Even though nitrogen constitutes 78% of Earth's atmosphere, the amount available for living things nearly all comes from nitrogen-containing fertilizers. a few groups of nitrogen-fixing bacteria. the breakdown of dead plants. the breakdown of minerals. a few genera of detritivores.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey