دورية أكاديمية
A quantitative analysis of organic matter inputs to soft sediment communities surrounding salmon farms in the Marlborough Sounds region of New Zealand.
| العنوان: | A quantitative analysis of organic matter inputs to soft sediment communities surrounding salmon farms in the Marlborough Sounds region of New Zealand. |
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| المؤلفون: | McMullin RM; Department of Marine Science, University of Otago, Dunedin, New Zealand. Electronic address: rebecca.mcmullin@otago.ac.nz., Sabadel AJM; Department of Chemistry, University of Otago, Dunedin, New Zealand., Hageman KJ; Department of Chemistry and Biochemistry, Utah State University, Logan, UT, USA., Wing SR; Department of Marine Science, University of Otago, Dunedin, New Zealand. |
| المصدر: | The Science of the total environment [Sci Total Environ] 2021 Jun 15; Vol. 773, pp. 145146. Date of Electronic Publication: 2021 Feb 02. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam, Elsevier. |
| مواضيع طبية MeSH: | Geologic Sediments* , Salmon*, Animals ; Aquaculture ; New Zealand ; Seafood |
| مستخلص: | Local differences in trophic structure and composition of organic matter subsidies can influence the capacity of soft sediment communities to assimilate recycled organic matter from processes such as salmon farm enrichment. The present study combines biochemical analysis with biomass density information on soft sediment taxa collected within the depositional footprint of salmon farms and at reference sites in the Marlborough Sounds, New Zealand. Distinct biochemical signatures confirmed that the flux of organic matter from salmon farms was an important subsidy for soft sediment communities. Isotopic modelling demonstrated that the proportion of biomass supported by farm-derived organic matter did not change in a consistent pattern along the 300 m gradient from each farm site, whereas the average trophic level of communities decreased with increasing proximity to farms. High variability in both the total biomass and the distribution of biomass across trophic levels occurred among sites downstream of farms and among individual farms. Consequently, estimates of basal organic matter assimilation per unit area by communities differed by several orders of magnitude among sites. Total organic matter assimilation tended to decrease with increasing proximity to farms due to a shift towards a more detrital based community. Differences in basal organic matter assimilation among farms did not appear to be directly related to local flow regime, but instead was closely linked to differences in the soft sediment community composition likely influenced by an array of anthropogenic and environmental factors. The results presented here highlight the importance of considering local variability in basal organic matter source pools, and the potential for synergistic and cumulative effects to drive changes in food web trophodynamics when assessing the impacts of aquaculture on soft sediment communities. Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2021 Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Aquaculture; Biochemical tracer; Depositional footprint; Fatty acid; Organic matter flux; Stable isotope |
| تواريخ الأحداث: | Date Created: 20210214 Date Completed: 20210406 Latest Revision: 20210406 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1016/j.scitotenv.2021.145146 |
| PMID: | 33582324 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1026 |
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| DOI: | 10.1016/j.scitotenv.2021.145146 |