A method for complete plant taxon and site inventories in large forest areas with the help of orienteering maps, as exemplified by target forests in Switzerland

Autoři: André Strauss aff001
Působiště autorů: Mabritec AG, Riehen, Switzerland aff001
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225927


Complete plant inventories of large areas of forests in the moderate and boreal zone have thus far been infeasible and have also not been published. The use of orienteering maps (O-maps) for sampling for inventories was tested. In the sampling method presented herein, the “O-map/way method”, O-maps were used for controlled and systematic inspection and sampling, making it possible to carry out successfully complete plant taxon and site inventories of large forest areas (1 to 100 ha). O-maps are much more suitable than the best national or similar topographic maps (NT-maps) for plant inventories in forests; O-maps have many advantages (smaller scale/better resolution, better legibility, internationally standardization, information on vegetation and accessibility), and they contain more small objects, ways (= tracks of any size; roads), and lines and thus have much smaller subareas that allow good orientation and systematic screening for plants. For the example of plant taxon inventories in 6 target areas of 25–85 ha of Swiss midland forests in the moderate/colline zone, the O-map/way method (all accessible areas are screened) was shown to be clearly superior to alternative sampling methods (partial areas screened), such as the NT-map/way method or a plot method, in which only 79.6±6.7% or 34.5±6.6%, respectively, of the taxa found by the O-map/way method were recorded. Taxa detected only by the O-map/way method were shown to be relatively rare at a local as well as at a national scale. The O-map/way method could also be successfully applied to the inventory of plant sites in large forest areas: As shown by the distribution of the sites of five plant species in a target area of 30.1 ha, the great majority of plant sites were detected only by the O-map/way method; but only a few sites were detected by the alternative methods. As O-maps for forests are widely available in many countries, the O-map/way method might allow for complete inventories and other studies in large forest areas.

Klíčová slova:

Biodiversity – Flowering plants – Forests – Pines – Plants – Switzerland – Topographic maps – Trees


1. Landolt E. Flora der Stadt Zürich (1984–1998). Basel, Boston & Berlin: Birkhäuser; 2001.

2. Boch S, Prati D, Müller J, Socher S, Baumbach H, Buscot F, et al. High plants species richness indicates management-related disturbances rather than the conservation status of forests. Basic Appl Ecol. 2013; 14: 496–505.

3. Jayakumar S, Kim SS, Heo J. Floristic inventory and diversity assessment–a critical review. Proc of the Int Aca of Ecology and Environmental Sciences. 2011; 1: 151–168.

4. Auftragnehmer Biodiversitäts-Monitoring Schweiz. Anleitung für die Feldarbeit zum Indikator «Z7- Gefässpflanzen». Bern, Bundesamt für Umwelt. 2017. http://www.biodiversitymonitoring.ch/fileadmin/user_upload/documents/daten/anleitungen/1440_Anleitung_Z7-Pflanzen_v12.pdf

5. swisstopo. Landeskarte der Schweiz, Bern #1166. 2012. https://map.geo.admin.ch/

6. Zentai L. Cartography and orienteering: the implementation of new cartographic techniques in making orienteering maps. Scientific Journal of Orienteering. 2014; 19: 29–37.

7. IOF (International Orienteering Federation). ISOM 2017, International Specification for Orienteering Maps. 2017. http://orienteering.org/resources/mapping/international-specification-for-orienteering-maps-isom-2017/

8. Wikipedia. Orienteering map. 2018. https://en.wikipedia.org/wiki/Orienteering map lastupdate 22.03.2018

9. WorldofO.com. World of O maps. 2019. http://omaps.worldofo.com/ last update 7.03.2019

10. OMaps.de. 2019, http://www.omaps.de/ last update 1.05.2019

11. SOLV Kommission–Karten, swiss orienteering. Schweizer OL-Karten 1965–2015. 2016. https://www.swiss-orienteering.ch/files/kommission_karten/Schweizer_Kartenverzeichnis_1965-2015.pdf

12. BAFU, Bundesamt für Umwelt. Jahrbuch Wald und Holz 2015. 2015.

13. OLG Bern. Karten (Forst 2011, Könizberg 2013, Bremgartenwald 2009, Dählhölzli 2014). 2009–2013. https://www.olgbern.ch/karten.html

14. Lauber K, Wagner G, Gygax A. Flora Helvetica. (5th ed.). Bern, Stuttgart, Wien: Haupt Verlag; 2012.

15. Neldner VJ, Butler DW. Is 500m2 an effective plot size to sample floristic diversity for Queensland’s vegetation? Cunninghamia. 2008; 10: 513–519.

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2019 Číslo 12