Categorizing zonal productivity on the continental shelf with nutrient-salinity ratios

Kim, Jongsun; Chapman, Piers; Rowe, Gilbert T.; DiMarco, Steven F.

doi:10.1016/j.jmarsys.2020.103336

Cited by 5 publications

(7 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The freshwater end-member is dominated by physical forcing with high nutrient concentrations, and the sea end-member correlates with marine currents. The mixing model is based on nutrientsalinity relationships (Rowe and Chapman, 2002;Kim et al, 2020), described as:…”

Section: Discussionmentioning

confidence: 99%

“…The riverine inputs have provided enriched nutrient resources for the marine microorganisms. Considering the mixing degree of freshwater and seawater, the nutrient-salinity relationships also reflected the source and sink patterns besides the dilution process (Shulkin et al, 2018;Kim et al, 2020). Changes in nutrient concentrations were then considerably modulated by biological uptake processes associated with the physical mixing.…”

Section: Effect Of the Pearl River Dischargementioning

confidence: 99%

See 1 more Smart Citation

Nutrient Pollution and Its Dynamic Source-Sink Pattern in the Pearl River Estuary (South China)

Tao¹,

Niu²,

Dong³

et al. 2021

Front. Mar. Sci.

View full text Add to dashboard Cite

Nutrient enrichment and its quantitative cause-effect chains of the biogeochemical processes have scarcely been documented in the Pearl River Estuary (South China). Field investigations of nutrient samples taken between 1996 and 2018 showed significant differences in nitrogen and phosphorus with times and sites. The concentrations of DIN and DIP gradually increased over the past two decades, with good fitted linear curves (R2 = 0.31 for DIN, R2 = 0.92 for DIP); while the temporal variation in DSi was non-significant. Higher levels of nitrogen and silicate mainly appeared in the upper estuary because of the riverine influence. The phosphorus pollution was accumulated in the northeast (e.g., Shenzhen bay). The aquatic environment was highly sensitive to nutrient pollution and eutrophication risk, which accordingly corresponded to high phytoplankton production and biodiversity. Phosphorus was the limiting factor of phytoplankton growth in this estuary, and more frequently caused the eutrophication risks and blooms. The nutrient pollution was largely influenced by riverine inputs, quantified by PCA-generation, and the contributions of coastal emission and atmospheric deposition were followed. The two-end member mixing model differentiated the physical alterations from the biological activity and identified the dynamic source-sink patterns of nutrient species. Nitrogen and silicate had relatively conservative behaviors in the estuary and phosphate showed an active pattern.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Effect Of the Pearl River Dischargementioning

confidence: 99%

Nutrient Pollution and Its Dynamic Source-Sink Pattern in the Pearl River Estuary (South China)

Tao¹,

Niu²,

Dong³

et al. 2021

Front. Mar. Sci.

View full text Add to dashboard Cite

show abstract

“…This result agrees with prior work, which documented a positive relationship between abundance and richness in reef habitats globally (Edgar et al 2017), but occurs despite generally opposing effects of salinity on richness and diversity (positive relationship until 33–34 ‰) and fish biomass and density (negative relationship; Table 2). As identified above, salinity and productivity are closely related in the Gulf of Mexico (Kim et al 2020), and many of the platforms that exhibited high levels of fish biomass, density, diversity, and richness were located offshore of the Atchafalaya River. The Atchafalaya River has an important influence on the productivity and physiochemical characteristics of the region’s waters (Hetland and DiMarco 2008; DiMarco et al 2010; Kim et al 2020).…”

Section: Discussionmentioning

confidence: 92%

“…In other words, it is unlikely that the range of salinities we encountered was physiologically stressful to the fishes in our study. Instead, salinity is negatively associated with productivity (Kim et al 2020) and tracks Caribbean water masses containing diverse groups of fish larvae in offshore areas of the GOM (Gallaway 1981; Gallaway and Lewbell 1982). Temperature is likely similar to salinity in acting indirectly and tracing water masses (Mamayev 2010).…”

