Distribution and reproductive phenology of the seagrass Cymodocea nodosa (Ucria) Ascherson in the Canary Islands

Reyes, J.; Sansón, Marta; Afonso-Carrillo, Julio

doi:10.1016/0304-3770(95)00451-5

Cited by 67 publications

(47 citation statements)

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“…The high seasonality of C. nodosa in Ria Formosa is likely related to the very broad temperature range recorded there (238C). Although the range of values differed, the rate of leaf appearance is similar in temporal patterns to those observed in Mediterranean meadows (Terrados andRó s 1992, Pé rez et al 1994) and on the Canary Islands (Reyes et al 1995). As observed by these authors, the maximal and minimal rates of leaf appearance and leaf fall coincide in time, which reflects the higher rates of leaf renovation in spring and summer (May-July).…”

Section: Discussionsupporting

confidence: 69%

“…Leaf growth was highest from June to July, and leaf productivity per shoot per day peaked during July and August, whereas these parameters were minimal during February. Reyes et al (1995) found a similar leaf growth pattern in the Canary Islands, although the minimum values in Ria Formosa are delayed by two months in relation to the Canary Islands. The period of minimal and maximal leaf number found for meadows in Ria Formosa is also delayed by one to two months in relation to that in the Canary Islands.…”

Section: Discussionsupporting

confidence: 54%

“…Leaf production estimates during peak season (up to 14 g DW m -2 d -1 ) was substantially greater for Ria Formosa than those estimated for the Mediterranean regions of Bay of Piran (2.8 g DW m -2 d -1 , Peduzzi and Vukovič 1990) and for the Mar Menor (1.5 g DW m -2 d -1 , Terrados and Ró s 1992), but are quite close to the leaf production observed in the lagoon of Venice (12.3 g DW m -2 d -1 , Rismondo et al 1997) and the Urbino lagoon (17.5 g DW m -2 d -1 , Agostini et al 2003). The extent of annual variability in leaf size, growth, production and appearance and loss rates in the Cymodocea nodosa meadows studied was high, as observed for other temperate C. nodosa meadows, exceeding that for the Mar Menor meadows (0.5-0.8 mg DW shoot -1 day -1 for May-July; Terrados and Ró s 1992) and subtropical meadows in the Canary Islands (Reyes et al 1995). Leaf growth was highest from June to July, and leaf productivity per shoot per day peaked during July and August, whereas these parameters were minimal during February.…”

Section: Discussionmentioning

confidence: 64%

“…As observed by these authors, the maximal and minimal rates of leaf appearance and leaf fall coincide in time, which reflects the higher rates of leaf renovation in spring and summer (May-July). The rate of leaf loss observed by Reyes et al (1995) The number of leaves produced in one year is close to estimates using the reconstruction methods for the same population in Ria Formosa (Cunha and Duarte 2005) and for other locations (11 leaves shoot -1 y -1 , Caye and Meinesz 1985; 13 leaves shoot -1 y -1 , Pé rez 1989; 10 leaves shoot -1 y -1 , Peduzzi and Vukovič 1990; 11-12 leaves shoot -1 y -1 , Terrados 1991, Terrados and Ró s 1992; 13 leaves shoot -1 y -1 , Reyes 1993) and confirm that the annual number of leaves produced by Cymodocea nodosa shoots is relatively constant. In summary, the results reported here indicate that habitat conditions in the Ria Formosa lagoon allow the development of lush meadows supporting highly productive and large shoots, despite being located at the northern limit of the distributional range in the Atlantic Ocean.…”

Section: Discussionmentioning

confidence: 99%

“…Most studies on the Present address: Centro de Ciȩ ncias do Mar (CCMAR), Unia versidade do Algarve, Campus de Gambelas,Portugal. phenology and biomass of the species have been conducted in the Mediterranean Sea (Caye and Meinesz 1985, Peduzzi and Vukovič 1990, Buia and Mazella 1991, Terrados and Ró s 1992, Pé rez et al 1994, Mostafa 1996, Rismondo et al 1997, Agostini et al 2003, Terrados et al 2006, whereas research on the biomass and growth of the species in the Atlantic coast is limited to observations in North Africa, including those in the Canary Islands (Reyes 1993, Reyes et al 1995, and Mauritania (Van Lent et al 1991, Vermaat et al 1993.…”

Section: Introductionmentioning

confidence: 99%

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Biomass and leaf dynamics of Cymodocea nodosa in the Ria Formosa lagoon, South Portugal

