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opencc-by-4.0May 2019View details →

Development of a versatile source apportionment analysis based on positive matrix factorization: a case study of the seasonal variation of organic aerosol sources in Estonia

This work presents an advanced source apportionment approach that estimates the uncertainties of the positive matrix factorization model. The selection of the environmentally meaningful solutions is challenging in such models and a systematic approach to identify and sort the factors is important. We applied this method to a novel data set covering one yearly cycle at three sites in Estonia. The main results showed that biomass burning dominates in winter, while biogenic sources prevail in summer.

opencc-by-4.0Dec 2023View details →

Sperm competition drives variation in testis size within and between breeding seasons in the gracile mouse opossum

Data set on Gracilinanus agilis (Didelphimorphia: Didelphidae) with a reproducible script.

opencc-by-4.0Mar 2024View details →

Seasonal and spatial variation of paraben concentrations in urban coastal waters from freshwater lagoons to the open ocean of Brazil

Open the record for dataset details and reuse information.

opencc-zeroNov 2021View details →

Data from: Seasonal variation in resource selection by subadult golden eagles in the Great Basin Desert

Golden eagles (Aquila chrysaetos) are a long-lived and wide-ranging species believed to be stable or in slight decline across North America. Golden eagles have an extended subadult stage (4–5 years) that is critical to maintaining recruitment into the breeding population and population viability. We investigated patterns of resource selection for subadults in the Great Basin Desert of the western United States during summer and winter, 2013–2019. We monitored 46 subadults with GPS transmitters and related locations (n = 99,037) with predictors hypothesized to influence seasonal patterns of space use with mixed-effects logistic regression.

opencc-by-4.0Nov 2021View details →

Spatio-temporal variation in dry season determines the Amazonian fire calendar

Spatio-temporal variation in dry season determines the Amazonian fire calendar Contact: nsc.nathaliacarvalho@gmail.com Data repository for the paper: Carvalho et al. Spatio-temporal variation in dry season determines the Amazonian fire calendar. Environmental Research Letters (2021). Background: Fire is one of the main anthropogenic drivers that threatens the Amazon. Despite the clear link between rainfall and fire, the spatial and temporal relationship between these variables is still poorly understood in the Amazon. We stratified the Amazon basin according to the dry season onset/end and investigated its relationship with the spatio-temporal variation of fire. We found well-defined seasonal fire patterns related to variation of the dry season end.  Fire Amazonian Calendar: Our results and maps are also available in a user-friendly interface (<a href="http://amazonianfirecalendar.shinyapps.io/fire_amazon/">amazonianfirecalendar.shinyapps.io/fire_amazon/</a>).  Dataset: Rasters files of the dry season (onset, end, length) and fire dynamics (Monthly percentage of fire in the peak month, Fire peak month and Critical Fire Period). Coverage: Amazon basin Spatial resolution: 10km Coordinate reference system: South America Albers Equal Area Conic with Datum SAD69 For the use of this dataset, please cite: Carvalho, N. S.; Anderson L. O.; Nunes C. A.; Pessôa, A. C.M.; Silva Junior, C. H. L., Reis, J.B.C.; Shimabukuro, Y. E.; Berenguer E.; Barlow J. and Aragão, L. E. O. C. Spatio-temporal variation in dry season determines the Amazonian fire calendar. Environmental Research Letters (2021). <a href="https://doi.org/10.1088/1748-9326/ac3aa3">https://doi.org/10.1088/1748-9326/ac3aa3</a>

opencc-zeroNov 2021View details →

The impact of indoor residual spraying on Plasmodium falciparum microsatellite variation in an area of high seasonal malaria transmission in Ghana, West Africa

