Detection of extracellular phosphatases in natural spring phytoplankton of a shallow eutrophic lake (Donghu, China)

Cao, Xiuyun; Štrojsová, Alena; Znachor, Petr; Zapomělová, Eliška; Liu, Guoxiang; Vrba, Jaroslav; Zhou, Yiyong

doi:10.1080/09670260500192760

Cited by 39 publications

(34 citation statements)

References 35 publications

(44 reference statements)

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“…Sediments are consisted of finely divided clays, mineral and organic matter in central sites while sand, stones, and relatively coarse materials (leaves, detritus) are typical substrates in littoral. Huang, 1996;Li et al, 1996;Cao et al, 2005;Jiang and Shen, 2006 and our data).…”

Section: > Study Sitementioning

confidence: 98%

“…Tableau I Caractéristiques chimiques du lac Donghu (selon Huang, 1996 ;Li et al, 1996 ;Cao et al, 2005 …”

Section: > Study Siteunclassified

“…In comparison, a large part of phosphorus originated from the external sources enters aquatic system in a particulate form poorly available to producers (algae). When ambient available phosphorus is scarce, bacterio-and phytoplankton can produce extracellular alkaline phosphotase to hydrolyze organic phosphorus for compensation of its deficiency (Feuillade et al, 1990;Spijkerman and Coesel, 1998;Gillor et al, 2002;Cao et al, 2005). Also, it had been showed that some aquatic animals affect the activity of the alkaline phosphotase (Vrba and Machacek, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus flux by macrobenthic invertebrates in a shallow eutrophic lake Donghu: spatial change

Berezina

Голубков

et al. 2011

Knowl. Managt. Aquatic Ecosyst.

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We estimated phosphorus flux mediated by benthic invertebrates from the sediments to the water in a shallow eutrophic lake (lake Donghu, central China) and quantified spatial (littoral and central sites) and specific (among different benthic taxa) differences. The mass-specific excretion rates of phosphorus (soluble reactive phosphorus (SRP, ηmol·mg dry mass -1 ·h -1 ) by benthic invertebrates (abundant taxa) were estimated experimentally and calculated as a final minus of initial nutrient mass divided by dry mass of organisms. Results showed high importance of chironomid larvae as a contributor to the total P flux from sediments to water in shallow lake Donghu. Benthic biomass (from 0.002 to 32.8 g dry mass·m -2 ) distribution and species composition (31 taxa) were studied (October 2009) in three regions of lake Donghu (Guozhenghu, Miaohu, Yujiahu) using samples from three depths: the shallow littoral site (0.2-1 m depth), central site with 2 m depth, and central site with more than 3 m depth. The total estimated SRP excretion by benthic invertebrate reaches 36% of the direct SPR flux from sediments to water in this lake. The phosphorus regeneration by benthic animals is the most intensive in the shallow littoral sites (69.5 µmol P·m -2 ·day -1 ) and at least 20 times greater than in central sites (3.4 µmol P·m -2 ·day -1 ) of lake Donghu. The results support notable differences in the SRP excretion rates between taxa and sites. The spatial difference in the SRP flux might be considered as a general feature of lakes with periodical changing oxygen near bottom. RÉSUMÉFlux de phosphore dû aux invertébrés macrobenthiques dans un lac peu profond et eutrophe, le lac Donghu.Nous avons estimé le flux de phosphore des sédiments vers l'eau créé par les invertébrés benthiques dans un lac peu profond eutrophe (lac Donghu, centre de la Chine) et quantifié les différences spatiales (sites du littoral et du centre) et spéci-fiques (entre différents taxons benthiques). Les taux d'excrétion du phosphore (phosphore réactif soluble : SRP, ηmol·mg de masse sèche -1 ·h -1 ) par les invertébrés Mots-clés :phosphore, excrétion, zoobenthos, Knowledge and Management of Aquatic Ecosystems (2011) 402, 11 © ONEMA, 2011 http://www.kmae-journal.org DOI: 10.1051/kmae/2011073 L. Ji et al.: Knowl. Managt. Aquatic Ecosyst. (2011 11p2 benthiques (taxons abondants) ont été estimés expérimentalement et calculés comme la différence entre masses de nutriment finale et initiale divisée par la masse sèche des organismes. Les résultats ont montré une grande importance des larves de chironomides en tant que contributeurs au flux de P total de sédiments vers l'eau dans le lac peu profond Donghu. La distribution de la biomasse benthique (de 0,002 à 32,8 g de matière sèche·m -2 ) et sa composition spécifique (31 taxons) ont été étudiées (octobre 2009) dans trois régions du lac Donghu (Guozhenghu, Miaohu, Yujiahu) en utilisant des échantillons provenant de trois profondeurs : le site peu profond du littoral (0,2-1 m de profondeur), le site c...

