Adjustable collapsible quadrat with integrated scaling markers

Abstract

An adjustable collapsible quadrat with integrated scaling markers was created to facilitate biological, ecological, and environmental field research. It uses corner elbows to securely form the outer corners of the main frame structure. It also has tubular rod assembly detachably connected to the corner elbows to establish the outer frame. These tubular rod assembly features variable sizes to allow researchers to easily adjust the overall sampling area. Furthermore, the system includes an adjustable locking clamps secured to the tubular rod assembly to firmly lock the frame components in position during use. A cross junction center connector is used to stabilize the center intersection of the grid. Moreover, the quadrat provide scaling marker crossbars attached to the locking clamps and the center connector. These scaling marker crossbars feature high-contrast centimeter markings extending from a central "0" origin reference point located at the center connector. This feature allows investigators to perform real-time spatial measurement, species sizing, and coverage estimation directly within the sampling area without requiring auxiliary measuring tools. Additionally, all frame components are fully detachable, providing a compact structure for effortless transport and quick assembly during field operations or underwater sampling environments.