Here, we report the first population genetic study to examine the impact of indoor residual spraying (IRS) on Plasmodium falciparum in humans. This study was conducted in an area of high seasonal malaria transmission in Bongo District, Ghana. IRS was implemented during the dry season (November-May) in three consecutive years between 2013 and 2015 to reduce transmission and attempt to bottleneck the parasite population in humans towards lower diversity with greater linkage disequilibrium. The study was done against a background of widespread use of long-lasting insecticidal nets, typical for contemporary malaria control in West Africa. Microsatellite genotyping with 10 loci was used to construct 392 P. falciparum multilocus infection haplotypes collected from two age-stratified cross-sectional surveys at the end of the wet seasons pre- and post-IRS. Three-rounds of IRS, under operational conditions, led to a >90% reduction in transmission intensity and a 35.7% reduction in the P. falciparum prevalence (p < .001). Despite these declines, population genetic analysis of the infection haplotypes revealed no dramatic changes with only a slight, but significant increase in genetic diversity (He : pre-IRS = 0.79 vs. post-IRS = 0.81, p = .048). Reduced relatedness of the parasite population (p < .001) was observed post-IRS, probably due to decreased opportunities for outcrossing. Spatiotemporal genetic differentiation between the pre- and post-IRS surveys (D = 0.0329 [95% CI: 0.0209 - 0.0473], p = .034) was identified. These data provide a genetic explanation for the resilience of P. falciparum to short-term IRS programmes in high-transmission settings in sub-Saharan Africa.

opencc-zeroFeb 2022View details →

Patterns of Testosterone in Male White-tailed Deer (Odocoileus virginianus): Seasonal and Lifetime Variation

Testosterone is strongly associated with the annual development of antlers in cervids, but. endocrine research on wild, freely breeding ungulates is often done without repeated capture of known-aged individuals. As a result, our knowledge on how testosterone fluctuates over the course of a lifetime and variation in lifetime patterns among individuals is limited. We investigated patterns of testosterone in a freely breeding population of white-tailed deer (Odocoileus virginianus) in Alabama, USA that breeds in January. Testosterone peaked during the height of the breeding season, despite this period occurring approximately two months later than in most temperate-region, white-tailed deer populations. Age-related differences in testosterone were only prevalent during the breeding season, with bucks ≥3.5 years old having greater testosterone (853 ng/dl ±96 SE; P = 0.012) than bucks 1.5–2.5 years old (364 ng/dl ±100 SE). Additionally, an individual's testosterone level as a yearling was not positively associated with their lifetime maximum testosterone level (P = 0.583), and an individual's mean testosterone level was positively associated with lifetime testosterone variation (P < 0.001). To our knowledge our study is one of the first to assess how testosterone early in life might relate to individual testosterone later in life. We believe these data provide insight into lifetime hormonal patterns in cervids, and that these patterns may indicate intraspecific variation of lifetime reproductive strategies.

opencc-zeroMar 2022View details →

Data from: Seasonal and functional variation in the trophic base of intermittent Alpine streams

In high-altitude Alpine streams, seasonal cycles of snowmelt, glacial melt, and rainfall drive variation in the availability of algal food resources. Yet high-altitude streams also exhibit varying degrees of flow intermittency, from solely winter-drying streams to others that dry periodically throughout summer and autumn. These environmental drivers may interact in different ways to determine the functional trophic base of macroinvertebrates inhabiting high-altitude streams. Here, we estimated the proportional contribution of autochthonous resources to the assimilated diets of benthic macroinvertebrates in 26 headwater streams of Val Roseg, a high Alpine glacial catchment, using stable isotope analysis (δ13C and δ15N) of different macroinvertebrate families and their potential food sources. We compared dietary estimates along a gradient of flow intermittency and across 3 seasons (Alpine spring, summer and autumn). Assimilation from autochthonous sources was highest for collector-gatherers and filter feeders in spring, and for grazers in summer. Grazers had higher estimated assimilation from autochthonous sources in intermittent streams than in perennial streams, particularly in summer, while collector-gatherers showed little effect of flow intermittency on dietary estimates. However, responses were highly taxon-specific, with different responses to variation in flow intermittency and season across families within functional groups. Our results suggest that frequent summer drying events represent trade-offs between greater access to algal food resources and a higher risk of desiccation, but that differing life-history and functional feeding traits across macroinvertebrate taxa drive marked variation in the risks or benefits associated with inhabitants of drying streams.

opencc-zeroMar 2022View details →

Data from: Prairie dogs, cattle subsidies, and alternative prey: Seasonal and spatial variation in coyote diet in a temperate grassland

