Eelgrass seed harvesting: Flowering shoots development and restoration on the Swedish west coast
Eelgrass seed harvesting: Flowering shoots development and restoration on the Swedish west coast
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DOI：
10.1016/j.aquabot.2017.10.002
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发表时间：
2018-01-01
期刊：
影响因子：
1.8
通讯作者：
Moksnes, Per-Olav
中科院分区：
文献类型：
--
作者：
Infantes, Eduardo;Moksnes, Per-Olav
在2012年和2013年期间，沿着沿着深度梯度在三个地点对鳗草（大叶藻）开花发育和种子生产进行了评估，以1）描述瑞典西海岸的开花季节性，2）评估使用种子进行大规模恢复的方法，包括使用垂直水槽收获、储存和分离可行的种子。在6 ~ 10月田间均发现了鳗草开花的枝条，在7 ~ 8月达到最高密度（平均3.8 ~ 0.5枝m ~（-2））。开花枝条密度随深度下降，而芽长，佛焰苞数，种子/芽和种子大小随深度增加，从而在最高的种子产量在中间深度（2米），在大多数海湾和年。由于开花枝条密度低，瑞典的种子产量（平均39-126粒种子m（-2），7月至9月）比其他研究地区低一个数量级。结果表明，种子产量在草地和年份之间的差异为2.5-3.4倍，主要是由每枝种子产量的变化驱动的。生长季节的温度只能部分解释这种变化，这表明其他因素，如光线和丝状藻垫的数量也可能在花的发育中很重要。结果表明，当> 50%的佛焰苞有发育中的种子时，应收获开花的嫩枝，嫩枝在罐中储存不应超过40天，以获得有活力的种子的最佳释放。还提出了一种新的机械化方法，使用垂直水槽从收获物中分离出大量有活力的种子。
Eelgrass (Zostera marina) flowering development and seed production were assessed along a depth gradient at three sites during 2012 and 2013 to 1) describe the flowering seasonality in the Swedish west coast, and 2) evaluate methods using seeds for large-scale restoration, including harvesting, storage and separation of viable seeds using a vertical flume. Eelgrass flowering shoots were found in the field from June to October, reaching the highest densities in July and August (average 3.8 0.5 shoots m(-2)). Flowering shoot densities decreased with depth, whereas shoot length, number of spathes, seeds/shoot and seed size increased with depth, resulting in the highest seed production at intermediate depths (2 m) in most bays and years. Because of low densities of flowering shoots, seed production in Sweden (on average 39-126 seeds m(-2), Jul-Sep) was an order of magnitude lower than in other studied areas. Results showed that seed production differed 2.5-3.4 times between meadows and years, mainly driven by variation in seed production per shoot. This variation was only partly explained by temperature over the growing season, suggesting that other factors such as light and the amount of filamentous algal mats might also be important in flower development. Results suggest that flowering shoots should be harvested when > 50% of the spathes have developing seeds, and that shoots should not be stored longer than 40 days in tanks to obtain an optimal release of viable seeds. A new mechanized method using a vertical flume to separate large amounts of viable seeds from the harvest is also presented.