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opencc-zeroOct 2023View details →

Data from: one ant's trash is another ant's treasure: army ant middens provide resources for diverse ant assemblages

The army ant Eciton burchellii boasts more animal associates than any other animal species yet described, but the relationship between army ants and other ant species has only been studied in the context of predation. The waste deposits (middens) of army ant colonies are nitrogen-rich, a potentially high-value nutrient source for leaflitter arthropods. We explored this bottom-up role of army ant middens in the context of tropical ant communities. Our three main questions were 1) Which ant species forage on army-ants middens? 2) How does the bi-phasic life cycle of army ant colonies (affecting midden size, persistence, and abundance) affect which and how many ant species a midden boasts? 3) How do the ants that forage on army ant middens differ across elevations? Across 39 bivouacs we found 36 species of ants foraging on army ant middens. These included highly predatory ants, nitrogen-limited arboreal ants, and fungus-farming ants. Per-midden richness was significantly lower for the usually smaller middens deposited during the nomadic phase and was higher for the typically larger middens deposited during the statary phase. Per-midden richness was not significantly different across elevations, but there was far greater species turnover across elevations than across phases within the same elevational site. Our results suggest that army ant middens are an important resource for a wide variety of tropical ants, informing a better understanding of the complex network of associations revolving around this keystone species.

opencc-zeroOct 2023View details →

Data from: Predator-driven behavioral shifts in a common lizard shape resource-flow from marine to terrestrial ecosystems

We conducted a field experiment to assess foraging niche dynamics of semiarboreal brown anole lizards in the presence/absence of predatory ground-dwelling curly tailed lizards in a replicated set of island ecosystems. Data used in this study includes ecological infomration for the replicated islands of study (i.e. relative arthropod and seaweedabundances) together with phenotypic data of the lizards studied (body mass, size, body condition, as well as behavioral traits describing risk-taking behavior) as well as habitat use data and marine component of diet as a surrogate of the diet of these lizards. One year after experimental translocation, brown anoles exposed to these predators increased perch height and reduced consumption of marine-derived food resources. We also use this dataset to investigate if this foraging niche shift altered marine-to-terrestrial resource-flow dynamics and persisted in the diets of the first-generation offspring. Finally, we also assessed if lizards that displayed more risk-taking behaviors consumed more marine prey on islands with predators present.

opencc-zeroNov 2023View details →

Floral resource availability and honeybee flower visitations in Oslo, Norway

Urban green infrastructure can provide important habitats for pollinators and support urban ecosystem services. Therefore, these areas must be managed to maximize biodiversity and density of pollinating insects. We used DNA metabarcoding to study honeybee pollen resource use over time and space in the city of Oslo, Norway, and to assess the role of green infrastructure as a resource for pollinators and the services they generate. Urban honeybees used diverse pollen resources throughout their active season. There was considerable seasonal turnover in pollen resource use that reflected flowering phenology. Non-native plants (including invasive species) were an important resource early in the season but were replaced by native plants later in the season. Hive location was not strongly correlated with resource use, likely indicating effective long-distance foraging in the fragmented urban landscape. However, flower visitation rates and floral resource density in public urban green spaces were coupled with pollen use. Honeybees collected pollen from a small number of preferred species but also visited other species, likely for nectar. To preserve pollinator services, urban planning should consider flower resource management, with particular focus on planting native species that can act as early season resources for bees. Public campaigns and other incentive mechanisms to promote the cultivation of native plants that are resources for pollinators and the protection of urban semi-natural habitats have the potential to enhance the value of green infrastructure to support urban pollinators and pollination services.

opencc-by-4.0Nov 2023View details →

Additional resources for "Day ahead electricity price forecasting with neural networks - one or multiple outputs?"

