this. sometimes also referred to as "ecosystem services", which many land use types can have. like a managed forest or a farm would have "provisioning" services, because it provides for materials, textiles, food, medicinal resources, energy to meet needs of human activity.

other service categories are "regulating" (air/water purification, carbon sequestration/climate regulation, waste decomposition/detoxification, pollination, biodiversity/habitat, disturbance regulation [flood/extreme weather protection aka "green infrastructure" like wetlands], and "cultural" (depending on the nature reserve's biome composition, it could be a motif in art/human expression, spiritual/historical, recreational, science/education, therapeutic like social forestry/ecotherapy, animal assisted therapy)

without knowing anything about the specific nature reserve, i would imagine it has a use values in the regulation category and likely some in the cultural category.