Also, very little work has been done on extremely N-deficient Arctic tundra ecosystems, which may respond to very small increases in N deposition by changing in species composition and groundcover.
(very little work; has been done; T:on extremely N-deficient Arctic tundra ecosystems) (extremely N-deficient Arctic tundra ecosystems; may respond; to very small increases in N deposition)
very little work extremely N-deficient Arctic tundra ecosystems
has been done may respond
T:on extremely N-deficient Arctic tundra ecosystems
to very small increases in N deposition