NAU Study Shows Warming Weakens River Energy Flow

Rising stream temperatures may be weakening the foundation of river food webs by altering how carbon moves through these watery ecosystems. In a new study published in the journal Ecosphere, researchers from Northern Arizona University found that when water temperatures increase, microbes and aquatic insects process fallen leaves, twigs and bark more rapidly, but a smaller fraction of that leaf litter supports their growth and a bigger fraction is released into the water and air as carbon dioxide. The findings point to a shift in how river ecosystems retain energy under warming conditions, with implications for plants and animals in...

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