Transplantation of Eelgrass (zostera Marina L.) in Huiquan bay Using Rhizomes Bound to a Small Elongate Stone With Biodegradable Cotton Thread

27 Mar Transplantation of Eelgrass (zostera Marina L.) in Huiquan bay Using Rhizomes Bound to a Small Elongate Stone With Biodegradable Cotton Thread

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Abstract

于 2009 年和 2010 年在青岛汇泉湾用根茎棉线绑石法进行大叶藻(Zostera marina L.)移植, 并于 2012 年 4 月 20 日至 11 月 19 日对移植大叶藻的生长情况进行观察(包括形态学变化、密度、茎枝高度、 地上生物量、底质粒径几个方面)。观察期间水温为 7.8~26.1℃。结果显示, 移植底质可定性为粉砂质; 移植大叶藻的有性繁殖期为 2012 年 4~8 月; 无性繁殖在秋季达到高峰; 密度在 6 月和 9 月分别高 达 411 茎枝m2 和 481 茎枝m2; 高度与地上生物量的最大值出现在 6~7 月份。 与 2009 年青岛湾天然大 叶藻进行比较后可以发现, 移植大叶藻的高度、地上生物量及其季节变化与天然大叶藻基本保持一致, 说明移植大叶藻的生长状况良好, 同时说明根茎棉线绑石法是一种高效且实用的海草床生态恢复方法。

English Abstract

The eelgrass (Zostera marina L.) was transplanted with a new simple method in Huiquan Bay, Qingdao,
i.e several rooted shoots tied on a small elongate stone with cotton thread were planted in 2009 and 2010. From
April 20 to November 19, 2012, the morphology, shoot density, shoot height, aboveground biomass and particle-size
of sediment of the transplanted eelgrass were observed. The water temperature ranged from 7.8 to 26.1℃ during
the observation. The results showed that the sexual reproduction of eelgrass occurred from April to August, and that
the asexual reproduction occurred frequently in autumn. The mean shoot density ranged from 240 to 481 shootsm2,
with relative higher values of 411 shootsm2 and 481 shootsm2 in June and September, respectively. The highest
values of shoot height and aboveground biomass occurred in June to July. The sediment was characterized by silt.
The values and variations of shoot height and aboveground biomass were similar with those of natural eelgrass in
Qingdao Bay, observed in 2009. We conclude that the transplanted eelgrass grew well, suggesting that the new
method was effective and practical.