Nutrient and heavy metals in decaying harvest residue needles on drained blanket peat forests

Asam, Zaki-ul-Zaman; Nieminen, Mika; Kaila, Annu; Laiho, Raija; Sarkkola, Sakari; O’Connor, Mark; O’Driscoll, Connie; Sana, Afshan; Rodgers, M.; Zhan, Xinmin; Xiao, Liwen

doi:10.1007/s10342-014-0815-5

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…Mean Pb contents in current-year needles of Norway spruce and Scots pine measured on NFSI II plots are higher than Pb values measured in needles of lodgepole pine (Pinus contorta) and Sitka spruce (Picea sitchensis) in Western Ireland (0.15-0.17 mg Pb kg À1 DW) (Asam et al 2014) and in needles of silver fir (Abies alba) in the French Pyrenees (median AE SD, 0.2 AE 0.13 mg Pb kg À1 DW) and Vosges Mountains (mean AE SD, 0.33 AE 0.11 mg Pb kg À1 DW) (Gandois and Probst 2012;Gandois et al 2010). Since the two investigated sites in Western Ireland are located about 30 km from the Atlantic coast, with prevailing west winds, the low Pb values in conifer needles may be considered as background values.…”

Section: Effectiveness Of Air Quality Control Measures With Respect Tmentioning

confidence: 65%

Nutritional Status of Major Forest Tree Species in Germany

et al. 2019

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Section: Effectiveness Of Air Quality Control Measures With Respect Tmentioning

confidence: 65%

Nutritional Status of Major Forest Tree Species in Germany

et al. 2019

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“…Trees in peatland forests hold significant nutrients (Anderson et al., ), which can leach from felling brash (Asam et al., ). At our site, felled material was left on site; Ellenberg's N values suggested that high fertility might be slowing restoration.…”

Section: Discussionmentioning

confidence: 99%

Vegetation response to restoration management of a blanket bog damaged by drainage and afforestation

Hancock

Klein

Andersen

et al. 2018

Applied Vegetation Science

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Questions Does restoration management of a formerly afforested blanket bog lead to the vegetation, and the environmental conditions it indicates, becoming similar to intact bog? Location A 147‐ha blanket bog in Scotland's Flow Country, afforested in the 1980s but undergoing restoration since 1998. Methods Vegetation in the restoration area was surveyed in nine, 1.6–6.4‐ha plots, in 1998, 2003 and 2011. Each plot was matched to nearby plots that were either intact bog or remained afforested. Principal Response Curves were used to highlight the main axes of vegetation variation and test whether plant community trajectories in the restoration area differed from intact bog. The following restoration outcomes were assessed: floristic similarity to bog vegetation; and moisture, fertility and acidity, as inferred from vegetation using Ellenberg indicator values. Results In the 6 years after restoration began, vegetation developed towards bog‐like conditions. In the subsequent 8 years, overall vegetation change stalled, and spatial variability increased, reflecting diverging trajectories in wetter and drier parts of the site. Ellenberg's F‐values implied significant re‐wetting in the restoration area, reaching moisture levels similar to intact bog. Other restoration outcomes progressed in wetter microsites and areas (furrows and flat ground), but stalled in drier locations (plough‐ridges and steeper slopes). Conclusions Overall moisture conditions, as indicated by plants, have recovered. However, restoration progress has stalled in drier areas, where additional management may be needed. Long‐term vegetation monitoring has helped clarify barriers to recovery and the management needed to overcome them. The value of such monitoring schemes in guiding restoration should be reflected in their wider implementation, within an adaptive management framework.

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“…Similarly, seasonally increased stream water K and Mn (* twofold) occurred in our study following restoration. These are both known to be affected in streams impacted by conifer felling (Rosén et al 1996;Cummins and Farrell 2003b; Table 2), with Mn released from needles (Asam et al 2014a) and K from brash decomposition (Fahey et al 1991;Palviainen et al 2004a). Other work has found an even greater effect on K (* fourfold increase) than was observed here, with a decline seen after 2 years (Cummins and Farrell 2003b).…”

Section: Tablementioning

confidence: 46%

“…Furthermore, our univariate analyses, which controlled for upstream variation, confirmed that there was a significant concentration increase in restoration affected stream sites, post-restoration, by 4.4-fold (range 1.7-6.2). Significant increases in stream PO 4 3have also been found by others following forest felling, which has been directly related to the post-felling decomposition of tree biomass; the left over needles and branches (Cummins and Farrell 2003a;Kaila et al 2012;Asam et al 2014a;Shah and Nisbet 2019; Table 2).…”

Section: Effects Of Forest-to-bog Restoration On Water Chemistrymentioning

confidence: 55%

“…In the short-term, these interventions can impact local surface water chemistry (Wilson et al 2011;Finnegan et al 2014). Previous studies have found increased ditch and stream concentrations of dissolved organic carbon (DOC), aluminium (Al), potassium (K) and phosphorus (P) within close proximity to restoration management (Muller et al 2015), released through rewetting of peat (Fenner et al 2011;Kaila et al 2016) and decomposition of brash (i.e., tree tops and branches) and needles (Kaila et al 2012;Asam et al 2014a). Thus, the choice of harvesting method (selected depending on tree size, the timber quality/value, site accessibility to machinery and funding available e.g.…”

Section: Introductionmentioning

confidence: 99%

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Catchment water quality in the year preceding and immediately following restoration of a drained afforested blanket bog

et al. 2021

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The restoration of drained afforested peatlands, through drain blocking and tree removal, is increasing in response to peatland restoration targets and policy incentives. In the short term, these intensive restoration operations may affect receiving watercourses and the biota that depend upon them. This study assessed the immediate effect of ‘forest-to-bog’ restoration by measuring stream and river water quality for a 15 month period pre- and post-restoration, in the Flow Country peatlands of northern Scotland. We found that the chemistry of streams draining restoration areas differed from that of control streams following restoration, with phosphate concentrations significantly higher (1.7–6.2 fold, mean 4.4) in restoration streams compared to the pre-restoration period. This led to a decrease in the pass rate (from 100 to 75%) for the target “good” quality threshold (based on EU Water Framework Directive guidelines) in rivers in this immediate post-restoration period, when compared to unaffected river baseline sites (which fell from 100 to 90% post-restoration). While overall increases in turbidity, dissolved organic carbon, iron, potassium and manganese were not significant post-restoration, they exhibited an exaggerated seasonal cycle, peaking in summer months in restoration streams. We attribute these relatively limited, minor short-term impacts to the fact that relatively small percentages of the catchment area (3–23%), in our study catchments were felled, and that drain blocking and silt traps, put in place as part of restoration management, were likely effective in mitigating negative effects. Looking ahead, we suggest that future research should investigate longer term water quality effects and compare different ways of potentially controlling nutrient release.

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Nutrient and heavy metals in decaying harvest residue needles on drained blanket peat forests

Cited by 11 publications

References 41 publications

Nutritional Status of Major Forest Tree Species in Germany

Nutritional Status of Major Forest Tree Species in Germany

Vegetation response to restoration management of a blanket bog damaged by drainage and afforestation

Catchment water quality in the year preceding and immediately following restoration of a drained afforested blanket bog

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