THE FOOD OF ARTICULATE BRACHIOPODS
THE FOOD OF ARTICULATE BRACHIOPODS
复制标题
关节腕足动物的食物
DOI：
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发表时间：
1969
期刊：
影响因子：
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通讯作者：
H. Mccammon
中科院分区：
文献类型：
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作者：
H. Mccammon
胃内容物的分析，摄食行为的实验室观察，消化系统的解剖和腕足动物的现今地理分布提供了证据表明，溶解和胶体有机营养物质是有节腕足动物的主要食物，浮游生物只占一小部分。有关节的腕足动物在海洋环境中并不像其他滤食性动物那样常见，但在有机营养物浓度高的极地和亚极地地区，其数量可与古生代的化石沉积相媲美。有人认为，在地质历史上，当营养丰富的地区消失时，腕足动物就会减少，这要么是因为洋流的重大变化，到达海洋的营养物质急剧减少，要么是营养物质的化学或物理成分发生变化。
Analysis of stomach contents, laboratory observations of feeding behavior, the anatomy of the digestive system, and present-day geographic distribution of brachiopods furnish evidence indicating that dissolved and colloidal organic nutrients are the primary foods of articulate brachiopods, with plankton accounting for only a minor portion. Articulate brachiopods are not as common in the marine environment as other filter feeders, but in polar and subpolar areas where organic nutrients occur in high concentrations, populations rival fossil deposits in the Paleozoic. It is felt that in geologic history brachiopods declined when the nutrient-rich areas disappeared, either because of major shifts in oceanic currents, drastic decrease of nutrients reaching the ocean, or change in chemical or physical composition of the nutrients.