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48 results for “environmental stressors”
Supplementary material 2 from: Zizka VMA, Weiss M, Leese F (2020) Can metabarcoding resolve intraspecific genetic diversity changes to environmental stressors? A test case using river macrozoobenthos. Metabarcoding and Metagenomics 4: e51925. https://doi.org/10.3897/mbmg.4.51925
Figure S2. Four different datasets including shared OTUs between the different river systems (Emscher-Ennepe-Sieg, Emscher-Ennepe, Emscher-Sieg, Sieg-Ennepe). Number of OTUs is illustrated with taxonomic assignment on order level
Supplementary material 1 from: Zizka VMA, Weiss M, Leese F (2020) Can metabarcoding resolve intraspecific genetic diversity changes to environmental stressors? A test case using river macrozoobenthos. Metabarcoding and Metagenomics 4: e51925. https://doi.org/10.3897/mbmg.4.51925
Figure S1. Total number of aquatic macroinvertebrate individuals per sample and season plotted against the average haplotype number per OTU. Different colours indicate the three river systems
Data from: Multiple stressors in a top predator seabird: potential ecological consequences of environmental contaminants, population health and breeding conditions
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Supplementary material 8 from: Zizka VMA, Weiss M, Leese F (2020) Can metabarcoding resolve intraspecific genetic diversity changes to environmental stressors? A test case using river macrozoobenthos. Metabarcoding and Metagenomics 4: e51925. https://doi.org/10.3897/mbmg.4.51925
Table S1. Number of macroinvertebrate individuals per sample and season
Data from: Virus resistance is not costly in a marine alga evolving under multiple environmental stressors
Viruses are important evolutionary drivers of host ecology and evolution. The marine picoplankton Ostreococcus tauri has three known resistance types that arise in response to infection with the Phycodnavirus OtV5: susceptible cells (S) that lyse following viral entry and replication; resistant cells (R) that are refractory to viral entry; and resistant producers (RP) that do not all lyse but maintain some viruses within the population. To test for evolutionary costs of maintaining antiviral resistance, we examined whether O. tauri populations composed of each resistance type differed in their evolutionary responses to several environmental drivers (lower light, lower salt, lower phosphate and a changing environment) in the absence of viruses for approximately 200 generations. We did not detect a cost of resistance as measured by life-history traits (population growth rate, cell size and cell chlorophyll content) and competitive ability. Specifically, all R and RP populations remained resistant to OtV5 lysis for the entire 200-generation experiment, whereas lysis occurred in all S populations, suggesting that resistance is not costly to maintain even when direct selection for resistance was removed, or that there could be a genetic constraint preventing return to a susceptible resistance type. Following evolution, all S population densities dropped when inoculated with OtV5, but not to zero, indicating that lysis was incomplete, and that some cells may have gained a resistance mutation over the evolution experiment. These findings suggest that maintaining resistance in the absence of viruses was not costly.
Data from: Ranking stressor impacts on periphyton structure and function with mesocosm experiments and environmental-change forecasts
Streams are being subjected to physical, chemical, and biological stresses stemming from both natural and anthropogenic changes to the planet. In the face of limited time and resources, scientists, resource managers, and policy makers need ways to rank stressors and their impacts so that we can prioritize them from the most to least important (i.e., perform 'ecological triage'). We report results from an experiment in which we established a periphyton community from the Huron River (Michigan, USA) in 84 experimental 'flumes' (stream mesocosms). We then dosed the flumes with gradients of six common stressors (increased temperature, taxa extinctions, sedimentation, nitrogen, phosphorus, and road salt) and monitored periphyton structure and function. A set of a priori deterministic functions were fit to each stressor-endpoint response and model averaging based on AICc weights was used to develop concentration-response best-fit predictions. Model predictions from different stressors were then compared to forecasts of future environmental change to rank stressors according to the potential magnitude of impacts. All of the stressors studied altered at least one characteristic of the periphyton; however, the extent (i.e., structural and functional changes) and magnitude of effects expected under future forecasts differed significantly among stressors. Elevated nitrogen concentrations are projected to have the greatest combined effect on stream periphyton structure and function. Extinction, sediment, and phosphorus all had similar but less substantial impact on the periphyton (e.g., affected only structure not function, smaller magnitude change). Elevated temperature and salt both had measurable effects on periphyton, but their overall impacts were much lower than any of the other stressors. For periphyton in the Huron River, our results suggest that, among the stressors examined, increased N pollution may have the greatest potential to alter the structure and function of the periphyton community, and managers should prioritize reducing anthropogenic sources of nitrogen. Our study demonstrates an experimental approach to ecological triage that can be used as an additional line of evidence to prioritize management decisions for specific ecosystems in the face of ecological change.
