Staff Publications

Staff Publications

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    '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.

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Over a century of data reveal more than 80% decline in butterflies in the Netherlands
Strien, Arco J. van; Swaay, Chris A.M. van; Strien-van Liempt, Willy T.F.H. van; Poot, Martin J.M. ; WallisDeVries, Michiel F. - \ 2019
Biological Conservation 234 (2019). - ISSN 0006-3207 - p. 116 - 122.
Bayesian inference - Distribution - JAGS - List length analysis - Living Planet Index - Monitoring

Opportunistic butterfly records from 1890 to 2017 were analysed to quantitatively estimate the overall long-term change in occurrence of butterfly species in the Netherlands. For 71 species, we assessed trends in the number of occupied 5 km × 5 km sites by applying a modified List Length method, which takes into account changes in observation effort. We summarised the species trends in a Multi-Species Indicator (MSI) by taking the geometric mean of the species indices. Between 1890–1930 and 1981–1990, the MSI decreased by 67%; downward trends were detected for 42 species, many of which have disappeared completely from the Netherlands. Monitoring count data available from 1992 showed a further 50% decline in MSI. Combined, this yields an estimated decline of 84% in 1890–2017. We argue that in reality the loss is likely even higher. We also assessed separate MSIs for three major butterfly habitat types in the Netherlands: grassland, woodland and heathland. Butterflies strongly declined in all three habitats alike. The trend has stabilised over recent decades in grassland and woodland, but the decline continues in heathland.

A new satellite-based indicator to identify spatiotemporal foraging areas for herbivorous waterfowl
Wei, Jie ; Xin, Qinchuan ; Ji, Luyan ; Gong, Peng ; Si, Yali - \ 2019
Ecological Indicators 99 (2019). - ISSN 1470-160X - p. 83 - 90.
Distribution - Geese - MODIS - Nutrient biomass - Plant phenology - Yangtze River floodplain

The distribution of food resources is a key factor in habitat selection. Herbivorous waterfowl prefer early-stage growing plants (from the onset of plant growth to the peak in nutrient biomass) as these offer higher energy intake rates. This plant development stage is not fully captured by commonly used satellite-derived vegetation indicators, which focus on plant biomass (e.g., Enhanced Vegetation Index, EVI) or active plant growth (e.g., the differential EVI between current and a previous date, diffEVI). To improve mapping suitable grazing areas for herbivorous waterfowl, we propose a new satellite-based plant growth indicator of early-stage plant growth (ESPG). We hypothesize that herbivorous waterfowl prefer plants at an early development stage during the growing season and select plants with a relatively later end of ESPG during the non-growing season. We use satellite tracking data of 20 greater white-fronted geese (Anser albifrons) wintering in the Yangtze River floodplain to validate our predictions. We build generalized linear models for goose distributions during the growing and non-growing seasons and compare the performance of ESPG to commonly used plant growth indictors (EVI and diffEVI). During the growing season, ESPG can explain 53% of variation in the goose distribution, outperforming EVI (27%) and diffEVI (34%). During the non-growing season, only the end of ESPG significantly influences goose distribution, explaining 25% of the variance (ESPG: AUC = 0.78; EVI: AUC = 0.58; diffEVI: AUC = 0.58). The newly-developed plant growth indicator ESPG could be used to improve models of herbivorous waterfowl distributions and hence support efforts toward waterfowl conservation and wetland management.