Cunha

Duarte

2007

Botm

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We describe shoot density, aboveground and belowground biomass, form and leaf production per shoot over a one-year cycle for Cymodocea nodosa meadows in the Ria Formosa lagoon (South Portugal). Habitat conditions in Ria Formosa allow the development of lush meadows (up to 1752 shoots m -2 ), supporting high shoot biomass (up to 945 g DW m -2 ), high leaf productivity (up to 14 g DW m -2 d -1 ) and large shoots (up to 113 cm leaf length) despite being located at the northern limit of the distributional range in the Atlantic Ocean. Biomass in the meadows examined is higher than other Atlantic sites with C. nodosa, and comparable to the most productive seagrass meadows yet reported. Shoot morphometry and biomass distribution were variable within Ria Formosa, with the stands growing in muddy sediments having a lower ratio of belowground/aboveground biomass than those in sandy sites. C. nodosa had a clear unimodal growth cycle, reaching maximum leaf development in summer. Mean leaf length and number of leaves per shoot, the rate of appearance of new leaves and the rate of leaf fall, average leaf growth and leaf turnover rates (P/B) were minimal in February and March, and maximal in July and September. The high production of the meadows examined may be related to the high nutrient availability in Ria Formosa, evidenced by the high leaf nutrient content (3.4% of DW and 0.38% of DW for nitrogen and phosphorus, respectively).

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Section: Discussionsupporting

confidence: 69%

Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomass and leaf dynamics of Cymodocea nodosa in the Ria Formosa lagoon, South Portugal

Cunha

Duarte

2007

Botm

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Size distribution approaches for monitoring and conservation of coastal Cymodocea habitats

Orfanidis¹,

Papathanasiou²,

Gounaris³

et al. 2009

Aquatic Conservation

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ABSTRACT1. Cymodocea nodosa's leaf length distribution was studied as an easily measurable indicator to monitor and conserve Macedonian, North Aegean, Greek coastal habitats.2. Three Cymodocea meadows off the eastern Kavala Gulf coast (Nea Karvali, Erateino, Agiasma), with that of Nea Karvali close to an industrial area being the most degraded, were sampled during the seagrass main growing season in July 2004. Two further meadows, one pristine to less degraded (Brasidas, Gulf of Kavala) and one degraded (Biamyl, Inner Thessaloniki Gulf ), were sampled as benchmarks in July 2005. The results were evaluated using Gaussian fit curves, and non-parametric and nested parametric ANOVA on a hierarchy of spatial scales: area (tens of metres), site (hundreds of metres) and meadow (kilometres).3. Frequency (%) distribution of leaf length values and CymoSkew index variation were best associated with anthropogenic stress. Frequency (%) distribution of adult and intermediate photosynthetic leaf length values revealed a unimodal distribution possible to be fitted, at least at pristine to less degraded meadows, by normal distribution (R 2 40.5). 4. Statistically significant variation was estimated for CymoSkew index, a quantitative expression of leaf length asymmetry, on the meadow scale (Po0.001). Biamyl (3.82) and Nea Karvali (3.64) were indicated as heavily degraded meadows, Erateino (2.93) as a degraded meadow, Agiasma (2.18) as a meadow with the first signs of degradation, and Brasidas (1.68) as a pristine to less degraded meadow. These results in combination with other meadow specific biotic parameters were used to suggest a preliminary angiosperm 'Ecological Status Classes' classification scheme useful for the implementation of WFD in the north Aegean Sea.5. The CymoSkew index seems to respond to lower levels of stress than is needed for other more conservative plant modules and therefore, could be regarded as an early warning indicator of Cymodocea habitat degradation.

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Ecology of Seagrass Seeds and Seagrass Dispersal Processes

Orth

Harwell

Inglis

Seagrasses: Biology, Ecologyand Conservation

101

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Distribution and reproductive phenology of the seagrass Cymodocea nodosa (Ucria) Ascherson in the Canary Islands

Cited by 67 publications

References 14 publications

Biomass and leaf dynamics of Cymodocea nodosa in the Ria Formosa lagoon, South Portugal

Biomass and leaf dynamics of Cymodocea nodosa in the Ria Formosa lagoon, South Portugal

Size distribution approaches for monitoring and conservation of coastal Cymodocea habitats

Ecology of Seagrass Seeds and Seagrass Dispersal Processes

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