Influence of Vegetational Structure on Capture of Salt and Nutrient Aerosols in a Maine Peatland

Schauffler, Molly; Jacobson, George L.; Pugh, Alexander L.; Norton, Stephen A.

doi:10.2307/2269569

Cited by 17 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The total uptake of K reached the predrainage level only after about 40 years following drainage. At this stage, the tree stand was already well developed and could thus itself affect the element balance of the site through the increased interception of (dry) deposition [ Schauffler et al , 1996]. This interception may be crucial for the K regime of forested peatland sites [ Laiho et al , 1999].…”

Section: Discussionmentioning

confidence: 99%

Dynamics of plant‐mediated organic matter and nutrient cycling following water‐level drawdown in boreal peatlands

Laiho¹,

Vasander

Penttilä³

et al. 2003

Global Biogeochemical Cycles

156

120

View full text Add to dashboard Cite

[1] If boreal peatlands face drought more often due to climatic warming, the responses of vegetation may drastically change the functions of the ecosystem. We assessed the effects of water-level drawdown on plant-mediated organic matter (OM) and nutrient fluxes in a chronosequence of undrained and drained, originally sparsely treed fens. The chronosequence mimicked the reduced growing season moisture predicted by current climate change scenarios. In a pristine state, OM and nutrient fluxes were characterized by annual cycling through graminoids and mosses. Water-level drawdown initiated a ''forest succession,'' in which the OM and nutrient cycles shifted from being dominated by graminoids and mosses to dominance by arboreal vegetation in two decades. Simultaneously, the quantity and tissue type composition of annual litterfall, as well as the quantity and allocation of annual nutrient uptake, changed radically. The changes may have contrasting but as yet unexplored implications for the carbon and nutrient balances of these sites.

show abstract

Section: Discussionmentioning

confidence: 99%

Dynamics of plant‐mediated organic matter and nutrient cycling following water‐level drawdown in boreal peatlands

Laiho¹,

Vasander

Penttilä³

et al. 2003

Global Biogeochemical Cycles

156

120

View full text Add to dashboard Cite

show abstract

“…2. The higher concentrations of Na in the restored section were probably a consequence of increase interception of the precipitations in comparison with the bare surface of the non-restored section (Schauffler et al 1996), where Na is more likely to be leached. More changes, particularly in the nutrient content of the peat, are likely to occur when new peat starts to form and accumulate.…”

Section: Changes In Peat Chemistry Over Timementioning

confidence: 90%

Peat, Water and Plant Tissue Chemistry Monitoring: A Seven-Year Case-Study in a Restored Peatland

2009

View full text Add to dashboard Cite

Following ecosystem-scale restoration of a postharvested bog in Eastern Canada, a long term monitoring program was set up. Peat, water and plant chemistry data were collected during 7 years in a restored peatland, an adjoining post-harvested non-restored peatland, and in a neighboring natural peatland to determine the potential of chemistry data for evaluating of restoration success over time. We used a multivariate Principal Response Curves (PRC) approach to study the temporal evolution of peat, water, and plant tissue chemistry. Nitrogen, iron, and sodium were the most responsive elements to restoration in the peat. Water chemistry was still different between natural and restored sections 7 years after restoration, but the difference was not constant over the growing season. The analyses of plant tissue chemistry provided useful information related to fundamental processes (nutrient retention/leaching, plant nutrition). Among other, it highlighted P deficiencies in the non-restored section, and nutrient replenishment in the restored plant tissues. P levels appear to be a good indicator of restoration success and should be used routinely in monitoring studies. Since the three plants species tested in this study displayed different responses to restoration, we also recommend targeting key species or functional groups for monitoring.

show abstract

“…Bulk precipitation did not, in fact, totally explain the cation contents in pore‐water on the ombrotrophic parts, which are probably due to the mire surface trapping droplets and solid particles more effectively than the funnels used for collecting bulk precipitation (see Oldfield et al . 1979; Schauffer et al . 1996).…”

Section: Discussionmentioning

confidence: 99%

“…The lower contribution of precipitation to Ca 2+ , Mg 2+ and Na + concentrations in mire pore-water in the minerotrophic parts compared with the ombrotrophic parts can be explained as a primary effect of mineral soil water inflows along the mire margins. Bulk precipitation did not, in fact, totally explain the cation contents in pore-water on the ombrotrophic parts, which are probably due to the mire surface trapping droplets and solid particles more effectively than the funnels used for collecting bulk precipitation (see Oldfield et al 1979;Schauffer et al 1996). Calcium was depleted in ombrotrophic pore-water at Wölfl Moor compared with precipitation very probably because of the greater cation exchange activity of living Sphagna, as indicated by the higher Ca concentration in ombrotrophic Sphagnum plants at the Italian mire (see below).…”

Section:         -mentioning

confidence: 99%

Effects of mineral and nutrient input on mire bio‐geochemistry in two geographical regions

2003

View full text Add to dashboard Cite

Summary 1We assessed the role of climatic conditions and the effects of different, long-term atmospheric depositions in controlling the mineral and nutrient contents in pore-water, surface peat and in living Sphagna at a boreo-nemoral mire in Sweden and an alpine mire in Italy. 2 The terrestrial contribution of Ca 2+ , Mg 2+ and in bulk precipitation was much greater at the Italian mire, in accordance with the different bedrock in the region and the higher level of atmospheric pollution. 3 At both mires, the contribution of bulk precipitation to the concentration of major ions in mire pore-water was much greater in the ombrotrophic than in the minerotrophic part, because of the raised morphology of the mires, which limited the inflow of mineral soil water to the margins. The only ions strongly depleted in mire pore-water compared with precipitation were K + , and and these were therefore limiting to plant growth. 4 Higher concentration in pore-water at the Swedish mire, which experienced lower atmospheric inputs of sulphate, was probably caused by oxidative processes during a long dry period in the summer before sampling. 5 Higher rates of , , as well as atmospheric inputs at the Italian mire were reflected in significantly higher N and, partly, S concentrations in ombrotrophic Sphagna. Higher concentration in pore-water at the Italian mire was associated with a lower N retention coefficient of the ombrotrophic Sphagnum plants, suggesting a reduced nitrogen filtering ability of the moss layer.

show abstract

Influence of Vegetational Structure on Capture of Salt and Nutrient Aerosols in a Maine Peatland

Cited by 17 publications

References 13 publications

Dynamics of plant‐mediated organic matter and nutrient cycling following water‐level drawdown in boreal peatlands

Dynamics of plant‐mediated organic matter and nutrient cycling following water‐level drawdown in boreal peatlands

Peat, Water and Plant Tissue Chemistry Monitoring: A Seven-Year Case-Study in a Restored Peatland

Effects of mineral and nutrient input on mire bio‐geochemistry in two geographical regions

Contact Info

Product

Resources

About