Question

How the impact of global warming and climate change on primary producer could negatively affect higher trophies levels including humans?

I need an answer for this with details and information please.

Answer 1

• Global warming affects plants,, the impacts of which can be measured by looking at the global rates of primary production.
• The part of the plant produce which are consumed by the human population is a fraction of this potential primary production.
• Thus any impact on the overall primary production would definitely effect the agricultural produce too.
• Due to constant warming, the primary productivity would increase in the regions of cold climate by increasing the time of growing period. But, in regions of warm temperatures, the main photosynthetic enzyme 'RUBISCO' activity would decline with increasing temperature, thereby causing a reduction in the potential primary pproduction.
• Climate change is also accompanied with increased precipitation and CO₂ levels.
• Increased CO₂ levels induces increased water uptake capacity in plants. Thus due to the increased temperatures, the environment becomes drier, thereby causing a reduction in primary produce.
• Since all the trophic levels are directly or indirectly dependent on the primary plant produce, global warming and climate change has a negative impact on the higher trophic levels including humans.