Temporal dynamics of subtidal Zostera marina and intertidal Zostera japonica on the southern coast of Korea
Temporal dynamics of subtidal Zostera marina and intertidal Zostera japonica on the southern coast of Korea
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DOI：
10.1111/j.1439-0485.2006.00089.x
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发表时间：
2006-06-01
影响因子：
1.1
通讯作者：
Lee, Sung Mi
中科院分区：
文献类型：
--
作者：
Lee, Sang Yong;Kim, Jeong Bae;Lee, Sung Mi
每月在韩国南部海岸巨济岛达大湾监测两种海草物种（大叶藻和大叶藻）的时间动态。 2001年7月至2002年7月对植物形态特征、枝条密度、生物量、叶片产量、繁殖力和环境特征进行了监测。大叶藻出现在潮间带，大叶藻出现在潮下带，平均低水位以下0.5至2.5 m。 Z. marina 的芽和根茎显着大于 Z. japonica，而 Z. japonica 的芽密度大于 Z. marina。尽管形态和枝条密度存在差异，但物种之间的生物量没有显着差异。 Z. marina 的繁殖发生在四月至六月，Z. japonica 的繁殖发生在五月至七月。 Z. marina 的繁殖芽比例大约是 Z. japonica 的三倍。粳稻生物量的季节变化是由枝条大小和密度的变化引起的，而紫菜生物量的季节变化主要是由枝条长度的变化引起的。 Z. marina 和 Z. japonica 的叶片产量表现出明显的季节变化，Z. marina 的叶片产量 (2.6 +/- 0.2 g DW.m(-2).day(-1)) 高于 Z. japonica (1.7 +/- 0.2 g DW.m(-2).day(-1))。两个物种之间的平均叶期间隔没有显着差异，而Z. marina 的叶子寿命（69 +/- 7.8 天）比Z. japonica 的（59 +/- 8.3 天）更长。我们的结果表明，Z. japonica 的季节性叶子生长模式与辐照度和温度相关，而 Z. marina 的叶子对辐照度的反应最大。辐照度的季节性变化似乎控制了这两个物种地上生物量的时间变化。
The temporal dynamics of two seagrass species, Zostera marina and Z. japonica, were monitored monthly in Dadae Bay, Geoje Island, on the southern coast of Korea. Plant morphological characteristics, shoot density, biomass, leaf production, reproductive effort, and environmental characteristics were monitored from July 2001 to July 2002. Zostera japonica occurred in the intertidal zone and Z. marina occurred in the subtidal zone from 0.5 to 2.5 m below the mean low water level. Shoots and rhizomes were significantly larger in Z. marina than in Z. japonica, whereas the shoot density was greater in Z. japonica than in Z. marina. Despite differences in morphology and shoot density, biomass did not differ significantly between the species. Reproduction occurred from April to June in Z. marina and from May to July in Z. japonica. The proportion of reproductive shoots was approximately three times higher in Z. marina than in Z. japonica. Seasonal variation in the biomass of Z. japonica was caused by changes in both shoot size and density, whereas that of Z. marina was mainly caused by changes in shoot length. Leaf production in Z. marina and Z. japonica showed clear seasonal variation, and leaf production in Z. marina (2.6 +/- 0.2 g DW.m(-2).day(-1)) was higher than that in Z. japonica (1.7 +/- 0.2 g DW.m(-2).day(-1)). The mean plastochrone interval was not significantly different between the two species, whereas the leaf lifetime of Z. marina was longer (69 +/- 7.8 days) than that of Z. japonica (59 +/- 8.3 days). Our results indicated that seasonal leaf growth patterns in Z. japonica are correlated with irradiance and temperature, whereas those in Z. marina respond most to irradiance. Seasonal changes in irradiance appeared to control the temporal variation in above-ground biomass in both species.