BEHAVIOR AND ECOLOGICAL IMPORTANCE OF A MUD SNAIL (ILYANASSA-OBSOLETA) POPULATION IN A TEMPERATE MACROTIDAL ESTUARY
BEHAVIOR AND ECOLOGICAL IMPORTANCE OF A MUD SNAIL (ILYANASSA-OBSOLETA) POPULATION IN A TEMPERATE MACROTIDAL ESTUARY
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DOI：
10.1139/z88-065
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发表时间：
1988-02-01
影响因子：
1.4
通讯作者：
CRANFORD, PJ
中科院分区：
文献类型：
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作者：
CRANFORD, PJ
当Ilyanassa obsoleta种群出现在芬迪湾米纳斯盆地南部湾的潮间带时，在8个月内对它们进行了采样[加拿大]。泥螺最早出现在4月，产卵期在5月底和6月初。肉重在5月至11月期间增加，8月和9月期间的增长率最高。11月，种群返回潮下带，那里的能源储备在冬季得到部分利用。集群和差异栖息地的选择（盐行军或泥滩）内的大小类导致密度，常备库存，和生产的大空间变化。生产I。obsoleta平均为1.1 g C. m-2在他们停留在潮间带。底栖微藻的碳供应不足以满足这一群体的需求。来自米草的碎屑被认为是一个重要的额外碳源。Ilyanassa obsoleta不是该地区任何较知名的掠食者的主要猎物。它们对潮间带群落的重要性来自它们对沉积微生物过程和常驻底栖植物群和动物群的直接（捕食）和间接（竞争、干扰、营养再生和生物扰动）影响。
A population of Ilyanassa obsoleta was sampledduring the 8-month period when they are present in the intertidal zone in the Southern Bight of Minas Basin, Bay of Fundy [Canada]. Mud snails were first observed in April, and spawning took place in late May and early June. Flesh weight increased between May and November, with the highest growth rates recorded during August and September. During November the population returned to the subtidal zone, where energy reserves are partially utilized during winter. Clustering and differential habitat selection (salt march or mud flat) within size classes resulted in large spatial variations in density, standing stock, and production. Production by I. obsoleta averaged 1.1 g C .cntdot. m-2 during their stay in the intertidal zone. The supply of carbon from epibenthic microalgae is insufficient to meet the requirements of this population. Detritus derived from Spartina is believed to be an imporant additional source of carbon. Ilyanassa obsoleta is not a major prey item of any of the better known predators in this region. Their importance to the intertidal community results from the direct (predation) and indirect (competition, disturbance, nutrient regeneration, and bioturbation) influence of their presence on sedimentary microbial processes and the resident benthic flora and fauna.