...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Seasonal and interannual patterns of intertidal microphytobenthos in combination with laboratory and areal production estimates
【24h】

Seasonal and interannual patterns of intertidal microphytobenthos in combination with laboratory and areal production estimates

机译：潮间带微底栖动物的季节性和年际模式，结合实验室和区域产量估算

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

From April 1994 to December 1997, we studied the microphytobenthic assemblages in surface (0 to 0.5 cm) and subsurface (0.5 to 2 cm) sediments at spring low tide along a transect of 5 stations in an estuarine sandflat of the Seto Inland Sea, Japan. At the innermost sampling station, microphytobenthos biomass (chl a) was also investigated in a vertical profile to 10 cm depth from December 1994 to April 1996. The chl a contents at the 2 uppermost layers were well correlated with each other, with a mean decrease of 34 % from the surface to subsurface layer. Chl a tended to decrease rapidly through the vertical profile and was reduced to 3.2 +- 1.4 % SD in the 9 to 10 cm layer. There was a progressive decrease in the chl a content every year in fall and the occurrence of major peaks in early spring and/or summer. This was accompanied by a significant increase in microphytobenthos biomass from 1994 to 1995 and from 1995 to both 1996 and 1997. The microphytobenthos biomass in surface sediments (mean of 5 stations) ranged between 27.7 (October 1994) and 120 mg chl a m~2 (July 1997), or between 3.9 (November 1994) and 20.3 μg chl a g~(-1) dry wt (July 1996). Annual mean (1995 to 1997) biomass was 72.3 +-27.1 mg chl am~(-2) and 11.0 +-4.3 μg chl a g~(-1) dry wt. These values rank in the mid-upper range of microphytobenthic biomass for intertidal sediments. In addition to the field investigations, we conducted laboratory experiments on a dominant diatom species, Navicula sp. The photosynthetic rate of Navi-cula sp. was saturated at a light intensity of 165 μE m~(-2) s~(-1) at 21℃. No photoinibition was found at higher light intensities up to 400 μE m~(-2) s~(-1). The relationship between temperature and photosynthetic rate was positive and linear within a temperature range between 10 and 35℃ at 55 μE m~(-2) s~(-1). Areal 'potential' primary production of microphytobenthos was between 0.32 (December 1994) and 3.0 g C m~(-2) d~(-1) (July 1997), with an annual mean of 1.2 g C m~(-2) d~(-1). Uni- (summer) or bi-modal (spring and summer) peaks of microphytobenthos biomass and primary production highlighted a marked interannual variability. Marked seasonal patterns were also recognizable, with primary production of microphytobenthos significantly higher both in spring and summer than in winter and fall.
机译：从1994年4月到1997年12月，我们在日本濑户内海河口沙地上5个台站的春季低潮期研究了表层（0至0.5 cm）和表层（0.5至2 cm）沉积物中的微植物底栖动物组合。 1994年12月至1996年4月，在最内层的采样站，还对垂直至10厘米深度的底栖微生物底栖生物量进行了调查。最上两层的chl a含量相互关联良好，平均值下降从表层到表层的比例为34％。 Chla在整个垂直剖面中倾向于快速下降，并在9至10 cm的层中下降至3.2±1.4％SD。每年秋天的chl a含量逐年下降，早春和/或夏季出现主要峰值。从1994年到1995年以及从1995年到1996年和1997年，微底栖生物量显着增加。表层沉积物中微底栖生物量（5个站的平均值）介于27.7（1994年10月）和120 mg chl am〜2（ 1997年7月）或3.9（1994年11月）至20.3μgchl ag〜（-1）干重之间（1996年7月）。年平均生物量（1995年至1997年）为72.3 + -27.1 mg chl ag〜（-1）干重，为11.0 + -4.3μgchl a g〜（-1）干重。这些值位于潮间带沉积物的微底栖生物量的中上范围。除现场调查外，我们还对主要的硅藻物种Navicula sp。进行了实验室实验。 Navicula sp。的光合速率。在21℃下，光强为165μEm〜（-2）s〜（-1）时饱和。在高达400μEm〜（-2）s〜（-1）的更高光强度下未发现光致敏。在55μEm〜（-2）s〜（-1）下，温度与光合速率的关系在10至35℃之间呈正线性关系。微小底栖动物的潜在``潜在''初级生产量在0.32（1994年12月）和3.0 g C m〜（-2）d〜（-1）之间（1997年7月），年平均为1.2 g C m〜（-2） d〜（-1）。微小底栖动物生物量和初级生产的单峰（夏季）或双峰峰（春季和夏季）突出显示了明显的年际变化。明显的季节性模式也是可以识别的，春季和夏季的微底栖底栖动物的初级产量明显高于冬季和秋季。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号