Liberalizing rural-to-urban construction land transfers in China : Distribution effects
Tan, Rong ; Wang, Rongyu ; Heerink, Nico - \ 2018
China Economic Review (2018). - ISSN 1043-951X
China - Distribution - Land market - Tradable quotas
China's land market is characterized by a dual urban-rural system, with the government in control of rural-urban land transfers. In recent years, different types of pilot projects have been implemented to experiment with liberalizing markets for rural-urban construction land transfers. The objective of this study is to gain insights into the distributional effects of three different types of land liberalization rules by making a comparative analysis of three pilot projects carried out under each of these liberalization rules. We find that transfers facing more liberalized rules result in higher shares of land revenue flowing to the rural sector and thereby reduce the ruralurban income gap. But direct transfers between rural and urban land users also contribute to growing income inequality within the rural sector, as households living in urban fringes benefit relatively more from such transfers. A tradable quota system can reduce the impact of location on the price of land, and thereby contribute to a more equal distribution of the revenues of rural-urban land transfers within the rural sector.
Value of information to improve daily operations in high-density logistics
Viet, Nguyen Quoc ; Behdani, Behzad ; Bloemhof, Jacqueline - \ 2018
International Journal on Food System Dynamics 9 (2018)1. - ISSN 1869-6945 - p. 1 - 20.
Agro-food logistics - Distribution - High-density logistics - Information accuracy - Value of information
Agro-food logistics is increasingly challenged to ensure that a wide variety of high-quality products are always available at retail stores. This paper discusses high-density logistics issues caused by more frequent and smaller orders from retailers. Through a case study of the distribution process in a Dutch floricultural supply chain, we demonstrate that using inbound and outbound information flows to plan daily warehouse operations improves the logistics performance. A discrete-event simulation and a simulation-based scheduling algorithm are used as decision-support models to assess the value of information. The results indicate that the higher the density of logistics process, the higher the value of the information. Future research will investigate different uses of information as more types of information become available in the agro-food sector supply chains.
First record of Harmothoe aspera (Hansen, 1879) (Polychaeta: Polynoidae) in the Dutch North Sea
Spierings, Martijn ; Dias, Inês Maia ; Coolen, Joop W.P. ; Weide, Babeth Van Der; Cuperus, Joël - \ 2017
Marine Biodiversity Records 10 (2017)1. - ISSN 1755-2672 - 4 p.
Harmothoe - Harmothoe aspera - Polynoidae - North Sea - Gas platform - Distribution
Harmothoe aspera has been recorded in surveys off the Strait of Georgia, the Skagerrak, and the Barents, Mediterranean and Japanese sea. The recorded depth ranged from circa 48 m to circa 1500 m. This is the first report of H. aspera in the Dutch Exclusive Economic Zone (EEZ), and the first report in a depth range between
15 and 20 m.
Naturalized alien flora of the world : Species diversity, taxonomic and phylogenetic patterns, geographic distribution and global hotspots of plant invasion
Pyšek, Petr ; Pergl, Jan ; Essl, Franz ; Lenzner, Bernd ; Dawson, Wayne ; Kreft, Holger ; Weigelt, Patrick ; Winter, Marten ; Kartesz, John ; Nishino, Misako ; Antonova, Liubov A. ; Barcelona, Julie F. ; Cabezas, Francisco J. ; Cárdenas, Dairon ; Cárdenas-Toro, Juliana ; Castaño, Nicolás ; Chacón, Eduardo ; Chatelain, Cyrille ; Dullinger, Stefan ; Ebel, Aleksandr L. ; Figueiredo, Estrela ; Fuentes, Nicol ; Genovesi, Piero ; Groom, Quentin J. ; Henderson, Lesley ; Inderjit, ; Kupriyanov, Andrey ; Masciadri, Silvana ; Maurel, Noëlie ; Meerman, Jan ; Morozova, Olga ; Moser, Dietmar ; Nickrent, Daniel L. ; Nowak, Pauline M. ; Pagad, Shyama ; Patzelt, Annette ; Pelser, Pieter B. ; Seebens, Hanno ; Shu, Wen Sheng ; Thomas, Jacob ; Velayos, Mauricio ; Weber, Ewald ; Wieringa, Jan J. ; Baptiste, María P. ; Kleunen, Mark Van - \ 2017
Preslia 89 (2017)3. - ISSN 0032-7786 - p. 203 - 274.
Alien species - Distribution - Global Naturalized Alien Flora (GloNAF) database - Invasive species - Islands - Life history - Mainland - Naturalized species - Phylogeny - Plant invasion - Regional floras - Species richness - Taxonomy - Zonobiome
