Differential transport and preservation of the instars of Limnocythere inopinata (Crustacea, Ostracoda) in three large brackish lakes in northern China
Differential transport and preservation of the instars of Limnocythere inopinata (Crustacea, Ostracoda) in three large brackish lakes in northern China
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中国北方三大咸水湖泊湖水藻（甲壳类、介形类）龄期的差异运输与保存
DOI：
10.1007/s10750-014-2118-8
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发表时间：
2015-03
期刊：
影响因子：
2.6
通讯作者：
Zhai Dayou, Xiao Jule, Fan Jiawei, Wen Ruilin, Pa
中科院分区：
文献类型：
--
作者：
Zhai Dayou, Xiao Jule, Fan Jiawei, Wen Ruilin, Pa
为了更好地了解湖泊介形类的埋藏学，对岱海、大理和呼伦3个湖泊88个表层沉积物样品中的湖沼介形类（Limnocytherinopinata）的种群年龄结构、保存和甲壳丰度进行了研究。种群结构的空间变化。inopinata匹配内湖水力梯度，与年龄较大的优先沉积在沿岸的带，而年轻的年龄更丰富的更深的沃茨。我们建议，蜕皮和死亡的介形虫，特别是那些小的青少年，经历下坡运输。在湖泊中的运输量是由风驱动的流体动力学控制。介形虫壳在这些碱性湖泊中没有化学溶解，降解主要表现为物理破碎。保护L. inopinata与沉积速率和水力稳定性有关，不同湖泊之间保存的空间格局不同。沉积速率和水力条件的空间和季节变化以及介形虫的生命周期可能导致了这种复杂性。成虫和A-7甲壳是各龄中最常见的。我们认为，幼鱼甲壳的优先保存要么与死亡率高有关，要么与在沃茨中保存良好有关。
Population age structure, preservation, and carapace abundance of the valve remains of Limnocythere inopinata in 88 surface-sediment samples from Lakes Daihai, Dali, and Hulun were examined to better understand taphonomy of limnic ostracods. The spatial changes in population structure of L. inopinata match the within-lake hydraulic gradients, with the older instars preferentially deposited in the littoral zone while the younger instars being more abundant in deeper waters. We propose that molt and mortem remains of ostracods, especially those of the small juveniles, experience downslope transport. The magnitude of transport in a lake is controlled by wind-driven hydrodynamics. There is no chemical dissolution of ostracod valves in these alkaline lakes, and degradation is mainly represented by physical breakage. The preservation of L. inopinata is related to sedimentation rate and hydraulic stability, and the spatial pattern of preservation varies between lakes. Spatial and seasonal changes in sedimentation rate and hydraulic condition, and the ostracod life cycle may have contributed to this complexity. Adult and A-7 carapaces are the most frequent among the instars. We suggest that the preferential preservation of juvenile carapaces is either related to high mortality rate or to the good preservation in deep waters.
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影响因子：
2.6
作者：
Zhai, Dayou;Xiao, Jule;Zhou, Lang;Wen, Ruilin;Chang, Zhigang;Pang, Qiqing
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影响因子：
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作者：
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影响因子：
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作者：
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