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134 results for “Ecosystem structure”
FIGURE 3 in Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil
FIGURE 3 | Median-joining network of Prochilodus lineatus, based on haplotypes of D-loop marker. Sizes of the circled are proportional to the frequencies of the haplotypes at issue. The colors indicate the groups according to the collections: red circles: Sep_03; yellow circles: Jan_05; purple circles: Aug_05; blue circles: Jan_06; pink circles: Jan_09; green circles: Sep_10; pastel pink circles: Feb_15. Hatch marks represent the number of mutations by which haplotypes differ.
FIGURE 1 in Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil
FIGURE 1 | Map of the State of Sao Paulo showing the main components of the hydrographic system in the Southeast of Brazil. In detail square, the collection site of samples located in Cachoeira de Emas, Pirassununga-SP. The Mogi-Guaçu River is a component of the Upper Paraná River basin.
FIGURE 2 in Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil
FIGURE 2 | Graph of the Bayesian analysis of population structure of microsatellites for Prochilodus lineatus. A. Delta(k) showing the highest value in a population structure of K = 3; B. The estimated mean log-likelihoods [ln(PrK)]; C. Structure bar plot. Black lines separate the different sampled populations based on temporal collection.
Structural diversity as a reliable and novel predictor for ecosystem productivity
<p>Data and code for LaRue et al. (2023) Structural diversity as a reliable and novel predictor for ecosystem productivity.<br> Frontiers in Ecology and the Environment: Accepted.</p>
Data for: Richness, food webs structures and ecosystem functioning
<p>This dataset has information on the spatial distribution of fish species from the middle Paraná River and the diet information of 15 fish-eating species. The objective of the paper was to evaluate the relationship between richness, the structure of food webs and standing biomass. In addition to the information on diet and spatial distribution, there is a readme file, two Rstudio scripts and an R environment (all the results of the work can be found in the latter).</p>
Data for: Richness, food webs structures and ecosystem functioning
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Consumer movement dynamics as hidden drivers of stream habitat structure: suckers as ecosystem engineers on the night shift
Ecosystem engineers engineering can control the spatial and temporal distribution of resources and movement by engineering organisms within an ecosystem can transport mobilize resources across boundaries and distribute engineering effects. Movement patterns of fishes can cause physical changes to stream aquatic habitats though nesting or feeding, both of which often vary in space and time. Here we present evidence of ecosystem engineering by the Sonora sucker (Catostomus insignis), a dominant fish in streams of the southwestern United States, and show how cryptic nocturnal movement patterns and bioturbation activities control heterogeneity in benthic substrates, and in sediment and carbon export. Sonora suckers exhibit distinct diel movement patterns, spending daylight hours in refuge habitats (typically deep pools) while moving into shallow habitats at night to feed. Feeding by suckers creates substantial disturbance in soft sediments that are patchy in space and time. These disturbances moved up to 2.4 × 104 cm3 of sediment per square meter per week in locations that are up to hundreds of meters away from sucker daytime refuges. The diel cycles in feeding activity (i.e., nocturnal digging in benthic substrates) caused nighttime pulses in suspended sediment that comprised up to 32% of the daily suspended load and organic matter transport of a stream reach. During the daytime, this particulate transport settles in habitats beyond the location of the initial disturbance, thus redistributing both sediment and organic matter. Our data indicate that cryptic movement by ecosystem engineers can distribute their effects in space and time generating heterogeneity in resources and suggest that habitat modifications restricting consumer movement may alter the impact of engineering activities.
Figure 2. Species area curve obtained from 264 in Composition and structure of plant communities in the Moist Temperate Forest Ecosystem of the Hindukush Mountains, Pakistan
Figure 2. Species area curve obtained from 264 plant species in Lalkoo valley.
Figure 3. Cluster Dendrogram indicating 11 in Composition and structure of plant communities in the Moist Temperate Forest Ecosystem of the Hindukush Mountains, Pakistan
Figure 3. Cluster Dendrogram indicating 11 plant association types in the Lalkoo Valley.
Figure 1 in Composition and structure of plant communities in the Moist Temperate Forest Ecosystem of the Hindukush Mountains, Pakistan
Figure 1. Samping sites in Lalkoo valley.
Figure 3 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 3. Species accumulation curves at the three savanna ecosystems of Colombian Llanos. Dotted lines show 95% confidence interval.
