Iron-rich dune grasslands: Relations between soil organic matter and sorption of Fe and P

Kooijman, A.M.; Lubbers, Ingrid M.; Til, M. van

doi:10.1016/j.envpol.2009.05.022

Cited by 11 publications

(20 citation statements)

References 39 publications

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“…Total P was determined after heating 1 g of ground soil sample at 500°C in order to digest organic matter (Westerman 1990, Kooijman et al 1998, 2009). Samples were subsequently extracted with 50 mL 0.5 mol/L H 2 SO 4 .…”

Section: Methodsmentioning

confidence: 99%

“…Besides being part of primary and secondary minerals, orthophosphate can also be sorbed to amorphous Fe and Al (hydr)oxides or complexes of Fe and Al with SOM, with Fe and Al acting as bridging agents (Walker and Syers 1976, Hamad et al 1992, Gerke 2010). The distinction between these forms of Fe (and Al) in the soil is important, as sorption of P to Fe oxides is stronger than to Fe‐OM complexes (Kooijman et al 2009, Gerke 2010), but it is unknown how they are influenced by pH and SOM. In acidic dunes, soils with low SOM were dominated by Fe oxides and soils with high SOM by Fe‐OM complexes (Kooijman et al 2009), but this has not yet been studied in calcareous dunes.…”

Section: Introductionmentioning

confidence: 99%

“…The distinction between these forms of Fe (and Al) in the soil is important, as sorption of P to Fe oxides is stronger than to Fe‐OM complexes (Kooijman et al 2009, Gerke 2010), but it is unknown how they are influenced by pH and SOM. In acidic dunes, soils with low SOM were dominated by Fe oxides and soils with high SOM by Fe‐OM complexes (Kooijman et al 2009), but this has not yet been studied in calcareous dunes. Phosphorus can also be organic, due to uptake by plant roots and microorganisms (Turner et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Resilience in coastal dune grasslands: pH and soil organic matter effects on P nutrition, plant strategies, and soil communities

et al. 2020

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2020. Resilience in coastal dune grasslands: pH and soil organic matter effects on P nutrition, plant strategies, and soil communities. Ecosphere 11(5):Abstract. Soil organic matter (SOM) and pH are key ecosystem drivers, influencing resilience to environmental change. We tested the separate effects of pH and SOM on nutrient availability, plant strategies, and soil community composition in calcareous and acidic Grey dunes (H2130) with low, intermediate, and/or high SOM, which differ in sensitivity to high atmospheric N deposition. Soil organic matter was mainly important for biomass parameters of plants, microbes, and soil animals, and for microarthropod diversity and network complexity. However, differences in pH led to fundamental differences in P availability and plant strategies, which overruled the normal soil community patterns, and influenced resilience to N deposition. In calcareous dunes with low grass-encroachment, P availability was low despite high amounts of inorganic P, due to low solubility of calcium phosphates and strong P sorption to Fe oxides at high pH. Calcareous dunes were dominated by low-competitive arbuscular mycorrhizal (AM) plants, which profit from mycorrhiza especially at low P. In acidic dunes with high grass-encroachment, P availability increased as calcium phosphates dissolved and P sorption weakened with the shift from Fe oxides to Fe-OM complexes. Weakly sorbed and colloidal P increased, and at least part of the sorbed P was organic. Acidic dunes were dominated by nonmycorrhizal (NM) plants, which increase P uptake through exudation of carboxylates and phosphatase enzymes, which release weakly sorbed P, and disintegrate labile organic P. The shifts in P availability and plant strategies also changed the soil community. Contrary to expectations, the bacterial pathway was more important in acidic than in calcareous dunes, possibly due to exudation of carboxylates and phosphatases by NM plants, which serve as bacterial food resource. Also, the fungal AM pathway was enhanced in calcareous dunes, and fungal feeders more abundant, due to the presence of AM fungi. The changes in soil communities in turn reduced expected differences in N cycling between calcareous and acidic dunes. Our results show that SOM and pH are important, but separate ecosystem drivers in Grey dunes. Differences in resilience to N deposition are mainly due to pH effects on P availability and plant strategies, which in turn overruled soil community patterns.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Resilience in coastal dune grasslands: pH and soil organic matter effects on P nutrition, plant strategies, and soil communities

