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82 results for “functional community composition”
Data from: Intraspecific variation in host plant traits mediates taxonomic and functional composition of local insect herbivore communities
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Data from: Ant community composition and functional traits in newly established grasslands within agricultural landscapes
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Data from: Warming-induced functional shifts in the decomposer community interact with plant community compositional shifts to impact litter decomposition
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Fig. 3 in Composition, density and biomass of fish community from the surf zone as a function of the lunar cycle at Miramar Beach in Cabedelo, Paraíba
Fig. 3. Redundancy analysis (RDA) for the density (ind. ha-1) of the most representative species in Miramar Beach, Cabedelo. (TEMP= temperature; SAL= salinity; TURB= surbidity; COND= conductivity e PH= hidrogen potential. (Atr = Anchoa tricolor; Acl = Anchovia clupeoides; Cla = Caranx latus; Csp = Cathorops spixii; Cno = Conodon nobilis; Pco = Haemulopsis corvinaeformis; Pvi = Polydactylus virginicus; Larbre = Larimus breviceps; Svo = Selene vomer; Sbr = Stellifer brasiliensis; Tfa = Trachinotus falcatus; Tgo = Trachinotus goodei). Lunar phase and sampling areas (CRA1 - crescent/ area 1; CRA2 -crescent/ area 2; NA1 -New/ area 1; NA2 -New / area 2; CHA1 - Full/ area 1; CHA2 -Full/ area 2; MA1 -Waning/ area 1; MA2 -Waning/ area 2).
Fig. 2 in Composition, density and biomass of fish community from the surf zone as a function of the lunar cycle at Miramar Beach in Cabedelo, Paraíba
Fig. 2. Mean + Standard Error (SE) of number of species, total density (ind.ha-1) and biomass (g.ha-1) of fishes as a function of the lunar phases from left to right in the horizontal axes (crescent, full, weaning and new moon).
Fig. 1 in Composition, density and biomass of fish community from the surf zone as a function of the lunar cycle at Miramar Beach in Cabedelo, Paraíba
Fig. 1. Miramar beach in Cabedelo, Paraíba, northeast of Brazil. Two areas were highlighted (named as A1 and A2), located close to Paraíba River mouth (Source: Google Earth, accessed on 08 June 2016).
Data from: Cyanobacteria drive community composition and functionality in rock-soil interface communities
Most ecological research on hypoliths, significant primary producers in hyperarid deserts, has focused on the diversity of individual groups of microbes (i.e. bacteria). However, microbial communities are inherently complex, and the interactions between cyanobacteria, heterotrophic bacteria, protista and metazoa, are likely to be very important for ecosystem functioning. Cyanobacterial and heterotrophic bacterial communities were analysed by pyrosequencing, while metazoan and protistan communities were assessed by T-RFLP analysis. Microbial functionality was estimated using carbon substrate utilization. Cyanobacterial community composition was significant in shaping community structure and function in hypoliths. Ecological network analysis showed that most significant co-occurrences were positive, representing potential synergistic interactions. There were several highly interconnected associations (modules) and specific cyanobacteria were important in driving the modular structure of hypolithic networks. Together, our results suggest that hypolithic cyanobacteria have strong effects on higher trophic levels and ecosystem functioning.
Data from: Abrupt changes in the composition and function of fungal communities along an environmental gradient in the High Arctic
Fungi play a key role in soil-plant interactions, nutrient cycling, and carbon flow and are essential for the functioning of arctic terrestrial ecosystems. Some studies have shown that the composition of fungal communities is highly sensitive to variations in environmental conditions, but little is known about how the conditions control the role of fungal communities (i.e. their ecosystem function). We used DNA metabarcoding to compare taxonomic and functional composition of fungal communities along a gradient of environmental severity in Northeast Greenland. We analysed soil samples from fell fields, heaths, and snowbeds, three habitats with very contrasting abiotic conditions. We also assessed within-habitat differences by comparing three widespread microhabitats (patches with high cover of Dryas, Salix, or bare soil). The data suggest that, along the sampled mesotopographic gradient, the greatest differences in both fungal richness and community composition are observed among habitats, while the effect of microhabitat is weaker, although still significant. Furthermore, we found that richness and community composition of fungi are shaped primarily by abiotic factors and to a lesser, though still significant extent, by floristic composition. Along this mesotopographic gradient, environmental severity is strongly correlated with richness in all fungal functional groups: positively in saprotrophic, pathogenic, and lichenised fungi, and negatively in ectomycorrhizal and root-endophytic fungi. Our results suggest complex interactions amongst functional groups, possibly due to nutrient limitation or competitive exclusion, with potential implications on soil carbon stocks. These findings are important in light of the environmental changes predicted for the Arctic.