Supplementary material 1 from: Zlateva I, Raykov V, Alexandrova A, Ivanova P, Chipev N, Stefanova K, Dzhembekova N, Doncheva V, Slabakova V, Stefanova E, Mihova S, Valcheva N, Hristova O, Dzhurova B, Dimitrov D, Georgieva A, Tsvetanova E, Andreeva M, Popov I, Yankova M, Raev Y, Petrov K (2023) Effects of anthropogenic and environmental stressors on the current status of red mullet (Mullus barbatus L., 1758) populations inhabiting the Bulgarian Black Sea waters. Nature Conservation 54: 55-79. https://doi.org/10.3897/natureconservation.54.103758
Supplementary data
How environmental stressors affect reproductive potential in a saltmarsh plant species Plantago maritima
We examined whether the presence or absence of different environmental stressors influenced the reproductive potential of a saltmarsh species – Plantago maritima. We focused on total seed output, seed quality and biomass of progeny. So far, there are no studies trying to answer the question of how different saltmarsh management affects the quality of seed in saltmarsh species. For the purposes of the study, plots subjected to light mowing, light or heavy grazing, trampling or rooting were designated in three nature reserves in Poland. On each plot, the abundance of infructescences per sq. metre was calculated. Mature infructascences were collected and their length and no of fruit capsules were measured. The seeds obtained from fruit capsules were weighted and sown in controlled conditions. The germination rate and the final germination percentage were calculated. A representative number of sprouts were grown. After a period of two months, the specimens were harvested and their total dry mass was measured. It was found that heavy grazing had the greatest effect on all of the studied characteristics. The presence of this factor resulted in shorter infructescences with a smaller number of fruit capsules. However, this phenomenon was compensated by the higher abundance of infructescences per sq. metre. At the same time seeds produced by grazed specimens were significantly lighter. Interestingly, intensive trampling by people affected Plantago maritima specimens in a similar way to heavy grazing, while mowing and rooting had less impact on the considered characteristics. Although a positive correlation between seed mass and germination success was found, the altogether lower seed mass had a negligible effect on germination parameters. Also, the differences in seed parameters did not affect dry mass of obtained progeny grown in lab conditions.
Effect of a Nurse-Led Environmental Stressor Reduction Package on Perceived Stress and Sleep Quality in Intensive Care Unit Patients
ClinicalTrials.gov study NCT07309406. IPD Sharing: YES. Countries: 1. Publications: 0.
How environmental stressors affect reproductive potential in a saltmarsh plant species Plantago maritima
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Data from: Evolutionary adaptation to environmental stressors: A common response at the proteomic level
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Data from: Ranking stressor impacts on periphyton structure and function with mesocosm experiments and environmental-change forecasts
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Data from: Virus resistance is not costly in a marine alga evolving under multiple environmental stressors
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Multiple Environmental Stressors Induce Complex Transcriptomic Responses Indicative of Phenotypic Outcomes in Western Fence Lizard [Exposure 3: TNT x malaria infection]
GEO Series GSE116025. Sceloporus occidentalis. 45 samples. Type: Expression profiling by array.
Environmental Stressors Impact Placentation Through Actions On Trophoblast, Immune, and Endothelial Cell Dynamics
GEO Series GSE178407. Rattus norvegicus. 4 samples. Type: Expression profiling by high throughput sequencing.
Multiple Environmental Stressors Induce Complex Transcriptomic Responses Indicative of Phenotypic Outcomes in Western Fence Lizard [Exposure 1: TNT x food limitation]
GEO Series GSE116021. Sceloporus occidentalis. 42 samples. Type: Expression profiling by array.
Transgenerational self-reconstruction of disrupted chromatin organization after exposure to an environmental stressor in mice
GEO Series GSE136377. Mus musculus. 96 samples. Type: Expression profiling by high throughput sequencing; Methylation profiling by high throughput sequencing.
Multiple environmental stressors induce an adaptive maternal effect
<p>Evolution of adaptation requires predictability and recurrence of functional contexts. Yet, organisms live in multi-faceted environments that are dynamic and ever-changing, making it difficult to understand how complex adaptations evolve. This problem is particularly apparent in the evolution of adaptive maternal effects, which are often assumed to require reliable and discrete cues that predict conditions in the offspring environment. One resolution to this problem is if adaptive maternal effects evolve through pre-existing, generalized maternal pathways that respond to many cues and also influence offspring development. Here, we assess whether an adaptive maternal effect in western bluebirds is influenced by maternal stress pathways across multiple challenging environments. Combining seventeen years of hormone sampling across diverse environmental contexts with an experimental manipulation of the competitive environment, we show that multiple environmental factors influenced maternal corticosterone levels which, in turn, influenced the maternal effect on aggression of sons in adulthood. Together, these results support the idea that multiple stressors can induce a known maternal effect in this system. More generally, it suggests that activation of general pathways, such as the HPA axis, may simplify and facilitate the evolution of adaptive maternal effects by integrating variable environmental conditions into pre-existing maternal physiological systems.</p>
The Effect of Education on Environmental Stressors Perceived by Patients
ClinicalTrials.gov study NCT06174974. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Multiple Environmental Stressors Induce Complex Transcriptomic Responses Indicative of Phenotypic Outcomes in Western Fence Lizard [Exposure 2: food limitation x malaria infection]
GEO Series GSE116024. Sceloporus occidentalis. 33 samples. Type: Expression profiling by array.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.