Interactions between soil water conditions and forest stands in boreal forests with implications for ditch network maintenance

Sikström, Ulf; Hökkä, Hannu

doi:10.14214/sf.1416

Cited by 56 publications

(53 citation statements)

References 68 publications

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“…Extensive peatland areas throughout Fennoscandia have been drained, in more or less systematic ways, with the purpose to improve forest production (Päivänen and Hånell 2012;Sikström and Hökkä 2016). Area drained for peatland forestry has been positively correlated with TOC and DOC (Marttila et al 2018) and drained peatland forests have been shown to be significantly greater sources of DOC to receiving waters than undrained peatlands and upland forest soils (Rantakari et al 2010).…”

Section: Manipulating Hydrological Connectivitymentioning

confidence: 99%

Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures

Kritzberg

Hasselquist

Škerlep

et al. 2019

Ambio

215

142

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Browning of surface waters, as a result of increasing dissolved organic carbon and iron concentrations, is a widespread phenomenon with implications to the structure and function of aquatic ecosystems. In this article, we provide an overview of the consequences of browning in relation to ecosystem services, outline what the underlying drivers and mechanisms of browning are, and specifically focus on exploring potential mitigation measures to locally counteract browning. These topical concepts are discussed with a focus on Scandinavia, but are of relevance also to other regions. Browning is of environmental concern as it leads to, e.g., increasing costs and risks for drinking water production, and reduced fish production in lakes by limiting light penetration. While climate change, recovery from acidification, and land-use change are all likely factors contributing to the observed browning, managing the land use in the hydrologically connected parts of the landscape may be the most feasible way to counteract browning of natural waters.

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Section: Manipulating Hydrological Connectivitymentioning

confidence: 99%

Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures

Kritzberg

Hasselquist

Škerlep

et al. 2019

Ambio

215

142

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“…Drainage of wetlands is one of the most effective measures in increasing the forest productivity. According to Sikström and Hökkä (2016), productivity of Scots pine after drainage network maintenance (DNM) increases by up to approx. 40 m 3 ha -1 during 20 years, on condition that nutrients are not limiting tree growth.…”

Section: Introductionmentioning

confidence: 99%

The efficiency of forest drainage system sedimentation ponds in the context of water quality

Kalvite¹,

Lībieté²,

Kļaviņš³

2019

Research for Rural Development

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The establishment, maintenance and renovation of forest drainage systems are carried out to ensure the development of high quality forest stands and to secure access to forest resources, but it also poses a risk of erosion and increased discharge of suspended solids and nutrients associated with it. The aim of the study was to analyse the efficiency of standard-sized sedimentation ponds built by JSC 'Latvia's State Forests' for sediment and nutrient retention during and after drainage network maintenance. To assess the efficiency of standard-sized sedimentation ponds six study sites were established and various chemical and physical parameters were measured for three years to evaluate water quality and to estimate runoff of plant nutrients and suspended solids. Sampling was carried out before and during drainage network maintenance and during two years following it. Despite the fact that some effect in reducing suspended solid export from catchments was observed, the results revealed insufficient efficiency of the sedimentation ponds in retaining plant nutrients and eroded matter during and after the drainage network maintenance. Retention of N tot , N-NO 3 -, P-PO 4 3-, N-NH 4 + and DOC was ambiguous. It was concluded that other water protection structures should be considered or different parameters of sedimentation ponds should be used to improve the water quality exiting the drainage systems and entering waterbodies.

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“…Ditch network maintenance (cleaning the ditches or digging complementary ditches) aiming to ensure sufficient drainage is required after 20 years in the northern and after 25-30 years in the southern part of Finland (Hökkä et al 2000). Even though ditch network maintenance improves tree growth (Ahti 2005;Sikström and Hökkä 2016) it may impair water quality in receiving water courses, in addition of being a cost for the land owner, too. Therefore, unnecessary maintenance of ditch network should be avoided if it does not result in higher growth (Hökkä and Laurén 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, unnecessary maintenance of ditch network should be avoided if it does not result in higher growth (Hökkä and Laurén 2014). Sikström and Hökkä (2016) pointed out that better understanding is needed of the relation between soil water and tree growth for the justification of ditch network maintenance.…”

Section: Introductionmentioning

confidence: 99%

Effect of waterlogging on boreal forest tree seedlings during dormancy and early growing season

Wang¹

2017

Diss. For.

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More precipitation in the form of rain in winter together with deteriorated ditch networks may expose drained peatland forestry to winter or spring waterlogging in boreal forests. The response of main boreal forest species on soil waterlogging is important for predicting forest productivity and justifying the demand for ditch network maintenance. In this study, the aim was to find out the physiological and growth responses of 1-year-old Norway spruce (Picea abies (L.) Karst.), silver birch (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings subjected to one-month waterlogging at the end of the dormancy phase, and to find out the morphology, physiology and growth of silver birch and pubescent birch seedlings subjected to one-month waterlogging at the beginning of the growing season.Two experiments were carried out in growth chambers. In experiment 1, Norway spruce seedlings were subjected to either no waterlogging or waterlogging for one month at 2 o C, after which a six-week follow-up growing season allowed the seedlings to recover. In experiment 2, silver birch and pubescent birch seedlings went through a four-week dormancy (weeks 1-4), a four-week early growing season (weeks 5-8), and a four-week late growing season (weeks 9-12). The treatments were 1) no waterlogging throughout the experiment (NW); 2) four-week waterlogging during dormancy (Dormancy waterlogging, DW); 3) four-week waterlogging during the early growing season (Growth waterlogging, GW); and 4) four-week dormancy waterlogging followed by four-week growth waterlogging during the early growing season (DWGW).Dormancy waterlogging reduced root volume and increased root mortality, but did not affect dark-acclimated chlorophyll fluorescence (F v /F m ) or the biomass of leaves, stems and roots in Norway spruce. Root biomass and root hydraulic conductance (K r ) of silver birch was reduced but aboveground organs were not affected by dormancy waterlogging. On the contrary, in pubescent birch root morphology, biomass and K r were not affected, but gas exchange was reduced by dormancy waterlogging. However, the biomass of leaves and stems was not negatively affected in pubescent birch. In conclusion, these tree species can tolerate a one-month winter waterlogging well.Growth waterlogging led to the reduction of stomatal conductance (g s ), and thus the reduction of light-saturated photosynthesis rate (A max ) in both birch species, although recovery was seen during the follow-up growing season. It also led to lower leaf area in both birch species. Growth waterlogging led also to decreased the K, Ca, Mg, Mn and B contents of leaves in silver birch, whereas in pubescent birch only Ca and Mg contents were decreased. In pubescent birch, fine cluster roots, the incidence of non-glandular trichomes, and stem lenticels were increased by growth waterlogging. However, silver birch did not show such acclimation to waterlogging. In conclusion, growth waterlogging caused more negative effects to both birch species than dormancy waterl...

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Interactions between soil water conditions and forest stands in boreal forests with implications for ditch network maintenance

Cited by 56 publications

References 68 publications

Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures

Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures

The efficiency of forest drainage system sedimentation ponds in the context of water quality

Effect of waterlogging on boreal forest tree seedlings during dormancy and early growing season

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