Herminium monorchis_monitoring

Study Extent

The four known localities for the species; Hvaler, Viken, Norway. Annual counts of Herminium monorchis since 2014 (except 2018).

Sampling

A set of permanent plots were randomly established at each of the three localities known in 2014. All Herminium monorchis plants were marked, and plots were placed around a randomly drawn set of plants; 10 at each of the localities Skipstadsand and Teneskjær, and 20 at Skjellvik. Plots were marked with aluminium tubes. In 2021 the sampling was extended. Transects were established across the localities, and plots were systematically placed at 10 m distances along the transects. At the fourth locality (Filletassen), monitoring was established in 2020. Eight transects were established from the mid-point of the locality in the directions N, NE, E, SE, S, SW, W, and NW. 10 locations along the transects were randomly selected and permanent plots were established. The number of fertile and vegetative ramets woth aboveground biomass within each plot is counted annually at peak growing season.

Method steps

1. Methods are described in Evju et al. (2021, 2022), and in Kravdal et al. (2016).

The dataset covers Herminium monorchis, a perennial orchid. Also other vascular plants recorded at the Norwegian Red List for species are recorded (since 2021).

1. Plantae
   common name: vascular plants rank: kingdom

Hvaler, Viken, Norway