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185 results for “facilitative effects”
Pollinator-mediated facilitation alleviates pollen limitation through effects on the quality of plant reproduction
<p>Facilitation and competition among plants sharing pollinators have contrasting consequences for each species' fitness. However, it is unclear whether pollinator-mediated indirect interactions between plants affect plant fitness in a multispecies context. Here, we investigated how pollinator sharing affects pollen limitation (contribution of pollination to fitness) in a tropical hummingbird-pollinated community marked by facilitation. We employed indices describing how much a plant species is important to shared pollinators (acting degree) and have its shared pollinators influenced by other plants (target degree) within the plant-hummingbird network. Since facilitation often increases pollination quantity but not necessarily quality, we expected both indices to be associated with reductions in pollen limitation estimates that depend on pollination quantity (fruit set and seed number) rather than estimates more strictly related to quality (seed weight and germination). Instead, we found that both indices were associated with reductions in pollen limitation only for seed weight and germination. Thus, facilitation acted on qualitative estimates of pollen limitation. Our results suggest that facilitation may enhance plant fitness even if quantitative components of plant fecundity are already saturated. Overall, we showed that pollinator-mediated indirect effects in a multispecies context are important drivers of plant fitness with consequences for coexistence in diverse communities.</p>
Data from: Environmental variability counteracts priority effects to facilitate species coexistence: evidence from nectar microbes
The order of species arrival during community assembly can greatly affect species coexistence, but the strength of these effects, known as priority effects, appears highly variable across species and ecosystems. Furthermore, the causes of this variation remain unclear despite their fundamental importance in understanding species coexistence. Here, we show that one potential cause is environmental variability. In laboratory experiments using nectar-inhabiting microorganisms as a model system, we manipulated spatial and temporal variability of temperature, and examined consequences for priority effects. If species arrived sequentially, multiple species coexisted under variable temperature, but not under constant temperature. Temperature variability prevented extinction of late-arriving species that would have been excluded owing to priority effects if temperature had been constant. By contrast, if species arrived simultaneously, species coexisted under both variable and constant temperatures. We propose possible mechanisms underlying these results using a mathematical model that incorporates contrasting effects of microbial species on nectar pH and amino acids. Overall, our findings suggest that understanding consequences of priority effects for species coexistence requires explicit consideration of environmental variability.
Data from: Disentangling the heritable and plastic components of the competitive and facilitative effects of an alpine foundation species
Differences in effects between phenotypes of foundation species on subordinate species have been reported, but no study has separated their heritable and plastic components. In a subalpine community of the French Pyrenees, we observed two phenotypes of Festuca gautieri: tight cushions in dry convex outcrops with few subordinate species, and loose cushions in wet concave slopes with many subordinate species, suggesting differences in effects of the two phenotypes on subordinates. Using two reciprocal transplantation gardens, we studied the responses of the two phenotypes to changes in environmental conditions, thus assessing the contribution of heritability and plasticity to the phenotypic variation. Using a target cross-transplantation experiment, we assessed the plasticity and heritability bases of their contrasting effects. We also quantified the recolonisation of resident plants within the reciprocally transplanted cushions. We found that morphological differences between cushions had both heritability and plasticity bases. The two competition experiments showed heritable increase in competitive effects from loose to tight cushions. This was counteracted by plasticity effects, which decreased competition from the benign to the stressful garden. Synthesis. We conclude that heritable effects overcome plasticity effects resulting in higher diversity in the loose phenotype from the benign habitats.
Figure 2 from: Schutze MK, Dammalage T, Jessup A, Vreysen MJB, Wornoayporn V, Clarke AR (2015) Effects of laboratory colonization on Bactrocera dorsalis (Diptera, Tephritidae) mating behaviour: 'what a difference a year makes'. In: De Meyer M, Clarke AR, Vera MT, Hendrichs J (Eds) Resolution of Cryptic Species Complexes of Tephritid Pests to Enhance SIT Application and Facilitate International Trade. ZooKeys 540: 369-383. https://doi.org/10.3897/zookeys.540.9770
Figure 2 - Index of Sexual Isolation (ISI) and relative performance indices for males (MRPI) and females (FRPI) with associated 95% confidence intervals calculated for 2010 and 2011 mating compatibility comparisons between Bactrocera dorsalis from Saraburi and Nakhon Si Thammarat, Thailand. Dotted line (0.00) represents random mating (ISI) or equal participation by the sexes (MRPI and FRPI).
