudinal and CSA strain and reached steady state following a
 greater number of contractions (five contractions) in the tendinopathic AT
 compared with the contralateral tendon (three contractions). Further, free
 tendon CSA and volume strain were greater in the tendinopathic AT than in
 the contralateral tendon from the first contraction, whereas free AT
 longitudinal strain was not greater than that of the contralateral tendon
 until the fourth contraction. Volume loss from the tendon core therefore
 preceded the greater longitudinal strain in the tendinopathic AT. Overall,
 these findings suggest that the tendinopathic free AT experiences an
 exaggerated longitudinal and transverse strain response under repeated
 loading that is underpinned by an altered interaction between solid and
 fluid tendon matrix components. These alterations are indicative of
 accentuated poroelasticity and an altered local stress–strain environment
 within the tendinopathic free tendon matrix, which could affect tendon
 remodelling via mechanobiological pathways.
description: Whole Achilles Tendon
 Longitudinal Elongation and Strain for the Contralateral and Tendinopathic
 SidesProximal Achilles Tendon
 Longitudinal Elongation and Strain for the Contralateral and Tendinopathic
 SidesFree Achilles Tendon
 Longitudinal Elongation and Strain for the Contralateral and Tendinopathic
 SidesFree Achilles Tendon
 Cross Sectional Area Deformation and Strain for the Contralateral and
 Tendinopathic SidesFree Achilles Tendon
 Volume Deformation and Strain for the Contralateral and Tendinopathic
 Sides
DOI: 10.5061/dryad.2ts54jj
title: Data from: Spatial modeling improves understanding patterns of invasive species defoliation by a biocontrol herbivore

description: Spatial modeling has proven to be useful in understanding the drivers of
 plant populations in the field of ecology, but has yet to be applied to
 understanding variation in biocontrol impact. In this study, we employ
 multi-scale analysis (Moran’s Eigenvector Maps) to better understand the
 variation in tree canopy exposed to defoliation by a biocontrol beetle
 (Diorhabda spp.). The control of the exotic tree Tamarix in riparian areas
 has long been a priority for land managers and ecologists in the American
 southwest. Diorhabda spp. was introduced as a bio-control agent beginning
 in 2001 and has since become an inseparable part of Tamarix-dominated
 river systems in the southwest. Between 2013 and 2016 tamarisk dieback was
 assessed at 79 sites across Grand County, Utah, arguably the epicenter of
 Diorhabda impact in the U.S. Canopy cover of Tamarix was between 73%-81%
 at these sites, with the percent that was live cover fluctuating by year
 with a minimum of 42%. Using a traditional general linear model, we found
 that readily and commonly measured environmental factors could explain
 only up to 26% of the variation in Tamarix live canopy each year,
 including that number of defoliations was correlated with an increase
 rather than a decrease in percent live canopy, suggesting compensatory
 growth. Spatial structure alone explained 22-40% of variation. We found
 fine scale spatial structure at less than 10 km and broad scale spatial
 structure from 10-30 km. Combining both traditional and novel spatial
 statistical methods we increased that percentage to 43-63%, depending on
 year. These results suggest that scientists and land managers must look
 beyond commonly measured environmental variables to explain non-random
 biocontrol impact in this system. In particular, this study points to the
 potential for biotic interactions and variation in flood cycles for
 further exploration of the identified spatial structure.
description: GC_defoliation_compiledThis dataset contains percent live canopy of Tamarix for Grand County, Utah. Live canopy is a site average for point intercept data collected along transects. There are 4 years of canopy data included. The dataset also includes values for environmental variables measured in 2014.
DOI: 10.5061/dryad.sp72p
title: Data from: Elephant damage, not fire or rainfall, explains mortality of overstorey trees in Serengeti

