The filtration and feeding physiology of the infaunal estuarine bivalve Solen cylindraceus Hanley 1843

Villiers, C.J. de; Hodgson, Alan N.

doi:10.1016/0022-0981(93)90188-t

Cited by 13 publications

(12 citation statements)

References 45 publications

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“…The seston is a complex mixture which includes phytoplankton, detritus, bacteria and inorganic particles, and which varies considerably in size distribution and nutritional quality (Riley, 1970;Mayzaud et al, 1984). The organic fraction of the seston represents an important food resource for suspension-feeding primary consumers, such as zooplankton (Jerling and Wooldridge, 1995a), as well as components of the zoobenthos (de Villiers and Hodgson, 1993).…”

Section: Sestonmentioning

confidence: 99%

“…Hill, 1971;McLachlan and Erasmus, 1974;McLachlan and Grindley, 1974) have documented the physiological and behavioural responses of macrobenthic invertebrates to changing environmental conditions. Studies by de Villiers and and de Villiers and Hodgson (1993) have documented some physiological and behavioural responses of the infaunal bivalve Solen cylindraceus to both salinity and the concentration of suspended material in the water column. These authors argue that the success of this species in the Kariega Estuary is a consequence of prolonged periods of stable salinities, and tidally-mediated resuspension of detrital and epiphytic material.…”

Section: Zoobenthosmentioning

confidence: 99%

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The response of two South African east coast estuaries to altered river flow regimes

Grange

Whitfield²,

Villiers

et al. 2000

Aquatic Conserv: Mar. Freshw. Ecosyst.

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1. Major reductions in catchment run-off, a result of frequent and prolonged drought conditions, together with extensive impoundment of rivers and streams, has led to concern about the possible negative effects on downstream estuaries. Preliminary studies have shown that changes in river flow and associated nutrient inputs have had a predominantly negative impact on the aquatic biota of Eastern Cape estuaries. Natural successions now have human imposed trajectories which are reducing variability and forcing both freshwater 'deprived' and freshwater 'enriched' systems into artificial cycles.2. The Kariega and Great Fish estuaries in the Eastern Cape Province are used in a comparative manner to illustrate how differences in riverine inflow can influence the structure and functioning of selected biotic components in permanently open systems. Maximum chlorophyll a values in the freshwater deprived Kariega Estuary were 1 mg L − 1 , whereas maximum values in the freshwater enriched Great Fish Estuary were 22 mg L − 1 . Mean zooplankton biomass in the lower, middle and upper reaches of the Kariega Estuary was always below 50 mg m − 3 , whereas in the same reaches of the Great Fish Estuary, these values ranged from 256 to 4253 mg m − 3 . Similarly, mean ichthyonekton densities in the mouth region of the Kariega Estuary were 49 individuals per 100 m 2 compared with 279 per 100 m 2 in the Great Fish Estuary.3. Temporal changes of riverine flow reinforce the importance of allochthonous inputs to the functioning of Eastern Cape estuaries. A comparison between a dry and wet period in the Kariega Estuary revealed mean nitrate and phosphate concentrations increasing from 5 to 101 mmol L − 1 and from 1 to 5 mmol L − 1 , respectively. Phytoplankton stocks responded positively to freshettes in both the Kariega and Great Fish estuaries. Similarly, peaks in zooplankton biomass in the Great Fish Estuary increased rapidly in response to high food resource availability resulting from elevated river discharge. The higher ichthyoplankton and ichthyonekton densities in the Great Fish Estuary, when compared with the Kariega Estuary, were attributed to a combination of stronger olfactory cues for larval immigrants from the sea and elevated food stocks in the former system.

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Section: Sestonmentioning

confidence: 99%

Section: Zoobenthosmentioning

confidence: 99%

The response of two South African east coast estuaries to altered river flow regimes

Grange

Whitfield²,

Villiers

et al. 2000

Aquatic Conserv: Mar. Freshw. Ecosyst.

