Ecological significance of alkaline phosphatase activity and phosphatase-hydrolyzed phosphorus in the northern part of Gamak Bay, Korea

Kwon, Hyeong Kyu; Oh, Seok Jin; Yang, Han–Soeb

doi:10.1016/j.marpolbul.2011.07.027

Cited by 26 publications

(18 citation statements)

References 34 publications

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“…8a). Thus, these results only partially support previous evidence for robust inverse correlations between APA and DRP (Labry et al, 2005;Kwon et al, 2011). Varying environmental condi- (Jin et al, 2006).…”

Section: Regulation Patterns Of Apacontrasting

confidence: 70%

“…Water samples were brought to the field laboratory station and filtered immediately after collection (usually within 10 min). Five mL HgCl 2 (final concentration of 100 mg L -1 ) was added to each sample to prevent microbial enzymatic activity (Kwon et al, 2011). Water samples were filtered through GF/F filters (0.45 μm pore size, Millipore Co., Billerica, MA, USA) under low vacuum pressure (<15 cm Hg) to minimize cell lysis.…”

Section: Nutrient Analysismentioning

confidence: 99%

“…For example, Gao et al (2006) found that APase can hydrolyze ~58% of total P in a shallow lake in China (Lake Taihu) and thereby compensate for the growth of algae. In N o n -c o m m e r c i a l u s e o n l y a study in Gamak Bay (Korea), Kwon et al (2011) found that APA and phosphatase hydrolyzed P supplemented DRP and thus contributed to the dominance of bloom species. However, bacteria are also important competitors for P and producers of APA.…”

Section: Introductionmentioning

confidence: 99%

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Presence and patterns of alkaline phosphatase activity and phosphorus cycling in natural riparian zones under changing nutrient conditions

et al. 2014

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Section: Regulation Patterns Of Apacontrasting

confidence: 70%

Section: Nutrient Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Presence and patterns of alkaline phosphatase activity and phosphorus cycling in natural riparian zones under changing nutrient conditions

et al. 2014

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“…Traditionally, dissolved inorganic phosphorus (DIP) and dissolved inorganic nitrogen (DIN) are examined to infer nutrient limitation based on the Redfield ratio (Kwon et al, 2011). The DIN : DIP ratios that we observed (Table 1; Fig.…”

Section: Nutrientsmentioning

confidence: 96%

Hidden thin layers of toxic diatoms in a coastal bay

Timmerman

McManus

Cheriton

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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ACKNOWLEDGEMENTSiii ABSTRACTHarmful algal blooms (HABs) can threaten animal and human health through the production of toxins such as domoic acid. These blooms have become more frequent and toxic over the last few decades. In this study, we investigate the role that nutrients play in a toxic, subsurface bloom of Pseudo-nitzschia in northeastern Monterey Bay, California.Profilers and towed instruments were deployed and laboratory analyses of discrete water samples were conducted to describe the physical and biogeochemical conditions of the sampling site and to characterize the bloom. The Pseudo-nitzschia bloom occurred within a well-defined subsurface layer, containing high levels of domoic acid. In situ images taken within the layer revealed diatom flocs -indicators of nutrient stress. Nutrient ratios and alkaline phosphatase activity, commonly used to determine the nutritional status of phytoplankton, suggest that the Pseudo-nitzschia cells were phosphate stressed, and we speculate that this physiological stress led to increased toxicity of the bloom.Understanding how frequently blooms such as these are characterized by nutrient stress could improve our ability to predict the occurrence of HABs. With increased anthropogenic input of nutrients, such blooms could occur more often and with greater degrees of toxicity in the future.iv

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“…In nature, DOP is diverse and complex because of its diverse source. DOP is supplied by the excretion of actively metabolizing microalgae and bacterial cells, sloppy feeding by zooplankton (Kwon et al, 2011;Paytan and McLaughlin, 2007) and by land runoff. Microbes can transform the bound/apatite form into soluble or dissolved inorganic phosphate by a wide spectrum of enzymes released into the environment (Ahmed and Shahab, 2011;Chandramohan, 1970, 1971;Dyhrman et al, 2007;Zhu et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Alkaline phosphatase activity at the southwest coast of India: A comparison of locations differently affected by upwelling

Mamatha

Malik

Varik

et al. 2015

Journal of Sea Research

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Ecological significance of alkaline phosphatase activity and phosphatase-hydrolyzed phosphorus in the northern part of Gamak Bay, Korea

Cited by 26 publications

References 34 publications

Presence and patterns of alkaline phosphatase activity and phosphorus cycling in natural riparian zones under changing nutrient conditions

Presence and patterns of alkaline phosphatase activity and phosphorus cycling in natural riparian zones under changing nutrient conditions

Hidden thin layers of toxic diatoms in a coastal bay

Alkaline phosphatase activity at the southwest coast of India: A comparison of locations differently affected by upwelling

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