description: Generalizations about the drivers of tree demography in tropical savannahs
 continue to prove difficult because of the complex and dynamic
 interactions involved, and because multi-year datasets spanning meaningful
 gradients in potential drivers are lacking. Overstorey trees play
 disproportionate roles in the long-term dynamics and functioning of
 savannah ecosystems. Understanding demographic patterns in these trees is
 complicated by their resprouting ability after being top-killed and few
 studies have attempted to separate top-kill from true mortality events. We
 examined the interactive effects of fire frequency, mean annual
 precipitation and elephant herbivory on overstorey (&gt;2m) tree
 mortality between 2009 and 2014 across 32 permanent vegetation plots in
 the Serengeti Ecosystem, Tanzania. Mean tree mortality over the study
 period was 0.28 ± 0.02 (0.07 yr−1). Among trees that were top-killed
 (19.1% of all individuals), 31.2% resprouted. Mortality was driven largely
 by elephant herbivory, though mortality rates varied considerably across
 space and tree species. Fire frequency and mean annual rainfall were weak
 predictors of tree mortality. Over the five year period, chronic elephant
 herbivory (i.e., repeated through time) was a stronger predictor of tree
 mortality than maximum elephant herbivory, suggesting that repeated,
 low-intensity damage from elephants was more important to mortality than
 acute, but infrequent, damage. Elephants disproportionately damaged
 certain tree species relative to their availability on the landscape, and
 the tolerance to damage differed by species as well. Acacia senegal was
 strongly selected and appeared to have low tolerance to damage when it
 occurred, resulting in a mortality rate of 0.736 ± 0.052 (0.234 yr−1) over
 the study period. Topkilling and resprouting rates varied across species,
 with Acacias generally having low resprout rates. Synthesis. Our study
 highlights the considerable role that chronic herbivory plays in
 structuring savannah tree populations, irrespective of prevailing fire and
 rainfall conditions, and provides important vegetative context to the
 dramatic recent declines and (in the case of Serengeti) increases in
 savannah elephant densities in sub-Saharan Africa.
description: ELE_DAM_09-14_DRYADOverstorey tree survival (&gt;1.5m tall), fire (0/1) and elephant damage (0-10) over time.
DOI: 10.5061/dryad.7bq1q
title: Data from: Range expansion of the Asian native giant resin bee Megachile sculpturalis (Hymenoptera, Apoidea, Megachilidae) in France

description: In 2008, a new species for the French bee fauna was recorded in Allauch
 near Marseille: the giant resin bee, Megachile sculpturalis (Smith, 1853).
 This was the first European record of this species that is native to East
 Asia. To our knowledge, it is the first introduced bee species in Europe.
 Here, we provide an overview of the current distribution of M.
 sculpturalis in France and we describe the history of its range expansion.
 Besides our own observations, information was compiled from literature and
 Internet websites, and by contacting naturalist networks. We collected a
 total of 117 records (locality × year combinations) for the 2008-2016
 period. The geographical range of M. sculpturalis has extended remarkably,
 now occupying a third of continental France, with the most northern and
 western records located 335 and 520 km from Allauch respectively.
 Information on its phenology, feeding, and nesting behavior is also
 provided. We report several events of nest occupation or eviction of Osmia
 sp. and Xylocopa sp. individuals by M. sculpturalis. Our results show that
 M. sculpturalis is now well established in France. Given its capacity to
 adapt and rapidly expand its range, we recommend amplifying the monitoring
 of this species to better anticipate the changes in its geographical range
 and its potential impacts on native bees.
description: Megachile sculpturalis
 records in FranceMegachile sculpturalis
 records in France between 2008 and 2016Megachile
 sculpturalis_records_France.xlsx
DOI: 10.5061/dryad.22q68sq
title: Data from: Scale-dependent variation in nitrogen cycling and soil fungal communities along gradients of forest composition and age in regenerating tropical dry forests

description: Rates of ecosystem nitrogen (N) cycling may be mediated by the presence of
 ectomycorrhizal fungi, which compete directly with free‐living microbes
 for N. In the regenerating tropical dry forests of Central America, the
 distribution of ectomycorrhizal trees is affected by succession and soil
 parent material, both of which may exert independent influence over soil N
 fluxes. In order to quantify these interacting controls, we used a
 scale‐explicit sampling strategy to examine soil N cycling at scales
 ranging from the microsite to ecosystem level. We measured fungal
 community composition, total and inorganic N pools, gross proteolytic
 rate, net N mineralization and microbial extracellular enzyme activity at
 multiple locations within 18 permanent plots that span dramatic gradients
 of soil N concentration, stand age and forest composition. The ratio of
 inorganic to organic N cycling was correlated with variation in fungal
 community structure, consistent with a strong influence of ectomycorrhiza
 on ecosystem‐scale N cycling. However, on average, &gt; 61% of the
 variation in soil biogeochemistry occurred within plots, and the effects
 of forest composition were mediated by this local‐scale heterogeneity in
 total soil N concentrations. These cross‐scale interactions demonstrate
 the importance of a spatially explicit approach towards an understanding
 of controls on element cycling.
description: Waring_et_al_NewPhyt_biogeochemical_data_for_Dryad
DOI: 10.5061/dryad.031sf
title: Data from: Substitutions in the cardenolide binding site and interaction of subunits affect kinetics besides cardenolide sensitivity of insect Na,K-ATPase

