IMPACT OF IRRIGATION ON OXYGEN FLUX INTO THE SEDIMENT - INTERMITTENT PUMPING BY CALLIANASSA-SUBTERRANEA AND PISTON-PUMPING BY LANICE-CONCHILEGA
IMPACT OF IRRIGATION ON OXYGEN FLUX INTO THE SEDIMENT - INTERMITTENT PUMPING BY CALLIANASSA-SUBTERRANEA AND PISTON-PUMPING BY LANICE-CONCHILEGA
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DOI：
10.1007/bf00353625
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发表时间：
1995-08-01
期刊：
影响因子：
2.4
通讯作者：
GRAF, G
中科院分区：
文献类型：
--
作者：
FORSTER, S;GRAF, G
1989年和1990年在北海黑尔戈兰岛附近采集样品，研究了两种大型底栖动物Callianassa subdumeea（十足目）和Lanice conchilega（多毛类）的泵入行为对沉积物中O-2-通量的影响。发现这两种物种向沉积物中输送的氧气量大致相似（3 mmol m（-2）d（-1）），尽管它们表现出明显不同的泵送行为。灌溉C。呼吸暂停是间歇性的，其特征在于持续2.6分钟的规则重复的呼吸电流，并被40分钟的暂停所间隔。除了这种定期的间歇性冲洗外，还观察到一种不规则模式。C.亚潜孔虫构建了复杂的洞穴系统。然而，至少有一半的洞穴壁不与含氧水接触，因此作为O-2交换的额外界面是无效的。从洞穴排出的沉积物增加了总摄氧量（TOU）相对于周围的沉积物表面。L. conchilega比C.亚基我们建议L. conchilega在其管道中移动时充当活塞，将洞穴水与上覆水交换。这种机制，被称为“活塞泵”，也是潜在的重要在其他较小的管居住的生物。在北海南部的一个浅水站，C。潜孔虫每m2构筑1.6m2洞穴面。L. conchilega（300 ind m（-2））仅产生0.37 m（2）m（-2）管表面。的丰度和氧运输与泵送活动的基础上，据计算，这两个物种增加TOU的85%相比，O-2-通量通过沉积物-水界面。
O-2-flux into sediments attributed to the pumping behaviour of two macrofauna species, Callianassa subterranea (Decapoda) and Lanice conchilega (Polychaeta) was investigated, Samples were obtained from the North Sea near Helgoland in 1989 and 1990. The two species were found to transport roughly similar amounts (3 mmol m(-2) d(-1)) of oxygen into the sediment although they displayed markedly different pumping behaviours. Irrigation by C. subterranea was intermittent and characterized by regularly recurring breathing currents which lasted 2.6 min and were separated by 40-min pauses. In addition to this regular intermittent irrigation, an irregular mode was observed. C. subterranea constructed a complex burrow system. At least half of the burrow wall was not in contact with oxygenated water, however, and thus not effective as additional interface for O-2-exchange. Sediment expelled from the burrow increased the total oxygen uptake (TOU) relative to the surrounding sediment surface. L. conchilega moved water much more frequently (every 4 min) than C. subterranea. We suggest that L. conchilega acted as a piston when moving in its tube, exchanging burrow water with the overlying water. This mechanism, termed 'piston-pumping', is also potentially important in other smaller tube dwelling organisms. At a shallow water station in the southern North Sea 21 ind of C. subterranea constructed 1.6 m(2) burrow surface per m(2). L. conchilega (300 ind m(-2)) created only 0.37 m(2) m(-2) tube surface. On the basis of the abundance and oxygen transport associated with pumping activity, it is calculated that the two species increase TOU by 85% compared to O-2-flux across the sediment-water interface.