Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests

Ojanen, Paavo; Penttilä, Timo; Tolvanen, Anne; Hotanen, Juha‐Pekka; Saarimaa, Miia; Nousiainen, Hannu; Minkkinen, Kari

doi:10.1016/j.foreco.2018.10.015

Cited by 27 publications

(17 citation statements)

References 42 publications

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“…Also, nutrient leaching and GHG emissions may be decreased on peatlands by maintaining a high enough soil water table level. This could be done by using uneven-aged forestry (especially selective cuttings) on suitable sites, and by avoiding unnecessary ditch network maintenance (Ojanen et al 2019;Leppä et al 2020a, b;Finér et al 2020). This is necessary because a low soil water table will increase CO 2 emissions (Ojanen et al 2019), and N 2 O emissions, especially on fertile peatland sites (Minkkinen et al 2020).…”

Section: Climate-smart Forestry Strategies and Policy Measuresmentioning

confidence: 99%

“…This could be done by using uneven-aged forestry (especially selective cuttings) on suitable sites, and by avoiding unnecessary ditch network maintenance (Ojanen et al 2019;Leppä et al 2020a, b;Finér et al 2020). This is necessary because a low soil water table will increase CO 2 emissions (Ojanen et al 2019), and N 2 O emissions, especially on fertile peatland sites (Minkkinen et al 2020). On the other hand, CH 4 emissions may be notable on peatland sites with a high soil water table.…”

Section: Climate-smart Forestry Strategies and Policy Measuresmentioning

confidence: 99%

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Climate-Smart Forestry Case Study: Finland

Peltola

Heinonen

Kangas

et al. 2022

Forest Bioeconomy and Climate Change

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Finland is the most forested country in the EU – forests cover 74–86% of the land area, depending on the definition and source. Increasing carbon sequestration from the atmosphere, and by storing it in forests (trees and soil) will be one important part of the Finnish climate smart forestry strategy. However, just maximizing the carbon storage of forests may not be the best option in the long run, although it may provide the best climate-cooling benefits in the short term. This is because the increasing risks of large-scale natural disturbances may turn forests, at least partially, into carbon sources. The climate change adaptation and mitigation should therefore be considered simultaneously. Different adaptation and risk management actions will be needed in Finnish forests in the coming decades to increase forest resilience to multiple damage risks. This could be done, for example, by increasing the share of mixtures of conifers and broadleaves forests instead of monocultures. Yet, the CSF strategy should also include the production of wood-based products that act as long-term carbon storage and/or substitute for more GHG-emission-intensive materials and energy. Doing this in a way which also enhances biodiversity and sustainable provisioning of multiple ecosystem services, is a key. Moreover, increasing forest land – for example, by planting on abandoned or low-productivity agricultural land, especially on soils with a high peat content – would enhance climate change mitigation.

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Section: Climate-smart Forestry Strategies and Policy Measuresmentioning

confidence: 99%

Section: Climate-smart Forestry Strategies and Policy Measuresmentioning

confidence: 99%

Climate-Smart Forestry Case Study: Finland

Peltola

Heinonen

Kangas

et al. 2022

Forest Bioeconomy and Climate Change

View full text Add to dashboard Cite

show abstract

“…The approaches presented here can also be implemented to estimate hydrological fluxes and emissions from drained peatlands (Ojanen et al 2019) to guide future potential peatland restoration actions (Laine et al 2019). Our approach can be applied for any peat dominated catchment to identify existing ditch networks and to consider future actions.…”

Section: Can the Proposed Approaches Be Beneficial For Future Management Of Peat Dominated Catchments?mentioning

confidence: 99%

Development of Aerial Photos and LIDAR Data Approaches to Map Spatial and Temporal Evolution of Ditch Networks in Peat-Dominated Catchments

Bhattacharjee

Marttila

Haghighi

et al. 2021

J. Irrig. Drain Eng.

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Spatiotemporal information on historical peatland drainage is needed to relate past land use to observed changes in catchment hydrology. Comprehensive knowledge of historical development of peatland management is largely unknown at catchment scale. Aerial photos and LIDAR data enlarge the possibilities for identifying past peatland drainage patterns. Here, our objectives are: (1) to develop techniques for semi-automatically mapping the location of ditch networks in peat-dominated catchments by using aerial photos and LIDAR data, and (2) to generate time series of drainage networks. Our approaches provide open-access techniques to systematically map ditches in peatdominated catchments through time. We focused on the algorithm in such a way that we can identify the ditch networks from raw aerial images and LIDAR data based on the modification of multiple filters and number of threshold values. Such data are needed to relate spatiotemporal drainage patterns to observed changes in many northern rivers. We demonstrate our approach using data from the Simojoki river catchment (3160 km 2 ) in northern Finland. The catchment is dominated by forests and peatlands that were almost all drained after 1960. For two representative locations in cultivated peatland (downstream) and peatland forest (upstream) areas of the catchment; we found total ditch length density (km/km 2 ) estimated from aerial images and LIDAR data based on our proposed algorithm varied from 2% to 50% compared against the monitored ditch length available from National Land survey of Finland (NLSF) in 2018. A different pattern of source variation in ditch network density was also observed for whole catchment estimates and for available drained peatland database from Natural Resources Institute Finland (LUKE). Despite such differences no significant differences were found using the non-parametric Mann-Whitney U-test with 0.05 significance level based on the samples of pixel based identified ditches between (i) aerial images & NLSF vector files and (ii) LIDAR data & NLSF vector files.

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“…Boreal and temperate forests with drained organic soils may act either as a sink (e.g. Minkkinen and Laine 1998, Ojanen et al 2013, Lupiķis and Lazdiņš 2017, Ojanen et al 2019 or a source of C (e.g. Simola et al 2012, Pitkänen et al 2013, Hommeltenberg et al 2014) depending on the case, but the combinations of factors controlling this variation are still insufficiently understood (Laiho et al 2008).…”

Section: Net Ghg Emissions From Soilmentioning

confidence: 99%

Estimation of litter input in hemi-boreal forests with drained organic soils for improvement of GHG inventories

et al. 2021

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Assessments of net greenhouse gas (GHG) emissions in forest land with drained organic soils conducted within the scope of National GHG inventories requires reliable data on litter production and carbon (C) input to soil information. To estimate C input through tree above-ground litter, sampling of above-ground litter was done in 36 research sites in Latvia representing typical forests with drained organic soils in hemiboreal region. To estimate C input through tree below-ground litter and litter from ground vegetation, modelling approach based on literature review and data on characteristics of forest stands with drained organic soils in Latvia provided by National Forest Inventory (NFI) was used. The study highlighted dependence of C input to soil through litter production from the stand characteristics and thus significant differences in the C input with litter between young and middle age stands. The study also proves that drained organic soils in middle age forests dominated by Silver birch, Scots pine and Norway spruce may not be the source of net GHG emissions due to offset by C input through litter production. However, there is still high uncertainty of C input with tree below-ground litter and ground vegetation, particularly, mosses, herbs and grasses which may have crucial role in C balance in forests with drained organic soils. Key words: forests, drained organic soils, litter production, carbon input, National GHG inventory

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Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests

Cited by 27 publications

References 42 publications

Climate-Smart Forestry Case Study: Finland

Climate-Smart Forestry Case Study: Finland

Development of Aerial Photos and LIDAR Data Approaches to Map Spatial and Temporal Evolution of Ditch Networks in Peat-Dominated Catchments

Estimation of litter input in hemi-boreal forests with drained organic soils for improvement of GHG inventories

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