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348 results for “seagrass”
Global patterns and drivers of seagrass biomass, net primary production and meadow structure
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Recovery of a cultivation grazer: A mechanism for compensatory growth of Thalassia testudinum in a Caribbean seagrass meadow grazed by green turtles
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Historic and contemporary biogeographic perspectives on range-wide spatial genetic structure in a widespread seagrass
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Data from: Contrasting effects of rhizosphere and sediment microbiota on seagrass performance in response to a simulated marine heatwave
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Restoration efforts of the seagrass Posidonia oceanica: a collated evidence review dataset
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Incorporating generalist seagrasses enhances habitat restoration in a changing environment
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Identifying gaps in the protection of Mediterranean seagrass habitats using network-based prioritization
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Tropicalization shifts herbivore pressure from seagrass to rocky reef communities
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Sponges facilitate primary producers in a Bahamas seagrass system
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Managing biotic interactions during early seagrass life-stages to improve seed-based restoration
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Data from: Contrasting CO2 dynamics in seagrass meadows between organic carbon (OC)-rich reef and OC-poor terrestrial sediments: Implications for enhanced alkalinity production
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Intraspecific genetic variation matters when predicting seagrass distribution under climate change
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The natural capital of seagrass beds in the Caribbean: evaluating their ecosystem services and blue carbon trade potential
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Exchangeable Ammonium in Seagrass in Hog Island Bay, VA 2008-2010
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Seagrass blue carbon in a Virginia bay chronosequence 2013
This dataset includes average sediment organic carbon concentrations determined for the top 6 cm of the restored South Bay eelgrass bed at sample sites distributed throughout the meadow. The sites occur at different distances from the meadow edge, the perimeter between the meadow and adjacent bare, subtidal areas, and represent different meadow ages due to meadow expansion.
VCR bay depth and seagrass shoot density data for parameterization of GEOMBEST++Seagrass
Data from the Virginia Coast Reserve relating bay fetch-depth and seagrass density-depth used to parameterize GEOMBEST++Seagrass for simulations investigating coupled barrier-marsh-bay evolution. DepthFetch data table: Length, depth, and type (seagrass or bare sediment) of all bathymetric transects used to construct the depth-fetch lookup table in the model. Transects were extracted from all VCR basins using the bathymetry from Richardson et al. (2014 doi:10.6073/pasta/63a22558d6650fae8232b6a8814a90d5), vary in length, and run with the dominant wind direction from basin margin to basin margin. ShootDensity tab: Shoot densities of restored Zostera marina plots in Hog Island Bay binned by depth for years 3-6 of seeding. Data originally from McGlathery (2013 doi:10.6073/pasta/5a6ea442cf59cabb3112bb634a968ae5). The maximum density of each bin is used as a representative shoot density based on depth.
Marsh widths from GEOMBEST++Seagrass simulations of barrier-marsh-bay evolution
Model-derived back-barrier widths from GEOMBEST++Seagrass simulations across a range of input conditions. Simulations are varied by relative sea-level rise (2-7 mm/yr), bay sediment flux (10-80 m^3/m/yr), and export flux (0-25%). All simulations ran until a total of 1 m of sea-level rise was reached. Each row in the spreadsheet represents a single unique set of model conditions, each of which was simulated both with and without the presence of seagrass. The outputs recorded are the final back-barrier marsh widths of simulations with seagrass and without, as well as the difference in marsh width between each corresponding seagrass and no seagrass run.
High seasonal variability in sediment carbon stocks of cold-temperate seagrass meadows
<p>Dataset for "High seasonal variability in sediment carbon stocks of cold-temperate seagrass meadows" containing sedimentary carbon and nitrogen data used in the study. </p>
Data from: Phylogeographic differentiation versus transcriptomic adaptation to warm temperatures in Zostera marina, a globally important seagrass
Populations distributed across a broad thermal cline are instrumental in addressing adaptation to increasing temperatures under global warming. Using a space-for-time substitution design, we tested for parallel adaptation to warm temperatures along two independent thermal clines in Zostera marina, the most widely distributed seagrass in the temperate Northern Hemisphere. A North–South pair of populations was sampled along the European and North American coasts and exposed to a simulated heatwave in a common-garden mesocosm. Transcriptomic responses under control, heat stress and recovery were recorded in 99 RNAseq libraries with ~13 000 uniquely annotated, expressed genes. We corrected for phylogenetic differentiation among populations to discriminate neutral from adaptive differentiation. The two southern populations recovered faster from heat stress and showed parallel transcriptomic differentiation, as compared with northern populations. Among 2389 differentially expressed genes, 21 exceeded neutral expectations and were likely involved in parallel adaptation to warm temperatures. However, the strongest differentiation following phylogenetic correction was between the three Atlantic populations and the Mediterranean population with 128 of 4711 differentially expressed genes exceeding neutral expectations. Although adaptation to warm temperatures is expected to reduce sensitivity to heatwaves, the continued resistance of seagrass to further anthropogenic stresses may be impaired by heat-induced downregulation of genes related to photosynthesis, pathogen defence and stress tolerance.
Data from: Effects of small-scale, shading-induced seagrass loss on blue carbon storage: Implications for management of degraded seagrass ecosystems
1. Seagrass meadows are important global 'blue carbon' sinks. Despite a 30% loss of seagrasses globally during the last century, there is limited empirical research investigating the effects of disturbance and loss of seagrass on blue carbon stocks. 2. In this study, we hypothesised that seagrass loss would reduce blue carbon stocks. Using shading cloth, we simulated small-scale die-offs of two subtropical seagrass species, Halodule wrightii and Thalassia testudinum, in a dynamic northern Gulf of Mexico lagoon. The change in quantity and quality of sediment organic matter and organic carbon were compared among kill, control and bare plots before the kill treatment, shortly after the kill treatment and 11 months after the kill treatment. 210 Pb age dating was performed on bare and Thalassia plots at 11 months to evaluate the impact of sediment erosion in the absence of vegetation. 3. The small-scale die-off led to a 50-65% organic matter (OM) loss in the sediment in the top 8 cm of Halodule plots. Thalassia plots lost significant portions OM (50%) and organic carbon (C; 21-47%) in only the top 1 cm of sediment. The 210 Pb profiles indicated Thalassia die-off reduced the C sequestration rate by 10%, in addition to a loss of ~1 years' worth of C stocks (~22 g m-2<). Furthermore, analyses on O Morg quality indicated a loss of labile OM/C and enhanced remineralisation by microbes. 4. Synthesis and applications: This study provides empirical evidence that small-scale shading-induced seagrass die-offs can reduce seagrass carbon sequestration capacity and trigger losses of blue carbon stocks. While the losses recorded here are modest, these losses in blue carbon storage capacity are notable due to the proximity of shading structures (for example, boat docks) to seagrass habitats. Thus, policies to avoid or protect seagrass habitats from common small-scale, shading disturbances are important for optimising both carbon sequestration capacity and coastline development and management.17-Nov-2017
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International Brain Laboratory public data
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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.