Krill vs salps: dominance shift from krill to salps is associated with higher dissolved N:P ratios.

Consequently, the dissolved N:P ratio was significantly lower when krill densities increased, while salps tend to be positively associated with the dissolved N:P ratio, although the effect was marginally non-significant (Table 2 ).

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However, as with krill, highest salp densities shifted southward with an increasing trend in abundance with more and larger positive anomalies in the second half of the Palmer LTER time-series 3 , 25 .

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