"high biodiversity" is perfectly acceptable and very commonly used in written English.
For example, "The dense tropical rainforest has a high biodiversity of flora and fauna."
Newer, undamaged pipes have high biodiversity; often hundreds of species.
Protecting them means conserving habitat with high biodiversity.
He calls this high biodiversity, low-carbon polyculture – working with nature, not trying to control it.
For example, forests with high biodiversity will be more resilient to climate change.
The surprisingly high biodiversity of wild bees in orchards has entomologists and apple growers buzzing.
The ants of Nantucket: undexpectedly high biodiversity in an anthropogenic landscape.
The Ants of Nantucket: Unexpectedly High Biodiversity in an Anthropogenic Landscape.
The Niger Delta has extremely high biodiversity with unique plant and animal species.
The cheapest and quickest way to conserve areas of high biodiversity is to respect tribal peoples' rights.
Baikal's high biodiversity includes over 3,600 plant and animal species, most of which are endemic to the lake.
Vertical walls in marine environments can harbour high biodiversity and provide natural protection from bottom-trawling activities.