As the dominant predator on North America's grasslands, coyotes (Canis latrans) have a large influence on biodiversity, both on working ranches and in protected parks. Ground squirrel (sciurid) species and livestock carrion are often abundant on grasslands worldwide and have the potential to influence a predator's consumption of alternative prey. We collected 1321 scats in four seasons over two years in and adjacent to Grasslands National Park, Saskatchewan, to test the hypothesis that seasonal and spatial variation in consumption of sciurid prey and cattle (Bos taurus) carrion influenced coyote consumption of alternative prey. Sciurid (black-tailed prairie dog Cynomys ludovicianus and Richardson's ground squirrel Urocitellus richardsonii) remains were common from spring to fall and had a strong inverse relationship with deer (mule deer Odocoileus hemionus and white-tailed deer O. virginianus), which were most common in winter scats. Cattle remains were most common during spring, fall and winter, occurring in 10.6% of scats annually. Biomass estimates indicated that cattle was the highest ranked food on cattle grazing land year-round, and the 2nd ranked food, after deer, during winter on the portion of the park from which cattle were excluded. Closer proximity of scats to a prairie dog colony increased the likelihood of prairie dog remains throughout the year and reduced the likelihood of cattle remains in scats from spring to fall, but not during winter. Individual differences in foraging and ranging behavior may explain the spatial distribution of prairie dog versus cattle in scats. Further work is needed to determine whether sciurid prey, deer, or livestock carrion support large predator populations on grassland habitats to a level that may negatively affect coexisting prey species, including species at risk.

Figure 2 in Seasonal variation in frog predation by black lion tamarins (Leontopithecus chrysopygus, Primates)

Figure 2. (a) Leontopithecus chrysopygus preying on an individual of Scinax fuscovarius; (b) partially eaten individual of Boana faber; (c) schematic drawing of L. chrysopygus preying on a frog, made based on field observations and notes. (Illustration: Gustavo Libardi, used with permission).

Figure 4 in Seasonal variation in frog predation by black lion tamarins (Leontopithecus chrysopygus, Primates)

Figure 4. Monthly variation in frog predation by Leontopithecus chrysopygus and in precipitation, through the studied period (2014–2019). Values for April were not considered (see text for explanation).

Figure 1 in Seasonal variation in frog predation by black lion tamarins (Leontopithecus chrysopygus, Primates)

Figure 1. Study sites in the state of São Paulo, Brazil. Graphs show the rainfall (bars) and mean temperature (lines) obtained from the Brazilian National Institute for Meteorology database (https:// portal.inmet.gov.br/).

Figure 3 in Seasonal variation in frog predation by black lion tamarins (Leontopithecus chrysopygus, Primates)

Figure 3. (a) Plot of principal component analysis (PCA) scores; (b) plot of PCA loadings for PC1 vs PC2. The stars (green) represent the dry season months and the upside-down triangles (red) represent the rainy season months.

opencc-by-4.0Jul 2022View details →

ERA-I version data for the paper "Role of Vertical Mixing in the Upper Ocean in the Seasonal Variation of Arctic Amplification"

All the data, used to draw figures in the manuscript are uploaded. The variables' description have been well defined in the manuscript.

opencc-by-4.0Jun 2024View details →

On the layered structure and Seasonal Variation of the Water Exchanges in the Sulawesi Sea Areas as well as the associated dynamics

The layered structure and seasonal variation of the water exchanges in the Sulawesi Sea areas, as well as the corresponding dynamics, are investigated using HYCOM data. A net inward water mass transport is identified in the upper and intermediate layers in the Sulawesi Sea and it is compensated by the net outward transport in the deep layer. As an important source of this net inward transport, the southward flow through the Sibutu Passage (denoted hereafter as Sibutu Flow) reaches 5.06Sv in winter, accounting for ~43% of the net inflow. However, it decreases substantially to 1.79Sv in summer, accounting for only 12% of the inflow. Further analysis reveals that this Sibutu Flow modulates the seasonal variation of the corresponding outward flow at the Makassar Strait, the major exit of the water mass in the Sulawesi Sea. In winter, the enhancement of the Sibutu Flow associated with the greater intrusion of Kuroshio water into the Luzon Strait produces a stronger eastward pressure gradient force, suppressing the surface intrusion of the Mindanao Current. Conversely, this pressure gradient force weakens and shifts westward in summer, permitting a larger water intrusion from the eastern section. Given that the outward Makassar Flow is the main passage of the Indonesian Throughflow (ITF), our study highlights the essential role of the Sibutu Flow in modulating seasonal variabilities of the ITF via the Makassar Strait and, thus, the transfer of water masses and heat content between the Pacific and Indian Oceans.

