Each row represents a single study, while each column details the particular variable as reported in that study. Different colors represent different categories of value (e.g., different types of killing preservative). Widespread adoption of more standardized methods and reporting would facilitate more nuanced analysis of biodiversity change.Īraneae biodiversity sampling carabidae formicidae pitfall trap standard design.Ī colorized matrix of pitfall trap design variables recorded from 60 research papers. In addition, we provide a table to promote a more standardized reporting of the key methodological variables. We propose a standardized pitfall trap design for the study of ground-active arthropods. However, our results show that, counterproductive to this goal, over the last 20 years there has little progress in reducing the methodological variation. There is a growing need for improved comparability between studies to facilitate the generation of large-scale, long-term biodiversity datasets. We report a decline in the completeness of methodological reporting over a 20-year period, while there has been no clear reduction in the methodological variation between researchers using pitfall traps for arthropod sampling.
Here, we present a meta-analysis and description highlighting this variation in a common, widely used entomological survey technique.
The ability to draw meaningful comparison across studies is severely hampered by extensive variation in the design of the sampling equipment and how it is used. To understand change in global biodiversity patterns requires large-scale, long-term monitoring.
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