Linking the physiology and ecology of Cochlodinium to better understand harmful algal bloom events: A comparative approach

Kudela, Raphael M.; Ryan, John P.; Blakely, Melissa D.; Lane, Jenny Q.; Peterson, Tawnya D.

doi:10.1016/j.hal.2007.12.016

Cited by 123 publications

(103 citation statements)

References 66 publications

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“…We have studied more red tide blooms, and we have repeatedly found intense blooms dominated by single species or a few species. Red tide blooms during the fall of 2004 and 2005 were dominated by the same three dinoflagellates of the genera Cochlodinium, Akashiwo, and Ceratium (Kudela et al 2007). We have also found red tide patches in nearshore waters of the bay frequently dominated by a single species of Ceratium.…”

Section: Discussionsupporting

confidence: 50%

Mapping phytoplankton in situ using a laser‐scattering sensor

Rienecker¹,

Ryan²,

Blum³

et al. 2008

Limnology & Ocean Methods

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Standard optical sensors such as backscattering instruments and chlorophyll fluorometers provide high spatial resolution with limited information about the particles within the sample. Methods involving the analysis of water samples, such as microscopic examination, flow cytometery, laboratory particle size analyzers, and HPLC analysis of pigments, provide low spatial resolution but produce high levels of information about the particles. Phytoplankton ecology studies would benefit from the ability to describe phytoplankton diversity at high spatial and temporal resolution. Of particular interest to detect and quantify are species that produce red tide and harmful algal bloom (HAB) events because of their significant impacts on human health, marine life, and fisheries (Hallegraeff 2003;Glibert et al. 2005;Kudela et al. 2005).Here we present methods for describing phytoplankton patchiness in situ by the application of a Laser In Situ Scattering and Transmissometry (LISST-100) instrument. The LISST-100 was originally designed and tested for sediment particles (Traykovski et al. 1999;Michelson and Pejrup 2001) and has been applied to studies of bacteria and phytoplankton populations in shallow (16 m) coastal waters and lakes (Serra 2001;Serra et al. 2002aSerra et al. , 2002b. In our application of the LISST to study coastal ocean phytoplankton populations, particle concentrations are lower than those of previous LISST applications. Therefore, we increased the sensitivity of our instrument by a factor of ten. We verified the LISST's ability to describe oceanic phytoplankton by comparing cell dimensions measured by the LISST with those measured using a microscope. These lab studies included cultures of dinoflagellates and diatoms, measured as monocultures and mixed cultures of different size classes.The field program consisted of a 5-week time-series study of phytoplankton ecology in Monterey Bay, California (Fig. 1). Intensive in situ measurements during this study detailed development of two phytoplankton blooms: (1) a bloom of pennate diatoms of the genus Pseudo-nitzschia, some of which are HAB species (Scholin et al. 2000), and (2) AbstractA primary limitation of phytoplankton ecology research is the difficulty of describing patchiness and distributions of different phytoplankton groups. Chlorophyll fluorescence and optical backscatter are useful measurements that provide information about phytoplankton, but these measurements do not allow distinction of phytoplankton taxa. Traditional phytoplankton identification methods (such as microscopy, HPLC analysis, and flow cytometry) are labor intensive and therefore can provide only very limited coverage and resolution. Through lab experiments we show that the Laser In Situ Scattering and Transmissometer (LISST-100) instrument can accurately quantify phytoplankton cell dimensions for some cell shapes. Pseudo-spherical dinoflagellates are described with a single peak in the particle size distribution (PSD) at the cross-sectional dimension of the cells. Pennate diatoms ...

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Section: Discussionsupporting

confidence: 50%

Mapping phytoplankton in situ using a laser‐scattering sensor

Rienecker¹,

Ryan²,

Blum³

et al. 2008

Limnology & Ocean Methods

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“…This signal indicates dense accumulations of phytoplankton near the surface [24]. Such dense "red tide" patches are most commonly observed during the warm, stratified fall season in this region of the bay [9,32,[35][36][37], and they have been linked to HAB effects [12]. Although at coarser spatial resolution, the MERIS satellite sensor also detected this distinct bloom patch in northern Monterey Bay on 26 October (Figure 8a).…”

Section: Fall 2011 Studymentioning

confidence: 91%

Application of the Hyperspectral Imager for the Coastal Ocean to Phytoplankton Ecology Studies in Monterey Bay, CA, USA

et al. 2014

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As a demonstrator for technologies for the next generation of ocean color sensors, the Hyperspectral Imager for the Coastal Ocean (HICO) provides enhanced spatial and spectral resolution that is required to understand optically complex aquatic environments. In this study we apply HICO, along with satellite remote sensing and in situ observations, to studies of phytoplankton ecology in a dynamic coastal upwelling environment-Monterey Bay, CA, USA. From a spring 2011 study, we examine HICO-detected spatial patterns in phytoplankton optical properties along an environmental gradient defined by upwelling flow patterns and along a temporal gradient of upwelling intensification. From a fall 2011 study, we use HICO's enhanced spatial and spectral resolution to distinguish a small-scale "red tide" bloom, and we examine bloom expansion and its supporting processes using other remote sensing and in situ data. From a spectacular HICO image of the Monterey Bay region acquired during fall of 2012, we present a suite of algorithm results for characterization of phytoplankton, and we examine the strengths, limitations, and distinctions of each algorithm in the context of the enhanced spatial and spectral resolution.

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“…Therefore, such a large release of ammonium, specifically in the fall, a time in which nutrients tend to be limited, can rapidly stimulate phytoplankton blooms in this area. The preferential stimulation of harmful algal blooms was a particular concern as anthropogenic nutrients have been shown to be a factor in the increased occurrence of these outbreaks (Anderson et al, 2002;Heisler et al, 2008;Kudela et al, 2008). The increased frequency and duration of phytoplankton blooms related to anthropogenic nutrient loading have also coincided with increased incidents of eutrophication of coastal waters over the last several decades (Howarth, 2008;Paerl and Piehler, 2008).…”

Section: Environmental Impacts Of the 2015 Htp Wastewater Diversionmentioning

confidence: 99%

Application of Landsat 8 for Monitoring Impacts of Wastewater Discharge on Coastal Water Quality

et al. 2017

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Linking the physiology and ecology of Cochlodinium to better understand harmful algal bloom events: A comparative approach

Cited by 123 publications

References 66 publications

Mapping phytoplankton in situ using a laser‐scattering sensor

Mapping phytoplankton in situ using a laser‐scattering sensor

Application of the Hyperspectral Imager for the Coastal Ocean to Phytoplankton Ecology Studies in Monterey Bay, CA, USA

Application of Landsat 8 for Monitoring Impacts of Wastewater Discharge on Coastal Water Quality

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