Spilmont N, Davoult D, Migné A
UMR CNRS 8013 ELICO, Maison de la Recherche en Environnement Naturel, Université du Littoral Côte d'Opale, 62930 Wimereux, France.
Mar Pollut Bull. 2006;53(1-4):49-55. doi: 10.1016/j.marpolbul.2005.09.016. Epub 2005 Nov 17.
A two year survey of benthic primary production during periods of emersion was performed on two stations of an intertidal mudflat (a muddy-sand station and a muddy station) in the Seine Estuary (English Channel, France). The goals of this study were to investigate the seasonal variations of metabolism, to estimate daily potential primary production variation at the annual scale and to estimate the annual potential primary production of the mudflat. Primary production and respiration were estimated by in situ measurements of carbon dioxide fluxes. Chlorophyll a concentration exhibited a great variability on both locations. Gross community production ranged from ca. 0 to 77 mg C m(-2) h(-1) at the muddy-sand location and from ca. 0 to 122 mg C m(-2) h(-1) at the muddy location. Community respiration showed a seasonal trend following temperature variations (up to 28.51 mg C m(-2) h(-1) in the muddy-sand and up to 23.40 mg C m(-2) h(-1) in the mud). Daily potential primary production was calculated, according to seasonal variations of photosynthetic parameters calculated using three photosynthesis versus irradiance curves obtained for the muddy location. The annual gross community primary production was 135 g C m(-2) yr(-1), leading to a low autotrophic annual budget, considering an annual community respiration of 110 g C m(-2) yr(-1).
在法国英吉利海峡塞纳河口的一个潮间带泥滩的两个站点（一个泥砂质站点和一个泥质站点）进行了为期两年的潮间期底栖初级生产调查。本研究的目的是调查代谢的季节变化，估计年度尺度上每日潜在初级生产变化，并估算泥滩的年度潜在初级生产。通过原位测量二氧化碳通量来估算初级生产和呼吸作用。两个地点的叶绿素a浓度均表现出很大的变异性。泥砂质地点的群落总生产量在约0至77毫克碳·平方米⁻²·小时⁻¹之间，泥质地点在约0至122毫克碳·平方米⁻²·小时⁻¹之间。群落呼吸呈现出随温度变化的季节性趋势（泥砂质中高达28.51毫克碳·平方米⁻²·小时⁻¹，泥质中高达23.40毫克碳·平方米⁻²·小时⁻¹）。根据泥质地点获得的三条光合作用与辐照度曲线计算出的光合参数的季节变化，计算了每日潜在初级生产。考虑到年度群落呼吸为110克碳·平方米⁻²·年⁻¹，年度群落总初级生产为135克碳·平方米⁻²·年⁻¹，导致自养年度预算较低。
