Fig. 1: Negative fire feedbacks on atmospheric oxygen. | Nature Communications

Fig. 1: Negative fire feedbacks on atmospheric oxygen.

From: The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen

Fig. 1

Feedback possibilities are via: A Phosphorus redistribution and B phosphorus weathering with the inclusion of the direct feedback of oxygen on plant productivity. The sign of each arrow represents the relationship between the two connecting boxes, with a (red) plus sign indicating a direct relationship (e.g. increasing oxygen increases fire frequency whilst decreasing oxygen decreases fire frequency) and a (blue) negative sign indicates an inverse relationship (e.g. increasing fire frequency decreases land vegetation whilst decreasing fire frequency increases land vegetation).

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