Life‐history and production of the amphipod <i>Gammarus pulex</i> in a Dorset chalk stream

Welton, J. S.

doi:10.1111/j.1365-2427.1979.tb01508.x

Cited by 137 publications

(104 citation statements)

References 22 publications

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“…Iversen and Jessen (1977) reported 38 kg. ha-l for Gammurus pulex in a Danish spring, and Welton (1979) reported nearly 130 kg* ha-r for the same species in an English stream. Of course, as noted previously, G. pseudolimnaeus was the predominant macroinvertebrate in Valley Creek, as it was also in Tilly's spring; perhaps production rates of single species at these high levels is to be expected only under similar circumstances.…”

Section: Discussionmentioning

confidence: 99%

Annual production and drift of the stream amphipod Gammarus pseudolimnaeus in Valley Creek, Minnesota1

Waters

Hokenstrom

1980

Limnology & Oceanography

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Annual production and drift of Gammarus pseudolimnaeus were measured in a 100‐m section of Valley Creek for the 5‐year period 1968–1973. Production was estimated by the procedure previously termed the “Hynes method,” herein proposed to be termed the “size‐frequency method.” Annual production was 271 and 231 kg·ha−1 (dry wt) in the first 2 years but declined subsequently to a low of 64 kg·ha−1, apparently the result of a severe siltation. Annual mean daily drift corresponded, being high at 41 and 46 g·d−1·m−3 s−1 in the first 2 years, but only about 7 and 11 in the last 2 years. Mean annual standing stock was also high in the first 2 years (47 and 35 kg·ha−1) but substantially lower n the last 2 years (11 and 17); mean annual density was 7,176 and 6,849·m−2 in the first 2 years and 1,586 and 2,363·m−2 in the last 2 years. Annual P:B ratios were 5.7–6.6 over the 5‐year period, with an average of 6.0.

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Section: Discussionmentioning

confidence: 99%

Annual production and drift of the stream amphipod Gammarus pseudolimnaeus in Valley Creek, Minnesota1

Waters

Hokenstrom

1980

Limnology & Oceanography

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“…P. lucens is one of the most preferred submerged macrophytes by L. stagnalis and also a common macrophyte in the Netherlands. The crustacean G. pulex is one of the most important invertebrate species in temperate streams, which is widely distributed throughout Europe (Holdich & Pöckl 2007), and can reach a density of 10,000 m -2 and has a continued mortality throughout the year (Welton, 1979). G. pulex feeds on a variety of debris, such as oak and elm leaves (Sutcliffe et al, 1981).…”

Section: Model Systemmentioning

confidence: 99%

The effect of temperature on herbivory by the omnivorous ectotherm snail Lymnaea stagnalis

et al. 2016

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Rising temperatures likely affect the trophic interactions in temperate regions as global warming progresses. An open question is how a temperature rise may affect consumer pressure and plant abundance in shallow aquatic ecosystems, where most consumers are omnivorous. Interestingly, herbivory (plant-eating) is more prevalent toward low latitudes in ectotherms such as fish and aquatic invertebrates, and this may be temperature driven. We used pond snails (Lymnaea stagnalis L.) as a model aquatic ectotherm species and tested their consumption of both animal prey (Gammarus pulex L.) and plant material (Potamogeton lucens L.) at three different temperatures (15, 20, and 25°C). Higher temperatures led to higher consumption rates by the omnivore on both plant food and animal prey when fed separately. When the food was offered simultaneously, the pond snails consistently preferred animal prey over plant material at all tested temperatures. However, the omnivore did consume plant material even though they had enough animal prey available to them. Based on our experiments, we conclude that with increasing temperatures, L. stagnalis will only increase their consumption rates but not change food preference. Further studies are needed to test the generality of our findings across aquatic species to predict the effect of warming on aquatic plant consumption.

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“…For instance, laboratory experiments commonly utilise fixed temperatures, whereas in nature temperatures are variable, which may affect development and survival rates (Howe, 1967). The second extreme is field monitoring, where only changes in the size structure of populations can be tracked under fluctuating conditions (Gee, 1988;Goedmakers, 1981;Welton, 1979). Parameter identification is difficult because: (1) the environmental factor fluctuates naturally and not in the range and frequency that would guarantee the uniqueness of the parameters, (2) growth and survival must be parameterised simultaneously such that potential correlations increase uncertainty, and (3) additional environmental factors might be ignored.…”

Section: Introductionmentioning

confidence: 99%

From population-level effects to individual response: modelling temperature dependence in Gammarus pulex

Moenickes

Schneider

Mühle

et al. 2011

Journal of Experimental Biology

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SUMMARYPopulation-level effects of global warming result from concurrent direct and indirect processes. They are typically described by physiologically structured population models (PSPMs). Therefore, inverse modelling offers a tool to identify parameters of individual physiological processes through population-level data analysis, e.g. the temperature dependence of growth from size-frequency data of a field population. Here, we make use of experiments under laboratory conditions, in mesocosms and field monitoring to determine the temperature dependence of growth and mortality of Gammarus pulex. We found an optimum temperature for growth of approximately 17°C and a related temperature coefficient, Q 10 , of 1.5°C -1 , irrespective of whether we classically fitted individual growth curves or applied inverse modelling based on PSPMs to laboratory data. From a comparison of underlying data sets we conclude that applying inverse modelling techniques to population-level data results in meaningful response parameters for physiological processes if additional temperature-driven effects, including within-population interaction, can be excluded or determined independently. If this is not the case, parameter estimates describe a cumulative response, e.g. comprising temperature-dependent resource dynamics. Finally, fluctuating temperatures in natural habitats increased the uncertainty in parameter values. Here, PSPM should be applied for virtual monitoring in order to determine a sampling scheme that comprises important dates to reduce parameter uncertainty. Supplementary material available online at

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Life‐history and production of the amphipod Gammarus pulex in a Dorset chalk stream

Cited by 137 publications

References 22 publications

Annual production and drift of the stream amphipod Gammarus pseudolimnaeus in Valley Creek, Minnesota1

Annual production and drift of the stream amphipod Gammarus pseudolimnaeus in Valley Creek, Minnesota1

The effect of temperature on herbivory by the omnivorous ectotherm snail Lymnaea stagnalis

From population-level effects to individual response: modelling temperature dependence in Gammarus pulex

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