Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Records 1 - 6 / 6

  • help
  • print

    Print search results

  • export

    Export search results

  • alert
    We will mail you new results for this query: q=Jonckheere
Check title to add to marked list
The Role and Need for Space-Based Forest Biomass-Related Measurements in Environmental Management and Policy
Herold, Martin ; Carter, Sarah ; Avitabile, Valerio ; Espejo, Andrés B. ; Jonckheere, Inge ; Lucas, Richard ; McRoberts, Ronald E. ; Næsset, Erik ; Nightingale, Joanne ; Petersen, Rachael ; Reiche, Johannes ; Romijn, Erika ; Rosenqvist, Ake ; Rozendaal, Danaë M.A. ; Seifert, Frank Martin ; Sanz, María J. ; Sy, V. de - \ 2019
Surveys in Geophysics 40 (2019)4. - ISSN 0169-3298 - p. 757 - 778.
The achievement of international goals and national commitments related to forest conservation and management, climate change, and sustainable development requires credible, accurate, and reliable monitoring of stocks and changes in forest biomass and carbon. Most prominently, the Paris Agreement on Climate Change and the United Nations’ Sustainable Development Goals in particular require data on biomass to monitor progress. Unprecedented opportunities to provide forest biomass data are created by a series of upcoming space-based missions, many of which provide open data targeted at large areas and better spatial resolution biomass monitoring than has previously been achieved. We assess various policy needs for biomass data and recommend a long-term collaborative effort among forest biomass data producers and users to meet these needs. A gap remains, however, between what can be achieved in the research domain and what is required to support policy making and meet reporting requirements. There is no single biomass dataset that serves all users in terms of definition and type of biomass measurement, geographic area, and uncertainty requirements, and whether there is need for the most recent up-to-date biomass estimate or a long-term biomass trend. The research and user communities should embrace the potential strength of the multitude of upcoming missions in combination to provide for these varying needs and to ensure continuity for long-term data provision which one-off research missions cannot provide. International coordination bodies such as Global Forest Observations Initiative (GFOI), Committee on Earth Observation Satellites (CEOS), and Global Observation of Forest Cover and Land Dynamics (GOFC‐GOLD) will be integral in addressing these issues in a way that fulfils these needs in a timely fashion. Further coordination work should particularly look into how space-based data can be better linked with field reference data sources such as forest plot networks, and there is also a need to ensure that reference data cover a range of forest types, management regimes, and disturbance regimes worldwide.
Heterogeneity in the genus Allovahlkampfia and the description of the new genus Parafumarolamoeba (Vahlkampfiidae; Heterolobosea)
Geisen, Stefan ; Bonkowski, M. ; Zhang, J. ; Jonckheere, de, J.F. - \ 2015
European Journal of Protistology 51 (2015)4. - ISSN 0932-4739 - p. 335 - 349.
Heterolobosean amoebae are common and diverse members of soil protist communities. In this study, we isolated seven strains of amoebae from soil samples taken in Tibet (at high altitude), Sardinia and the Netherlands, all resembling to belong to a similar heterolobosean morphospecies. However, sequences of the small subunit (SSU) rDNA and internal transcribed spacers, including the 5.8S rDNA, revealed a high heterogeneity in the genus Allovahlkampfia to which six of the isolates belong. Some unnamed strains, of which the sequences had been published before, are also included within the genus Allovahlkampfia. One Allovahlkampfia isolated in the Netherlands harbors a twin-ribozyme, containing a His−Cys box, similar to the one found in strain BA of Allovahlkampfia. The other SSU rDNA sequence grouped in phylogenetic analyses with sequences obtained in environmental sequencing studies as sister to the genus Fumarolamoeba. This phylogenetic placement was supported by analyses of the 5.8S rDNA leading us to describe it as a new genus Parafumarolamoeba.
Expansion of acidophytic late-successional bryophytes in Dutch fens between 1940 and 2000
Paulissen, M.P.C.P. ; Schaminee, J.H.J. ; During, H.J. ; Wamelink, G.W.W. ; Verhoeven, J.T.A. - \ 2014
Journal of Vegetation Science 25 (2014)2. - ISSN 1100-9233 - p. 525 - 533.
nitrogen deposition - co westmeath - scragh-bog - vegetation - mire - acidification - netherlands - ammonium - water - metaanalyses
Question How did frequency and local abundance of key bryophytes in Dutch fens change between 1940 and 2000? Location The Netherlands. Methods A total of 1939 vegetation relevés, objectively assigned to the class Parvocaricetea and dating from the period 1940–1999 inclusive, were extracted from a national Netherlands database. From this relevé set, two additional data sets were derived; these were syntaxonomically homogeneous at the association level. One contained 418 Scorpidio-Caricetum diandrae relevés and the other 956 Pallavicinio-Sphagnetum relevés. The following analyses were done for these three data sets: frequency and local abundance change of 13 bryophyte species over three 20-yr periods were described using logistic regression and the nonparametric Jonckheere–Terpstra test, respectively. Results Acidophytic, late-successional species, notably Sphagnum palustre and Polytrichum uliginosum, have replaced relatively early-successional species such as brown mosses, Sphagnum subnitens and Sphagnum squarrosum during the studied period. The results were mostly consistent across the three data sets. Local abundance patterns generally paralleled those of frequency, although cover trends were often less robust. Conclusions Drastic changes have taken place in the bryophyte layer of Dutch fens between 1940 and 2000. Our study has shown that acidophytic, late-successional bryophytes have replaced relatively early-successional brown moss and Sphagnum species. Both hydrological changes and nutrient shifts (in particular phosphorus enrichment and ammonium toxicity) appear to have been responsible for the observed rapid shifts in the bryophyte layer of Dutch fens.
Correspondence - Satellites: Ambition for forest initiative
Foody, G. ; Achard, F. ; Held, A. ; Herold, M. ; Jonckheere, I. ; Penman, J. ; Wulder, M. - \ 2013
Nature 498 (2013)7452. - ISSN 0028-0836 - p. 37 - 37.
Plant trait attributes of the resident community and local soil conditions as predictors for the occurence of species of the Calthion palustris alliance
Cordlandwehr, V. ; Boom, B.W.A.F.H. van den; Ozinga, W.A. ; Bekker, R.M. ; Bakker, J.P. - \ 2007
In: Eurodiversity abstract book, Paris, France, 3-5 Oktober 2007. - Strasbourg : European Science Foundation - p. 59 - 59.
Community assembly from species pools: the effects of functional traits
Ozinga, W.A. ; Cordlandwehr, V. ; Bekker, R.M. ; Hennekens, S.M. ; Braak, C.J.F. ter; Bakker, J.P. ; Schaminée, J.H.J. ; Groenendael, J.M. van - \ 2007
In: Eurodiversity abstract book, Paris, France, 3-5 Oktober 2007. - Paris : European Science Foundation - p. 62 - 62.
Check title to add to marked list

Show 20 50 100 records per page

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.