Effects of Oxygen, Sulfide, and Organic Carbon on a Head- Down Deposit Feeder

本研究的主要目的是确定来自水体上覆的氧气、微生物产生的硫化物和沉积的有机碳对生活在底栖动物中的海洋无脊椎动物的食物来源、生长和代谢途径的相互作用。研究人员将确定控制氧气和有机碳获取的因素，然后验证以下假设：(1)生长更多地由氧气、硫化物和有机碳之间的相互作用而不是任何一个因素控制，(2)生长不需要硫化物，异母鱼从深层沉积物中吸收的有机物比从表层沉积物中吸收的有机物多，并且(3)夹尾增加了通风。我们还将确定是否共生硫化物氧化发生在沉积物喂养多毛类。初步研究氧和硫化物对血红素蛋白、细胞色素和血红蛋白代谢产热和状态的影响。

The major goal of this investigation is to determine the interactive effects of oxygen from overlaying water, microbially produced sulfide and sedimentary organic carbon on food sources, growth, and metabolic pathways in marine invertebrates living in the benthos. The investigators will determine the factors controlling acquisition of oxygen and organic carbon, and then test the hypotheses that (1) growth is controlled more by the interactions between oxygen, sulfide and organic carbon rather than any one factor, (2) that sulfide is not required for growth, that Heteromastus will absorb more organic matter from deep sediment than from surface sediment, and that (3) tail-nipping increases ventilation. We will also determine whether symbiotic sulfide oxidation occurs in a deposit feeding polychaete. Preliminary investigations will be made on the effects of oxygen and sulfide on metabolic heat production and state of the heme protein, cytochromes and hemoglobin.