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21 results for “disturbance and invasion”
Disturbance-mediated invasions are dependent on community resource abundance
<p>Here is the data for the manuscript entitled "<em>Disturbance mediated invasions are dependent on community resource abundance</em>."</p> <p>The dataset columns are:</p> <ul> <li><strong>disturb</strong> - dusturbance frequency (1 = everyday, 2 = every two days etc)</li> <li><strong>kb</strong> - resource abundance. 0.01 = low, 0.1 medium and 1.0 high.</li> <li><strong>invader</strong> - nill = no invader added (not used in the manuscript), sm shows microcosms invaded by the Smooth invader and ws by the Wrinkly Spreader invader</li> <li><strong>smooth</strong> - the final number of resident smooths</li> <li><strong>wrinkly</strong> - the final number of resident wrinkly spreaders</li> <li><strong>fuzzy</strong> - the final number of resident fuzzy</li> <li><strong>iden</strong> - the final number of invader cfu</li> <li><strong>cfu/6ml</strong> - the number of resident cfu on day four</li> </ul> <p> </p> <p>Smooth, wrinkly, fuzzy and iden columns are cfu counts per 25uL</p>
Data from: Habitat use and seed removal by invasive rats (Rattus rattus) in disturbed and undisturbed rainforest, Puerto Rico
Despite frequent occurrences of invasive rats (Rattus spp.) on islands, their known effects on forests are limited. Where invasive rats have been studied, they generally have significant negative impacts on native plants, birds, and other animals. This study aimed to determine invasive rat distribution and effects on native plant populations via short-term seed removal trials in tropical rain forest habitats in the Luquillo Experimental Forest, Puerto Rico. To address the first objective, we used tracking tunnels (inked and baited cards inside tunnels enabling animal visitors' foot prints to be identified) placed on the ground and in the lower canopy within disturbed (treefall gaps, hurricane plots, stream edges) and undisturbed (continuous forest) habitats. We found that rats are present in all habitats tested. Secondly, we compared seed removal of four native tree species (Guarea guidonia, Buchenavia capitata, Tetragastris balsamifera, and Prestoea acuminata) between vertebrate-excluded and free-access treatments in the same disturbed and undisturbed habitats. Trail cameras were used to identify animals responsible for seed contact and removal. Black rats (R. rattus) were responsible for 65.1% of the interactions with seeds, of which 28.6% were confirmed seed removals. Two plant species had significantly more seeds removed in disturbed (gaps) than undisturbed forest. Prestoea acuminata had the lowest seed removal (9% in 10 d), whereas all other species had >30% removal. Black rats are likely influencing fates of seeds on the forest floor, and possibly forest community composition, through dispersal or predation. Further understanding of rat-plant interactions may be useful for formulating conservation strategies.
Data from: Testing genotypic variation of an invasive plant species in response to soil disturbance and herbivory
Herbivores, competitors, and predators can inhibit biological invasions ("biotic resistance" sensu Elton 1959), while disturbance typically promotes biological invasions. Although biotic resistance and disturbance are often considered separately in the invasion literature, these two forces may be linked. One mechanism by which disturbance may facilitate biological invasions is by decreasing the effectiveness of biotic resistance. The effects of both disturbance and biotic resistance may vary across invading genotypes, and genetic variation in the invasive propagule pool may increase the likelihood that some genotypes can overcome biotic resistance or take greater advantage of disturbance. We conducted an experimental field trial in which we manipulated soil disturbance (thatch removal and loosening soil) and the presence of insect herbivores and examined their effects on the invasion success of 44 Medicago polymorpha genotypes. As expected, insecticide reduced leaf damage and increased Medicago fecundity, suggesting that insect herbivores in this system provide some biotic resistance. Soil disturbance increased Medicago fecundity, but did not alter the effectiveness of biotic resistance by insect herbivores. We found significant genetic variation in Medicago in response to disturbance, but not in response to insect herbivores. These results suggest that the ability of Medicago to invade particular habitats depends on the amount of insect herbivory, the history of disturbance in the habitat, and how the specific genotypes in the invader pool respond to these factors.