Open the record for dataset details and reuse information.

opencc-by-4.0Nov 2023View details →

Selection of summer feeding sites and food resources by female migratory caribou (Rangifer tarandus) determined using camera collars

Female migratory caribou (Rangifer tarandus) depend on the availability of summer habitat resources to meet the needs associated with lactation and the accumulation of fat reserves to survive when resources are less abundant. Because of the large scales at which habitat and resource data are usually available, information on how female migratory caribou select habitat and resources at fine scales in the wild is lacking. To document selection of summer feeding sites, we equipped 52 female caribou with camera collars from 2016 to 2018. We collected a total of 65,150 10-sec videos between June 1st and September 1st for three years with contrasted spring phenology. We determined the selection at the feeding site scale (3rd scale of Johnson) and food item scale (4th scale of Johnson) using resource selection probability functions. This data base contains the data of the behaviors observed, habitat used as feeding site, habitat unused has habitat, consumed and unconsumed resources, insect presence and other variables.

opencc-by-4.0Nov 2023View details →

Supplemental data to AALE 2024 publication "Adaptive manufacturing: dynamic resource allocation using multi-agent reinforcement learning"

Release as supplementary material for our contribution at AALE 2024: "Adaptive manufacturing: dynamic resource allocation using multi-agent reinforcement learning" The evaluation datasets stored in this collection are used to compare the performance of multi-agent reinforcement learning. In addition, the performance of other methods such as (meta-) heuristic algorithms or single agent reinforcement learning algorithms or novel methods of search space reduction can also be compared.

opencc-zeroNov 2023View details →

Factors shaping the abundance of two butterflies sharing resources and enemies across a biogeographic region

Aim: Intra-specific variation in species relative abundance is shaped by a complex interplay of abiotic and biotic factors, making it both necessary and challenging to assess their combined relative importance in explaining variations across space and time. We used two congeneric butterfly species for which extensive count data and a deep understanding of their natural history are available to test three hypotheses explaining intra-specific variation in their abundance: (H1) seasonal dispersal behaviour driven by climate, (H2) resource availability, and (H3) apparent competition mediated via shared parasitoids. Taxon: Gonepteryx rhamni (Brimstone) and G. cleopatra (Cleopatra). Location: NE Iberian Peninsula, where both species coexist, and a nearby archipelago (Balearic Islands), where only Cleopatra occurs. Methods: We analyzed spatial abundance variations for both species in the mainland and island-mainland differences in the abundance of Cleopatra. Abiotic and biotic factors, including temperature, host plant and overwintering habitat availability, larval parasitism and density dependence were tested to explain the observed variations. Results: H1 can explain variation in butterfly abundance between mainland regions since in warmer summers populations increased in cooler areas but decreased in warmer areas. H2 explains the variation within mainland climate regions with a strong positive relationship between resource availability and abundance but is unlikely to explain the island-mainland variation in the abundance of Cleopatra. H3 could neither explain biogeographical variation in abundance because although richer parasitoid communities were found on the mainland, larval mortality rates were similar or lower on the mainland than in the islands. Main conclusions: Climate and resource availability jointly account for variation in butterfly abundance across the mainland, but neither these factors nor parasitism can explain island-mailand differences. Both coexisting butterfly species and their larval parasitoids may have undergone evolutionary processes, resulting in spatial segregation that promotes the coexistence of the two butterfly species on the mainland.

opencc-zeroDec 2023View details →

Supporting data for: The de novo genome of the Black-necked Snakefly (Venustoraphidia nigricollis Albarda, 1891): A resource to study the evolution of living fossils

Snakeflies (Raphidioptera) are the smallest order of holometabolous insects that have kept their distinct and name-giving appearance since the Mesozoic, probably since the Jurassic, and possibly even since their emergence in the Carboniferous, more than 300 million years ago. Despite their interesting nature and numerous publications on their morphology, taxonomy, systematics, and biogeography, snakeflies have never received much attention from the general public, and only a few studies were devoted to their molecular biology. Due to this lack of molecular data, it is therefore unknown, if the conserved morphological nature of these living fossils translates to conserved genomic structures. Here, we present the first genome of the species and of the entire order of Raphidioptera. The final genome assembly has a total length of 669 Mbp and reached a high continuity with an N50 of 5.07 Mbp. Further quality controls also indicate a high completeness and no meaningful contamination. The newly generated data was used in a large-scaled phylogenetic analysis of snakeflies using shared orthologous sequences. Quartet score and gene-concordance analyses revealed high amounts of conflicting signals within this group that might speak for substantial incomplete lineage sorting and introgression after their presumed re-radiation after the asteroid impact 66 million years ago. Overall, this reference genome will be a door-opening dataset for many future research applications, and we demonstrated its utility in a phylogenetic analysis that provides new insights into the evolution of this group of living fossils.

