Semi-quantitative sampling is one of the two main legs of the project
The COBRA (for Conservation Oriented Biodiversity Rapid Assessment) protocol was originally proposed by Cardoso (2009), and consist of an optimal combinations of number of 1 hour effort samples samples using different collecting methods in a 1 ha plot.
COBRA is an scalable protocol. In this project we will implement the COBRA50 version, which is designed to collect 50% of the diversity in the sampling area.
COBRA 50 involves 12 hours of direct sampling and 12 x 4 pitfalls in 1Ha plots.
The actual number of samples and collecting methods per plot is shown in a Table below.Pitfalls will be active for 2 weeks.
We will sample two plots in Aigüestortes, Ordesa in Q. humilis forests, and 4 in Picos, 2 in Q. humilis x Q. faginea forests and 2 Q. petraea forests.
Click here to find more information on COBRA
Cardoso, P (2009) Standardization and optimization of arthropod inventories—the case of iberian spiders. Biodiversity and Conservation, 18, 3949-3962
COBRA: An optimized, semi-quantitative sampling scheme for surveying arthropod communities