dc.date.accessioned | 2017-12-11T15:46:25Z | |
dc.date.available | 2017-12-11T15:46:25Z | |
dc.date.created | 2017-11-17T14:41:36Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Halvorson, Halvor M. Sperfeld, Erik Evans-White, Michelle, A. . Quantity and quality limit detritivore growth: mechanisms revealedby ecological stoichiometry and co-limitation theory. Ecology. 2017, 1-8 | |
dc.identifier.uri | http://hdl.handle.net/10852/59314 | |
dc.description.abstract | Resource quantity and quality are fundamental bottom-up constraints on consumers. Best understood in autotroph-based systems, co-occurrence of these constraints may be common but remains poorly studied in detrital-based systems. Here, we used a laboratory growth experiment to test limitation of the detritivorous caddisfly larvae Pycnopsyche lepida across a concurrent gradient of oak litter quantity (food supply) and quality (phosphorus : carbon [P:C ratios]). Growth increased simultaneously with quantity and quality, indicating co-limitation across the resource gradients. We merged approaches of ecological stoichiometry and co-limitation theory, showing how co-limitation reflected shifts in C and P acquisition throughout homeostatic regulation. Increased growth was best explained by elevated consumption rates and improved P assimilation, which both increased with elevated quantity and quality. Notably, C assimilation efficiencies remained unchanged and achieved maximum 18% at low quantity despite pronounced C limitation. Detrital C recalcitrance and substantive post-assimilatory C losses probably set a minimum quantity threshold to achieve positive C balance. Above this threshold, greater quality enhanced larval growth probably by improving P assimilation toward P-intensive growth. We suggest this interplay of C and P acquisition contributes to detritivore co-limitation, highlighting quantity and quality as potential simultaneous bottom-up controls in detrital-based ecosystems, including under anthropogenic change like nutrient enrichment.
© 2017 Ecological Society of America | en_US |
dc.language | EN | |
dc.title | Quantity and quality limit detritivore growth: mechanisms revealedby ecological stoichiometry and co-limitation theory | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Halvorson, Halvor M. | |
dc.creator.author | Sperfeld, Erik | |
dc.creator.author | Evans-White, Michelle, A. | |
cristin.unitcode | 185,15,29,50 | |
cristin.unitname | Centre for Ecological and Evolutionary Synthesis | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1515405 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology&rft.volume=&rft.spage=1&rft.date=2017 | |
dc.identifier.jtitle | Ecology | |
dc.identifier.startpage | 1 | |
dc.identifier.endpage | 8 | |
dc.identifier.doi | http://dx.doi.org/10.1002/ecy.2026 | |
dc.identifier.urn | URN:NBN:no-61999 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0012-9658 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/59314/1/Halvorson_Sperfeld_Evans-White_2017_Ecology.pdf | |
dc.type.version | PublishedVersion | |