Over the last century, rates of human conversion have been consistent across ___________.

The correct answer is: Biomes

The ecosystem and biomes have been most significantly altered globally by human activity.
Human activities such as agriculture and logging often result in habitat loss or the introduction of invasive species, leaving native species vulnerable. In the early days, biomes were classified by appearance—or physiognomy.
Impacts from human activity on land and in the water can influence ecosystems profoundly. Climate change, ocean acidification, permafrost melting, habitat loss, eutrophication, stormwater runoff, air pollution, contaminants, and invasive species are among many problems facing ecosystems.