et al. 2020

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“…Thus, mobilization and fixation of iron is pHdependent [2][3][4]. The availability and distribution of iron in soil is also attributed to soil organic matter as chelates are often formed with soil organic matter [5,6]. Furthermore, the presence of humic acid in the soil favors the formation of complexes of iron with organic matter at pH≥3 and iron is strongly adsorbed on the surface of organic matter [2,7,8].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Transfer of Iron in Soil–Plant–Animal Continuum Under Semi-arid Environmental Conditions in Sargodha, Pakistan

Khan

Ashraf

Mukhtār

et al. 2010

Biol Trace Elem Res

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The present investigation on the iron (Fe) transfer from soil to plant and in turn to animal (cows), as a function of sampling periods was conducted at the Livestock Experimental Station Sargodha, Pakistan which falls under semi-arid conditions. Although the iron transfer from soil to forage increased consistently, the forage Fe content decreased progressively with increase in sampling period. Highest Fe transfer from forage to cow blood plasma was observed during October and lowest during January. The transfer of Fe from forage to animal milk was maximum during the months of October and January and minimum during December. The transfer of Fe to plasma and milk was found to be dependent variably on the growth stage of forage in this investigation. Based on the findings of the present study, it is evident that mineral supplementation with higher Fe availability is urgently warranted to the animals particularly during the months of December and January to enhance plasma Fe in the cows being reared at that livestock farm during the entire grazing period. Thus, obligatory supplementation of Fe to the ruminants is highly recommended. Since the processes involved in iron management system in humans, animals, and plants are basically similar, appropriate elemental management must be provided to the living organisms, otherwise deficient or excessive levels of iron may deteriorate the developing cells of the organisms.

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“…P is a major plant nutrient and, like N, affected by cycling of organic matter and soil chemical conditions (Kooijman et al 1998;Kooijman et al 2009). Base cations (Ca 2+ , K + , Mg 2+ and Na + ) are also important, as they may selectively be taken up by the vegetation (Moszynska 1991;Smit et al 2002) and decrease with the drop in pH during succession.…”

Section: Introductionmentioning

confidence: 99%

Effects of nitrogen deposition on soil and vegetation in primary succession stages in inland drift sands

2011

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Background and aims Primary succession was studied in acid inland drift sands. Main research questions were: 1) How do vegetation and soil change during succession? 2) How are soil parameters and species abundance affected by atmospheric nitrogen deposition? Methods One hundred sixty-five plots were selected in 21 drift sands throughout The Netherlands, divided over eight succession stages from bare sand to dry heath and within a gradient in nitrogen deposition. Vegetation development and soil parameters were described and water-extractable elements measured and differences between high (>30 kg N ha −1 year −1 ) and lower nitrogen deposition sites calculated.Results Vegetation cover and height increased during succession. Lichens contributed most to plant species diversity. Thickness of A h horizon increased and pH decreased and concentrations of Fe, Al, S increased. Base cations increased as well, despite the drop in pH. Also, water-extractable ammonium, nitrate and phosphate increased, along with the NH 4 :NO 3 ratio. Sites with high nitrogen deposition had higher NH 4 :NO 3 and Al:Ca ratios, lower pH, higher cover of algae, lower lichen and total species diversity, more Pinus sylvestris seedlings and more species of late succession stages.Conclusions Drift sand succession seems to be mainly driven by an increase in organic matter, but is accelerated by nitrogen deposition.

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Iron-rich dune grasslands: Relations between soil organic matter and sorption of Fe and P

Cited by 11 publications

References 39 publications

Resilience in coastal dune grasslands: pH and soil organic matter effects on P nutrition, plant strategies, and soil communities

Resilience in coastal dune grasslands: pH and soil organic matter effects on P nutrition, plant strategies, and soil communities

A Study on the Transfer of Iron in Soil–Plant–Animal Continuum Under Semi-arid Environmental Conditions in Sargodha, Pakistan

Effects of nitrogen deposition on soil and vegetation in primary succession stages in inland drift sands

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