Section: Discussionmentioning

confidence: 99%

Optic–acoustic Analysis of Fish Assemblages at Petroleum Platforms

et al. 2021

View full text Add to dashboard Cite

Petroleum platforms provide high‐relief reef habitat in several ocean basins and are important to fishes and fishers alike. To determine which variables were important for shaping platform‐associated fish assemblages on a basin‐wide scale in the U.S. Gulf of Mexico, we employed optic and acoustic methods to measure fish distribution (geographic and water‐column), abundance, biomass, density, size, diversity, and richness at 54 platforms. We found that variables related to freshwater inflow and meso‐scale circulation patterns (e.g., salinity) affected more metrics than platform characteristics (e.g., platform depth). Platform fish assemblages varied gradually along gradients of these variables instead of exhibiting distinct assemblage groupings in non‐metric multidimensional scaling space. These effects contributed to the presence of biomass, density, diversity, and richness “hotspots” at platforms offshore of the Atchafalaya River. Our findings underscore the importance of freshwater inflow and circulation patterns in explaining variation in reef fish assemblages in the U.S. Gulf of Mexico.

show abstract

“…They are useful tools for calculating material fluxes and estimating system‐wide processes including PP and net ecosystem metabolism in coastal systems (Kim et al 2020 a ). A recent application of the approach in the Gulf of Mexico supported the delineation of productivity zones linked to nutrient‐salinity ratios (Kim et al 2020 b ). These models have been successfully applied in many systems, including the Patuxent River estuary of the Chesapeake Bay (Testa et al 2008), the mainstem Chesapeake Bay (Testa et al 2018), and around the world through the Land Ocean Interactions in the Coastal Zone (LOICZ) program (Smith et al 2010; Swaney et al 2011; Ramesh et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Reconstructing primary production in a changing estuary: A mass balance modeling approach

Kim

Brush

Song

et al. 2021

Limnology & Oceanography

Self Cite

View full text Add to dashboard Cite

Estuarine primary production (PP) is a critical rate process for understanding ecosystem function and response to environmental change. PP is fundamentally linked to estuarine eutrophication, and as such should respond to ongoing efforts to reduce nutrient inputs to estuaries globally. However, concurrent changes including warming, altered hydrology, reduced input of sediments, and emergence of harmful algal blooms (HABs) could interact with nutrient management to produce unexpected changes in PP. Despite its fundamental importance, estuarine PP is rarely measured. We reconstructed PP in the York River Estuary with a novel mass balance model based on dissolved inorganic nitrogen (DIN) for the period 1994–2018. Modeled PP compared well to previous estimates and demonstrated a long‐term increase and down‐estuary shift over the study period. This increase occurred despite reductions in discharge, flushing time, DIN loading, and DIN standing stock over the same period. Increased PP corresponded to increased water temperature, decreased turbidity and light attenuation, and increased photic depth and assimilation ratio, suggesting that phytoplankton in the York River Estuary have become more efficient at converting nutrients into biomass primarily due to a release from light limitation. The increase in PP also coincided with the increasing occurrence of late summer HABs in the lower York River Estuary, including the emergence of a second bloom‐forming dinoflagellate in 2007. Results demonstrate how changes concurrent with nutrient management could alter expected system responses and illustrate the utility of the mass balance approach for estimating critical rate processes like PP in the absence of observations.

show abstract

Categorizing zonal productivity on the continental shelf with nutrient-salinity ratios

Cited by 5 publications

References 39 publications

Nutrient Pollution and Its Dynamic Source-Sink Pattern in the Pearl River Estuary (South China)

Nutrient Pollution and Its Dynamic Source-Sink Pattern in the Pearl River Estuary (South China)

Optic–acoustic Analysis of Fish Assemblages at Petroleum Platforms

Reconstructing primary production in a changing estuary: A mass balance modeling approach

Contact Info

Product

Resources

About