Biological resources include timber and aquatic resources and a range of other animal and plant resources (such as livestock, orchards, crops and wild animals), fungi and bacteria.50 Biological resources form an important part of biodiversity and ecosystems. If harvesting and other losses exceed natural or managed regeneration or replenishment, biological resources become depleted. Biological resources can be natural (non-cultivated) or cultivated. Cultivated biological resources cover animal resources yielding repeat products and tree, crop and plant resources yielding repeat products whose natural growth and regeneration are under the direct control, responsibility and management of an institutional unit.52 They may impact the environment differently than natural ones.