Bern, Switzerland
Bern, Switzerland

Time filter

Source Type

Putz M.,Eidgenossische Forschungsanstalt fur Wald | Schmid S.,Bundesamt fur Umwelt | Bernasconi A.,Pan Bern AG CH | Wolf B.,Arbeitsgemeinschaft fur Den Wald CH
Schweizerische Zeitschrift fur Forstwesen | Year: 2015

Since the mid-1990s the term "urban forestry" is used as an umbrella term for different activities in research and practice dealing with trees, forest and green space in cities and agglomerations. Though, urban forestry means more than just city forestry or forestry in urban areas. On the occasion of the 17th International Conference of the European Forum on Urban Forestry (EFUF) in Lausanne from June 3-7, 2014, challenges and trends of the debates around green cities and urban nature have been discussed. This article gives an overview over the debate and pursues three goals: 1) the term urban forestry is defined and conceptualized from different perspectives; 2) current trends and challenges as discussed at the EFUF conference are sketched out; 3) correspondingly, consequences for forest stakeholders in Switzerland are deduced. Forests in urban areas can not be managed with traditional forestry concepts only. An important precondition to successfully deal with the current challenges is intersectoral and interdisciplinary cooperation. Five fields of action are focused on: urban green strategies, management partnerships, crosssectoral monitoring, integrative research, training and education, and interdisciplinary networks to share experiences and transfer knowledge.

Schwitter R.,Fachstelle fur Gebirgswaldpflege | Sandri A.,Bundesamt fur Umwelt | Bebi P.,Eidgenossische Forschungsanstalt fur Wald | Wohlgemuth T.,Eidgenossische Forschungsanstalt fur Wald | Brang P.,Eidgenossische Forschungsanstalt fur Wald
Schweizerische Zeitschrift fur Forstwesen | Year: 2015

The winter storm "Vivian" in February 1990 took Swiss forestry by surprise due to its enormous extent. It gave cause for entirely new and challenging questions for scientists and practitioners. Twenty-four years after the storm, the Swiss mountain forest tending group assessed in the frame of two workshops forest succession and the evolution of the protective effect against natural hazards in several well-documented Vivian storm areas at elevations between 1,500 and 1,700 m a.s.l. in the cantons of St. Gallen and Grisons. The decision to salvage the damaged timber or to leave it in place depends primarily on how the risk of bark beetle infestations is assessed. Lying stems can transiently reduce the risk created by natural hazards and favor stand establishment, by reducing snow movements and by serving as nurse logs in the long term. On several areas among those studied, forest succession has progressed so far that the protective effect is nearly restored. However, in the majority of the areas, this is not yet the case even 24 years after the storm. The presence of regeneration in the pre-storm stand, so-called advance regeneration, considerably accelerates forest succession in a windthrow area. If advance regeneration is absent, planting can considerably fasten succession in comparison to natural regeneration, which establishes often slowly. In summary, it is concluded that on large windthrow areas at high elevation the potential of natural regeneration is limited and that a more varied combination of the different treatment options should be envisaged in the case of future windthrow events.

Walker D.A.,University of Alaska Fairbanks | Epstein H.E.,University of Virginia | Raynolds M.K.,University of Alaska Fairbanks | Kuss P.,University of Alaska Fairbanks | And 14 more authors.
Environmental Research Letters | Year: 2012

Satellite-based measurements of the normalized difference vegetation index (NDVI; an index of vegetation greenness and photosynthetic capacity) indicate that tundra environments are generally greening and becoming more productive as climates warm in the Arctic. The greening, however, varies and is even negative in some parts of the Arctic. To help interpret the space-based observations, the International Polar Year (IPY) Greening of the Arctic project conducted ground-based surveys along two >1500km transects that span all five Arctic bioclimate subzones. Here we summarize the climate, soil, vegetation, biomass, and spectral information collected from the North America Arctic transect (NAAT), which has a more continental climate, and the Eurasia Arctic transect (EAT), which has a more oceanic climate. The transects have broadly similar summer temperature regimes and overall vegetation physiognomy, but strong differences in precipitation, especially winter precipitation, soil texture and pH, disturbance regimes, and plant species composition and structure. The results indicate that summer warmth and NDVI increased more strongly along the more continental transect. © 2012 IOP Publishing Ltd.

Wegmuller U.,Gamma Remote Sensing | Strozzi T.,Gamma Remote Sensing | Delaloye R.,University of Fribourg | Raetzo H.,Bundesamt fur Umwelt
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2012

In the frame of the IGARSS 2012 special session on ENVISAT the landslide mapping activities in Switzerland using ENVISAT ASAR data are presented. Between 2005 and 2010 the building up of a well suited archive over the Swiss Alps was realized through programming of all IS2 mode data during the snow free period. In recent years DINSAR and PSI based landslide inventory and monitoring products started to play an important role in the updating of hazard maps. © 2012 IEEE.

Hauser A.,Bundesamt fur Umwelt | Ott W.,eConcept | Kaenzig J.,Bundesamt fur Umwelt | Scheuthle H.,Bundesamt fur Umwelt | And 3 more authors.
Natur und Landschaft | Year: 2011

A comprehensive environmental policy goes beyond protection against undesirable change, and dedicates itself to meeting important long-term needs of society. Ecosystems contribute to social welfare by providing a variety of goods and services. Naming and quantifying these welfare contributions enhances public acceptance of environmental policy measures and facilitates the target-oriented formulation of policies. The Swiss Federal Office for the Environment established an inventory of ecosystem goods and services that are particularly relevant for the region and that are documentable. The inventory contains pragmatic propositions for indicators to be used in national reporting. These indicators are intended to render visible the contribution of ecosystems to welfare systematically, and thus help to raise public awareness of the importance of ecosystems. At the same time they should help to give environmental aspects the necessary priority in political decisions.

Bernasconi A.,Pan Bern AG | Brang P.,Eidgenossische Forschungsanstalt WSL | Schneider O.,Bundesamt fur Umwelt
Schweizerische Zeitschrift fur Forstwesen | Year: 2014

The 170th Annual Assembly of the Swiss Forestry Society took place at Andermatt in August 2013 with the theme "300 years of sustainable management". About one hundred forestry professionals took part in a seminar to debate the lessons of the last three centuries of sustainability for forest management. This article summarises the seminar results and draws conclusions for forest management in the future. The participants recognised that the greatest shortcomings were in the economic and social spheres. Measures were proposed in the area of knowledge of sustainable management, understanding of the forest ecosystem and in payment for forest services. The greatest challenge is considered to be responding to societal contradictions.

Hess J.,Bundesamt fur Umwelt
Schweizerische Zeitschrift fur Forstwesen | Year: 2014

When assessing the situation of the Swiss forest, all its functions must be considered. One aspect stands out, however: Switzerland is losing valuable opportunities by harvesting a relatively low share of its wood production potential. This applies to climate change, prevention of natural catastrophes and biodiversity, as well as forest and wood economy. The Confederation supports the use of wood for construction and energy through its resources policy. To increase domestic added value, investment, cooperation between all stakeholders and improved framework conditions are all essential.

Loading Bundesamt fur Umwelt collaborators
Loading Bundesamt fur Umwelt collaborators