THE SPATIAL-DISTRIBUTION AND ECOLOGY OF ZOOCHLORELLAE-BEARING CILIATES IN A PRODUCTIVE POND
THE SPATIAL-DISTRIBUTION AND ECOLOGY OF ZOOCHLORELLAE-BEARING CILIATES IN A PRODUCTIVE POND
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DOI：
10.1111/j.1550-7408.1986.tb05662.x
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发表时间：
1986-11-01
期刊：
影响因子：
--
通讯作者：
CANTER, HM
中科院分区：
文献类型：
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作者：
BERNINGER, UG;FINLAY, BJ;CANTER, HM
本文报道了5种携带虫囊菌的纤毛虫（Daidaleos游仆虫，Frontonia vernalis，Acaryophrya sp.在生产性淡水池塘中调查了三种主要的淡水鱼类（即双线口线虫（Disematostoma butschlii）和春性斯托克草（Stokesia vernalis））。所有物种的垂直剖面进行了比较，O2，CO2，光，温度，溶解无机氮的水平，和颗粒食物来源的可用性。在分层的水柱，Stokesia仍然接近水面：所有其他物种达到峰值丰度接近oxicanoxic边界。后一种行为可能适应了纤毛虫对有氧呼吸和颗粒食物的需求，以及它们对来自相反方向的光和溶解营养物的基本资源的依赖。随着分层的崩溃，游仆虫和Frontonia返回到沉积物中，他们恢复到异养营养，但他们保留了一些zoochlorellae。Acaryophrya和Disematostoma也变成了异养的，但它们仍然均匀地分布在水柱中，并且它们失去了它们的zoochlorellae。Stokesia消失了，大概是因为它被包囊住了。有一些证据表明，垂直空间分离的五个物种在水柱。
The spatial distributions of five zoochlorellae-bearing ciliae species (Euplotes daidaleos, Frontonia vernalis, Acaryophrya sp., Disematostoma butschlii, and Stokesia vernalis) were investigated in a productive freshwater pond. The vertical profiles of all species were compared to the levels of O2, CO2, light, temperature, dissolved inorganic nitrogen, and the availability of particulate food sources. In the stratified water column, Stokesia remained close to the water surface: all other species reached peak abundance close to the oxicanoxic boundary. The latter behavior probably accommodated the ciliates'' requirements for aerobic respiration and particulate food and their dependance on the essential resources of light and dissolved nutrients, which came from opposite directions. With the collapse of stratification, Euplotes and Frontonia returned to the sediment where they reverted to a heterotrophic nutrition although they retained some zoochlorellae. Acaryophrya and Disematostoma also became heterotrophic, but they remained evenly distributed in the water column and they lost their zoochlorellae. Stokesia disappeared, presumably because it encysted. There was some evidence for vertical spatial separation of the five species in the water column.