opencc-by-4.0Dec 2023View details →

Finding Open Educational Resources and Courses

This is a flyer designed for the CLARIN Annual Conference 2023 to raise awareness about the platforms available within the CLARIN and DARIAH research infrastructures to create, host and disseminate open learning and training resources, such as the <a href="https://www.clarin.eu/content/learning-hub">CLARIN Learning Hub</a>, <a href="https://campus.dariah.eu/">DARIAH Campus</a>,<a href="https://teach.dariah.eu/"> #dariahTeach</a>, <a href="https://marketplace.sshopencloud.eu/">SSH Open Marketplace</a>, <a href="https://dhcr.clarin-dariah.eu/info">DH Course Registry</a> and the learning resources developed in the <a href="https://upskillsproject.eu/deliverables/io3/upskills_learning_materials/">UPSKILLS project</a>.

opencc-by-4.0Dec 2023View details →

Repository of fact-checking websites and resources to combat climate mis/disinformation

This dataset is the result of collaborative work for Deliverable 1.3 (WP1; T1.3) of the AGORA project. It compiles a list of fact-checking websites and resources dedicated to debunking climate change mis/disinformation. The identification of these resources was achieved by leveraging the expertise of our consortium and, therefore, most of the resources listed are in English, German, Italian and Spanish.

opencc-by-4.0Jan 2023View details →

Resource competition predicts assembly of in vitro gut bacterial communities

Microbiota dynamics arise from a plethora of interspecies interactions, including resource competition, cross-feeding, and pH modulation. The individual contributions of these mechanisms are challenging to untangle, especially in natural or complex laboratory environments where the landscape of resource competition is unclear. Here, we developed a framework to estimate the extent of multi-species niche overlaps by combining metabolomics data of individual species, growth measurements in pairwise spent media, and mathematical models. When applied to an in vitro model system of human gut commensals in complex media, our framework revealed that a simple model of resource competition described most pairwise interactions. By grouping metabolomic features depleted by the same set of species, we constructed a coarse-grained consumer-resource model that predicted assembly compositions to reasonable accuracy. Moreover, deviations from model predictions enabled us to identify and incorporate into the model additional interactions, including pH-mediated effects and cross-feeding, which improved model performance. In sum, our work provides an experimental and theoretical framework to dissect microbial interactions in complex in vitro environments.

opencc-zeroDec 2023View details →

Body-size dependent effects of landscape-level resource energetics on pollinator abundance in woodland remnants

Land use change reduces floral resource availability, thereby driving declines in important pollinators. However, the severity of land use impact varies by species, influenced by factors such as dispersal ability and resource specialization, both of which can correlate with body size. Here we test whether floral resource availability in the surrounding landscape (the 'matrix') influences bee species' abundance in isolated remnant woodlands, and whether this effect varies with body size. We sampled quantitative flower-visitation networks within woodland remnants and quantified floral energy resources (calories) available to each bee species both within woodland and the matrix. Bee abundance in woodland increased with floral energy resources in the surrounding matrix, with strongest effects on larger-bodied species. Our findings suggest important but size-dependent effects of declining matrix floral resources on the persistence of bees in remnant woodlands, highlighting the need to incorporate landscape-level floral resources in conservation planning for pollinators in threatened natural habitats.

opencc-by-4.0Sep 2023View details →

Resource Usage and Optimization Opportunities in Workflows of GitHub Actions - Artifact

This package contains the data, the code used for collection and the analysis notebooks used to obtain the results presented in the paper: "Resource Usage and Optimization Opportunities in Workflows of GitHub Actions" published at ICSE2024.

Evaluating bottom-up forcing of a rocky intertidal resource harvest on a high trophic-level consumer group

The importance of ecosystem-based management (EBM) frameworks for resource harvest has increased over the past several decades as ecosystems face numerous anthropogenic stressors. In these frameworks, resource managers must consider the suite of interactions that comprise food webs and how resource harvest drives responses in non-target organisms. In rocky intertidal zones along North Atlantic coastlines, rockweed (Ascophyllum nodosum)—a canopy-forming brown seaweed—has been commercially harvested for centuries, yet most research on the effects of harvest have focused on the responses of the target resource and the macroinvertebrate assemblage. In this study, we used a Before-After Control-Impact experiment to assess the bottom-up effects of commercial rockweed harvest on a high trophic-level consumer group (birds) in Maine (USA). Overall, there was no evidence for strong bottom-up forcing of rockweed harvest on birds' site visitation. There was a small (fewer than two birds) positive effect size of harvest during the one-year post-harvest recovery interval. Several of the trends observed for the full bird assemblage appear to be driven more strongly by the low tide than the high tide bird assemblage. Independent of treatment, site visitation by birds was low in our study (60% of surveys recorded no birds) and highlights questions about the use of rocky intertidal habitats relative to other habitat types in coastal birds' home ranges. To our knowledge, there are no comparable assemblage-level bird studies in this system that can provide context to our results. Further research on coastal birds' habitat use within home ranges and food-web connections with rockweed-associated macroinvertebrates is needed to more confidently incorporate this high trophic-level consumer group into an EBM framework for a rocky intertidal resource harvest.

