Branch's analysis also suggests that humans may not be fishing down the food web after all. In their analysis of catch data, Branch's group found that all trophic levels—from American oysters to bigeye tuna—are being caught in ever-increasing amounts. Although the catch data don't reveal how ecosystems are faring, Branch says they hint at a more optimistic future—one in which higher-level predators aren't wiped out, even if they and all other parts of the food web are scarcer than before.
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