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“…Therefore, many studies on feeding physiology were performed using food sources that closely resembled natural particle composition, such as mixtures of sediment particles and phytoplankton (Kiorboe et al, 1981;Bricelj & Malouf, 1984;Bayne et al, 1987Bayne et al, ,1989Iglesias et al, 1992), detrital particles of plant origin derived from vascular plants and macroalgae (Stuart, 1982;Lucas & Newell, 1984;Newell & Langdon, 1986;Cranford & Grant, 1990) or, even, concentrated natural seston obtained by filtration of natural sea-water (de Villiers & Hodgson, 1993). Therefore, many studies on feeding physiology were performed using food sources that closely resembled natural particle composition, such as mixtures of sediment particles and phytoplankton (Kiorboe et al, 1981;Bricelj & Malouf, 1984;Bayne et al, 1987Bayne et al, ,1989Iglesias et al, 1992), detrital particles of plant origin derived from vascular plants and macroalgae (Stuart, 1982;Lucas & Newell, 1984;Newell & Langdon, 1986;Cranford & Grant, 1990) or, even, concentrated natural seston obtained by filtration of natural sea-water (de Villiers & Hodgson, 1993).…”

Section: Introductionmentioning

confidence: 99%

Feeding And Absorption in Cerastoderma Eduee Under Environmental Conditions in the Bay of Marennesoleron (Western France)

et al. 1996

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Physiological processes involved in energy acquisition by the filter-feeding bivalve Cerastoderma edule (L.) (Mollusca: Bivalvia) were quantified under naturally fluctuating feeding conditions imposed by tidal cycles in the Bay of Marennes-Oleron. Physiological measurements were performed during two neap and two spring tidal cycles in order to cover a wide range of seston concentrations (TPM = 15-95 mg I" 1 ). The main effect exerted by tides on the food supply was the resuspension of bottom sediments of low organic content, leading to a strong 'dilution' of suspended organic matter.Although filtration rate was found to increase with seston concentration, ingestion rate was strictly regulated by means of pseudofaeces production. Selection efficiencies for chlorophyll a (SE chl ), overall organic matter (SE 0 ), carbon (SE C ) and nitrogen (SE N ) were estimated and related to dietary descriptors. The following ranking was found for the efficiency with which different substrates were selected: SE chl >SE N >SE o >SE c . Absorption efficiency was found to depend on the organic content of ingested matter according to an exponential saturating function. Observed differences between carbon and nitrogen absorption efficiency were not statistically significant. Absorption rate was kept fairly constant through the wide range of seston concentrations and qualities.Sediment resuspension processes may exert important and variable effects on energy acquisition processes depending on the intensity of resuspension events and the quality of the resuspended matter.

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“…Mikheev, 1967;FosterSmith, 1975;De Villiers & Hodgson, 1993;Fanslow et al, 1995;Dame, 1996). High seston concentration inhibits the filtering activity of the mussels due to the mechanical clogging of their inhaling syphons with suspended particles (Karatayev & Burlakova, 1994), however, threshold concentration levels vary widely as revealed by experiments under controlled conditions: from about 2 mg l -1 (Walz, 1978) to 79 mg l -1 (Reeders & Bij de Vaate, 1990).…”

Section: Discussionmentioning

confidence: 94%

Density effects on the clearance rate of the zebra mussel Dreissena polymorpha: flume study results

Zaiko

Daunys

2011

Hydrobiologia

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Zebra mussel filtration rates and regulating factors have been addressed earlier in a number of studies. Still, only a few of them have taken into consideration the refiltration phenomenon, and therefore the direct extrapolation of experimental results may only give the potential filtering capacity, and hence, over-or underestimate the actual amount of seston being removed by zebra mussels in an ecosystem. The current experimental study aimed to gain insight into the refiltration effect on the clearance rate of the zebra mussels at relatively high seston concentrations, and its potential role in controlling the filtration efficiency of the zebra mussel population. The experiment was conducted in a laboratory flume following the Latin squares design with one fixed (mussel density) and three random factors (initial total particulate matter (TPM) concentration, flume ''wall effect'' and distance from the flume inflow area) considered. The results showed the significant effects of mussel density and the TPM concentration on the effective clearance rate (ECR) of zebra mussels. The higher ECR values were obtained at denser mussel clumps and lower TPM concentrations. The flume ''wall effect'' had no significant effect on the ECR, whereas the distance from the flume inflow area appeared to have a significant impact. A positive relationship between ECR and the zebra mussel density was most evident in the proximity of the TPM source. Based on the results, we assume that at high TPM concentration, refiltration may assert itself by the elevated net clearance rate of mussels within dense clumps compared to that of mussels at relatively low individual densities. This should be taken into consideration while modelling and assessing the role of the zebra mussel in energy flow and redistribution of organic matter in an ecosystem.

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The filtration and feeding physiology of the infaunal estuarine bivalve Solen cylindraceus Hanley 1843

Cited by 13 publications

References 45 publications

The response of two South African east coast estuaries to altered river flow regimes

The response of two South African east coast estuaries to altered river flow regimes

Feeding And Absorption in Cerastoderma Eduee Under Environmental Conditions in the Bay of Marennesoleron (Western France)

Density effects on the clearance rate of the zebra mussel Dreissena polymorpha: flume study results

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