What are essential variables?

There is a key set of measurements, or essential variables, that are needed to monitor biological invasions. Some data must be provided by countries themselves, whereas a wealth of additional supporting information is available from elsewhere to support national and global monitoring efforts. Together these essential variables provide the minimum information set needed to assess and track the status of biological invasion [1, 2].

The essential variables for invasion monitoring fit within the broader framework of Essential Biodiversity Variables (EBVs). EBVs are the “measurements required for the study, reporting, and management of biodiversity change [3]”. The EBV framework underpins the development of a global system of harmonised observations on biodiversity change. Similarly, essential variables for invasion monitoring underpin the development of a global system of harmonised observations to assess and track the status of biological invasion [1-5 ].


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Details on this publication:

A vision for global monitoring of biological invasions.

Latombe, G., Pyšek, P., Jeschke, J.M., Blackburn, T.M., Bacher, S., Capinha, C., Costello, M.J., Fernández, M., Gregory, R.D., Hobern, D., Hui, C., Jetz, W., Kumschick, S., McGrannachan, C., Pergl, J., Roy, H.E., Scalera, R., Squires, Z.E., Wilson, J.R.U., Winter, M., Genovesi, P., McGeoch, M.A. (2016). A vision for global monitoring of biological invasions, Biological Conservationdoi:10.1016/j.biocon.2016.06.013.


 

The three essential variables for invasion monitoring are:

  1. Alien species occurrence
  2. Species alien status
  3. Alien species impact
There are a number of other useful variables that will further enhance the monitoring of biological invasions:    Other variables

 


Referenced material and links

[1]Latombe, G., Pyšek, P., Jeschke, J.M., Blackburn, T.M., Bacher, S., Capinha, C., Costello, M.J., Fernández, M., Gregory, R.D., Hobern, D., Hui, C., Jetz, W., Kumschick, S., McGrannachan, C., Pergl, J., Roy, H.E., Scalera, R., Squires, Z.E., Wilson, J.R.U., Winter, M., Genovesi, P., McGeoch, M.A. (2016). A vision for global monitoring of biological invasions, Biological Conservation. doi:10.1016/j.biocon.2016.06.013.

[2] McGeoch, M.A. and Squires, Z. (2015) An Essential Biodiversity Variable approach to monitoring biological invasions: Guide for Countries. GEO BON Technical Series 2, 13 pp. http://www.geobon.org/Downloads/reports/GEOBON/2015/MonitoringBiologicalInvasions.pdf

[3] Pereira, H. M. et al., (2013) Essential Biodiversity Variables. Science 339, 277–278. doi: 10.1126/science.1229931.

[4] McGeoch, M.A, Chown, S.L. and Kalwij, J.M. (2006) A global indicator for biological invasion. Conservation Biology 20, 1635 – 1646.  doi: 10.1111/j.1523-1739.2006.00579.x.

[5] McGeoch, M.A., Butchart, S.H.M., Spear, D., Marais, E., Kleynhans, E.J., Symes, A., Chanson, J., Hoffmann, M. (2010) Global indicators of biological invasion: species numbers, biodiversity impact and policy responses. Diversity and Distributions 16, 95-108. doi: 10.1111/j.1472-4642.2009.00633.x