The invasive nature of barbed goatgrass is causing a decrease in species diversity, and a decrease in forage. Most grazing animals tend to avoid barbed goatgrass because they do not like the taste of it, allowing the grass to take over the other grasses and grains consumed by the animals. The barbs on the flower spikelets containing the seeds become attached easily to animal fur, human clothing, and vehicles which allows the seeds to become more widely dispersed over the area.
Barbed goatgrass's invasive characteristics are causing a decline in species diversity and forage quality. Grazing animals typically avoid barbed goatgrass due to its bitter taste, allowing it to outcompete other grasses and grains. The sharp spikes on the flower spikelets containing seeds easily adhere to animal fur, clothing, and vehicles, promoting widespread seed dispersal.