Using the recently built Global Naturalized Alien Flora (GloNAF) database, containing data on the distribution of naturalized alien plants in 483 mainland and 361 island regions of the world, we describe patterns in diversity and geographic distribution of naturalized and invasive plant species, taxonomic, phylogenetic and life-history structure of the global naturalized flora as well as levels of naturalization and their determinants. The mainland regions with the highest numbers of naturalized aliens are some Australian states (with New South Wales being the richest on this continent) and several North American regions (of which California with 1753 naturalized plant species represents the world's richest region in terms of naturalized alien vascular plants). England, Japan, New Zealand and the Hawaiian archipelago harbour most naturalized plants among islands or island groups. These regions also form the main hotspots of the regional levels of naturalization, measured as the percentage of naturalized aliens in the total flora of the region. Such hotspots of relative naturalized species richness appear on both the western and eastern coasts of North America, in north-western Europe, South Africa, south-eastern Australia, New Zealand, and India. High levels of island invasions by naturalized plants are concentrated in the Pacific, but also occur on individual islands across all oceans. The numbers of naturalized species are closely correlated with those of native species, with a stronger correlation and steeper increase for islands than mainland regions, indicating a greater vulnerability of islands to invasion by species that become successfully naturalized. South Africa, India, California, Cuba, Florida, Queensland and Japan have the highest numbers of invasive species. Regions in temperate and tropical zonobiomes harbour in total 9036 and 6774 naturalized species, respectively, followed by 3280 species naturalized in the Mediterranean zonobiome, 3057 in the subtropical zonobiome and 321 in the Arctic. The New World is richer in naturalized alien plants, with 9905 species compared to 7923 recorded in the Old World. While isolation is the key factor driving the level of naturalization on islands, zonobiomes differing in climatic regimes, and socioeconomy represented by per capita GDP, are central for mainland regions. The 11 most widely distributed species each occur in regions covering about one third of the globe or more in terms of the number of regions where they are naturalized and at least 35% of the Earth's land surface in terms of those regions' areas, with the most widely distributed species Sonchus oleraceus occuring in 48% of the regions that cover 42% of the world area. Other widely distributed species are Ricinus communis, Oxalis corniculata, Portulaca oleracea, Eleusine indica, Chenopodium album, Capsella bursa-pastoris, Stellaria media, Bidens pilosa, Datura stramonium and Echinochloa crus-galli. Using the occurrence as invasive rather than only naturalized yields a different ranking, with Lantana camara (120 regions out of 349 for which data on invasive status are known), Calotropis procera (118), Eichhornia crassipes (113), Sonchus oleraceus (108) and Leucaena leucocephala (103) on top. As to the life-history spectra, islands harbour more naturalized woody species (34.4%) thanmainland regions (29.5%), and fewer annual herbs (18.7% compared to 22.3%). Ranking families by their absolute numbers of naturalized species reveals that Compositae (1343 species), Poaceae (1267) and Leguminosae (1189) contribute most to the global naturalized alien flora. Some families are disproportionally represented by naturalized aliens on islands (Arecaceae, Araceae, Acanthaceae, Amaryllidaceae, Asparagaceae, Convolvulaceae, Rubiaceae, Malvaceae), and much fewer so on mainland (e.g. Brassicaceae, Caryophyllaceae, Boraginaceae). Relating the numbers of naturalized species in a family to its total global richness shows that some of the large species-rich families are over-represented among naturalized aliens (e.g. Poaceae, Leguminosae, Rosaceae, Amaranthaceae, Pinaceae), some under-represented (e.g. Euphorbiaceae, Rubiaceae), whereas the one richest in naturalized species, Compositae, reaches a value expected from its global species richness. Significant phylogenetic signal indicates that families with an increased potential of their species to naturalize are not distributed randomly on the evolutionary tree. Solanum (112 species), Euphorbia (108) and Carex (106) are the genera richest in terms of naturalized species; over-represented on islands are Cotoneaster, Juncus, Eucalyptus, Salix, Hypericum, Geranium and Persicaria, while those relatively richer in naturalized species on the mainland are Atriplex, Opuntia, Oenothera, Artemisia, Vicia, Galium and Rosa. The data presented in this paper also point to where information is lacking and set priorities for future data collection. The GloNAF database has potential for designing concerted action to fill such data gaps, and provide a basis for allocating resources most efficiently towards better understanding and management of plant invasions worldwide.
Logistics network design for perishable products with heterogeneous quality decay
Keizer, Marlies de; Akkerman, Renzo ; Grunow, Martin ; Bloemhof-Ruwaard, Jacqueline ; Haijema, Rene ; Vorst, Jack G.A.J. van der - \ 2017
European Journal of Operational Research 262 (2017)2. - ISSN 0377-2217 - p. 535 - 549.
Customer order decoupling point - Distribution - Location - OR in agriculture - Postponement

