What technique involves unrolling a measuring tape and assessing species biodiversity at each interval?

The technique that involves unrolling a measuring tape and assessing species biodiversity at each interval is transect sampling. This method is used to measure and observe how species diversity changes along a specific line or gradient across a habitat. By laying out a tape measure and conducting regular sampling at set intervals along the tape, researchers can gather data on the types of species present and how their abundance varies spatially.

Transect sampling is particularly useful in studying the distribution of species in response to environmental variables. For instance, it allows scientists to visualize changes in biodiversity across different habitats or to understand how human activities impact natural ecosystems. This systematic approach enhances the accuracy and reliability of biodiversity assessments.

Netting is generally employed to capture mobile organisms like insects or fish and does not systematically assess biodiversity over a distance. Quadrat sampling involves selecting specific areas for focused study rather than a linear method across a wider area. Canopy fogging is a technique used primarily in forest ecosystems to sample organisms in the canopy layer by dispersing insecticide, which is distinctly different from the method of transect sampling.