Filter-Feeding in Corbicula fluminea and Its Effect on Seston Removal

Lauritsen, Diane D.

doi:10.2307/1467704

Cited by 72 publications

(55 citation statements)

References 17 publications

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“…This drop in the clearance rate with low food levels stands in contrast to theory on the functional response of filter feeders, which predicts high rates at low food levels and decreasing rates with increasing food levels beyond a threshold level (incipient limiting level) in order to balance ingestion rate (e.g., Jeschke et al 2004). It has also been shown that food concentration and clearance rates were inversely related in C. fluminea (Lauritzen 1986). The drop in clearance rate found here can also not be explained by decreasing temperature during the end of summer (compare Viergutz et al 2007), because the temperatures at that time were similar to those recorded in May and June, during which high clearance rates were measured.…”

Section: Shell Length Increase Versus Body Mass Decrease During Starvmentioning

confidence: 96%

Strong body mass decrease of the invasive clam Corbicula fluminea during summer

et al. 2009

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The filter-feeding clam Corbicula fluminea has widely spread from its Asiatic origin into freshwater habitats on several continents, where it often has a considerable impact on ecosystem processes. The present study was stimulated by the observation that C. fluminea can experience mass mortality during warm summers, even when temperatures are still far below the lethal level. We hypothesized that starvation due to low food quantities during summer is a main factor in this context. In order to test nutritional conditions in an environment where summer mortality occurred, the clams' body mass was tracked in river bypass systems installed at the Lower River Rhine (Germany and The Netherlands). Two food levels were adjusted in the bypass channels: one corresponding to the original chlorophyll level in the river (ambient food) and one with a chlorophyll a level reduced by about 50% (low food). The clams kept at the ambient food level increased their shell length during summer, although growth rates decreased at low food levels in the River Rhine in late summer. In contrast to shell length, body mass decrease in late summer cumulated in 94% reduction from August until October. This trend was enhanced by the experimental food reduction, i.e., clams kept in the low food level treatments weighed 60% less than the clams in the ambient food treatment at the end of summer. However, mortality was low in both treatments. The data demonstrate a high plasticity in the body mass of C. fluminea. The corresponding possibility to respire body mass can be seen as one strategy to survive longer starvation periods.

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Section: Shell Length Increase Versus Body Mass Decrease During Starvmentioning

confidence: 96%

Strong body mass decrease of the invasive clam Corbicula fluminea during summer

et al. 2009

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“…Filtration by clams is often sporadic and varies in rates and timing of uptake between individuals (Lauritsen 1986). Evaluation of pH and clam shell effects and the characterization of viral titres within short time intervals suggest that the filtrating behaviour of the C. fluminea was likely the dominant process producing the titre reduction.…”

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confidence: 99%

Filter-feeding bivalves can remove avian influenza viruses from water and reduce infectivity

et al. 2009

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Avian influenza (AI) viruses are believed to be transmitted within wild aquatic bird populations through an indirect faecal -oral route involving contaminated water. This study examined the influence of filterfeeding bivalves, Corbicula fluminea, on the infectivity of AI virus in water. Clams were placed into individual flasks with distilled water inoculated 1 : 100 with a low pathogenic (LP) AI virus (A/Mallard/MN/190/99 (H3N8)). Viral titres in water with clams were significantly lower at 24 and 48 h post-inoculation compared to LPAI-infected water without clams. To determine whether clams affected the infectivity of AI viruses, 18 wood ducks (Aix sponsa) were divided into test groups and inoculated with a variety of treatments of clam supernatants, whole clams and water exposed to a high pathogenic (HP) AI (A/whooper swan/Mongolia/244/05 (H5N1)). None of the wood ducks inoculated with HPAI-infected water that was filtered by clams or that was inoculated with or fed tissue from these clams exhibited morbidity or mortality. All wood ducks exposed to either HPAI-infected water without clams or the original viral inoculum died. These results indicate that filter-feeding bivalves can remove and reduce the infectivity of AI viruses in water and demonstrate the need to examine biotic environmental factors that can influence AI virus transmission.

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“…Many stream organisms are adapted to feed on seston (e.g. Wallace and Merritt 1980;Lauritsen 1986), and transport of seston is an essential linkage along the continuum of stream ecosystems in a river system (Vannote et al 1980). Wotton (1984) suggested that two processes generate seston in streams: primary generation by breakdown of large particles, chiefly by insects (e.g.…”

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confidence: 99%

Experimental studies of physical factors affecting seston transport in streams1

Webster

Benfield

Golladay

et al. 1987

Limnology & Oceanography

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We conducted three series of experiments in laboratory and natural streams to evaluate effects of various physical factors on seston (particulate organic matter) retention, entrainment, and transport. Results of laboratory experiments showed that substrate characteristics were important in determining retention of all sizes of seston. Retention increased with roughness and substrate complexity. During simulated storms in laboratory streams, seston concentrations were not generally correlated with discharge. However, we found strong correlation between seston concentration and the rate of increase in discharge during rising hydrographs, and, after peak discharge, seston concentration dropped exponentially independent of discharge. Simulated storms conducted in a natural stream channel supported those findings. Results of these experiments and published field studies suggest that existing sediment transport models have little application to seston transport in small streams primarily because of limited availability of seston. During baseflow, seston transport depends on the rate of biological particle generation and retention characteristics of the streambed. Seston transport during storms depends on the rate of increase in discharge, streambed retention, and the availability of particulate organic material on the streambed.

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Filter-Feeding in Corbicula fluminea and Its Effect on Seston Removal

Cited by 72 publications

References 17 publications

Strong body mass decrease of the invasive clam Corbicula fluminea during summer

Strong body mass decrease of the invasive clam Corbicula fluminea during summer

Filter-feeding bivalves can remove avian influenza viruses from water and reduce infectivity

Experimental studies of physical factors affecting seston transport in streams1

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