scholarly journals Monitoring bubble production in a seagrass meadow using a source of opportunity

2017 ◽  
Author(s):  
Paulo Felisberto ◽  
Orlando C. Rodríguez ◽  
João P. Silva ◽  
Sérgio Jesus ◽  
Hugo Q. Ferreira ◽  
...  
Keyword(s):  
Seagrass Meadow ◽  
Bubble Production

Monitoring bubble production in a seagrass meadow using a source of opportunity

2017 ◽  
Vol 141 (5) ◽  
pp. 3529-3529
Author(s):  
Paulo Felisberto ◽  
Orlando C. Rodríguez ◽  
João P. Silva ◽  
Sergio Jesus ◽  
Hugo Quental-Ferreira ◽  
...  
Keyword(s):  
Seagrass Meadow ◽  
Bubble Production

Sub-Hinze scale bubble production in turbulent bubble break-up

2021 ◽  
Vol 917 ◽  
Author(s):  
Aliénor Rivière ◽  
Wouter Mostert ◽  
Stéphane Perrard ◽  
Luc Deike
Keyword(s):  
Break Up ◽  
Bubble Production

Abstract

Seagrass surveys in Shwe Thaung Yan coastal areas, the southern part of Rakhine Coastal Region, Myanmar: biodiversity, coverage and biomass

2019 ◽  
Vol 8 (3) ◽  
pp. 105-112
Author(s):  
Thu- Rein
Keyword(s):  
Seasonal Variations ◽  
Seagrass Meadow ◽  
Monsoon Season ◽  
Coastal Region ◽  
Coastal Areas ◽  
Dry Season ◽  
Percent Cover ◽  
Study Sites ◽  
Seagrass Coverage

Studies on percent cover and biomass of seagrasses from Shwe Thaung Yan coastal areas (Inn Din Gyi, Kyauk Nagar and Phoe Htaung Gyaing), the Southern parts of Rakhine Coastal Region, were carried out between March and August, 2018. A total of 8 species of seagrasses, namely Syringodiumisoetifolium (Ascherson) Danty, Halodulepinifolia (Miki) den Hartog, Haloduleuninervis (Forsskal) Ascherson, Cymodocearotundata Ehrenberg et Hemprich ex Ascherson, C. serrulata (R. Brown) Ascherson et Magnus, Thalassiahemprichii(Ehrenberg) Ascherson, Halophila major (Zoll.) Miquel and Enhalusacoroides (Linnaeus f.) Royle, were recorded in three study sites. Seagrass meadow in this study showed seasonal variations in both percent cover and biomass. Total seagrass coverage and biomass were higher in the dry season than in the monsoon season. Total seagrass coverage ranged between 8% and 75% in Phoe Htaung Gyaing, between 10% and 42% in Kyauk Nagar, and between 15% and 43% in Inn Din Gyi. Total seagrass mean biomass was 50.2413-259.846gdry.wtm-2 in Phoe Htaung Gyaing, 63.0194 -321.535gdry.wtm-2 in Kyauk Nagar, and 98.6819-416.237gdry.wtm-2 in Inn Din Gyi.

scholarly journals Intra and inter annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015

2018 ◽  
Vol 66 (3) ◽  
pp. 1149 ◽  
Author(s):  
Margarita Loría-Naranjo ◽  
Jimena Samper-Villarreal ◽  
Marylaura Sandoval-Siles ◽  
Jorge Cortés
Keyword(s):  
Costa Rica ◽  
Leaf Area ◽  
Turnover Rate ◽  
Seagrass Meadow ◽  
Seagrass Beds ◽  
Seagrass Bed ◽  
Monitoring Methods ◽  
Caribbean Coast ◽  
Area Index ◽  
The Caribbean

