The Japanese mud snail Batillaria attramentaria, a common gastropod in northeastern Asia, often predominates in isolated or degraded intertidal flat ecosystems in Japan and in other countries where it has invaded as an alien species. To evaluate the effects of B. attramentaria on carbon flow in intertidal flat ecosystems, we estimated the annual respiration of B. attramentaria from field surveys and laboratory experiments. The densities of the snails, as determined at an intertidal flat of the Seto Inland Sea, western Japan, were 235–485 individuals m⁻². Temperature and snail size strongly affected their respiration rates, as determined by measuring their CO₂ emission rates using an open-flow infrared gas analyzer method. The respiration rates were higher in the submerged condition than in the air-exposed condition. Based on the size structure of the natural population, laboratory experiment results, and environmental factors in the field (temperature and duration of the ebb/flood tide), we estimated the respiration in spring, summer, and autumn, respectively, as 1.9, 2.4, and 4.0 g C m⁻². The total amount of carbon mineralized annually by the respiration of B. attramentaria exceeds 10% of that mineralized through sediment respiration. Based on these data and respiration/ingestion ratios in previous reports, we conclude that B. attramentaria has a significant impact on the carbon flows in intertidal flat ecosystems.

中文翻译：

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潮间带日本泥螺Batillaria attramentaria的年度呼吸：对生态系统碳流量的影响

日本泥螺Batillaria attramentaria是东北亚的一种常见腹足纲动物，在日本和其他已作为外来物种入侵的国家中，通常以孤立或退化的潮间带平坦生态系统为主导。为了评估潮间带生态系统中炭黑僵菌对碳流量的影响，我们通过实地调查和实验室实验估计了炭黑僵菌的年度呼吸。在日本西部濑户内海的潮间带确定的蜗牛密度为235-485个体m ^-2。温度和蜗牛大小严重影响了它们的呼吸速率，这是通过测量它们的CO ₂来确定的排放率采用开放式红外气体分析仪方法。淹没条件下的呼吸速率高于空气暴露条件下的呼吸速率。根据自然种群的大小结构，实验室实验结果和现场环境因素（潮汐/潮汐的温度和持续时间），我们估计春季，夏季和秋季的呼吸分别为1.9、2.4和4.0 g C m ^-2。每年由于背叶双歧杆菌的呼吸而矿化的碳总量超过通过沉积物呼吸而矿化的碳的10％。根据以前的报告中的这些数据和呼吸/摄取比，我们得出结论：B. attramentaria 对潮间带平坦生态系统中的碳流量有重大影响。