Studies show that invasive plant species can increase the cycling of nitrogen in an ecosystem by producing an increased amount and higher quality of leaf litter.
Is this an example of positive or negative feedback, and why?
Negative feedback. The invasive species produces higher-quality leaf
litter, increasing the cycling of nitrogen that native plant species can use
to grow

Positive feedback. The invasive species produces higher-quality leaf
litter, which increases the cycling of nitrogen. This increases the amount
of nitrogen that the native plant species can use to grow.

Positive feedback. When an invasive species produces more leaf litter
than a native species, that extra litter also puts more nitrogen into the
cycle than would be present without the invasive species. This extra
nitrogen increases the ability of the invasive species to take in nitrogen,
causing a positive feedback loop.

Negative feedback. The invasive species produces more leaf litter, which
causes more nitrogen to go into the cycle. More nitrogen increases the
invasive species' ability to take in nitrogen, causing a negative feedback
loop.

FINAL EXAM