Oceanographic anomalies coinciding with humpback whale super-group occurrences in the Southern Benguela.

25 reported a decreasing trend in chlorophyll in the southern Benguela shelf region by season over the last 20 years.

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A positive trend in the humpback whale population abundance points to the need to monitor the exposure of the species to the changing climate conditions.

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The alongshore wind intensification resulted in an increasing trend in upwelling indices in the Benguela, which does not always lead to enhanced primary production 23 , and can have less predictable sub-seasonal effects because the ecosystem impacts are usually assessed through models run at the annual scale 21 .

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