The clearance of organic suspended particles by bivalve mollusks in estuarine ecosystems has been considered a critical regulating service. In Neotropical estuaries and associated mangrove ecosystems, the mangrove oyster, Crassostrea rhizophorae, is a key species in such process. To evaluate C. rhizophorae clearance rates (CR_bd), biodeposit experiments were carried out at dry (2015) and wet (2016) seasons, in three sites of the Vitória Bay Estuarine System (VBES), southeastern Brazil. The average CR_bd was 0.67 L.g⁻¹.h⁻¹, which can be regarded as low CR. Although organic fraction predominates in the particulate matter (>60%), high estuarine salinity caused by low river discharge during prolonged regional drought, impaired oyster feeder rates. When the CR_bd take into account the estimate entire mangrove oyster biomass at the VBES (3.77 × 10⁵ kg.km⁻²) it yields a rate of 6.51 × 10⁶ m³.kg⁻¹.day⁻¹, corresponding to a mean daily capacity of organic seston removal of 26% of the total estuarine volume. Even conservative, this result highlights the importance of mangrove oyster for the estuarine regulation, emphasizing its ecological importance and the need to sustain the critical ecosystem services of regulating estuarine environmental quality.

河口生态系统中双壳类软体动物清除有机悬浮颗粒被认为是至关重要的调节服务。在新热带河口和相关的红树林生态系统中，红树林牡蛎Crassostrea rhizophorae是这种过程中的关键物种。为了评估C. rhizophorae清除率（CR _BD），biodeposit实验是在干（2015）和湿（2016）的季节进行，在维多利亚湾河口系统（VBES），巴西东南部的三个站点。平均CR _bd为0.67 Lg ^-1 .h ^-1，这可以视为低CR。尽管有机质占颗粒物的比例最高（> 60％），但由于长期干旱导致河道水位低，导致河口盐度高，牡蛎饲养率降低。当CR _BD考虑到估计整个红树牡蛎生物量的VBES（3.77×10 ⁵ kg.km ^-2）它产生的6.51的速率×10 ⁶米³ .kg ^-1 ·天^-1，相当于每天河口有机物清除总量的26％。即使保守，这一结果也突出了红树林牡蛎对河口调节的重要性，强调了其生态重要性以及维持调节河口环境质量的关键生态系统服务的必要性。