Figure 1 from: Schutze MK, Dammalage T, Jessup A, Vreysen MJB, Wornoayporn V, Clarke AR (2015) Effects of laboratory colonization on Bactrocera dorsalis (Diptera, Tephritidae) mating behaviour: 'what a difference a year makes'. In: De Meyer M, Clarke AR, Vera MT, Hendrichs J (Eds) Resolution of Cryptic Species Complexes of Tephritid Pests to Enhance SIT Application and Facilitate International Trade. ZooKeys 540: 369-383. https://doi.org/10.3897/zookeys.540.9770
Figure 1 - Behavioural parameters of Bactrocera dorsalis flies from Saraburi (S) and Nakhon Si Thammarat (N) (Thailand) during mating compatibility trials in 2010 and 2011. A Relative percentages and total numbers of each possible couple formed. Numbers in bars are total numbers of each couple formed summed across replicates B Mating latency as average time since first couple observed for couples formed C Average percentage of respective couples collected from the tree for each of the six mating compatibility comparisons. For all graphs, columns surmounted by the same letter within a year are not significantly different at α = 0.05.
The Effects of Oral Facial Facilitation and Oral Motor Therapy in Dysphagia
ClinicalTrials.gov study NCT06785220. IPD Sharing: UNDECIDED. Countries: 0. Publications: 27.
The Effect of Neurophysiological Facilitation Techniques on Health Parameters in Early Stages After Open Heart Surgery
ClinicalTrials.gov study NCT06551714. IPD Sharing: YES. Countries: 1. Publications: 0.
The Effects of Proprioceptive Neuromuscular Facilitation Training
ClinicalTrials.gov study NCT04178356. IPD Sharing: UNDECIDED. Countries: 0. Publications: 3.
Chitosan Dressings to Facilitate Safe Effective Debridement of Chronic Wounds & Minimize Wound Bacterial Re-colonization
ClinicalTrials.gov study NCT01035944. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effects of ElDOA and Post-Facilitation Stretching Technique on Pain and Disability in Patients With Text Neck Syndrome
ClinicalTrials.gov study NCT05048992. IPD Sharing: NO. Countries: 1. Publications: 0.
Effects of Neural Glides Versus Proprioceptive Neuromuscular Facilitation in Cervical Radiculopathy
ClinicalTrials.gov study NCT04824170. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Environmental variability counteracts priority effects to facilitate species coexistence: evidence from nectar microbes
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Data from: Plant functional diversity and nutrient availability can improve restoration of floating fens via facilitation, complementarity and selection effects
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Data from: Disentangling the heritable and plastic components of the competitive and facilitative effects of an alpine foundation species
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Data from: Higher iridescent-to-pigment optical effect in flowers facilitates learning, memory and generalization in foraging bumblebees
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Data from: Viewing images of snakes accelerates making judgments of their color in humans: red snake effect as an instance of ‘emotional Stroop facilitation’
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Pollinator-mediated facilitation alleviates pollen limitation through effects on the quality of plant reproduction
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Data from: Additive effects of nurse and facilitated plants on ecosystem functions
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KSHV chromatin looping facilitates effective gene expression: high-resolution mapping of K-Rta binding sites in the KSHV genome
GEO Series GSE99950. Homo sapiens. 6 samples. Type: Other; Genome binding/occupancy profiling by high throughput sequencing.
IL-33-ST2 axis regulates myeloid cell differentiation and activation facilitating effective club cell regeneration
GEO Series GSE155361. Mus musculus. 29 samples. Type: Expression profiling by high throughput sequencing.
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