Disentangling the mechanisms underpinning disturbance-mediated invasion data
<p><span>Disturbances can play a major role in biological invasions: by destroying biomass, they alter habitat and resource abundances. Previous field studies suggest that disturbance-mediated invader success is a consequence of resource influxes, but the importance of other potential covarying causes, notably the opening up of habitats, have yet to be directly tested. Using experimental populations of the bacterium <i>Pseudomonas fluorescens </i>we determined the relative importance of disturbance-mediated habitat opening and resource influxes, plus any interaction between them, for invader success of two ecologically distinct morphotypes. Resource addition increased invasibility, while habitat opening had little impact or interacted with resource addition. Both invaders behaved similarly, despite occupying different ecological niches in the microcosms. Treatment also affected the composition of the resident population, which further affected invader success. Our results provide experimental support for the observation that resource input is a key mechanism through which disturbance increases invasibility. </span></p>
Abiotic and biotic contexts shape the effect of disturbance on non-native plant invasion
<p>Making predictions about when and where a given mechanism of invasion will be weak or strong is crucial for the effective management of non-native species. Despite the importance of disturbance on invasion, our understanding of how variation in abiotic and/or biotic conditions may modify the disturbance-invasion relationship is scarce. Here, we aimed to evaluate how abiotic (soil type) and biotic (tree and shrub cover) contexts affect the disturbance-invasion relationship in disturbed and nearby non-disturbed communities in the semi-arid open forest of central Argentina (ca. 36° S) using field sampling. We found that abiotic context modulated non-native species success in disturbed communities, whereas both abiotic and biotic context modulated success in nearby non-disturbed communities. These findings suggest that the plant invasion-disturbance relationship is context-dependent. Our results hint at the possibility that the significance of disturbance in predicting invasion might diminish as the importance of abiotic filters increases.</p>
Soil disturbance and invasion magnify CO2 effects on grassland productivity, reducing diversity
<p>Climate change, disturbance, and plant invasion threaten grassland ecosystems, but their combined and interactive effects are poorly understood. Here, we examine how the combination of disturbance and plant invasion influences the sensitivity of mixedgrass prairie to elevated carbon dioxide (eCO<sub>2</sub>) and warming. We established subplots of intact prairie and disturbed/invaded prairie within a free-air CO<sub>2</sub> enrichment (to 600 ppmv) by infrared warming (+1.5 °C day, 3 °C night) experiment and followed plant and soil responses for five years. Elevated CO<sub>2</sub> initially led to moderate increases in biomass and plant diversity in both intact and disturbed/invaded prairie, but these effects shifted due to strong eCO<sub>2</sub> responses of the invasive forb <em>Centaurea diffusa</em>. In the final three years, biomass responses to eCO<sub>2</sub> in disturbed/invaded prairie were 10 times as large as those in intact prairie (+186% vs. +18%), resulting in reduced rather than increased plant diversity (-17% vs. +10%). At the same time, warming interacted with disturbance/invasion and year, reducing the rate of topsoil carbon recovery following disturbance. The strength of these interactions demonstrates the need to incorporate disturbance into predictions of climate change effects. In contrast to expectations from studies in intact ecosystems, eCO<sub>2</sub> may threaten plant diversity in ecosystems subject to soil disturbance and invasion.</p>
Data and code for 'Disturbances can facilitate prior invasions more than subsequent invasions in microbial communities'
<p>Data and R code for 'Disturbances can facilitate prior invasions more than subsequent invasions in microbial communities'.</p><p>Information about the files can be found in the README.txt file.</p>
Soil disturbance and invasion magnify CO2 effects on grassland productivity, reducing diversity
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Disentangling the mechanisms underpinning disturbance-mediated invasion data
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Data from: Testing genotypic variation of an invasive plant species in response to soil disturbance and herbivory
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Data from: Habitat use and seed removal by invasive rats (Rattus rattus) in disturbed and undisturbed rainforest, Puerto Rico
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Data from: Muskrat disturbances and their analogues reduce invasive plant dominance within a Great Lakes coastal wetland
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Abiotic and biotic contexts shape the effect of disturbance on non-native plant invasion
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Non-invasive Stimulation Through Nesa and Therapeutic Exercise on Sleep Disturbances on Alzheimer's Disease Patients.
ClinicalTrials.gov study NCT05715866. IPD Sharing: NO. Countries: 1. Publications: 1.
Data from: Linking disturbance and resistance to invasion via changes in biodiversity: a conceptual model and an experimental test on rocky reefs
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Interactive effects of shading and disturbance on plant invasion in an arid shrubland: assembly processes and CSR-strategies
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Data from: Indirect effects of habitat disturbance on invasion: nutritious litter from a grazing resistant plant favors alien over native Collembola
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Supplementary material 1 from: McBrayer LD, Haro D, Brennan M, Falk BG, Yackel Adams AA (2023) Capsaicin-treated bait is ineffective in deterring non-target mammals from trap disturbance during invasive lizard control. NeoBiota 87: 103-120. https://doi.org/10.3897/neobiota.87.102969
Species lists of non-target species disturbing traps set for tegu lizards
Data from: Experimental study of species invasion – early population dynamics and role of disturbance in invasion success
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The Effect of Non Invasive Stellate Ganglion Disrupting on Sleep Disturbances on Postmenopausal Female
ClinicalTrials.gov study NCT07224295. IPD Sharing: NO. Countries: 1. Publications: 0.
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DANDI Archive for NWB datasets
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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.