Biologist, 27 years experience in ecology in all its aspects, Sjef has worked for the Foundation for Applied Landscape Ecology  in Nijmegen, for the Research Institute for Forestry and Landscape (De Dorschkamp) as well as for the Nature Conservation Council. He has also held a senior position at the Information and Knowledge Centre for Nature management. He was co-founder and co-director of Vista Landscape and Urban design in Amsterdam. In 2006 he started ‘Planecologie’.


Environmental Impact Assessment Commission (MER or EIA),

Quality team of Spatial Planning Key Decision Room for the River (SKPD)

Quality team of Green Hart area

Technical Advisory Committee (TAC) Amsterdam


Landscape ecology,

Policy advise, Knowledge flora and fauna, Natura 2000                 

Designing with nature,

Methodology development,    

Project management

Education (Delft University of Technology)



COMPANY  Planecologie

LOCATION  Heveadorp

ADRES  Ir. Munterlaan 52

PostAL code 6869 TE

COUNTRY Netherlands

PHONE +31263337064



Plan ecology is the component of ecology dealing with planning. The term originates from the Danish : planøkologi or English plan ecology, see eg. Per Christensen (1990). In other Scandinavian countries the term is also sometimes used. The term shows exactly what some ecologists are doing: application of ecological knowledge in land planning and design.

Most near the name “plan ecology" is the term applied “landscape ecology”, but is less scientifically and more socially oriented. It has also a strong focus on interdisciplinary collaboration. Issues addressed in plan ecology are in addition to landscape ecology, environmental science, planning, landscape architecture and urban design. It deals with modern issues such as:

-  spatial solutions to climate change in nature and landscape

-  consequences of plans for European nature, like Natura 2000

-  natural aspects of the Environmental Impact Assessment (EIA)

-  ecological sustainability in landscape and urban planning

DESIGN AND NATURE. Ecologists are often scientifically trained biologists who are strongly guided by knowledge and analysis. The architect, landscape architect and urban designer sees the ecologist as an expert to provide information. Preferably, the designer not often invites the ecologist at the design table. At the most he gives the plan to the ecologist for a  test afterwards.  In nature projects, the roles are often reversed. Ecologists than often are designing the plan by themselves. The ecologist sees the designer than as someone who tests the specifications and calculations. In short, there is too little integration and too little cooperation. And it shows: plans of designers tend to run wild and plans of ecologists are not attractive.

Sjef Jansen Plan Ecology is an office that has a lot of respect for designers. It wants to cooperate in projects that are environmentally correct and excel in architecture and sustainability

WATER AND NATURE The Sea level is rising and river run-off is increasing. Although we can continue for a long time with pumping, sand suppletion, dams and dike building more often periods will occur that river water masses cannot be removed in a few days. A new generation of solutions is needed: either larger or more flexible. In the first category we find a new generation of coastal protection works and flood plains. In the second category belong water inclusive design, floating houses, reservoirs, waterlogging of peatlands and less compartments in polders.

Sjef Jansen Plan Ecology works on a new generation of water projects to cope with sea level rise in combination with increased river run-off.

POLICY AND NATURE. Now the 162 Dutch Natura 2000 areas are almost designated, the spatial and environmental impact becomes clear. About the permissible effects is still much unclear. Maybe the 162 management plans will clarify some puzzles, but that’s not certain at all. When there is significant impact, how do we deal with cumulation, or compensation? Also suddenly found Natura 2000 species can make quite a delay. Because the legislature is often inconclusive, it appears that the judges will determine the permissible limits.

Sjef Jansen Plan Ecology knows a lot of Natura 2000. The agency can help promoters preventing blunders. Sometimes it will make an assessment and a plan-EIS is necessary. Also, Plan ecology can help the makers of the province and municipality to protect Natura 2000 sites and other natural areas in land use and policy plans.

ENVIRONMENT AND NATURE. A few years ago, it seemed to become quiet around environmental themes desiccation, acidification, eutrophication and disturbance.  Indeed, particulate matter and CO2 (climatic change) dominated the discussion in the media. The spatial reconstruction of industrial farming, combined with technical means such as air scrubbers seemed to work out just fine to the solution of acidification and eutrophication. This appears now partly an illusion. For Natura 2000 asks for much more stringent standards. It becomes also clear that intensive farming is not the only problem, the cattle industry and our expanding road network are other problems.

Sjef Jansen Plan Ecology looks for better solutions, solutions where everyone can live with. There should be agreement about the phasing of reduction in nitrogen load.