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Materias : 241713 Ecología vegetal

Fecha de publicación : 2013

Fecha de depósito: 7-may-2013

Tipo de documento: Pre-print

En : Journal of experimental marine biology and ecology, North-Holland, Elsevier, 0022-0981, v. 439, p. 42-46





Author: Tuya, F.Espino, FernandoTerrados, J.

Source: https://acceda.ulpgc.es


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1 Preservation of seagrass clonal integration buffers against burial stress F.
Tuyaa*, F.
Espinoa, J.
Terradosb a Centro en Biodiversidad y Gestión Ambiental, Marine Sciences Faculty, Universidad de Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain b Instituto Mediterráneo de Estudios Avanzados, IMEDEA (CSIC-UIB), C- Miquel Marquès, 21 - 07190 Esporles, Islas Baleares, Spain *Corresponding author at: Centro en Biodiversidad y Gestión Ambiental, Marine Sciences Faculty, Universidad de Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain.
Tel: 34 928452900; fax: 34 928452900. E-mail adress: ftuya@yahoo.es 2 ABSTRACT.
The survivorship and performance of seagrasses are affected by environmental stressors, yet clonal integration of seagrasses can ameliorate these adverse environmental changes.
We experimentally assessed the response of the seagrass Cymodocea nodosa (Ucria) Ascherson off Gran Canaria to changes in the intensity of burial, determining whether responses could be modulated by the clonal integration of the plant.
Plants were buried in situ to 0 (‛ambient’), 8 (‛moderate’) and 24 cm (‛high’) within PVC cylinders, which were left untouched or isolated from adjacent shoots by sawing their clonal connection.
The number of living shoots under ‛moderate’ and ‛high’ burial scenarios declined with time when the clonal integration was severed.
After 15 weeks, cores were harvested.
The effect of burial over of C. nodosa depended on whether the clonal integration was maintained or severed.
When the clonal integration was maintained, the shoot density, the number of leaves, the above-ground biomass and the leaf length did not change significantly with burial levels.
When the clonal integration was severed, the shoot density and the number of leaves were larger in cores under ‛ambient’ and ‛moderate’ than ‛high’ burial levels, the above-ground biomass was larger under ‛ambient’ than ‛moderate’ and...






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