Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems
1. Animal defecation, or egestion, is a pronounced transformation of organic matter in many ecosystems. However, because egesta have been presumed recalcitrant and low-nutrient, their significance and variability as an animal nutrient flux in aquatic settings - especially relative to mineralization...
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ftdryad:oai:v1.datadryad.org:10255/dryad.139717 2023-05-15T16:29:55+02:00 Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems Halvorson, Halvor M. Hall, Delaney J. Evans-White, Michelle A. Greenland Arkansas 2017-04-05T16:20:53Z http://hdl.handle.net/10255/dryad.139717 https://doi.org/10.5061/dryad.pp700 unknown doi:10.5061/dryad.pp700/1 doi:10.1111/1365-2435.12875 doi:10.5061/dryad.pp700 Halvorson HM, Hall DJ, Evans-White MA (2017) Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems. Functional Ecology 31(9): 1802-1812. 0269-8463 http://hdl.handle.net/10255/dryad.139717 streams detritivores macroinvertebrates faeces ecological stoichiometry fine particulate organic matter (FPOM) Tipulidae Asellidae Capniidae Article 2017 ftdryad https://doi.org/10.5061/dryad.pp700 https://doi.org/10.5061/dryad.pp700/1 https://doi.org/10.1111/1365-2435.12875 2020-01-01T15:47:38Z 1. Animal defecation, or egestion, is a pronounced transformation of organic matter in many ecosystems. However, because egesta have been presumed recalcitrant and low-nutrient, their significance and variability as an animal nutrient flux in aquatic settings - especially relative to mineralization via excretion - are poorly known. 2. We compared carbon (C), nitrogen (N), and phosphorus (P) dynamics over short- to long-term (up to 107 days) microbial decomposition of egesta from the aquatic shredders Allocapnia spp., Lirceus spp., and Tipula spp. fed low- or high-P content Platanus occidentalis litter to investigate roles of egesta in aquatic nutrient dynamics. 3. Tipula produced N- and P-deplete egesta of higher N:P compared to Lirceus and Allocapnia, and high-P diets increased egesta P content compared to low-P diets. Despite measurable C losses to decomposition, these differences in nutrient content persisted through decomposition, showing diet and species control both immediate and long-term properties of egested particles. 4. Egesta switched between uptake and release of dissolved phosphorus and ammonium during decomposition, and exhibited consistent net N uptake as nitrate-nitrite. Across species and diets, lower N:P egesta tended to exhibit greater uptake of dissolved inorganic N, suggesting P enrichment of egesta drove stronger dissolved N demand by decomposer microbes. 5. Shredder egesta exhibit stable nutrient contents long-term and, counter to assumptions that they are negligible or minor net sources, can be strong, extended sinks of dissolved inorganic nutrients. Future studies should consider contrasts between animal nutrient fluxes as excretion, which facilitates nutrient recycling via mineralization, versus egestion, which slows nutrient recycling via organic nutrient repackaging and can create sinks of dissolved nutrients. Article in Journal/Newspaper Greenland Dryad Digital Repository (Duke University) Greenland |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
streams detritivores macroinvertebrates faeces ecological stoichiometry fine particulate organic matter (FPOM) Tipulidae Asellidae Capniidae |
spellingShingle |
streams detritivores macroinvertebrates faeces ecological stoichiometry fine particulate organic matter (FPOM) Tipulidae Asellidae Capniidae Halvorson, Halvor M. Hall, Delaney J. Evans-White, Michelle A. Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
topic_facet |
streams detritivores macroinvertebrates faeces ecological stoichiometry fine particulate organic matter (FPOM) Tipulidae Asellidae Capniidae |
description |
1. Animal defecation, or egestion, is a pronounced transformation of organic matter in many ecosystems. However, because egesta have been presumed recalcitrant and low-nutrient, their significance and variability as an animal nutrient flux in aquatic settings - especially relative to mineralization via excretion - are poorly known. 2. We compared carbon (C), nitrogen (N), and phosphorus (P) dynamics over short- to long-term (up to 107 days) microbial decomposition of egesta from the aquatic shredders Allocapnia spp., Lirceus spp., and Tipula spp. fed low- or high-P content Platanus occidentalis litter to investigate roles of egesta in aquatic nutrient dynamics. 3. Tipula produced N- and P-deplete egesta of higher N:P compared to Lirceus and Allocapnia, and high-P diets increased egesta P content compared to low-P diets. Despite measurable C losses to decomposition, these differences in nutrient content persisted through decomposition, showing diet and species control both immediate and long-term properties of egested particles. 4. Egesta switched between uptake and release of dissolved phosphorus and ammonium during decomposition, and exhibited consistent net N uptake as nitrate-nitrite. Across species and diets, lower N:P egesta tended to exhibit greater uptake of dissolved inorganic N, suggesting P enrichment of egesta drove stronger dissolved N demand by decomposer microbes. 5. Shredder egesta exhibit stable nutrient contents long-term and, counter to assumptions that they are negligible or minor net sources, can be strong, extended sinks of dissolved inorganic nutrients. Future studies should consider contrasts between animal nutrient fluxes as excretion, which facilitates nutrient recycling via mineralization, versus egestion, which slows nutrient recycling via organic nutrient repackaging and can create sinks of dissolved nutrients. |
format |
Article in Journal/Newspaper |
author |
Halvorson, Halvor M. Hall, Delaney J. Evans-White, Michelle A. |
author_facet |
Halvorson, Halvor M. Hall, Delaney J. Evans-White, Michelle A. |
author_sort |
Halvorson, Halvor M. |
title |
Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
title_short |
Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
title_full |
Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
title_fullStr |
Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
title_full_unstemmed |
Data from: Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
title_sort |
data from: long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.139717 https://doi.org/10.5061/dryad.pp700 |
op_coverage |
Greenland Arkansas |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
doi:10.5061/dryad.pp700/1 doi:10.1111/1365-2435.12875 doi:10.5061/dryad.pp700 Halvorson HM, Hall DJ, Evans-White MA (2017) Long-term stoichiometry and fates highlight animal egestion as nutrient repackaging, not recycling, in aquatic ecosystems. Functional Ecology 31(9): 1802-1812. 0269-8463 http://hdl.handle.net/10255/dryad.139717 |
op_doi |
https://doi.org/10.5061/dryad.pp700 https://doi.org/10.5061/dryad.pp700/1 https://doi.org/10.1111/1365-2435.12875 |
_version_ |
1766019634367037440 |