On the scale of the Amazon basin (or of the country or state), each grid is a sampling unit, and the units of sampling are smaller sub-units. For long-term ecological studies within the same site, there are spatially explicit standardized modules that allow comparisons within and between grids. Not all organisms can be efficiently sampled at the same sampling unit.
INPA's zoological collections are respositories of biological material that are not only home to species, but also to information about the populations of each species, climatic, edaphic data and so on.
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