opencc-by-4.0Jul 2024View details →

Seasonal Variations of Microbial Communities and Viral Diversity in Fishery-Enhanced Marine Ranching Sediments: Insights into Metabolic Potentials and Ecological Interactions

Sediment samples were collected in four seasons from May 2022 to January 2023 from the Tian coastal marine ranching (36°91′ N and 122°15′ E) located along Jinghai Bay in Weihai City, Shandong Province, China. We employed amplicon (16S and 18S) and metagenomic approaches aiming to reveal the seasonal patterns of microbial communities, bacterial-eukaryotic interactions, whole metabolic potential, and their coupling mechanisms with carbon (C), nitrogen (N), and sulfur (S) cycling in marine ranching sediments. Additionally, the characterization and diversity of viral communities in different seasons were explored in marine ranching sediments.  This dataset mainly includes amplicon sequencing (16S and 18S) generated ASV tables (after rarefied), corresponding taxonomic classification tables, metagenome assembly (Single assembly and Co-assembly), metagenome-assembled genomes (MAGs) sequences, and viral operational taxonomic units (vOTUs) sequences.

opencc-by-4.0Dec 2018View details →

Seasonal variation of mortality, detectability and body condition in a population of the adder (Vipera berus)

Raw data used in paper by Dirk Bauwens & Katja Claus. 2019. Seasonal variation of mortality, detectability and body condition in a population of the adder (Vipera berus). Ecology and Evolution 9:5821–5834. DOI: 10.1002/ece3.5166      CH_data_Season_males.INP A text file with extension .INP for input in the program MARK (White & Burnham, 1999; Cooch & White, 2015), containing the capture-recapture histories of individual adult male adders (n = 1146). Each 52-digit string contains a 1-digit score (1/0 ; captured / not captured) per season (1-4) and year of study (2005 – 2017). CH_data_Season_females.INP A text file with extension .INP for input in the program MARK (White & Burnham, 1999; Cooch & White, 2015), containing the capture-recapture histories, including breeding status of individual adult female adders (n = 832). Each 39-digit string contains a 1-digit score (B/N/0 ; Breeding / Non-breeding / not captured) per season (1-3) and year of study (2005 – 2017).

opennotspecifiedMay 2018View details →

FIG. 2 in Spatial, Seasonal, and Sexual Variation in the Diet of Graptemys flavimaculata, a Threatened Turtle of the Pascagoula River System, Mississippi, USA

FIG. 2. Diets of male and female Graptemys flavimaculata from the Leaf (LR) and lower Pascagoula Rivers (PR) by season (Spring—dark gray, Summer—black, Fall—light gray). Prey items are sorted alphabetically with minor items not included.

opennotspecifiedMay 2018View details →

FIG. 1 in Spatial, Seasonal, and Sexual Variation in the Diet of Graptemys flavimaculata, a Threatened Turtle of the Pascagoula River System, Mississippi, USA

FIG. 1. Percent molluscivory of male and female Graptemys flavimaculata from the Leaf River (LR) and the lower Pascagoula River (PR).

Fig. 2 in Seasonal Variations in the Assembly of Dung Beetles (Coleoptera: Geotrupidae and Scarabaeidae) Attracted to Macaque Feces in Temperate Forests in Japan

Fig. 2. Monthly capture rates (number of traps in which dung beetles were captured/total number of trap nights) of dung beetles on Kinkazan and Yakushima Islands, Japan. No sampling was done during June and September on Kinkazan, and during May on Yakushima. Numbers above the bars are the number of trap nights.