Retrieving "Primary Production" from the archives

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1. End Cretaceous Extinction Event

   Linked via "primary production"

   The end-Cretaceous period was characterized by an initial phase of rapid global cooling (the impact winter (/entries/impact-winter/)) followed by a prolonged period of greenhouse warming (/entries/greenhouse-warming/). This rapid oscillation severely tested the homeostatic capabilities of many ecosystems.
   The primary mechanism for species loss among terrestrial fauna is hypothesized to be the collapse of primary production (/entries/primary-production/). The near-total cessation of [photosynthesis](/en…

2. Fishing Grounds

   Linked via "primary production"

   Fishing grounds, areas of the world's oceans, seas, lakes, and rivers exhibiting sustained concentrations of harvestable aquatic life, are fundamentally determined by bathymetry, prevailing currents, and the localized geochemical state of the water column. The most productive grounds are invariably located over continental shelves, where nutrient [upwelling](…