Biomass and shoot production of Carex rostrata and Equisetum fluviatile in unfertilized and fertilized subarctic lakes

Solander, Doris

doi:10.1016/0304-3770(83)90003-7

Cited by 23 publications

(5 citation statements)

References 12 publications

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“…Extra N uptake always resulted in extra growth, and no luxury consumption of N took place. All P fertilizations, however, resulted in higher P uptake, regardless of responses of plant growth, as is commonly found in similar experiments with P fertilization (Solander 1983). A higher K uptake occurred in most K treatments, although not always statistically significant.…”

Section: Discussionmentioning

confidence: 61%

Control of plant growth by nitrogen and phosphorus in mesotrophic fens

1991

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Abstract. A fertilization experiment was carried out in 3 mesotrophic fens to investigate whether plant growth in these systems is controlled by the availability of N, P or K. The fens are located in an area with high N inputs from precipitation. They are annually mown in the summer to prevent succession to woodland. Above-ground plant biomass increased significantly upon N fertilization in the two 'mid'-succession fens studied. In the 'late'-succession fen that had been mown for at least 60 years, however, plant biomass increased significantly upon P fertilization. The mowing regime depletes the P pool in the soil, while it keeps N inputs and outputs in balance. A long-term shift occurs from limitation of plant production by N toward limitation by P. Hence, mowing is a suitable management tool to conserve the mesothrophic character of the fens.

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Section: Discussionmentioning

confidence: 61%

Control of plant growth by nitrogen and phosphorus in mesotrophic fens

1991

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“…EPA 2002). In particular P enrichment experiments commonly show that P content of plant tissue increases with P availability, regardless of the plant growth response (Solander 1983;Verhoeven and Schmitz 1991;Craft and others 1995). Increased P availability creates the possibility of luxury uptake, meaning that P is stored in vacuoles so that it can be used later (Davis 1991).…”

Section: Patterns In Nutrients Hydrology and Hydrochemistrymentioning

confidence: 99%

Regular Surface Patterning of Peatlands: Confronting Theory with Field Data

Eppinga

Rietkerk

Borren³

et al. 2008

Ecosystems

122

142

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Regular spatial patterns of sharply bounded ridges and hollows are frequently observed in peatlands and ask for an explanation in terms of underlying structuring processes. Simulation models suggest that spatial regularity of peatland patterns could be driven by an evapotranspiration-induced scale-dependent feedback (locally positive, longer-range negative) between ridge vegetation and nutrient availability. The sharp boundaries between ridges and hollows could be induced by a positive feedback between net rate of peat formation and acrotelm thickness. Theory also predicts how scale-dependent and positive feedbacks drive underlying patterns in nutrients, hydrology, and hydrochemistry, but these predictions have not yet been tested empirically. The aim of this study was to provide an empirical test for the theoretical predictions; therefore, we measured underlying patterns in nutrients, hydrology, and hydrochemistry across a maze-patterned peatland in the Great Vasyugan Bog, Siberia. The field data corroborated predicted patterns as induced by scaledependent feedback; nutrient concentrations were higher on ridges than in hollows. Moreover, diurnal dynamics in water table level clearly corresponded to evapotranspiration and showed that water levels in two ridges were lower than in the hollow in between. Also, the data on hydrochemistry suggested that evapotranspiration rates were higher on ridges. The bimodal frequency distribution in acrotelm thickness indicated sharp boundaries between ridges and hollows, supporting the occurrence of a positive feedback. Moreover, nutrient content in plant tissue was most strongly associated with acrotelm thickness, supporting the view that positive feedback further amplifies ridge-hollow differences in nutrient status. Our measurements are consistent with the hypothesis that the combination of scale-dependent and positive feedback induces peatland patterning.

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“…m-*, Solander 1983). This can be explained by the lower latitude and thus higher irradiance in Jiuzhaigou compared to the subarctic lakes in Sweden.…”

Section: Discussionmentioning

confidence: 95%

“…Ojala et al (2002) found that temperature increase had a positive effect on maximum biomass. Growth of individual shoots was regulated by summer temperature (Solander 1983). Thus, the much higher summer temperatures promote the biomass production of E. fluviatile in Jiuzhaigou more effectively compared to subarctic lakes.…”

Section: Discussionmentioning

confidence: 99%