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[ID: 322] Duration of fertilization effects into the next rotation period
PI: Marcus Larsson
Assessment of the present effect of fertilization in established stands in which a remaning effect of previous fertilization of the old forests could be detected in the new young stands on growth, vegetation, and nitrogen turnover on forest land. Examination of a number of young stands (n = 21) in Bispgården, were done between 2008 and 2015. The stands had all been established on clear-cuts were the previous stands had either been fertilized once (1985) or fertilized twice (1977 & 1985) or unfertilized. The stands were cut between 1997–2000, soil prepared and then planted. The results from the new stands have been presented in publications (Strengbom and Nordin, 2008, 2012; From, Strengbom and Nordin, 2015). The results showed a significant effects of fertilization into the next rotation period and in the new young stands.
[ID: 321] Pollinator activity
PI: Per-Ola Hedwall
Part of an experiment in which we will assess how forest structure and microclimate affects pollinator activity. We have three experimental forests in Sweden (in Vindeln, Siljan and Vivarp) and each of them have 40 plots in the middle of which there are temperature loggers. In 39 out of these 40 plots, we will set cameras to record pollinator activity. Since not all plots have flowers in them, we have developed fake plastic flowers to attract pollinators and towards which the cameras will point. These flowers are painted in bright colors and will provide a sugar reward to pollinators. To avoid ants infesting these flowers and bullying away our pollinators, such flowers will be placed on a tray partially filled with water. Besides adding fake flowers, we still need to record natural real flowers in each plot, since they can also attract pollinators. We will use 13 cameras per forest and these cameras along with fake flowers will be moved within the forest stand every 3-4 days, to avoid that pollinators learn where fake flowers are, and to cover as much forest as possible. The cameras will be moved according to a pre-set schedule, and each camera will be circulating among three plots. Additionally, we have also set some traps at the landscape level to record what pollinators are flying in the area. These traps are called pan traps and consist of a set of bowls (one yellow, one blue and one white) partially filled with salty water and some drops of soap. Insects feel attracted to such bright colors and drown in these traps. These traps need to be emptied from time to time, and water and soap replaced.
[ID: 320] Restored wetlands - Hotspots for methane emission and mercury methylation?
PI: Jacob Smeds
Wetlands are unique ecosystems delivering important ecosystem services to society. Due to extensive drainage only a minor fraction of the original wetland areas still remains in e.g. Europe. During the last decades, wetland restoration has become a prioritized environmental protection action in many European countries. Also the Swedish government has defined wetland restoration as major national undertaking, with numerous authorities and landowners actively involved. The major objectives behind wetland restoration are increased biodiversity, increased carbon sequestration, increased groundwater storage and improved surface water quality. However, wetland restoration also causes fundamental changes in biogeochemical properties and may result in undesired impacts and potential environmental threats. In addition, a century or more of drained conditions has drastically changed the soil properties in relation to natural wetlands and this is likely to profoundly influence the potential for various biogeochemical processes. This renders the impact of restoration on biogeochemical processes difficult to predict. Methane is the second most important green-house gas after carbon dioxide. Another process of grave concern is mercury (Hg) methylation. The overall aim of the project is to identify properties of rewetted wetlands that are critical for methane dynamics (including both production and consumption) and for the transformation of inorganic Hg to elemental gaseous Hg and the toxic MeHg molecule. We will the compare these properties and the associated biogeochemical pathways relative adjacent undisturbed natural wetlands. Understanding these biological systems will be fundamental for developing strategies to minimize emissions of the greenhouse gas methane and concentrations of methyl mercury in ground and surface waters of our landscape following wetland restoration.
[ID: 319] Soil investigations in trial 2291 Renberget
PI: Michael Gundale
Performing soil investigations in the long-term field trial 2291 Renberget
[ID: 318] Inventering av polygrafer i Småland (Linneuniversitetet, Kalmar)
PI: Anton Hubner
Med hjälp av kryssfällor med olika feromon behandlingar vill vi inventera närvaron av polygraphus poligraphus, P punctifrons och P. subopacus I Småland. Rapporter kring ökande densiteter i Norra Sverige vid skadegörelse av träd skapar ett behov över att kartlägga artenas utbredning.
Polygraferferomonpolygraphus poligraphusP punctifronsP. subopacus
[ID: 317] Whats the buzz with bilberries - Forest management effects on bilberry pollinator community structure and function in hemi boreal forests
PI: Jacob Björnberg
In this study, my aim is to investigate the differences in the structure of the european bluberry (V. myrtillus) pollinator communities under two contrasting forest management strategies in hemi-boreal forest stands in south-eastern Sweden. I will measure the abundance and species richness of wild pollinators in mature productive and old, natural forests and quantify the dominant pollinator species relative pollination effectiveness to set up a community network for these different types of forests.
[ID: 316] Preliminary study and analysis of available knowledge regarding damage risks in different forest management systems and associated economic comparisons
PI: Charlotta Erefur
It is of interest to investigate and evaluate the probability of different types of damage based on different forest management methods. This is to be able to weigh the risks, as well as any consequences of these methods when making economic comparisons. When including the risk of damage, the forest owner would receive a more complete background prior to the choice of management method. This feasibility study includes finding suitable researchers who can participate in the work and finding a way to tackle the problem.
[ID: 315] Spore monitoring at the experimental forests
PI: Åke Olson
Spore traps are installed in connection to the forest experimental forests and are being used for ongoing monitoring of existing and new airborne fungal spores. The operation is conducted in collaboration with the Department of Forest Mycology and Plant Pathology. The traps are located adjacent to the experimental forests climate monitoring stations to synergize the two programmes. This monitoring activity could be developed and expanded, but the question is where and how to collect spores to fulfil a wide array of research interests needs to be further investigated. A pilot study with varying trap placement and sample collection would be an important piece of the puzzle in developing our methods and this type of monitoring.
[ID: 314] The influence of forest management on insect diversity
PI: Adam Ekholm
Theory suggests that forest managed with selection systems should hold a more diverse community of insects and thereby also be less vulnerable to pest outbreaks, and in this project we will study the effect of forest management on insect diversity. We intend to place malaise and window traps in nine uneven-aged Picea abies stands that have been randomly subjected to one of three treatments.
[ID: 313] Pilot study on collecting Hylastes-beetles using pitfall traps, on new and 1 year old clearcuts
There are two primary purposes with this pilot study. 1) To develop the staffs general knowledge of Hylastes-beetles. 2) Using traps to survey the occurrence of Hylastes-beetles in two clear-cuts of different ages in order to get a broader picture of their occurrence within a defined geographical area, and to develop general knowledge on trapping strategies. Additionally, this will be a feasibility study on how to appropriately design a similar experiment on a larger scale.
[ID: 312] Test av mekaniska plantskydd. Uppdrag Organox.
PI: Stefan Eriksson
Test av mekaniska plantskydd mot snytbaggeskador. Uppdrag från Organox.