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4 results for “seed-based restoration”
Managing biotic interactions during early seagrass life-stages to improve seed-based restoration
<p>1. Seagrasses are declining globally, and effective restoration actions to promote the recovery of degraded meadows are urgently needed. Harnessing positive plant interactions during early life stages is considered a valuable strategy to improve terrestrial and coastal habitat restoration. Yet, its application to seagrass restoration is still in infancy, and very little is known on the role played by biotic interactions in shaping newly established populations. 2. We assessed the feasibility of manipulating intra- and interspecific plant interactions to enhance seed-based restoration success using the seagrass <i>Posidonia oceanic</i>a as a model. Specifically, we investigated in mesocosm whether seed germination increased with increasing seed density and whether increasing seedling density and planting a pioneer seagrass promoted facilitation among seedlings. To do this, seedlings were grown either as a single individual or in clumps of medium and high density, with and without <i>Cymodocea nodosa</i>, for two years encompassing their most critical growth stage. 3. Germination of <i>P. oceanica</i> seeds was not affected by seed density. <i>Posidonia oceanica</i> seedlings planted at medium and high density showed higher survival than those planted individually but only in the presence of <i>C. nodosa</i>. Seedlings planted at medium and at high density with <i>C. nodosa</i> performed better than those grown at low density or without <i>C. nodosa</i> due to a positive joint effect of intra- and interspecific interaction. <i>Cymodocea nodosa</i> plants grown with<i> P. oceanica</i> seedlings at high density were larger than those grown alone, indicating a mutualistic relationship. 4. Synthesis and applications: Our results show that in seagrasses positive interactions during early life stages can be promoted by planting seedlings in dense clumps in association with an early successional species. The incorporation of this novel nature-based approach in seed-based restoration could accelerate the recolonization of degraded seagrass habitats. In planning future seed-based restoration interventions, managers should assess both intra- and interspecific interactions established by seedlings of target species for identifying proper planting density/spatial configuration and potential benefactor species promoting facilitative mechanisms to maximize seedling planting success.</p>
Managing biotic interactions during early seagrass life-stages to improve seed-based restoration
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Tipping the balance: the role of seed density, abiotic filters, and priority effects in seed-based wetland restoration
<p class="MsoNormal"><a name="_Hlk98319335"></a>Sowing native seeds is a common approach to reintroduce native plants to degraded systems. However, this method is often overlooked in wetland restoration despite the immense global loss of diverse native wetland vegetation. Developing guiding principles for seed-based wetland restoration is critical to maximize native plant recovery, particularly in previously invaded wetlands. Doing so requires a comprehensive understanding of how restoration manipulations, and their interactions, influence wetland plant community assembly. With a focus on the invader <em>Phragmites australis, </em>we established a series of mesocosm experiments to assess how native sowing density, invader propagule pressure, abiotic filters (water and nutrients), and native sowing timing (i.e., priority effects) interact to influence plant community cover and biomass in wetland habitats. Increasing the density of native seeds yielded higher native cover and biomass, but <em>P. australis</em> suppression with increasing sowing densities was minimal. Rather, community outcomes were largely driven by invader propagule pressure—<em>Phragmites australis</em> densities of <span><span>≤ 500 seeds/m<sup>2</sup> maintained high native cover and biomass. Low-water conditions increased the susceptibility of <em>P. australis</em> to native competition. </span>Early sowing of native seeds showed a large and significant benefit to native cover and biomass, regardless of native sowing density, suggesting that priority effects can be an effective restoration manipulation to enhance native plant establishment.<em> </em></span><span><span>Given the urgent wetland restoration need combined with the limited studies on seed-based wetland restoration, these findings provide guidance on restoration manipulations that are grounded in ecological theory to improve seed-based wetland restoration outcomes.</span></span></p>
Tipping the balance: the role of seed density, abiotic filters, and priority effects in seed-based wetland restoration
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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.