Microsatellite exploration in the climbing hydrangea (Hydrangea petiolaris Siebold & Zucc.) transcriptome: A resource for population genetics and functional genomics

Background Hydrangea petiolaris Siebold & Zucc., also known as climbing hydrangea, is a vine native to the woodlands of Korea, Japan, and Sakhalin Island. It is an economically important ornamental plant with fertile and sterile flowers. Despite the recent increase in Hydrangea breeding and interest in germplasm conservation, relatively little is known about the relationships between Hydrangea species. Results We employed Illumina NovaSeq 6000 sequencing technology to generate a total of 39,945,480 reads, which were assembled into 137,715 contigs. A total of 109,092 filtered transcripts were used to identify microsatellites, and 54,587 microsatellite repeat motifs were revealed within 33,556 contigs. Among these, 4,510 transcripts harboring microsatellites had Gene Ontology annotations, and numerous microsatellite-containing transcripts exhibited associations with genes, including those encoding PPR proteins, aldehyde dehydrogenases, and bHLH transcription factors, related to the restorer of fertility (Rf) genes, which play a critical role in restoring fertility in plants with cytoplasmic male sterility. Validation of transcriptomic SSR markers demonstrated high levels of polymorphism, revealing significant genetic diversity within populations. However, null alleles and deviations from Hardy‒Weinberg equilibrium at specific loci suggested caution in genotyping accuracy. Population-level analysis disclosed high genetic differentiation and distinct clustering of populations. Conclusions The H. petiolaris transcriptomic SSR markers offer valuable insight for gaining insights into the population genetics, evolutionary background, and practical strategies for conserving this species. Moreover, the microsatellite loci we have identified and their associations with annotated genes hold promise for creating functional markers specifically tailored for H. petiolaris. These markers include valuable resources of transcriptomic SSR markers suitable for population genetic investigations and have a reasonable degree of applicability across different taxa.

The impact of market integration on the digital divide: An analysis based on the heterogeneous effect of innovation resource synergy

Resource market reforms have provided opportunities for reducing the digital divide (DD). In this study, we analyzed the theoretical mechanism of the impact of market integration (MI) on DD and the intermediary role of innovation resource (IR) synergy. Data from 271 cities in China were collected, and the DEA–Malmquist index and Thiel index were utilized to quantify DD among these cities during 2011–2019. The intermediary effect and SDM models were adopted for an empirical analysis. The results showed that (1) MI had a negative effect on DD in addition to significant spatial spillover effects. MI widened DD in the local city but narrowed the same in the adjacent cities. (2) IR synergy exerted positive intermediary effects, which were heterogeneous. Through human resource synergy, MI narrowed DD, through knowledge synergy, MI widened DD, and through the R&D capital synergy, MI did not significantly influence DD. (3) There was no significant spatial spillover effect of the intermediary role of IR synergy.

Investment in regeneration versus asexual reproduction is resource-dependent in a freshwater annelid