The duration of logistics operations, as well as the environmental conditions during these operations, significantly impact the performance of a logistics network for fresh agricultural products. When durations or temperatures increase, product quality decreases and more effort is required to deliver products in time and with the right quality. Different network designs lead to different durations and conditions of transport, storage, processing, etc. Therefore, when making network design decisions, consequences for lead time and product quality should be taken into account. As decay of perishable products, for instance food, is often not uniform, heterogeneity in product quality decay also has to be considered. The aim of this paper is to show how product quality decay as well as its heterogeneity can be integrated in a network design model. A new mixed integer linear programming formulation is presented, which positions stocks and allocates processes to maximise profit under quality constraints. It is applied to several test instances from the horticultural sector. Results show that different levels of decay lead to different network structures. Changing decay rates due to processing particularly affect the level of postponement. Heterogeneity in product quality causes a split in product flows with high and low product quality. All in all, it is shown that heterogeneous product quality decay should be taken into account in network design as it significantly influences network designs and their profitability, especially when the supply chain includes processes that change the level of decay, and product quality differences can be exploited in serving different markets.

First record of Syllis vittata (Polychaeta: Syllidae) in the Dutch North Sea
Rocha Maia Dias, Ines ; Spierings, Martijn ; Coolen, Joop W.P. ; Weide, Babeth van der; Cuperus, Joël - \ 2017
Marine Biodiversity Records 10 (2017). - ISSN 1755-2672 - 4 p.
Syllidae - Syllis vittata - polychaeta - North Sea - Gas platform - Distribution - first record
Background: Syllis vittata is present from British Waters to the Mediterranean Sea, Morocco and the Canary Islands and recorded from the South African coast and Indian Ocean.
Results and conclusion: In this paper, S. vittata is reported for the first time in the Dutch EEZ.
The stretched exponential as one of the alternatives for the power law to fit ranked species abundance data
Straatsma, G. ; Egli, S. - \ 2017
Matters (2017). - ISSN 2297-8240
Species - Abundance - Distribution - Stretched - Exponential
A central object in community ecology is the species abundance distribution, SAD. We are interested in the power law and its allies for ranked species abundance data. We collected 12 large data sets consisting of many samples. The preliminary fitting result makes a robust impression (12 systems at three scales of integration) that the stretched exponential is an interesting alternative for the power law. For further work advanced statistics are required. Not only ‘our’ data but, quite often, other data as well, consist of sample × species cross tables. With cross tables, also 'within species over samples' characteristics can be studied. An integrated view on data-patterns in multi-sample sets may help to identify generative processes for and the formulation of a relatively simple model for species abundance data.
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