Search results for "metsänhoito"

Increasing temperature and productivity change biomass, trophic pyramids and community‐level omega‐3 fatty acid content in subarctic lake food webs

2021

Climate change in the Arctic is outpacing the global average and land-use is intensifying due to exploitation of previously inaccessible or unprofitable natural resources. A comprehensive understanding of how the joint effects of changing climate and productivity modify lake food web structure, biomass, trophic pyramid shape and abundance of physiologically essential biomolecules (omega-3 fatty acids) in the biotic community is lacking. We conducted a space-for-time study in 20 subarctic lakes spanning a climatic (+3.2 degrees C and precipitation: +30%) and chemical (dissolved organic carbon: +10 mg/L, total phosphorus: +45 mu g/L and total nitrogen: +1,000 mu g/L) gradient to test how temp…

Metsää omistavien kuolinpesien osakkaiden suhtautuminen metsäänsä ja metsätilansa tulevaisuuteen

2017

Tutkimuksen tavoitteena oli selvittää, miten metsää omistavat kuolinpesät suhtautuvat metsäänsä (tutkimuskysymys 1) ja millaisena metsää omistavat kuolinpesät näkevät metsätilansa tulevaisuuden (tutkimuskysymys 2). Aineistona olivat kahdeksan kaakkoissuomalaisen met- sää omistavan kuolinpesän osakkaan teemahaastattelut. Tutkimusaineisto oli laadullinen, ja sitä analysoitiin sisällönanalyysilla. Tutkimuksen taustalla vaikutti nykyisen hallituksen ohjelmaan sisältyvä tavoite nopeuttaa metsää omistavien kuolinpesien elinkaarta. Tutkimuksen kehyksenä olivat metsäpolitiikan ohjauskeinot, lainsäädännölliset ja normatiiviset keinot, informaatioon perustuvat keinot sekä taloudelliset keinot. Ensimm…

Metsäsertifioinnin ekotehokkuus

2006

Suomen metsät tarvitsevat toimivia monimuotoisuuskarttoja ja menetelmät päivityksiä – Vastine Kankaalle ja Mehtätalolle

2021

Management of boreal forest landscape for plant species richness and timber revenues

2014

Improving Economic Management Decisions in Forestry with the SorSim Assortment Model

2020

The sustainable supply of timber is one of the most important forest ecosystem services and a decisive factor determining the long-term profitability of forest enterprises. If timber production is to be economically viable, there must always be a way to analyse forest stands and trees felled for exploitation with regard to the wood assortments they contain. Only then can the expected timber yields, achieved by various silvicultural strategies or actions and different sorting options, be quantified with sufficient accuracy. The SorSim assortment simulator was developed for forest practitioners and forest scientists in Switzerland to realistically simulate the sorting of individual trees and …

Optimizing management to enhance multifunctionality in a boreal forest landscape

2017

The boreal biome, representing approximately one-third of remaining global forests, provides a number of crucial ecosystem services. A particular challenge in forest ecosystems is to reconcile demand for an increased timber production with provisioning of other ecosystem services and biodiversity. However, there is still little knowledge about how forest management could help solve this challenge. Hence, studies that investigate how to manage forests to reduce trade-offs between ecosystem services and biodiversity are urgently needed to help forest owners and policy makers take informed decisions. We applied seven alternative forest management regimes using a forest growth simulator in a la…

Teeren (Tetrao tetrix) pienpoikasajan elinympäristöt ja poikasravinnoksi tarjolla olevan selkärangatonfaunan määrä ja laatu keskisuomalaisissa talous…

2007

Dispersal ecology of deadwood organisms and connectivity conservation

2018

Limited knowledge of dispersal for most organisms hampers effective connectivity conservation in fragmented landscapes. In forest ecosystems, deadwood‐dependent organisms (i.e., saproxylics) are negatively affected by forest management and degradation globally. We reviewed empirically established dispersal ecology of saproxylic insects and fungi. We focused on direct studies (e.g., mark‐recapture, radiotelemetry), field experiments, and population genetic analyses. We found 2 somewhat opposite results. Based on direct methods and experiments, dispersal is limited to within a few kilometers, whereas genetic studies showed little genetic structure over tens of kilometers, which indicates long…

Using uncertain preferential information from stakeholders to assess the acceptability of alternative forest management plans

2017

In forest management planning, participatory planning processes are often encouraged as a means to acquire relevant information and to enhance the stakeholders' acceptability of alternative plans. This requires the aggregation of the stakeholders' preferences that can be done in a wide variety of manners. The aggregation process strives to reduce the information into a single set of preferences that simplifies the information and allows for the use of discrete decision support tools. Depending on how the preferences are aggregated, a wide range of plan rankings can emerge. Although this range of ranking complicates the issue of plan selection, it does highlight the uncertainty involved in a…