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48 results for “artificial communities”
Fig. 2 in Phenology And Population Structure Of Forest Herbaceous Species In Artificial And Natural Communities In The Steppe Zone Of Ukraine
Fig. 2. The age structure of populations in artificial plant community: a - association Anemonoides ranunculoides (1) + Corydalis solida (2) + Corydalis marschalliana, b - association Ficaria verna (3) + Anemonoides ranunculoides (4) + Anemonoides nemorosa, (5) + Corydalis solida (6).
Figure 4 in Phototrophic communities of Ahshtyrskaya Cave in the condition of artificial light
Figure 4. Scatter plots of 18 sites based on: a) total species composition, b) higher plants species composition, c) algae and cyanobacteria species composition; d) cluster analysis for 18 sites based on total species composition of communities in different cave zones.
Figure 3 in Phototrophic communities of Ahshtyrskaya Cave in the condition of artificial light
Figure 3. Scheme of Akhshtyrskaya Cave with the location of the lamps, scheme is given by Isaev & Starikh (2002).
Artificial Communities Seedling Growth: Bonanza Creek Experimental Forest (planted in 1989; measured in 1992, 1995, and 2002).
This study considers the relative role of competition and facilitation in primary succession of the boreal forest floodplain of Bonanza Creek Experimental Forest. Alder (Alnus tenuifolia Nutt.) is an early colonist of young floodplain sites, where it contributes greatly to soil development through the addition of nitrogen to the soil. White spruce (Picea glauca (Moench.) Voss) typically colonizes such sites later; it becomes established beneath a canopy of alder and willow (Salix spp.) which is sometimes overtopped by young balsam poplar (Populus balsamifera L.). The alder may potentially influence white spruce both positively and negatively. Possible facilitative effects include protection of small seedlings from excess heat or heavy siltation accompanying flooding and addition of soil nitrogen, an effect that may extend for many years. Competition for light (and other resources) before the white spruce has overtopped the alder canopy may prove to be a major negative effects. This study seeks to determine the net balance of these effects on the floodplain successional sequence by planting spruce seedlings with and without the presence of alder. Plots of white spruce seedlings were planted in 1989 on an early successional silt bar with and without alder in the Bonanza Creek Experimental Forest. Biomass by species and carbon and nitrogen pools of plants and soils were measured in 2002. Height and survivorship of spruce seedlings were measured in 1992, 1995, and 2002. White spruce grew more rapidly in the presence of alder during the first six years. After 13 years, however, seedlings planted with alder experienced high mortality due to intensive browsing by snowshoe hares. Alder resulted in greater total biomass and larger carbon and nitrogen pools in plants and soils.
Fig. 8 in Phenology And Population Structure Of Forest Herbaceous Species In Artificial And Natural Communities In The Steppe Zone Of Ukraine
Fig. 8. Dates of onset and duration of budding (1) and flowering (2).
Figure 1 in Phototrophic communities of Ahshtyrskaya Cave in the condition of artificial light
Figure 1. Lampenflora.
Figure 2 in Phototrophic communities of Ahshtyrskaya Cave in the condition of artificial light
Figure 2. One of the illuminated distant halls.
Artificial light at night (ALAN) decreases plant diversity and performance in experimental grassland communities – Data on species biomass and traits
<p>Artificial light at night (ALAN) affects many areas of the world and is increasing globally. To date, there has been limited and inconsistent evidence regarding the consequences of ALAN on plant communities as well as the fitness of their constituent species. ALAN could be beneficial for plants as they need light as an energy source, but they also need darkness for regeneration and growth. We created model communities composed of 16 plant species sown, exposed to a gradient of ALAN ranging from 'moonlight only' to conditions like situations typically found directly underneath a streetlamp. We measured plant community composition and its production (biomass), as well as functional traits of three plant species from different functional groups (grasses, herbs, legumes) in two separate harvests. We found that biomass was reduced by 33% in the highest ALAN treatment compared to the control, Shannon diversity decreased by 43% and Evenness by 34% in the first harvest. Some species failed to establish in the second harvest. Specific leaf area, leaf dry matter content and leaf hairiness responded to ALAN. These responses suggest that plant communities will be sensitive to increasing ALAN, and they flag a need for plant conservation activities that consider impending ALAN scenarios.</p>
Impact of artificial reef deployment on reef fish movement and community assemblages
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Artificial light at night (ALAN) decreases plant diversity and performance in experimental grassland communities – Data on species biomass and traits
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Artificial Communities Experiment: Net Nitrogen Mineralization and Nitrification Potentials
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Data from: Experiments with artificial nests provide evidence for ant community stratification and nest site limitation in a tropical forest
Ants are dominant in tropical forests and many species nest in hollow cavities. The manner in which species are vertically stratified in these complex habitats is not known, with lack of nest sites being proposed to limit ant populations. Here we assess ant community stratification and nest site limitation in a lowland rainforest in New Guinea using experimental addition of artificial bamboo nests of two cavity sizes (small: ~12 mm. large: ~32 mm diameter) placed at ground level, in the understorey, and in the canopy. We also conducted a pilot experiment to test the utility of nest translocation. Nests were checked for occupancy after 10 weeks and half of the occupied nests were then translocated between forest plots, while keeping same vertical position. Occupancy of small nests was much higher in the understorey and canopy than at ground level (~75% versus ~25%). Translocation was successful, as a majority of nests was inhabited by the same species before and after translocation and there was no impact of translocation to a different plot compared to the control, except for a reduction in colony size at ground level. Our experiment demonstrates a vertical stratification in community composition of ants nesting in hollow dead cavities and shows that these ants are more nest-site limited in the higher strata than at ground level. Use of small artificial cavities has great potential for future experimental studies, especially for those focused on arboreal ants, as occupancy is high and translocation does not negatively affect their colony size.