description: Substitutions within the cardenolide target site of several insects'
 Na,K-ATPase α-subunits may confer resistance against toxic cardenolides.
 However, to which extent these substitutions alter the Na,K-ATPase's
 kinetic properties and how they interact with different β-subunits is not
 clear. The cardenolide-adapted milkweed bug Oncopeltus fasciatus possesses
 three paralogs of the α-subunit (A, B, and C) that differ in number and
 identity of resistance-conferring substitutions. We introduced these
 substitutions into the α-subunit of Drosophila melanogaster and combined
 them with the β-subunits Nrv2.2 and Nrv3. The substitutions
 Q111T-N122H-F786N-T797A (A-copy mimic) and Q111T-N122H-F786N (B-copy
 mimic) mediated high insensitivity to ouabain, yet they drastically
 lowered ATPase activity. Remarkably, the identity of the β-subunit was
 decisive and all α-subunits were less active when combined with Nrv3 than
 when combined with Nrv2.2. Both the substitutions and the co-expressed
 β-subunit strongly affected the enyzme's affinity for Na+ and K+. Na+
 affinity was considerably higher for all enzymes expressed with nrv3 while
 expression with nrv2.2 increased K+ affinity. Our results provide the
 first evidence that resistance against cardenolides comes at the cost of
 significantly altered kinetic properties of the Na,K-ATPase. The β-subunit
 can strongly modulate these properties but cannot fully compensate for the
 effect of the substitutions.
description: Raw data Na affinity
 Nrv2.2-alphasData on Na+ affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv2.2Raw data Na affinity
 Nrv3-alphasData on Na+ affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv3Raw data K affinity
 Nrv2.2-alphasData on K+ affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv2.2Raw data K affinity
 Nrv3-alphasData on K+ affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv3Raw Data ATP-affinity
 Nrv2.2-alphasData on ATP affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv2.2Raw Data ATP-affinity
 Nrv3-alphasData on ATP affinity of
 Na,K-ATPases consisting of mutant and wildtype D. melanogaster alpha
 subunits and the beta subunit Nrv3
DOI: 10.5061/dryad.7hq27
title: Data from: Sibling cooperation influences the age of nest leaving in an altricial bird

description: In altricial birds, siblings raised within a nest usually leave the nest
 within hours of each other, despite often differing considerably in age.
 The youngest members of the brood are typically underdeveloped at this
 time and less likely than their older siblings to survive outside the
 nest, yet they risk abandonment if they do not fledge with their older
 siblings. Nest leaving is usually initiated by the older offspring, which
 may delay this process to provide more time for their younger siblings to
 mature, increasing the younger siblings’ postfledging survival and their
 own inclusive fitness. We tested this hypothesis in a population of house
 wrens Troglodytes aedon and found that broods with broad age spans among
 siblings had longer nestling periods than broods with narrow age spans and
 that delayed fledging improves the survival and reproductive prospects of
 younger siblings, although at a potential cost to future siblings. We also
 manipulated age spans through cross-fostering and found that older foster
 nestlings postponed fledging when raised with younger broodmates, as
 predicted if the age of younger nestlings determines the time of fledging.
 Our results support kin-selection theory and demonstrate that the exact
 time of fledging is attributable, in part, to sib-sib interactions.
description: ALL_NESTSNESTS_2011YOUNGER_2011FEMALES
DOI: 10.5061/dryad.3j300
title: Data from: The ancient tropical rainforest tree Symphonia globulifera L. f. (Clusiaceae) was not restricted to postulated Pleistocene refugia in Atlantic Equatorial Africa

description: Understanding the history of forests and their species' demographic
 responses to past disturbances is important for predicting impacts of
 future environmental changes. Tropical rainforests of the Guineo-Congolian
 region in Central Africa are believed to have survived the Pleistocene
 glacial periods in a few major refugia, essentially centred on mountainous
 regions close to the Atlantic Ocean. We tested this hypothesis by
 investigating the phylogeographic structure of a widespread, ancient
 rainforest tree species, Symphonia globulifera L. f. (Clusiaceae), using
 plastid DNA sequences (cpDNA, psbA-trnH intergenic spacer) and nuclear
 microsatellites (SSRs). SSRs identified four gene pools located in Benin,
 West Cameroon, South Cameroon and Gabon, and São Tomé. This structure was
 also apparent at cpDNA. Approximate Bayesian Computation detected recent
 bottlenecks approximately dated to the last glacial maximum in Benin, West
 Cameroon and São Tomé, and an older bottleneck in South Cameroon and
 Gabon, suggesting a genetic effect of Pleistocene cycles of forest
 contraction. CpDNA haplotype distribution indicated wide-ranging long-term
 persistence of S. globulifera both inside and outside of postulated forest
 refugia. Pollen flow was four times greater than that of seed in South
 Cameroon and Gabon, which probably enabled rapid population recovery after
 bottlenecks. Furthermore, our study suggested ecotypic differentiation -
 coastal or swamp vs. terra firme - in S. globulifera. Comparison with
 other tree phylogeographic studies in Central Africa highlighted the
 relevance of species-specific responses to environmental change in forest
 trees.
description: Symphonia_globulifera_nSSR_data
DOI: 10.5061/dryad.2001
title: Data from: Incipient allochronic speciation in the pine processionary moth Thaumetopoea pityocampa (Lepidoptera: Notodontidae)

