BDM in operation

As surveying biodiversity in habitats relates to small sampling areas, the method calls for fieldworkers to proceed in a particularly meticulous fashion. Using the BDM smartphone app, plant species are recorded directly on the spot. Mosses, mollusks and aquatic insects, however, are preserved and passed on to experts for identification. 

Vascular plants, mosses and mollusks

In order to survey vascular plants, mosses and mollusks in habitats, fieldworkers first localize each 10-m2 sampling area by means of a GPS device and a magnetic locator. Once the magnet buried at the center is found, the sampling area is delimitated using a piece of string 1.8 meters long.

Using the BDM smartphone app, plant species are recorded directly on the spot. While this usually eliminates the necessity of transferring field notes to a computer, some plants need to be collected for subsequent identification. Mosses and mollusks are always passed on to experts for identification.

Please click on any image to view a series of images showing a BDM fieldworker visiting a sampling area.


Aquatic insects

This series of images illustrates the field sampling process for aquatic insects. BDM monitors underwater biodiversity surveying roughly 600 watercourse sections in Switzerland to look for the larvae of mayflies, stoneflies and caddisflies.

Surveying in motion

Following fieldworkers both on land and along a watercourse, the video exemplifies the BDM method for surveying species diversity in habitats.

For more information on the “Species Diversity in Habitats” indicator please click