Halimeda contribution to organic and inorganic production in a Tahitian reef system
Halimeda contribution to organic and inorganic production in a Tahitian reef system
复制标题
哈利梅达对大溪地珊瑚礁系统有机和无机生产的贡献
作者：
C. Payri
在一年的时间里，人们对栖息在莫雷阿岛泻湖中的七种仙掌藻进行了研究，其中三种占藻类覆盖面积的10%，平均干重为111克m-2。每两个月测量一次生物量，强调物种生活的季节性变化很小。报告的主要下降是H。十月份发生的一次结果事件后的仙人掌。初级生产进行了评估，在现场，定期超过一年，通过测量外壳中的氧气变化。无论是以比重或面积单位表示，最高的初级生产量记录为H。仙人掌生产和生物量在一年中同时变化。这三个物种总共产生约6 g Cm-2 y-1。沙栖H.厚壳湾在这一年中，通过在田间用茜素红-S对个体进行染色来跟踪卵圆。测量的平均速率为3.3节ind-1d-1和0.17 gdw d-1 m-2。这三个物种的碳酸盐预算的珊瑚礁的贡献估计在24小时周期的总碱度测量。H.仙人掌具有最高的CaCO 3产量。对于研究的三个物种，碳酸钙生产的1.4公斤m-2 y-1，这可能对应于0.4毫米/年的研究礁系统的增生，估计。
Of the seven species of Halimeda inhabiting a lagoon on Moorea island, three representing 10% of the algal covering and averaging 111 g of dry weight m-2, have been studied in the course of a year. The biomass, measured bimonthly, stresses a slight seasonal variability in the species life. The main decrease was reported for H. opuntia after a fruiting event, which happened in October. The primary production was assessed, in situ, periodically over a year, by measuring oxygen variations in enclosures. Either expressed on specific-weight basis or in area units, the highest primary productions were recorded for H. opuntia. Productions and biomasses vary simultaneously during the year. The three species produce all together about 6 g C m-2y-1. The growth rate of the sand-dwelling H. incrassata f. ovata was followed during the year by staining, in the field, individuals with alizarin Red-S. The average rates measured were 3.3 segments ind-1d-1 and 0.17 gdw d-1m-2. The contribution of the three species to the carbonate budget of the reef was estimated by total alkalinity measurements during 24-h cycles. H. opuntia had the highest CaCO3 production. For the three species studied, CaCO3 production of 1.4 kg m-2y-1, which could correspond to a 0.4mm/year accretion of the studied reefal system, was estimated.