caa a22 4500 445894032 CHVBK 20180317145625.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10750-011-0837-7 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0837-7 Detritivores feeding on poor quality food are more sensitive to increased temperatures [Elektronische Daten] [Verónica Díaz Villanueva, Ricardo Albariño, Cristina Canhoto] As temperature increases the metabolic rates, the effect of warming on animals will also enhance animal-driven nutrient cycling with important consequences on ecosystem dynamics. We tested the effects of increased temperature (15 and 20°C, optimal and suboptimal temperatures, respectively) on metabolic rates of the shredder larvae Sericostoma vittatum fed on three diets, Alnus glutinosa (L.) Gaertn., Eucalyptus globulus Labill. and Quercus robur L. We measured P and N content in leaves, faeces and excreta and calculated C, N, and P assimilation efficiencies, and mass balances. Carbon assimilation efficiency (AE) was reduced at 20°C when larvae fed on Q. robur; nitrogen-AE was reduced at 20°C in all diets and phosphorus-AE was not affected by temperature. Larvae achieved a net N gain in all treatments, however, increased temperatures had a negative effect on N incorporation into body tissue. The mass balance of P was negatively affected by temperature; larvae fed on Q. robur and on E. globulus had null balances at 15°C and negative at 20°C. Our results showed that high temperature increased nutrient excretion and affected N:P ratios in excreta, thus changes in temperature may have severe consequences on larval mediated leaf litter processing and nutrient cycling. However, the type of diet seemed to modulate the way temperature affects larval metabolism regarding excretion rate and assimilation efficiencies. The extent to which optimal-suboptimal temperature variation will alter detritivore metabolism performance, internal nutrient balance and hence, cycling of elements in the environment seems crucial under global warming scenarios. Springer Science+Business Media B.V., 2011 Temperature nationallicence Detritivores nationallicence Ecological stoichiometry nationallicence Nutrient cycling nationallicence Streams nationallicence Díaz Villanueva Verónica Laboratorio de Limnologia-INIBIOMA, Universidad Nacional del Comahue, Quintral 1250, 8400, Bariloche, Argentina aut Albariño Ricardo Laboratorio de Limnologia-INIBIOMA, Universidad Nacional del Comahue, Quintral 1250, 8400, Bariloche, Argentina aut Canhoto Cristina IMAR & Department of Zoology, University of Coimbra, 3004-517, Coimbra, Portugal aut Hydrobiologia Springer Netherlands 678/1(2011-12-01), 155-165 0018-8158 678:1<155 2011 678 10750 https://doi.org/10.1007/s10750-011-0837-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0837-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Díaz Villanueva Verónica Laboratorio de Limnologia-INIBIOMA, Universidad Nacional del Comahue, Quintral 1250, 8400, Bariloche, Argentina aut NATIONALLICENCE 700 1- Albariño Ricardo Laboratorio de Limnologia-INIBIOMA, Universidad Nacional del Comahue, Quintral 1250, 8400, Bariloche, Argentina aut NATIONALLICENCE 700 1- Canhoto Cristina IMAR & Department of Zoology, University of Coimbra, 3004-517, Coimbra, Portugal aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 678/1(2011-12-01), 155-165 0018-8158 678:1<155 2011 678 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer