Tracing organic matter sources in riverine suspended sediment: Implications for fine sediment transfers

McConnachie, Jennifer L.; Petticrew, Ellen L.

doi:10.1016/j.geomorph.2005.09.011

Cited by 60 publications

(41 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sediment is often overlooked in discussions of salmon spawning ecology. This omission is usually attributed to the fact that the relevant studies use a fisheries rather than a geomorphological approach (Kondolf 2000;Corenblit et al 2011; but see McConnachie and Petticrew 2006;Moore et al 2007). The results of this experiment indicate that sediment plays a crucial role in two ecological processes outlined below, highlighting the importance of abiotic factors within the salmon disturbance regime.…”

Section: Discussionmentioning

confidence: 99%

“…Several recent studies have highlighted the localized negative effects of redd construction on aquatic habitats (McConnachie and Petticrew 2006;Moore and Schindler 2008), but this ignores the potential for the transfer of nutrients from upstream spawning sites, where localized negative effects occur, to the benefit of downstream ecosystems. The results presented here indicate that this downstream effect can be seen over short distances (, 20 m).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Ecosystem response to a salmon disturbance regime: Implications for downstream nutrient fluxes in aquatic systems

Albers

Petticrew

2011

Limnology & Oceanography

View full text Add to dashboard Cite

Recent work in salmon spawning streams has shown that sediment resuspended during nest construction flocculates with salmon organic matter to form suspended composite particles characterized by increased size and settling velocities. In a river system, these flocs have the potential to interact with benthic biofilms, suggesting a mechanism for the incorporation of organic matter into aquatic food webs. Using the Horsefly River spawning channel in central British Columbia, the spatial scale of biofilm floc trapping was evaluated for a salmon disturbance regime, which consists of the active digging of redds, spawning, and carcass decay. We stocked two sequential enclosures in the spawning channel with sockeye salmon (Oncorhynchus nerka) and established one upstream control enclosure. Biofilms were sampled for chlorophyll a, trapped sediment, and marine isotope tracers (d 15 N and d 13 C). In the active-spawn period, biofilm abundance was reduced due to spawning disturbance, with isotope values indicating low utilization of marine-derived nutrients (MDNs). During the post-spawn period, downstream biofilm abundance exceeded pre-spawn values, indicating a near-field nutrient pulse with isotope values reflecting biofilm utilization of MDNs. At the same time, an increase in biofilm trapping efficiency occurred in concert with a significant increase in the in situ particle size of suspended sediment, suggesting that flocs were a temporary storage site of MDNs. The retention of MDNs over short spatial scales acts to retard the flushing of MDNs to downstream rearing lakes. The magnitude of these processes has ecological implications on the downstream lake's productivity, thereby influencing the success of future salmon stocks.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Ecosystem response to a salmon disturbance regime: Implications for downstream nutrient fluxes in aquatic systems

Albers

Petticrew

2011

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Collins et al 2010a, b), in addition to testing new "fingerprint" properties such as colour parameters, DNA, and total and compound-specific stable isotopes (e.g. Mahler et al 1998;McConnachie and Petticrew 2006;Granger et al 2007;Gibbs 2008;Martínez-Carreras et al 2010) so as to fingerprint the origin of both the inorganic and organic components of sediment. Some further research is, however, needed to test the robustness of the fingerprinting approach, including improvements in developing procedures to account for tracer property uncertainty within the statistical and modeling stages; often the uncertainties associated with sediment source results are not reflecting the real-world situation, and can be misleading.…”

Section: Sediment Tracing and Fingerprintingmentioning

confidence: 99%

Recent advances and future directions in soils and sediments research

Owens

2011

J Soils Sediments

View full text Add to dashboard Cite

“…cultivated, subsoil, forest) are quantified with the analyses and modelling of total organic carbon (TOC), total nitrogen (TN) and carbon and nitrogen stable isotope ratios (d 13 C and d 15 N). These parameters have been effectively used to trace the source of sediment and particulate matter (Fox and Papanicolaou, 2007;Laceby et al, 2015b;McConnachie and Petticrew, 2006). Soil d 15 N increases with depth in the soil profile (Amundson et al, 2003;Natelhoffer and Fry, 1988) whereas TOC and TN decrease Owens et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Do forests represent a long-term source of contaminated particulate matter in the Fukushima Prefecture?

Laceby

Huon

Onda

et al. 2016

Journal of Environmental Management

View full text Add to dashboard Cite

a b s t r a c tThe Fukushima Daiichi Nuclear Power Plant (FDNPP) accident resulted in radiocesium fallout contaminating coastal catchments of the Fukushima Prefecture. As the decontamination effort progresses, the potential downstream migration of radiocesium contaminated particulate matter from forests, which cover over 65% of the most contaminated region, requires investigation. Carbon and nitrogen elemental concentrations and stable isotope ratios are thus used to model the relative contributions of forest, cultivated and subsoil sources to deposited particulate matter in three contaminated coastal catchments. Samples were taken from the main identified sources: cultivated (n ¼ 28), forest (n ¼ 46), and subsoils (n ¼ 25). Deposited particulate matter (n ¼ 82) was sampled during four fieldwork campaigns from November 2012 to November 2014. A distribution modelling approach quantified relative source contributions with multiple combinations of element parameters (carbon only, nitrogen only, and four parameters) for two particle size fractions (<63 mm and <2 mm). Although there was significant particle size enrichment for the particulate matter parameters, these differences only resulted in a 6% (SD 3%) mean difference in relative source contributions. Further, the three different modelling approaches only resulted in a 4% (SD 3%) difference between relative source contributions. For each particulate matter sample, six models (i.e. <63 mm and <2 mm from the three modelling approaches) were used to incorporate a broader definition of potential uncertainty into model results. Forest sources were modelled to contribute 17% (SD 10%) of particulate matter indicating they present a long term potential source of radiocesium contaminated material in fallout impacted catchments. Subsoils contributed 45% (SD 26%) of particulate matter and cultivated sources contributed 38% (SD 19%). The reservoir of radiocesium in forested landscapes in the Fukushima region represents a potential long-term source of particulate contaminated matter that will require diligent management for the foreseeable future.

show abstract

Tracing organic matter sources in riverine suspended sediment: Implications for fine sediment transfers

Cited by 60 publications

References 41 publications

Ecosystem response to a salmon disturbance regime: Implications for downstream nutrient fluxes in aquatic systems

Ecosystem response to a salmon disturbance regime: Implications for downstream nutrient fluxes in aquatic systems

Recent advances and future directions in soils and sediments research

Do forests represent a long-term source of contaminated particulate matter in the Fukushima Prefecture?

Contact Info

Product

Resources

About