Joining weed survey datasets for analyses on a European scale a proposal

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1 Joining weed survey datasets for analyses on a European scale a proposal Jana Bürger Bärbel Gerowitt Crop Health, University Rostock, Germany European Weed Research Society WG Meeting Weeds and Biodiversity Riga 2016

2 Precipitation Why? Data on occurences and environment Soil Precipitation Temperature Environmental Niche (environmental conditions) Species records Distribution (Projection) Geographic space Distribution model Mean temperature Var 1+ Var 2+ Var 3 + Var Environmental space

3 Why?

4 Why? Solanum nigrum recent now future p/a p/a

5 Precipitation Why? Not each plant is a problem. Environmental niche damage niche Damage niche Mean temperature

6 Maize weeds in Europe Highly significant, occuring widespread and regularly Meissle et al. (2010) J. Appl. Entomol

7 Chenopodium album Environmental niche Damage niche Setaria viridis

8 How would it be done? Make data visible Collaborate on analyses Talk about possible & necessary extra data Build data base Learn from other disciplines

9 Make data visible Continuum of visibility: list within Working Group --> public Collect list of data sets

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11 Make data visible Continuum of visibility: list within Working Group --> public Collect list of data sets Publish metadata in GIVD

12 Make data visible

13 Make data visible Continuum of visibility: list within Working Group --> public Collect list of data sets Publish metadata in GIVD Data base report

14 Make data visible

15 Collaborate on analyses Distribution and distribution changes Weed communities Relationship environment managementweed (community)

16 Work on data discussions, small working group Agree on minimum extra information required Unify formats Use tools (Turboveg, R ) Hands on Workshop (Funding by EWRS, sdiv, Volkswagen Foundation)

17 Organise and build data base Money? Collaborations WeedMap initiative Vegetation scientists: European Vegetation Archive Adapting existing structures

18 What s to be gained In general: Easier access to data for many Interdisciplinarity For you: Data Publications Citations Exchange

19 What would YOU be interested in?

20 Acknowledgement I thank the EWRS for their help to attend the meeting with a travel grant.

21 Species loss in arable weed vegetation Recent review (Richner et al Weed Research 55, 1 13) 53 data sets with an average 252 plots Denmark: Andreasen et al Journal of Applied Ecology 33: Germany: Baessler & Klotz 2006 Agriculture, Ecosystems and Environment 115:43-50 France: Fried et al Journal of Vegetation Science 20:49-58 Decline in average species number per plot: 20% Mainly characteristic or threatened arable weed species Increase in average species number per plot in studies after Species preferring nutrient-rich sites, neophytes and monocotyledons

22 Learn about weeds. Use ecological methods. Typical associations and shaping factors Weeds surveys and resurveys Recent Review (Hanzlik & Gerowitt 2016 Agron. Sustain. Dev. 36:11) 43 surveys on farmed fields up to nine crops periods of 1 to 67 years 59 to 4423 fields unified methodology needed for good comparability