Consequences of warming and resource quality on the stoichiometry and nutrient cycling of a stream shredder

PloS One
E Mas-MartíI Muñoz

Abstract

As a result of climate change, streams are warming and their runoff has been decreasing in most temperate areas. These changes can affect consumers directly by increasing their metabolic rates and modifying their physiology and indirectly by changing the quality of the resources on which organisms depend. In this study, a common stream detritivore (Echinogammarus berilloni Catta) was reared at two temperatures (15 and 20°C) and fed Populus nigra L. leaves that had been conditioned either in an intermittent or permanent reach to evaluate the effects of resource quality and increased temperatures on detritivore performance, stoichiometry and nutrient cycling. The lower quality (i.e., lower protein, soluble carbohydrates and higher C:P and N:P ratios) of leaves conditioned in pools resulted in compensatory feeding and lower nutrient retention capacity by E. berilloni. This effect was especially marked for phosphorus, which was unexpected based on predictions of ecological stoichiometry. When individuals were fed pool-conditioned leaves at warmer temperatures, their growth rates were higher, but consumers exhibited less efficient assimilation and higher mortality. Furthermore, the shifts to lower C:P ratios and higher lipid concent...Continue Reading

References

Oct 1, 1984·Applied and Environmental Microbiology·G Bratbak, I Dundas
Jul 24, 2002·Journal of Chromatography. a·John V HeadleyRichard D Robarts
Aug 1, 1959·Canadian Journal of Biochemistry and Physiology·E G BLIGH, W J DYER
Feb 25, 2005·The American Naturalist·Thomas R AndersonJotaro Urabe
Feb 1, 1993·Applied and Environmental Microbiology·M O Gessner, E Chauvet
Feb 1, 1996·Applied and Environmental Microbiology·M O Gessner, A L Schmitt

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