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| Registros recuperados: 45 | |
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| Sghaier, Y. R.; Zakhama-Sraieb, R.; Charfi-Cheikhrouha, F.. |
| Two sampling stations were selected in order to assess the response of the seagrass to lagoon conditions. Leaf growth was estimated using Zieman method and rhizome production was evaluated by marking rhizome terminals. The vegetative development of C. nodosa inside the lagoon at the limit of its distribution is different from that observed close to the communication channel with the sea. The growth of C. nodosa show a clear unimodal cycle in the two stations reaching maximum leaf development in summer. Shoot density decreased from 915 to 500 shoot m-2 from the communication channel toward the lagoon. The average total biomass varied between 241.6 ± 34 g DW m-2 and 413.8 ± 46 g DW m-2. Leaf plastochrone interval varied seasonally with an annual average of... |
| Tipo: Journal Contribution |
Palavras-chave: Salinity; Biomass; Seagrass; Lagoons; Water temperature; Lagoons; Salinity; Biomass. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5305 |
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| Mabrouk, L.; Hamza, A.; Sahraoui, H.; Bradai, M.N.. |
| Le présent travail présente les résultats relatifs à la caractérisation de l’état de l’herbier de Posidonia oceanica de la zone de Mahdia, moyennant l’étude de la phénologie, au niveau de huit stations reparties sur cette zone pendant les saisons estivales et hivernales. Les herbiers de Posidonia oceanica prospectés de la région de Mahdia sont pour la plupart en très bon état; cependant, nous avons mis en évidence une mauvaise vitalité à Ben Ghayadha, à Sidi Salem et au la station Corniche. Le suivi de la variation saisonnière de l’état des herbiers fait apparaître une réduction de la longueur moyenne des feuilles adultes et intermédiaires, l’augmentation du nombre moyen des feuilles intermédiaires et une réduction de la surface foliaire depuis l’été... |
| Tipo: Journal Contribution |
Palavras-chave: Seagrass. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4594 |
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| Sghaier, Y.R.; Zakhama-Sraieb, R.; Charfi Cheikhrouha, F.. |
| La structure, la phénologie et la croissance des faisceaux des herbiers à Posidonia oceanica ont été étudiées dans quatre sites au niveau du centre Est de la Tunisie (Hergla, El Kantaoui, Monastir et Mahdia). La densité des faisceaux, le recouvrement et les paramètres phénologiques présentent une différence significative entre les sites et les profondeurs en relation avec l’intensité des activités humaines. Les herbiers les plus denses (441 à 984 faisceaux m-²) et les indices foliaires les plus élevés (8,5 à 13m2 m-²)) ont été enregistrés à Mahdia. Le nombre moyen des feuilles produites annuellement ne montre pas de différence significative entre les sites et les profondeurs étudiées. La croissance du rhizome de Posidonia oceanica est considérablement plus... |
| Tipo: Journal Contribution |
Palavras-chave: Seagrass; Seaweeds. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4738 |
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| Magalhães,Karine M.; Borges,João C.G.; Pitanga,Maria E.. |
| The present paper presents the first population data for the Southern Hemisphere of the rare seagrass Halophila baillonis. The population studied is located in a calm, reef-protected area at depths ≤ 5 m, covering 12,000 m2 (400 m long by 30 m wide, oriented parallel to the coastline). The population generally demonstrated low shoot density and biomass during the rainy season, with significant differences between seasons, being found only for aboveground biomass. Despite the identification of this new population, the species continues to be considered rare along the Brazilian coast. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vulnerable species; New population; Seagrass; Shoot density. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200861 |
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| Acosta-Chaparro,Andrés; Sánchez-Valencia,Laura; Gómez-López,Diana Isabel; Gónzalez-Corredor,Juan David; Navas-Camacho,Raúl. |
| ABSTRACT Seagrass meadows have stood out for being very effective fixing atmospheric carbon, among others, due to their ability to produce plant biomass. Therefore, the values of shoot density (m2), biomass (cores) and carbon present in 12 locations with Thalassia testudinum at the Colombian Caribbean (La Guajira and San Andrés Island) were quantified. The biological samples were processed in laboratory until obtaining the values of aerial, underground and total dry weight, and the estimation of the carbon was stablishing from a ratio of 35 % of the dry biomass. Statistical tests were carried out to determine significant differences between the sites, highlighting the aerial biomass in La Guajira and the underground biomass in San Andrés. It was calculated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seagrass; Colombia; Biomass; Blue carbon.. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000100137 |
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| Registros recuperados: 45 | |
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