Lopez Glenn R, Levinton Jeffrey S
Biologisk Institut, Odense Universitet, Niels Bohr Allé, DK-5000, Odense, Denmark.
Department of Ecology and Evolution, State University of New York, 11794, Stony Brook, NY, USA.
Oecologia. 1978 Jan;32(3):263-275. doi: 10.1007/BF00345106.
The deposit-feeding prosobranch Hydrobia ventrosa Montagu feeds most rapidly upon sediment particles that pass through a 10 μm sieve. Ingestion rate decreases with particles 80-125 μm, then increases with larger particles, which are fed upon by scraping fine material from their surfaces. Hydrobia is capable of digesting diatoms and bacteria from sediment particles, but with generally lower efficiencies than reported when fed pure cultures. Digestion of microorganisms appears to be constrained by ability of the snail to detach cells from sediment particles; only those cells detached from sediment seem to be available for digestion. In contrast, the amphipod Corophium volutator is capable of utilizing most of the diatoms not digested by Hydrobia. For a given sediment, a constant number of microorganisms appear to be safe from digestion by H. ventrosa, and bacteria and microalgae over this amount constitutes the available food.
植食性前鳃亚纲软体动物腹足滨螺（Hydrobia ventrosa Montagu）对通过10μm筛网的沉积物颗粒摄食速度最快。摄食率随颗粒大小为80 - 125μm而降低，然后随更大颗粒而增加，这些更大颗粒是通过刮擦其表面的细物质来摄食的。腹足滨螺能够消化沉积物颗粒中的硅藻和细菌，但总体效率通常低于投喂纯培养物时所报道的效率。微生物的消化似乎受到蜗牛从沉积物颗粒上分离细胞能力的限制；只有那些从沉积物中分离出来的细胞似乎可供消化。相比之下，双壳纲甲壳动物卷钩虾（Corophium volutator）能够利用腹足滨螺未消化的大部分硅藻。对于给定的沉积物，似乎有一定数量的微生物对腹足滨螺的消化具有抗性，超过这个数量的细菌和微藻构成了可利用的食物。
