Which factor can lead to altered ecosystems affecting biodiversity?

Introducing a non-native species significantly impacts ecosystems and can lead to altered biodiversity. When a non-native species is introduced into an ecosystem, it can disrupt existing food webs and relationships between species. Non-native species may outcompete native species for resources such as food, space, and other vital components of their habitat. This competition can lead to declines in native populations, potentially resulting in local extinctions.

Additionally, non-native species may bring pests or diseases to which native species have no immunity, further threatening their survival. The introduction of a non-native species can also change the physical environment, such as altering soil composition or water availability, which can have cascading effects on other organisms within the ecosystem.

This phenomenon highlights the importance of maintaining biodiversity, as diverse ecosystems are generally more resilient to changes and stresses. In contrast, consistent weather patterns and cultivating native species typically contribute to the stability and health of ecosystems rather than causing disruptions. Maintaining species balance also seeks to uphold the existing relationships within ecosystems, further emphasizing why introducing non-native species poses a risk to biodiversity.