Data from: Forest management intensity affects aquatic communities in artificial tree holes
Forest management could potentially affect organisms in all forest habitats. However, aquatic communities in water-filled tree-holes may be especially sensitive because of small population sizes, the risk of drought and potential dispersal limitation. We set up artificial tree holes in forest stands subject to different management intensities in two regions in Germany and assessed the influence of local environmental properties (tree-hole opening type, tree diameter, water volume and water temperature) as well as regional drivers (forest management intensity, tree-hole density) on tree-hole insect communities (not considering other organisms such as nematodes or rotifers), detritus content, oxygen and nutrient concentrations. In addition, we compared data from artificial tree holes with data from natural tree holes in the same area to evaluate the methodological approach of using tree-hole analogues. We found that forest management had strong effects on communities in artificial tree holes in both regions and across the season. Abundance and species richness declined, community composition shifted and detritus content declined with increasing forest management intensity. Environmental variables, such as tree-hole density and tree diameter partly explained these changes. However, dispersal limitation, indicated by effects of tree-hole density, generally showed rather weak impacts on communities. Artificial tree holes had higher water temperatures (on average 2°C higher) and oxygen concentrations (on average 25% higher) than natural tree holes. The abundance of organisms was higher but species richness was lower in artificial tree holes. Community composition differed between artificial and natural tree holes. Negative management effects were detectable in both tree-hole systems, despite their abiotic and biotic differences. Our results indicate that forest management has substantial and pervasive effects on tree-hole communities and may alter their structure and functioning. We furthermore conclude that artificial tree-hole analogues represent a useful experimental alternative to test effects of changes in forest management on natural communities.
Data from: Artificial light increases nighttime prevalence of predatory fishes, altering community composition on coral reefs
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Evaluation of Effectiveness for Connected Network for EMS Comprehensive Technical-support Using Artificial Intelligence (CONNECT-AI) System by Community Intervention
ClinicalTrials.gov study NCT04829279. IPD Sharing: NO. Countries: 1. Publications: 1.
The Evaluation of Artificial Intelligence in Lifestyle Management of Diabetic Patients in Community
ClinicalTrials.gov study NCT06118671. IPD Sharing: NO. Countries: 1. Publications: 9.
Data from: Experiments with artificial nests provide evidence for ant community stratification and nest site limitation in a tropical forest
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Data from: Forest management intensity affects aquatic communities in artificial tree holes
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Data from: Illuminating the physiological implications of artificial light on an insectivorous bat community
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Artificially selecting bacterial communities using propagule strategies
Artificial selection is a promising approach to manipulate microbial communities. Here, we report the outcome of two artificial selection experiments at the microbial community level. Both used "propagule" selection strategies, whereby the best-performing communities are used as the inocula to form a new generation of communities. Both experiments were contrasted to a random selection control. The first experiment used a defined set of strains as the starting inoculum, and the function under selection was the amylolytic activity of the consortia. The second experiment used multiple soil communities as the starting inocula, and the function under selection was the communities' cross-feeding potential. In both experiments, the selected communities reached a higher mean function than the control. In the first experiment this was caused by a decline in function of the control, rather than an improvement of the selected line. In the second experiment, this response was fueled by the large initial variance in function across communities, and stopped when the top-performing community "fixed" in the metacommunity. Our results are in agreement with basic expectations from breeding theory, pointing to some of the limitations of community-level selection experiments which can inform the design of future studies.
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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.