Seagrass beds are an important ecosystem on the Caribbean coast of Costa Rica. At Cahuita National Park (CNP) a seagrass bed at Perezoso has been monitored continually since 1999 within the CARICOMP program. Thalassia testudinum is the dominant seagrass species, in some cases mixed with Syringodium filiforme. The results from the 2009 to 2015 monitoring period are presented here, and contrasted with data before 2009. Total (above and below ground tissue) mean biomass of T. testudinum was higher (1 255.4 ± 146.0 gm-2) than biomass before 2009, with an increasing tendency. However, productivity (1.5±0.59 gm-2d-1) and turnover rate (4.3 ± 1.22 %d-1) were lower than previous monitoring periods. In this period, mean leaf area diminished considerably (4.9 ± 2.30 m2), but leaf area index (LAI) increased (1.9 ± 0.80 m2leafm-2) in comparison to prior monitoring. Productivity, density, turnover rate, LAI and biomass showed intra-annual variations; while mean biomass of T. testudinum did not vary significantly among years. No correlations were found between water salinity, temperature and clarity with seagrass measurements. However, most seagrass parameters were strongly correlated with precipitation. These results highlight the effect of external environmental agents acting on the ecosystem. CNP presents a long-term stable seagrass meadow. However, there are indirect signals, such as high biomass and above-ground biomass proportion, along with low productivity and LAI, which point to a nutrient increment in Perezoso’s seagrass bed. To continue protecting this seagrass bed, it is necessary to improve monitoring methods, and seagrass beds should be included in national conservation policies and monitoring programs.

scholarly journals Characterization of a resilient seagrass meadow during a decline period

2018 ◽  
Vol 82 (1) ◽  
pp. 67 ◽  
Author(s):  
Bárbara Ondiviela ◽  
Lina Fernández ◽  
Araceli Puente ◽  
Gerardo García-Castrillo ◽  
José A. Juanes
Keyword(s):  
Seagrass Meadow ◽  
Large Population ◽  
Sea Surface ◽  
Biological Traits ◽  
Benthic Assemblages ◽  
Biomass Density ◽  
Zostera Noltei ◽  
Poor Understanding ◽  
Freshwater Influence

Seagrasses are globally threatened ecosystems with essential ecological roles. An important limitation in seagrass conservation efforts is the poor understanding of resilient meadows. The present work studies a meadow, which maintained a large population of Zostera marina and Zostera noltei, during the decline of seagrasses in the Bay of Santander (from 1984 to 2000). The work examines resilience parameters related to the biological traits (biomass, density, length and width of the leaves) and to the associated benthic assemblages. The maturity of the meadow and the changing environmental conditions induced by the torrential regime of the Miera River, have likely improved the resistance to the periods of stress. The adaptation to these fluctuating conditions is reflected in a high seasonal and spatial variability in the biomass, density, morphological traits and benthic assemblages. These variations are related to the summer peaks in the PAR, the sea surface temperature and the freshwater influence along the discharge of the Miera River. This work provides the first seagrass data in Cantabria. The data are dated in the early 2000s and constitute a baseline study for the Bay of Biscay.

Ecosystem monitoring of a seagrass meadow using wideband acoustic measurements

2021 ◽  
Vol 150 (4) ◽  
pp. A351-A351
Author(s):  
Megan S. Ballard ◽  
Kevin M. Lee ◽  
Andrew R. McNeese ◽  
Gabriel R. Venegas ◽  
Abdullah F. Rahman ◽  
...  
Keyword(s):  
Seagrass Meadow ◽  
Acoustic Measurements ◽  
Ecosystem Monitoring

A new non-diffusional gas bubble production route in used nuclear fuel: implications for fission gas release, cladding corrosion, and next generation fuel design

2020 ◽  
Vol 22 (11) ◽  
pp. 6086-6099 ◽  
Author(s):  
Jon M. Schwantes ◽  
Jacob L. Bair ◽  
Edgar C. Buck ◽  
Ram Devanathan ◽  
Sean H. Kessler ◽  
...  
Keyword(s):  
Phase Particle ◽  
Gas Bubble ◽  
Gas Release ◽  
Used Nuclear Fuel ◽  
Production Route ◽  
Fission Gas ◽  
Fuel Design ◽  
Phase Map ◽  
Fission Gas Release ◽  
Bubble Production

“Phase” map showing Noble metal phase particle (orange) and U fuel fragments (green and yellow) ejected into Zr cladding (red and blue) as a result of Xe bubble rupture.

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