It is not clear what species or situation you are referring to in your question. The Labrador Duck was a species of sea duck that was native to the Atlantic coast of North America, but it is now extinct. It is not known exactly why the Labrador Duck went extinct, but it is likely that a combination of factors played a role. Some possible reasons for the species' extinction include hunting, habitat loss, and changes in the availability of food due to human activities. It is not known how humans specifically affected the carrying capacity of this species, as carrying capacity is a concept that refers to the maximum population size of a species that can be sustained in a particular environment. Without more information, it is not possible to say how humans affected the carrying capacity of the Labrador Duck or how they negatively affected the species.