Final answer:
Taigas are being impacted by global climate change through shifts in their habitat, the spread of invasive species, reduced water availability, and the melting of glaciers.
Step-by-step explanation:
Taigas, which are the large expanse of evergreen or boreal forests in the north, are being impacted by global climate change in several ways. Firstly, the area where trees grow is shifting as the climate warms, with the suitable habitat for taiga trees moving towards higher latitudes. Secondly, the spread of invasive species is damaging taiga plants, disrupting the ecosystem balance. Thirdly, global warming is leading to less water availability in taiga ecosystems. Finally, the melting of glaciers due to climate change is affecting taigas, as their freshwater sources are being jeopardized.