description: A plausible case of allochronic differentiation, where barrier to gene
 flow is primarily due to a phenological shift, was recently discovered in
 Portugal for the pine processionary moth Thaumetopoea pityocampa. Previous
 results suggested that the observed "summer population" (SP)
 originated from the sympatric winter population (WP). Our objectives were
 to finely analyse these patterns and test their stability in time, through
 field monitoring and genetic analyses of larvae and adults across
 different years. Reproductive activity never overlapped between SP and WP.
 Microsatellites showed a clear differentiation of the SP, consistent with
 a strong reduction of gene flow due to the phenological shift. Assignment
 tests suggested that some individuals shift from the SP to the WP
 phenology, causing some hybridization. We discuss these patterns and their
 maintenance over time. This could be a first stage of allochronic
 speciation and SP should be considered as a distinct phenological race.
description: Santos2010_JEB_DataDryad
DOI: 10.5061/dryad.mt0j5
title: Data from: Marine plastic pollution in waters around Australia: characteristics, concentrations, and pathways

description: Plastics represent the vast majority of human-made debris present in the
 oceans. However, their characteristics, accumulation zones, and transport
 pathways are still poorly assessed. We characterised and estimated the
 concentration of marine plastics in waters around Australia using surface
 net tows, and inferred their potential pathways using particle-tracking
 models and real drifter trajectories. The 839 marine plastics recorded
 were predominantly small fragments (“microplastics”, median length = 2.8
 mm, mean length = 4.9 mm) resulting from the breakdown of larger objects
 made of polyethylene and polypropylene (e.g. packaging and fishing items).
 Mean sea surface plastic concentration was 4256.4 pieces km-2, and after
 incorporating the effect of vertical wind mixing, this value increased to
 8966.3 pieces km-2. These plastics appear to be associated with a wide
 range of ocean currents that connect the sampled sites to their
 international and domestic sources, including populated areas of
 Australia’s east coast. This study shows that plastic contamination levels
 in surface waters of Australia are similar to those in the Caribbean Sea
 and Gulf of Maine, but considerably lower than those found in the
 subtropical gyres and Mediterranean Sea. Microplastics such as the ones
 described here have the potential to affect organisms ranging from
 megafauna to small fish and zooplankton.
description: nettows_infoplastics_info
DOI: 10.5061/dryad.mk3k3
title: Data from: Buzz factor or innovation potential: what explains cryptocurrencies' returns?

description: Cryptocurrencies have become increasingly popular since the introduction
 of bitcoin in 2009. In this paper, we identify factors associated with
 variations in cryptocurrencies’ market values. In the past, researchers
 argued that the “buzz” surrounding cryptocurrencies in online media
 explained their price variations. But this observation obfuscates the
 notion that cryptocurrencies, unlike fiat currencies, are technologies
 entailing a true innovation potential. By using, for the first time, a
 unique measure of innovation potential, we find that the latter is in fact
 the most important factor associated with increases in cryptocurrency
 returns. By contrast, we find that the buzz surrounding cryptocurrencies
 is negatively associated with returns after controlling for a variety of
 factors, such as supply growth and liquidity. Also interesting is our
 finding that a cryptocurrency’s association with fraudulent activity is
 not negatively associated with weekly returns—a result that further
 qualifies the media’s influence on cryptocurrencies. Finally, we find that
 an increase in supply is positively associated with weekly returns. Taken
 together, our findings show that cryptocurrencies do not behave like
 traditional currencies or commodities—unlike what most prior research has
 assumed—and depict an industry that is much more mature, and much less
 speculative, than has been implied by previous accounts.
description: Bitcoin, Litecoin,
 Peercoin, Ripple, Stellar (Sept 2014-Aug 2015)Weekly time series of
 cryptocurrency prices with various predictors, including technology, media
 buzz, liquidity, and supply.Wang & Vergne 2016_PLOS
 ONE_Crypto_dataset.dta