<ol> <li>The post-embryonic developmental processes of regeneration and asexual agametic reproduction are widespread and often co-occur in animals. These traits are of great ecological significance, but their physiological dynamics within species are not well understood. In naid annelids, regeneration and asexual reproduction via fission are evolutionarily related and mechanistically similar yet distinct, making these animals useful systems in which to study resource allocation strategies between the two processes.</li> <li>How asexual reproductive investment varies as a function of somatic investment demands was tested in the naid Pristina leidyi by repeatedly amputating the heads of individual worms, allowing regeneration to proceed, and measuring reproductive output over time. Treatments were replicated under high and low food levels to determine to what extent the investment dynamic between regeneration and fission is affected by the resource pool.</li> <li>Reproductive output was affected by injury and regeneration frequency in a resource-dependent manner, such that only worms with less food availability exhibited reproductive deficits; injury and regeneration did not affect reproductive output of worms under the high food condition. When reproductive output was decreased, this occurred not through a reduction in offspring quantity but a reduction in offspring quality. In the offspring of experimental animals, body size and fission speed were dependent on parental feeding level and to a lesser and inconsistent extent on parental injury history, but regeneration speed was unaffected by parental treatment.</li> <li>These findings suggest that in a species capable of both regeneration and asexual reproduction: 1) the resource pool is a key factor mediating the resource investment pattern between regeneration and fission; 2) sacrificing per-offspring investment rather than fecundity may be an optimal strategy if resources are limiting; 3) regeneration and fission have evolved distinct resource allocation pathways. This work prompts further questions about the physiological dynamics between regeneration and asexual reproduction in animals, such as whether and to what extent these have evolved adaptively, including in response to injury and resource pressures.</li> </ol>

Seed mix design and floral resources drive multi-trophic interactions in prairie restoration

<ol> <li>Ecological restoration often targets plant community recovery, but restoration success may depend on the recovery of a complex web of biotic interactions to maintain biodiversity and promote ecosystem services. Specifically, management that drives resource availability, such as seeding richness and provenance, may alter species interactions across multiple trophic levels. Using experimentally seeded prairies, we examine three key groups – plants, pollinators, and goldenrod crab spiders (Misumena vatia, predators of pollinators) – to understand the effects of species richness and admixture seed sourcing of restoration seed mixtures on multi-trophic interactions.</li> <li>Working with prairie plants, we experimentally manipulated seed mix richness and the number of seed source regions (single-source region or admixture seed sourcing). In each experimental prairie, we surveyed floral abundance and richness, pollinator visitation, and plant-M. vatia interactions.</li> <li>A high-richness seed mix increased floral abundance when seeds were sourced from a single geographic region, and floral abundance strongly increased pollinator visitation, M. vatia abundance, and prey capture. Seeding richness and admixture seed sourcing of the seed mixture did not affect floral species richness, but floral species richness increased pollinator visitation.</li> <li>Pollinators interacted with different floral communities across seeding treatments, indicating a shift in visited floral species with restoration practices.</li> <li> Synthesis and applications. Long-term success in prairie restoration requires the restoration of plant-arthropod interactions. We provide evidence that seed mix richness and admixture seed sourcing affect arthropod floral associations, but effective restoration of plant-arthropod interactions should consider total floral resource availability. Incorporating a food web perspective in restoration will strengthen approaches to whole ecosystem restoration.</li> </ol>

Data from: Inter- and intrapopulation resource use variation of marine subsidized western fence lizards

Marine resource subsidies can alter consumer dynamics of recipient populations in coastal systems. The response to these subsidies by generalist consumers is often not uniform, resulting in inter- and intrapopulation diet variation and niche diversification that may be intensified across heterogeneous landscapes. We sampled western fence lizards, Sceloporus occidentalis, from Puget Sound beaches and from coastal and inland forest habitats, as well as the lizards' marine and terrestrial prey items to quantify marine and terrestrial resource use with stable isotope analysis (SIA) and mixing models. Isotopic results reveal beach lizards had higher average δ13C and δ15N values compared to coastal and inland forest lizards, exhibiting a strong mixing line between marine and terrestrial prey items. Across five beach sites, lizard populations received 20 to 51% of their diet from marine resources, on average, with individual lizards ranging between 7% and 86% marine diet. The hillslope of the transition zone between marine and terrestrial environments at beach sites was positively associated with marine-based diets, as beach sites with the steepest slopes had the highest percent marine diets. Additionally, within-beach variation in transition zone slope was positively correlated with the isotopic niche space of beach lizard populations. Together, these results demonstrate that the physiography of transitional landscapes can mediate resource flow between environments, and variable habitat topography promotes niche diversification within a lizard population. Marine resource subsidization of Puget Sound beach S. occidentalis populations may facilitate occupation of the northwesternmost edge of the species range. Human impacts to the physiography of Puget Sound beaches, such as shoreline armoring, may influence the quantity of driftwood habitat available to support the unique ecology of beach-dwelling S. occidentalis. This highlights the importance of shoreline restoration, and conservation of intact beach habitat.