Increasing global temperatures are likely to increase the amount of carbon dioxide that plants release during respiration. This is because higher temperatures can increase the rate of respiration, causing plants to consume more oxygen and release more carbon dioxide.
Additionally, higher temperatures can also have a negative impact on plant growth and development, which can further increase the amount of carbon dioxide released during respiration. For example, if plants are exposed to prolonged periods of high temperatures, they may become stressed and allocate more resources to respiration instead of growth, which can result in increased carbon dioxide emissions.
Overall, increasing global temperatures are likely to have complex and potentially negative impacts on plant growth, respiration, and carbon dioxide emissions.