paraphrase thois and give me a website citation about Biodiversity: Grasslands were rich in biodiversity with various native plant and animal species.

Natural Grazing: Natural herbivores like bison played a role in maintaining ecosystem balance.

Limited Agriculture: Grasslands were less developed for agriculture and urbanization, preserving their natural state.

After:

                      Habitat Fragmentation: Urban expansion and agriculture have fragmented                                     grassland habitats.

Invasive Species: Non-native species have disrupted the natural balance of grassland ecosystems.

Overgrazing and Habitat Loss: Overgrazing by livestock and land conversion have led to habitat loss and reduced biodiversity in grasslands.