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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Preservation of seagrass clonal integration buffers against burial stress
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Preservation of seagrass clonal integration buffers against burial stress

机译：保存海草克隆整合缓冲液以抗埋葬胁迫

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摘要

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 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 'high' burial levels, and the leaf length was larger in 'ambient' than in cores under 'high' burial. The below-ground biomass was not affected by burial and clonal integration. The internodal length of vertical rhizomes increased with burial; this increase was larger when the clonal integration was severed. In conclusion, preservation of the clonal integration of the seagrass C. nodosa buffered seagrass performance against small-scale burial events.
机译：海草的生存和性能受到环境压力的影响，但是海草的克隆整合可以缓解这些不利的环境变化。我们实验性地评估了大加那利岛海藻Nodosa（Ucria）Ascherson对埋葬强度变化的响应，确定该响应是否可以通过植物的克隆整合来调节。将植物原位埋在PVC圆柱体中的0（“环境”），8（“中等”）和24厘米（“高”）位置，通过观察它们的克隆连接使其不受影响或与相邻的芽隔离。当克隆整合被切断时，处于“中等”和“高”埋葬情况下的活芽数量随时间减少。 15周后，收获核心。埋葬对结节梭菌的影响取决于克隆整合是维持还是切断。维持克隆整合后，枝条密度，叶片数，地上生物量和叶片长度不会随埋葬水平的变化而显着变化。当克隆整合被切断时，“环境”和“中度”埋藏条件下核心的枝条密度和叶片数量大于“高”埋葬水平，“环境”下地上生物量大于“中等”和“高”埋藏条件。 “高”埋葬水平，“环境”下的叶子长度比“高”埋葬下的核心长。地下生物量不受埋葬和克隆整合的影响。垂直根状茎的节间长度随埋葬而增加。当克隆整合被切断时，这种增加更大。总之，海藻结节藻的克隆整合的保存缓冲了海草对小规模埋葬事件的表现。

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    F. Tuya; F. Espino; J. Terrados;

  • 作者单位

    Centra en Biodiversidad y Gestion Ambiental, Marine Sciences Faculty, Universidad de Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain;

    Centra en Biodiversidad y Gestion Ambiental, Marine Sciences Faculty, Universidad de Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain;

    Institute Mediterraneo de Estudios Avanzados, IMEDEA (CSIC-UIB), C/ Miquel Marques, 21-07190 Esporles, Islas Baleares, Spain;

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  • 关键词

    canary islands; clonality; cymodocea nodosa; disturbance; seagrass; sedimentation;

    机译：加那利群岛;克隆性cymodocea nodosa;骚乱;海草沉降;

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