Water management and climate changes increases the phosphorus accumulation in the small shallow estuary of the Palmones River (southern Spain)

Clavero, Vicente; Izquierdo, Juan José; Palomo, Laura; Fernández, J. A.; Niell, F. Xavier

doi:10.1016/s0048-9697(99)00045-5

Cited by 26 publications

(18 citation statements)

References 24 publications

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“…The exchanges of nutrients between water and sediment are highly complex, involving interrelated chemical, biological, and physical processes [52, 53]. One of the most important ways in which submerged macrophytes influence lake structure and function is through modification of phosphorus cycling [54].…”

Section: Resultsmentioning

confidence: 99%

Effects of Environmental Factors on Nutrients Release at Sediment‐Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China

Hou

Lü

et al. 2013

The Scientific World Journal

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Surface sediment and water samples were collected from Daihai Lake to study the biogeochemical characteristics of nitrogen and phosphorus, to estimate the loads of these nutrients, and to assess their effects on water quality. The contents and spatial distributions of total phosphorus (TP), total nitrogen (TN), and different nitrogen forms in sediments were analyzed. The results showed that concentrations of TN and TP in surface sediments ranged from 0.27 to 1.78 g/kg and from 558.31 to 891.29 mg/kg, respectively. Ratios of C : N ranged between 8.2 and 12.1, which indicated that nitrogen accumulated came mainly from terrestrial source. Ratios of N : P in all sampling sites were below 10, which indicated that N was the limiting nutrient for algal growth in this lake. Effects of environment factors on the release of nitrogen and phosphorus in lake sediments were also determined; high pH values could encourage the release of nitrogen and phosphorus. Modified Carlson's trophic state index (TSIM) and comprehensive trophic state index (TSIC) were applied to ascertain the trophic classification of the studied lake, and the values of TSIM and TSIC ranged from 53.72 to 70.61 and from 47.73 to 53.67, respectively, which indicated that the Daihai Lake was in the stage of hypereutropher.

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Section: Resultsmentioning

confidence: 99%

Effects of Environmental Factors on Nutrients Release at Sediment‐Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China

Hou

Lü

et al. 2013

The Scientific World Journal

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“…(Palomo 2004). The hydrology of this estuary is well known after more than 20 years of time series studies performed to analyse the environmental changes (Clavero et al 1999).…”

Section: Methodsmentioning

confidence: 99%

Diversity of inorganic carbon acquisition mechanisms by intact microbial mats of Microcoleus chthonoplastes (Cyanobacteriae, Oscillatoriaceae)

Carrasco

Mercado

Niell

2008

Physiologia Plantarum

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The dissolved inorganic carbon (DIC) acquisition mechanisms were researched in intact microbial mats dominated by the cyanobacteria Microcoleus chthonoplastes Thuret, by determining the effect on photosynthesis of different inhibitors. The microbial mats exhibited high affinity for DIC at alkaline pH, with K(m(DIC)) values similar to the ones described for pure cultures of cyanobacteria and algae in which carbon concentrating mechanisms have been researched. Besides, the photosynthesis was non-sensitive to pH changes within the range of 5.6-9.6, indicating that HCO(3)(-) was the main DIC source used for photosynthesis. The M. chthonoplastes mats featured external and internal carbonic anhydrase (CA) activity as measured in intact cells and cell extracts, respectively. Acetazolamide (AZ, which slowly enters the cell and then inhibits mainly the external CA) and ethoxyzolamide (EZ, which inhibits both external and internal CA) reduced significantly the oxygen evolution rates, demonstrating that the CA was implied in the DIC acquisition. Vanadate inhibited photosynthesis by 60% although its application, when CA being inhibited (i.e. after applying AZ + EZ), did not produce any additional effect. It could indicate that ATPase-dependent HCO(3)(-) use occurred and also that this putative mechanism was coupled with CA-like activity at the plasma membrane. The involvement of Na(+)-dependent HCO(3)(-) transporters in DIC acquisition was also inferred as monensin and 4-4'-diisothiocyanatostibilene-2,2'-disulfonate (DIDS) reduced photosynthesis by 70%. DIDS produced a strong inhibitory effect even after application of AZ + EZ + vanadate, indicating that this mechanism was not related to CA activity. The microbial mats become subject to very unfavourable conditions for Rubisco carboxylation at their natural habitats (e.g. external pH of 10.5 and O(2) concentration doubled with respect to saturation concentration); therefore, this putative diversity of DIC acquisition mechanisms could ensure their growth under these extreme conditions.

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“…The main causes of these habitat losses are direct or indirect anthropogenic pressures that reduce water quality (Short and Wyllie-Echeverria, 1996;Ralph et al, 2006 and references therein). Anthropogenic activities have augmented coastal nutrients and toxic compounds loading, promoting eutrophication (Clavero et al, 1999;Cabaço et al, 2008), and direct toxic effects on seagrasses (Short and Wyllie-Echeverria, 1996;Brun et al, 2002, Macinnis-Ng andRalph, 2003). These disturbances can be persistent over time, as regular wastewater discharges (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of intertidal seagrass habitat fragmentation on turbulent diffusion and retention time of solutes

Lara¹,

Peralta²,

Alonso³

et al. 2012

Marine Pollution Bulletin

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Water management and climate changes increases the phosphorus accumulation in the small shallow estuary of the Palmones River (southern Spain)

Cited by 26 publications

References 24 publications

Effects of Environmental Factors on Nutrients Release at Sediment‐Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China

Effects of Environmental Factors on Nutrients Release at Sediment‐Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China

Diversity of inorganic carbon acquisition mechanisms by intact microbial mats of Microcoleus chthonoplastes (Cyanobacteriae, Oscillatoriaceae)

Effects of intertidal seagrass habitat fragmentation on turbulent diffusion and retention time of solutes

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