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首页> 外文期刊>Marine ecology >Temporal dynamics of subtidal Zostera marina and intertidal Zostera japonica on the southern coast of Korea
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Temporal dynamics of subtidal Zostera marina and intertidal Zostera japonica on the southern coast of Korea

机译：韩国南部海岸潮下带虫的滨海藻类和潮间带虫带的时空动态

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摘要

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.
机译：在韩国南部海岸的巨济岛达达湾，每月监测两种海草种类的时空动态，即Zostera marina和Z. japonica。从2001年7月至2002年7月，监测了植物的形态特征，枝条密度，生物量，叶片产量，繁殖力和环境特征。潮间带下方有Zostera japonica，潮间带以下有Z. marina在0.5至2.5 m以下。平均水位低。 Z. marina的枝条和根茎显着大于Z. japonica，而Z. japonica的枝条密度大于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。繁殖发生在四月至六月的Z. marina和五月至七月的z。japonica。滨海鲈鱼中生殖芽的比例大约是粳稻中的三倍。粳稻生物量的季节性变化是由芽长和密度的变化引起的，而滨海枣的生物量主要是由芽长的变化引起的。 Z. marina和Z. japonica的叶片产量表现出明显的季节变化，而Z. marina的叶片产量（2.6±0.2 g DW·m〜（-2）·day〜（-1））高于Z。粳（1.7±0.2 g DW·m〜（-2）·天〜（-1））。两种植物之间的平均质体增距间隔没有显着差异，而滨海假单胞菌的叶片寿命更长（69±7.8天），比粳稻（59±8.3天）更长。我们的结果表明，Z。japonica的季节性叶片生长方式与辐照度和温度相关，而Z. marina的季节性叶片生长方式对辐照度的响应最大。辐照度的季节性变化似乎可以控制两个物种的地上生物量的时间变化。

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