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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03902naa a2200433 4500 | |
| 001 | oai:DiVA.org:su-202282 | |
| 003 | SwePub | |
| 008 | 220223s2022 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2022822 URI |
| 024 | 7 | a https://doi.org/10.1016/j.marenvres.2021.1055412 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Källberg Normark, Lydiau Stockholms universitet,Institutionen för ekologi, miljö och botanik4 aut0 (Swepub:su)lyka8346 |
| 245 | 1 0 | a Isotopic niche size variability in an ecosystem engineer along a disturbance gradient in a South African lagoon |
| 264 | 1 | b Elsevier BV,c 2022 |
| 338 | a print2 rdacarrier | |
| 520 | a A key challenge for natural resource management is how to detect effects of environmental stress on individuals and populations before declines in abundance occur. Variability in carbon and nitrogen isotope composition (δ13C and δ15N) among consumers can provide information on the population trophic niche and how it may change in response to environmental stress. We measured δ13C and δ15N values in primary producers and in an ecosystem engineer, the bioturbating sandprawn Kraussillichirus kraussi, in Langebaan Lagoon, South Africa, along a human disturbance gradient. Diet partitioning mixing models were coupled with isotope niche analyses and individual body condition data to investigate shifts in resource utilisation and diet plasticity from minimally to highly disturbed sites. The δ15N values of seagrass, Zostera capensis indicated a nutrient gradient, with the highest δ15N values at highly disturbed sites indicating either anthropogenic or marine nitrogen inputs. A decreasing δ15N signal with distance from human disturbance/mouth of lagoon was however not evident for sandprawns nor their presumed dietary sources (phytoplankton, microphytobenthos or sediment organic matter), likely because of faster isotope turnover time compared to seagrass and/or differential fractionation for sandprawns among the sites. Sandprawn isotope niche sizes varied among sites, with no trend along the disturbance gradient. The smallest niche coincided with uniform feeding on microphytobenthos according to mixing models. On an individual level, deviating isotope values from population means were correlated to better body condition, suggesting that a divergent feeding strategy is beneficial. Our results support a generalist feeding behavior of the sandprawns with no evidence of reduced physiological status at the site with most human disturbance. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng |
| 653 | a Environmental status assessment | |
| 653 | a Nutrient gradient | |
| 653 | a Stable isotopes | |
| 653 | a Trophic niche | |
| 653 | a Body condition | |
| 653 | a Marine invertebrates | |
| 700 | 1 | a Liénart, Camillau Stockholms universitet,Institutionen för ekologi, miljö och botanik4 aut0 (Swepub:su)cali4960 |
| 700 | 1 | a Pillay, Deena4 aut |
| 700 | 1 | a Garbaras, Andrius4 aut |
| 700 | 1 | a Savage, Candida4 aut |
| 700 | 1 | a Karlson, Agnes M. L.u Stockholms universitet,Institutionen för ekologi, miljö och botanik4 aut0 (Swepub:su)agka0879 |
| 710 | 2 | a Stockholms universitetb Institutionen för ekologi, miljö och botanik4 org |
| 773 | 0 | t Marine Environmental Researchd : Elsevier BVg 173q 173x 0141-1136x 1879-0291 |
| 856 | 4 | u https://doi.org/10.1016/j.marenvres.2021.105541y Fulltext |
| 856 | 4 | u https://doi.org/10.1016/j.marenvres.2021.105541 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-202282 |
| 856 | 4 8 | u https://doi.org/10.1016/j.marenvres.2021.105541 |
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