Enhancing generic ecological model for short-term prediction of Southern North Sea algal dynamics with remote sensing images

Li, Hong; Arias, Mijail; Blauw, Anouk; Los, Hans J.; Mynett, Arthur E.; Peters, Steef

doi:10.1016/j.ecolmodel.2010.06.020

Cited by 18 publications

(6 citation statements)

References 14 publications

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“…Tidal and wind-induced currents are the major driver for resuspension and subsequent horizontal transport, while biological processes, such as algae growth and bio-induced sediment stabilization (Black et al, 2002;Stal, 2003), interfere and thus shape the complex distribution of SPM in coastal and estuarine systems. Typically, SPMC and composition show cross-shore gradients (Tian et al, 2009;van der Lee et al, 2009;Li et al, 2010). In shallow waters near the coast, where turbulence and thus resuspension are high, SPMC consists of flocs that are mainly composed of mineral particles with high densities.…”

Section: Introductionmentioning

confidence: 99%

Maximum sinking velocities of suspended particulate matter in a coastal transition zone

et al. 2016

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Abstract. Marine coastal ecosystem functioning is crucially linked to the transport and fate of suspended particulate matter (SPM). Transport of SPM is controlled by, amongst other factors, sinking velocity w s . Since the w s of cohesive SPM aggregates varies significantly with size and composition of the mineral and organic origin, w s exhibits large spatial variability along gradients of turbulence, SPM concentration (SPMC) and SPM composition. In this study, we retrieved w s for the German Bight, North Sea, by combining measured vertical turbidity profiles with simulation results for turbulent eddy diffusivity. We analyzed w s with respect to modeled prevailing dissipation rates and found that mean w s were significantly enhanced around log 10 ( (m 2 s −3 )) ≈ −5.5. This region is typically found at water depths of approximately 15 to 20 m along cross-shore transects. Across this zone, SPMC declines towards the offshore waters and a change in particle composition occurs. This characterizes a transition zone with potentially enhanced vertical fluxes. Our findings contribute to the conceptual understanding of nutrient cycling in the coastal region which is as follows. Previous studies identified an estuarine circulation. Its residual landward-oriented bottom currents are loaded with SPM, particularly within the transition zone. This retains and traps fine sediments and particulate-bound nutrients in coastal waters where organic components of SPM become remineralized. Residual surface currents transport dissolved nutrients offshore, where they are again consumed by phytoplankton. Algae excrete extracellular polymeric substances which are known to mediate mineral aggregation and thus sedimentation. This probably takes place particularly in the transition zone and completes the coastal nutrient cycle. The efficiency of the transition zone for retention is thus suggested as an important mechanism that underlies the often observed nutrient gradients towards the coast.

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Section: Introductionmentioning

confidence: 99%

Maximum sinking velocities of suspended particulate matter in a coastal transition zone

et al. 2016

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“…In a case study in New York Harbor regions, Hellweger et al (2004) [35] found that the turbidity, determined from the Secchi depth, is correlated with the 30 m resolution Landsat TM red band reflectance (630-690nm). Li (2010) [36] used the concentration of suspended substance retrieved from Moderate Resolution Imaging Spectroradiometer (MERIS) images as the input of physical model and produced an ecological model for short-term prediction of Southern North Sea algal dynamics. Jiang et al (2011) [37] adopted algorithms with three types of inputs, including single band, spectra ratio of two bands and reflectance first-derivative, to estimate TSS in Qingshan Lake in China and found that the first-derivative input resulted in most estimation accuracy.…”

Section: The Significance Of Coral Reef Ecosystem and Its Degradationmentioning

confidence: 99%

Investigating Rainstorm Disturbance on Suspended Substance in Coastal Coral Reef Water Based on MODIS Imagery and Field Measurements

Chen¹

2018

EARTH

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From July 11-12, 2009, the tropical storm Soudeler swept the study area with a Level 8 wind and disturbed the suspended substance in this coastal area, which may have caused some fatal impact on the health condition of coral reef in Xuwen coral reef coast located in Leizhou Peninsula of South China. In order to evaluate the impact of extreme weather on coral reef, this study applied and validated a TSS model to map the TSS variation based on red and infrared spectral bands of MODIS data through one before-storm and two after-storm images after applying the atmospheric correction of in-water linear regression analysis. By mapping and comparing the changes of TSS values before-and after-tropical storm, this study found substantial increases of TSS concentrations as a mean value of 47.8 mg/L (~3.6 times of mean TSS value before rainstorm) in the area during the passage of tropical storm compared to those under no-storm condition. Besides, the TSS returned back to even lower values five days after the passage of tropical storm as a mean value of 3.6mg/L (~one quarter of mean TSS value (13.4 mg/L) before rainstorm). The conclusion was made that the TSS concentration in estuary and coastal areas under local rainstorm tends to return to a normal level faster (approximately 2.5 days) than under a hurricane [1] or tropical storm as discovered in this study (approximately 5 days). Compared to the less frequent and non-synoptic in-situ field sampling approach, the synoptic and frequent sampling facilitated by frequent remote sensing imagery of MODIS provides an improved assessment of TSS concentration and two-dimensional distribution patterns and is recommended to be used as a valuable tool for frequently monitoring coral reef water quality in coastal water bodies of China and other areas in the world if applicable.

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“…Chapter 5 -Analysis of the relationship between climate variables and gross primary production using data driven techniques | 75 have been applied for primary production (Anav et al, 2015;Belgrano et al, 2001;Scardi, 1996), carbon dioxide uptake and other carbon fluxes (Beer et al, 2010;Jung M et al, 2011;Papale and Valentini, 2003;Xiao et al, 2014), radar forecasting (Li et al, 2013). DDMs have been also used for algae growth (Chen and Mynett, 2006;Li et al, 2010;Recknagel et al, 1997;Scardi, 1996), classification of landscape types (Brown et al, 1998;Zhang et al, 2007), distribution of vegetation (Hilbert and Ostendorf, 2001;Linderman et al, 2004) and hydrologic modelling for climate change scenarios (Corzo et al, 2009;Elshorbagy et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ecohydrology of the Andes Páramo Region

Maldonado¹

2017

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Enhancing generic ecological model for short-term prediction of Southern North Sea algal dynamics with remote sensing images

Cited by 18 publications

References 14 publications

Maximum sinking velocities of suspended particulate matter in a coastal transition zone

Maximum sinking velocities of suspended particulate matter in a coastal transition zone

Investigating Rainstorm Disturbance on Suspended Substance in Coastal Coral Reef Water Based on MODIS Imagery and Field Measurements

Ecohydrology of the Andes Páramo Region

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