PP Systems

Monitoring ecosystem optical properties with the UniSpec-SC


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Understanding patterns of ecosystem properties is important if we are to effectively monitor ecosystem change due to a variety of reasons (e.g. global changes, human management). Remote sensing provides a great tool for monitoring the earth's surface at different temporal and spatial scales. Patterns of vegetation and biodiversity dynamics are important ecosystem properties, with strong links to important ecosystem functions. Species distribution and vegetation change pattern at different temporal (e.g. seasonal) and spatial scales offer an ecological basis for land use and conservation plans. Ground base ecosystem monitoring can be accomplished using the PP Systems’ UniSpec-SC (single channel) spectral analysis system (this can also be achieved using the UniSpec-DC). This application note mainly targets the use of the UniSpec-SC for ecosystem monitoring.

The UniSpec-SC has widely been used for leaf level reflectance measurement with a built-in halogen lamp, bifurcated fiber optic cable (UNI400-Standard/UNI410-Mini) and a leaf clip (UNI500- Standard/UNI501-Mini). The UniSpec-SC can be easily used for canopy and ecosystem reflectance measurements so that the measurements can be used for multi-scale analyses (Cheng et. al., in press). For measurements of canopy reflectance, the internal halogen lamp is not required and can be disabled. At present, PP Systems offers two options for measurement of canopy and ecosystem reflectance based on a “defined” and “manual” field of view (FOV):

Option 1 –Defined FOV
If the exact FOV is required, PP Systems can supply FOV lens with a defined FOV. Most customers will require a straight fiberoptic (generally 2m in length) and a specific FOV for the downward looking foreoptic. At present, we offer three different FOV lens accessories (3°, 6° or 12°) along with associated fiberoptics to choose from.

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