Data from: Nitrogen enrichment and warming shift community functional composition via distinct mechanisms: the role of intraspecific trait variability and species turnover
<p>1. Global change factors may shift community functional composition by driving species turnover (species occurrence and species relative abundance) and intraspecific trait variability. However, their relative contribution in determining the functional response of community to global change, especially nitrogen enrichment and warming, remains unclear.</p> <p>2. We conducted a fully factorial field experiment in a Tibetan alpine meadow to examine responses of plant community functional composition to nitrogen enrichment and warming by quantifying seven plant functional traits in each plot. Using the sum of squares decomposition, we further disentangled the relative contribution of intraspecific trait variability and species turnover to changes in community functional composition.</p> <p>3. We found that nitrogen enrichment caused a shift of plant community toward a more resource-acquisitive strategy, while warming resulted in a shift toward a more resource-conservative strategy. Plant intraspecific trait variability controls shifts in community functional composition in response to nitrogen enrichment, whereas species turnover (especially change in species relative abundance) mainly explains warming-induced shifts. Nitrogen enrichment and warming did not show significant interactive effects on plant functional composition.</p> <p>4. These findings suggest that nitrogen enrichment and warming can alter community functional composition of alpine meadow through distinct mechanisms. Plant intraspecific trait variability confers functional resilience of Tibetan alpine meadows under nitrogen enrichment, but warming could induce significant turnover of species that pronouncedly impacts community functioning in this highland ecosystem.</p>
Data from: Community functional trait composition at the continental scale: the effects of non-ecological processes
Ecological communities and their response to environmental gradients are increasingly being described by measures of trait composition at the community level – the trait-based approach. Whether ecological or non-ecological processes influence trait composition between communities has been debated. Understanding the processes that influence trait composition is important for reconstructing paleoenvironmental conditions from fossil deposits and for understanding changes in community functionality through time. Here, we assess the influence of ecological and non-ecological processes on the distribution of traits within North American mammals. We found that non-ecological processes including historical contingency, spatial autocorrelation, and evolutionary history do not influence trait composition; however, the variance in trait composition is highly explained by climate gradients. Our results suggest that habitat breadth, terrestriality, diet breadth, and reproductive traits are strong candidates as proxies for measuring functional aspects of environments in the past and present.
Intraspecific trait variation and species turnover mediate grazing impacts on above- and below-ground functional trait composition of plant communities
<ol> <li>Although grazing has significant impacts on plant functional traits and community composition in grasslands, few studies have simultaneously explored how plant above- and below-ground traits and community functional composition respond to grazing.</li> <li>Using a grazing manipulation experiment with seven levels of grazing intensity (0, 1.5, 3.0, 4.5, 6.0, 7.5, and 9 sheep ha<sup>-1</sup>) in the Inner Mongolia grassland, we partitioned the roles of intraspecific trait variation (ITV) and species turnover underlying the grazing induced changes in above- and below-ground functional trait composition of plant communities. Six aboveground traits (i.e. plant height, plant aboveground biomass, plant density, leaf area, specific leaf area (SLA) and leaf density) and three root traits (average root diameter, ARD; specific root length, SRL; and root tissue density, RTD) of the first-, second- and third-order roots (1<sup>st</sup>-, 2<sup>nd</sup>-, and 3<sup>rd</sup>-) were measured at the plant individual level. </li> <li>At the community level, plant above-ground traits shifted towards grazing avoidance strategy (e.g. plant height and leaf area decreased), and below-ground traits shifted towards conservative strategy (i.e. 1<sup>st</sup>-SRL and 2<sup>nd</sup>-SRL decreased, 1<sup>st</sup>-RTD and 2<sup>nd</sup>-ARD increased) with increasing grazing intensity. Functional tradeoffs were found between plant individual biomass and plant density, and between leaf area and leaf density under grazing. However, community-weighted mean SRL (SRL<sub>CWM</sub>) and ARD (ARD<sub>CWM</sub>) of different root orders exhibited functional coordination under grazing pressure. SLA<sub>CWM</sub> and SRL<sub>CWM</sub> also showed synergistic responses to grazing.</li> <li> The ITV plays a predominant for the changes in above- and below-ground functional trait composition at the community level. However, changes in mean trait values among plant species with different resource use strategies were mainly triggered by species turnover. For species with different resource use strategies, grazing exhibited a coordinated effects on ITV but an offset effect on species turnover.</li> <li> <i>Synthesis.</i> Our results demonstrate that both the above- and below-ground trait composition of plant communities shifted toward conservative strategy under long-term grazing. This study highlights the effects of ITV and species turnover that govern the grazing-induced changes in functional trait composition of plant communities, and has important implications for grazing management in semiarid grasslands.</li> </ol>
Data from: Rapid divergence of predator functional traits affects prey composition in aquatic communities
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Intraspecific trait variation and species turnover mediate grazing impacts on above- and below-ground functional trait composition of plant communities
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Data from: Community functional trait composition at the continental scale: the effects of non-ecological processes
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Data from: Abrupt changes in the composition and function of fungal communities along an environmental gradient in the High Arctic
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Data from: Cyanobacteria drive community composition and functionality in rock-soil interface communities
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Data from: Nitrogen enrichment and warming shift community functional composition via distinct mechanisms: the role of intraspecific trait variability and species turnover
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Influence of SRP With MM on the Composition and Functional Characteristics of Subgingival Microbiome Communities
ClinicalTrials.gov study NCT05422742. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Tree functional diversity affects litter decomposition and arthropod community composition in a tropical forest
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Ammonia oxidizing archaeal community composition in Gulf of Mexico sediments investigated with an amoA functional gene microarray
GEO Series GSE42286. synthetic construct; uncultured ammonia-oxidizing archaeon. 15 samples. Type: Other.
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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.