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Section: > Study Sitementioning

confidence: 98%

“…Tableau I Caractéristiques chimiques du lac Donghu (selon Huang, 1996 ;Li et al, 1996 ;Cao et al, 2005 …”

Section: > Study Siteunclassified

Section: Introductionmentioning

confidence: 99%

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Phosphorus flux by macrobenthic invertebrates in a shallow eutrophic lake Donghu: spatial change

Berezina

Голубков

et al. 2011

Knowl. Managt. Aquatic Ecosyst.

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“…13 P. obtusum Lucks Bakaya river bank and fish pond at Hetauda, Makawanpur (Sahay et al, 1992 (Hickel, 1973); Fish pond at Hetauda, Makawanpur (Sahay et al, 1992); Municipal drain near Bus Stand, Narayanghat, Chitwan (Das and Verma, 1996); China (Cao et al, 2005;Hu and Wei, 2006), India (Arulmurugan et al, 2010), Singapore (Pham et al, 2011), Taiwan (Yamamoto and Shiah, 2012 Distribution: Nepal -Fish pond at Hetauda, Makawanpur (Sahay et al, 1992); Pond near Mahendranagar Bazar, Kanchanpur (Chaturvedi and Habib, 1996); China (Hu and Wei, 2006), India (Biswas, 1949), Singapore (Pham et al, 2011), Taiwan (Anon., 2012).…”

Section: Introductionmentioning

confidence: 99%

“…11 (Hickel, 1973); India (Philipose, 1967). D : Nepal -Phewa lake, 967 m, Kaski (Hickel, 1973); Pakistan (Mehwish and Aliya, 2005), China (Cao et al, 2005), India (Philipose, 1967), Singapore (Pham et al, 2011), Taiwan (Anon., 2012).…”

Section: Introductionmentioning

confidence: 99%

Taxonomy and Diversity of Genus Pediastrum Meyen (Chlorophyceae, Algae) in East Nepal

Rai¹,

Misra²

2013

Our Nature

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Pediastrum Meyen is a green algae occurs frequently in lentic environment like pond, puddles, lakes etc. mostly in warm and humid terai region. Twenty taxa of Pediasturm have been reported from Nepal, mostly from central and western part of the country, hitherto. Among them, in the present study, ten taxa of Pediastrum are enumerated also from east Nepal. Taxonomy and diversity of each taxa have been described with photomicrography.

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Light Availability May Control Extracellular Phosphatase Production in Turbid Environments

et al. 2014

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Extracellular phosphatase production by phytoplankton was investigated in the moderately eutrophic Lipno reservoir, Czech Republic during 2009 and 2010. We hypothesized that production of extracellular phosphatases is an additional mechanism of phosphorus acquisition enabling producers to survive rather than to dominate the phytoplankton. Hence, we examined the relationship between light availability and phosphatase production, as light plays an important role in polymictic environments. Bulk phosphatase activity was measured using a common fluorometric assay, and the production of phosphatases was studied using the Fluorescently Labelled Enzyme Activity technique, which enabled direct microscopic detection of phosphatase-positive cells. In total, 29 taxa of phytoplankton were identified during both years. Only 17 taxa from the total number of 29 showed production of extracellular phosphatases. Species dominating the phytoplankton rarely produced extracellular phosphatases. In contrast, taxa exhibiting phosphatase activity were present in low biomass in the phytoplankton assemblage. Moreover, there was a significant relationship between the proportion of phosphatase positive species in samples and the Z(eu):Z(mix) ratio (a proxy of light availability). A laboratory experiment with different light intensities confirmed the influence of light on production of phosphatases. Our seasonal study confirmed that extracellular phosphatase production is common in low-abundance populations but not in dominant taxa of the phytoplankton. It also suggested the importance of sufficient light conditions for the production of extracellular phosphatases.

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Detection of extracellular phosphatases in natural spring phytoplankton of a shallow eutrophic lake (Donghu, China)

Cited by 39 publications

References 35 publications

Phosphorus flux by macrobenthic invertebrates in a shallow eutrophic lake Donghu: spatial change

Phosphorus flux by macrobenthic invertebrates in a shallow eutrophic lake Donghu: spatial change

Taxonomy and Diversity of Genus Pediastrum Meyen (Chlorophyceae, Algae) in East Nepal

Light Availability May Control Extracellular Phosphatase Production in Turbid Environments

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