Figure 2 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 2. Some species recorded in Savanna ecosystems in the Colombian Llanos: (A) Hydrochoerus hydrochaeris; (B) Myrmecophaga tridactyla; (C) Puma yagouaroundi; (D) Cuniculus paca; (E) Puma concolor; (F) Odocoileus cariacou; (G) Leopardus pardalis; (H) Tamandua tetradactyla; (I) Pecari tajacu.
Figure 1 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 1. Geographical location of the localities studied in the three savanna ecosystems sampled in the Colombian Llanos: (A) SE-1., floodplain savannas (Arauca); (B) SE-2., aeolian savannas (Casanare); (C) SE-3., high-plain savannas (Vichada).
Figure 6 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 6. Frequency of tropic guilds recorded at the three savanna ecosystems of the Colombian Llanos.
Figure 5 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 5. Comparisons of mean species richness and total number of events of medium- and large-sized mammals among the three savanna ecosystems of the Colombian Llanos. Boxplots with different letters denotes significant differences among means (p <0.05).
Figure 4 in Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Figure 4. Rank-abundance curves of medium- and large-sized mammals recorded at the three savanna ecosystems of the Colombian Llanos. Species acronyms are listed in Table 1.
Differential effects of ecosystem engineering by the superb lyrebird Menura novaehollandiae and herbivory by large mammals on floristic regeneration and structure in wet eucalypt forests
<p>Ecosystem engineers that modify soil and ground-layer properties exert a strong influence on vegetation communities in ecosystems worldwide. Understanding the interactions between animal engineers and vegetation is challenging when in the presence of large herbivores, as many vegetation communities are simultaneously affected by both engineering and herbivory. The superb lyrebird <em>Menura novaehollandiae</em>, an ecosystem engineer in wet forests of south-eastern Australia, extensively modifies litter and soil on the forest floor. The aim of this study was to disentangle the impacts of engineering by lyrebirds and herbivory by large mammals on the composition and structure of ground-layer vegetation. We carried out a two-year, manipulative exclusion experiment in the Central Highlands of Victoria, Australia. We compared three treatments: fenced plots with simulated lyrebird foraging; fenced plots excluding herbivores and lyrebirds; and open controls. This design allowed assessment of the relative impacts of engineering and herbivory on germination rates, seedling density, vegetation cover and structure, and community composition. Engineering by lyrebirds enhanced the germination of seeds in the litter layer. After two years, more than double the number of germinants were present in 'engineered' than 'non-engineered' plots. Engineering did not affect the density of seedlings, but herbivory had strong detrimental effects. Herbivory also reduced the floristic richness and structural complexity (< 0.5 m) of forest vegetation, including the cover of herbs. Neither process altered the floristic composition of the vegetation within the 2-year study period. Ecosystem engineering by lyrebirds and herbivory by large mammals both influence the structure of forest-floor vegetation. The two-fold increase in seeds stimulated to germinate by engineering may contribute to the evolutionary adaptation of plants by allowing greater phenotypic expression and selection than would otherwise occur. Over long timescales, engineering and herbivory likely combine to maintain a more-open forest floor conducive to ongoing ecosystem engineering by lyrebirds.</p>
Data from: Ocean deoxygenation caused non-linear responses in the structure and functioning of benthic ecosystems
<p><span>The O<sub>2 </sub>content of the global ocean has been declining progressively over the past decades, mainly because of human activities and global warming. Nevertheless, how long-term deoxygenation affects macrobenthic communities, sediment biogeochemistry and their mutual feedback remains poorly understood. Here, we evaluate the response of the benthic assemblages and biogeochemical functioning to decreasing O<sub>2 </sub>concentrations along the persistent bottom-water dissolved O<sub>2</sub> gradient of the Estuary and Gulf of St. Lawrence (QC, Canada). We report several of non-linear biodiversity and functional responses to decreasing O<sub>2</sub> concentrations, and identify an O<sub>2</sub> threshold that occurs at approximately at 63 µM. Below this threshold, macrobenthic community assemblages change, and bioturbation rates drastically decrease to near zero. Consequently, the sequence of electron acceptors used to metabolize the sedimentary organic matter is squeezed towards the sediment surface while reduced compounds accumulate closer (as much as 0.5 to 2.5 cm depending on the compound) to the sediment-water interface. Our results illustrate the capacity of bioturbating species to compensate for the biogeochemical consequences of hypoxia and can help to predict future changes in benthic ecosystems.</span></p>
Data from: A dominant plant species and insects interactively shape plant community structure and an ecosystem function
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Data from: Ocean deoxygenation caused non-linear responses in the structure and functioning of benthic ecosystems
Open the record for dataset details and reuse information.
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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)
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DANDI Archive for NWB datasets
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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.