Use of <i>Posidonia oceanica</i> seedlings from beach-cast fruits for seagrass planting

Terrados, Jorge; Marín, Antonio Riquelme; Celdrán, David

doi:10.1515/bot-2012-0200

Cited by 38 publications

(31 citation statements)

References 41 publications

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“…For seeds, light limitation imposed by mature meadows controls P. oceanica leaf self-shading and plant competition with its own recruits while also promoting increased seedling survival rates in open, uncolonized areas where clonal growth is limited. As stated by Terrados et al (2013), seedlings planted inside a P. oceanica meadow led to complete mortality after 3 years, while seedlings planted in a dead meadow presented a survival rate of 44% during the same time frame. Shading was suggested as the process driving mortality, a conclusion which supports the results of the present study.…”

Section: Discussionmentioning

confidence: 69%

Seed photosynthesis enhances Posidonia oceanica seedling growth

Celdrán

Marín

2013

Ecosphere

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Citation: Celdrán, D., and A. Marín. 2013. Seed photosynthesis enhances Posidonia oceanica seedling growth. Ecosphere 4(12):149. http://dx.Abstract. Posidonia oceanica seeds demonstrate photosynthetic activity during germination as well as throughout seedling development, a fact which suggests that seed photosynthesis can influence seedling growth. This study examines the contribution of seed photosynthesis to changes in leaf and root biomass, the concentration of seed carbohydrate reserves (free sugars and starch) and elemental C, N and P content in seedlings exposed to different light/dark treatments. Green seeds attached to seedlings remained photosynthetically active for three months and photosynthetic activity in the seeds enhanced seedling growth in leaves and roots. It was estimated that ca. 29.26% of leaf biomass and ca. 42.31% of root biomass production was due to seed photosynthetic activity. Photosynthesis occurred at a higher rate in seeds than in leaves during early seedling growth, and extreme light limitation reduced the mobilization of carbon reserves stored in the seeds. These adaptations control leaf self-shading and plant competition in wellestablished P. oceanica beds while also promoting increased seedling survival rates in open, uncolonised areas where clonal growth is limited.

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Section: Discussionmentioning

confidence: 69%

Seed photosynthesis enhances Posidonia oceanica seedling growth

Celdrán

Marín

2013

Ecosphere

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“…The transplant area was located on a seabed dominated by dead matte structures (Tomasello et al, 2009b) (Fig. 6), as some studies have shown that matte is a particularly suitable substratum for planting seagrass (Di Maida et al, 2013;Terrados et al, 2013).. Establishment showed a decreasing trend during the first 3 years of monitoring, followed by stationary values of about 32% in the final three years, while cuttings de-tached from the grids showed the opposite trend, reaching a final value of 61% (Fig.…”

Section: Transplantation In the Gulf Of Palermo Monitoring Resultsmentioning

confidence: 99%

“…Since the 1970s, restoration with P. oceanica in the Mediterranean Sea has been carried out to assess various transplanting and seedling techniques. Transplant success was found to be influenced by the nature of the substratum, with dead matte habitat showing higher survival and growth rates than sand, pebble and rock (Terrados et al, 2013). Also, horizontal rhizomes showed higher survival and growth rates than their vertical counterparts (Molenaar et al, 1993;Piazzi et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Also, horizontal rhizomes showed higher survival and growth rates than their vertical counterparts (Molenaar et al, 1993;Piazzi et al, 2000). The use of vegetative fragments as planting units has proved more effective than seeds, which are less available (Balestri & Cinelli, 2003;Díaz-Almela et al, 2006;Terrados et al, 2013). Transplant donor populations of P. oceanica with the highest genetic variability showed the best growth performance (Procaccini & Piazzi, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Transplantation assessment of degraded Posidonia oceanica habitats: site selection and long-term monitoring

Pirrotta¹,

Tomasello²,

Scannavino³

et al. 2014

Medit. Mar. Sci.

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A model developed for Zostera marina was adapted and used to select suitable areas for Posidonia oceanica transplantation in the Gulf of Palermo, where recent rehabilitation programmes have reduced human pressure. This model consists of three steps: (1) habitat selection, by calculation of the Preliminary Transplant Suitability Index (PTSI); (2) field assessments and test-transplanting, to evaluate the site suitability and to estimate the effects of tearing on transplant units (about 50%); (3) identification of suitable restoration sites, by calculation of the Transplant Suitability Index (TSI). A new parameter was added to the literature model: the number of grids detached, which is linked to factors (hydrodynamic regime, anchoring, fishing) that have a potentially great effect on the final outcome of the transplant. Only one site (TSI = 16) in the Gulf of Palermo was indicated as potentially suitable for restoration with P. oceanica. In this site, a transplant of 40 m2 was implemented. From 2008 to 2014, transplant effectiveness was evaluated in terms of establishment, detachment and mortality of cuttings and shoot density. The long-term monitoring (6 years) allowed us to detect changes in the structural conditions of the transplanted meadow and to identify the possible turning point in P. oceanica recovery (2 years after transplanting). Moreover, 6 years after transplantation the P. oceanica meadow has exceeded the transplant shoot density of about 16%, with a mean and a maximum value of 11.6 and 17 shoots per cutting, respectively.

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“…Dead matte results the most suitable substratum for P. oceanica planting (Di Maida & al. 2013;Terrados & al. 2013).…”

Section: Management and Restoration Strategiesmentioning

confidence: 99%

Human activities trigger change in marine landscape

2018

Fl. Medit.

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online. Biodiversity is undergoing rapid and worrying changes, partially driven by anthropogenic activities. Human impacts and climate change (e.g. increasing temperature and ocean acidification), which act at different spatial scale, represent the most serious threats to biodiversity and ecosystem structure and function. In this overview, the effects of anthropogenic pressures on unique and valuable Mediterranean systems, such as Cystoseira sp. pl. forest and Posidonia oceanica meadows, are examined. These complex systems, characterized by a high associated biodiversity, are regularly exposed to natural and anthropogenic pressures. Due to the central role they have for several important ecological processes in marine ecosystems, their loss can lead dramatic consequences. Since these ecosystems are often unable to recover naturally, it is necessary to reinforce their resilience. Therefore, reintroduction by transplantation and reforestation methods have been recently proposed. Considering future increase in anthropogenic and climatic pressures, understanding how these systems respond to stressors and preserving their resilience should be an essential component of any conservation management plan.

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Use of Posidonia oceanica seedlings from beach-cast fruits for seagrass planting

Cited by 38 publications

References 41 publications

Seed photosynthesis enhances Posidonia oceanica seedling growth

Seed photosynthesis enhances Posidonia oceanica seedling growth

Transplantation assessment of degraded Posidonia oceanica habitats: site selection and long-term monitoring

Human activities trigger change in marine landscape

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