Academic Journal
Elucidating stygofaunal trophic web interactions via isotopic ecology
| العنوان: | Elucidating stygofaunal trophic web interactions via isotopic ecology |
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| المؤلفون: | Saccò, M., Blyth, A.J., Humphreys, W.F., Kuhl, A., Mazumder, D., Smith, C., Grice, K. |
| المساهمون: | Riascos, J.M. |
| المصدر: | http://dx.doi.org/10.1371/journal.pone.0223982. |
| بيانات النشر: | Plos One |
| سنة النشر: | 2019 |
| المجموعة: | The University of Adelaide: Digital Library |
| مصطلحات موضوعية: | Larvae, trophic interactions, beetles, predation, amino acid analysis, food, copepods, food web structure, Animals, Invertebrates, Carbon Isotopes, Nitrogen Isotopes, Glutamic Acid, Phenylalanine, Biodiversity, Australia, Aquatic Organisms |
| الوصف: | Subterranean ecosystems host highly adapted aquatic invertebrate biota which play a key role in sustaining groundwater ecological functioning and hydrological dynamics. However, functional biodiversity studies in groundwater environments, the main source of unfrozen freshwater on Earth, are scarce, probably due to the cryptic nature of the systems. To address this, we investigate groundwater trophic ecology via stable isotope analysis, employing δ13C and δ15N in bulk tissues, and amino acids. Specimens were collected from a shallow calcrete aquifer in the arid Yilgarn region of Western Australia: a well-known hot-spot for stygofaunal biodiversity. Sampling campaigns were carried out during dry (low rainfall: LR) and the wet (high rainfall: HR) periods. δ13C values indicate that most of the stygofauna shifted towards more 13C-depleted carbon sources under HR, suggesting a preference for fresher organic matter. Conversion of δ15N values in glutamic acid and phenylalanine to a trophic index showed broadly stable trophic levels with organisms clustering as low-level secondary consumers. However, mixing models indicate that HR conditions trigger changes in dietary preferences, with increasing predation of amphipods by beetle larvae. Overall, stygofauna showed a tendency towards opportunistic and omnivorous habits-typical of an ecologically tolerant community-shaped by bottom-up controls linked with changes in carbon flows. This study provides baseline biochemical and ecological data for stygofaunal trophic interactions in calcretes. Further studies on the carbon inputs and taxa-specific physiology will help refine the interpretation of the energy flows shaping biodiversity in groundwaters. This will aid understanding of groundwater ecosystem functioning and allow modelling of the impact of future climate change factors such as aridification. ; Mattia Saccò, Alison J. Blyth, William F. Humphreys, Alison Kuhl, Debashish Mazumder, Colin Smith . et al. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1932-6203 |
| Relation: | http://purl.org/au-research/grants/arc/LP140100555; PLoS One, 2019; 14(10):e0223982-1-e0223982-25; https://hdl.handle.net/2440/133231 |
| DOI: | 10.1371/journal.pone.0223982 |
| الاتاحة: | https://hdl.handle.net/2440/133231 https://doi.org/10.1371/journal.pone.0223982 |
| Rights: | © 2019 Saccò et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| رقم الانضمام: | edsbas.67F27465 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 19326203 |
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| DOI: | 10.1371/journal.pone.0223982 |