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64 results for “seedling establish”
Data from: Seed functional traits as predictors of seedling establishment success in Brazilian tropical forest restoration
<p>Several ecological filters in deforested and degraded areas reduce seedling emergence and establishment and hinder ecological restoration by direct seeding. Understanding whether functional traits are related to a species' capacity to overcome these filters and predict their field performance might improve the success of direct seeding techniques for ecological restoration. We assessed eight seed functional traits of tropical tree species, seeking those that best explained their establishment success in direct seeding restoration projects. We analyzed a dataset from 52 studies that tested direct seeding techniques with tree species in Brazil. From each study, we collected the mean establishment percentage for all tree species. Seed mass, cotyledon function, and germination speed were the only functional traits that significantly affected the species establishment percentage in direct seeding restoration projects. Species with larger seeds, storage cotyledons, and faster germination had higher establishment percentages. Choosing species with these functional traits for seed mixes will provide higher establishment percentages and, consequently, improve restoration success by direct seeding techniques.</p>
Data and model code for study: Mechanistic modelling of marsh seedling establishment provides a positive outlook for coastal wetland restoration under global climate change
<p>This folder will include data and model code for study: Mechanistic modelling of marsh seedling establishment provides a positive outlook for coastal wetland restoration under global climate change.</p>
Data from: Earthworm invasion, white-tailed deer and seedling establishment in deciduous forests of northeastern North America
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Data from: Seed functional traits as predictors of seedling establishment success in Brazilian tropical forest restoration
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Data from: Biotic-drivers of seedling establishment in Neotropical savannas: selective granivory and seedling herbivory by leaf-cutter ants as an ecological filter
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Data from: The mechanisms affecting seedling establishment in restored savanna understories are seasonally dependent
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Data from: Global drivers of tree seedling establishment at alpine treelines in a changing climate
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Data from: Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems
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Data from: Competitor or facilitator? The ambiguous role of alpine grassland for the early establishment of tree seedlings at treeline
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Data from: Dung beetle activity affects rainforest seed bank dynamics and seedling establishment
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Data from: Stronger effect of gastropods than rodents on seedling establishment, irrespective of exotic or native plant species origin
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Data from: Snail herbivory affects seedling establishment in a temperate forest in the Ozark region
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Data from: Dung beetle activity had no positive effect on nutrient concentration or performance of established rainforest seedlings
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Data from: Ectomycorrhizas and tree seedling establishment are strongly influenced by forest edge proximity but not soil inoculum
Reforestation is challenging when timber harvested areas have been degraded, invaded by non-native species, or are of marginal suitability to begin with. Conifers form mutualistic partnerships with ectomycorrhizal fungi (EMF) to obtain greater access to soil resources, and these partnerships may be especially important in degraded areas. However, timber harvest can impact mycorrhizal fungi by removing or compacting topsoil, removing host plants, and warming and drying the soil. We used a field experiment to evaluate the role of EMF in Douglas-fir reforestation in clearcuts invaded by Cytisus scoparius (Scotch broom) where traditional reforestation approaches have repeatedly failed. We tested how planting distance from intact Douglas-fir forest edges influenced reforestation success and whether inoculation with forest soils can be used to restore EMF relationships. We used an Illumina DNA sequencing approach to measure the abundance, richness and composition of ectomycorrhizal fungi on Douglas-fir roots, and assessed differences in Douglas-fir seedling survival and growth near to and far from forest edges with and without forest soil inoculum. Planting Douglas-fir seedlings near forest edges increased seedling survival, growth and EMF root colonization. Edge proximity had no effect on EMF richness but did change fungal community composition. Inoculations with forest soil did not increase EMF abundance or richness or change community composition, nor did it improve seedling establishment. With Illumina sequencing we identified two to three times greater species richness than described in previous edge effects studies. Of the 95 EMF species we identified, 40% of the species occurred on less than 5% of the seedlings. The ability to detect fungi at low abundance may explain why we did not detect differences in EMF richness with distance to hosts as previous studies. Our findings suggest that forest edges are suitable for reforestation, even when the interiors of deforested areas are not. We advocate for timber harvest designs that maximize edge habitat where ectomycorrhizal fungi contribute to tree establishment. However, this study does not support the use of inoculation with forest soil as a simple method to enhance EMF and seedling survival.
Data from: Global change impacts on arid zone ecosystems: Seedling establishment processes are threatened by temperature and water stress
<p><span><span><span><span><span><span><span><span><span><span><span>Recruitment for many arid-zone plant species is expected to be impacted by the projected increase in soil temperature and prolonged droughts associated with global climate change. As seed dormancy is considered a strategy to avoid unfavourable conditions, understanding the mechanisms underpinning vulnerability to these factors is critical for plant recruitment in intact communities, as well as for restoration efforts in arid ecosystems. This study determined the effects of temperature and water stress on recruitment processes in six grass species in the genus <i>Triodia </i>R.Br. from the Australian arid zone. Experiments in controlled environments were conducted on dormant and less-dormant seeds at constant temperatures of 25, 30, 35 and 40°C, under well-watered (Psi<sub>soil</sub> = -0.15 MPa) and water-limited (Psi<sub>soil</sub> = -0.35 MPa) conditions. Success at three key recruitment stages – seed germination, emergence and survival– and final seed viability of un-germinated seeds was assessed.<i> </i>For all species, less dormant seeds germinated to higher proportions under all conditions, however, subsequent seedling emergence and survival was higher in the more dormant seed treatment. An increase in temperature (35–40°C) under water-limited conditions caused 95–100% recruitment failure, regardless of the dormancy state. Ungerminated seeds maintained viability in dry soil, however, when exposed to warm (30-40°C) and well-watered conditions, loss of viability was greater from the less dormant seeds across all species. This work demonstrates that the transition from seed to established seedling is highly vulnerable to microclimatic constraints, and represents a critical filter for plant recruitment in the arid-zone. As we demonstrated temperature and water stress-driven mortality between seeds and established seedlings, understanding how these factors influence recruitment in other arid-zone species should be a high priority consideration for management actions to mitigate the impacts of global change on ecosystem resilience. The knowledge gained from these outcomes must be actively incorporated into restoration initiatives.</span></span></span></span></span></span></span></span></span></span></span></p>
Data from: Ectomycorrhizas and tree seedling establishment are strongly influenced by forest edge proximity but not soil inoculum
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Data from: Global change impacts on arid zone ecosystems: Seedling establishment processes are threatened by temperature and water stress
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Data from: Can the environment have a genetic basis? a case study of seedling establishment in Arabidopsis thaliana
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Data from: Bryophyte traits explain climate-warming effects on tree seedling establishment
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Data from: High throughput sequencing combined with null model tests reveals specific plant-fungi associations linked to seedling establishment and survival
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International Brain Laboratory public data
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OpenNeuro
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