| Autor: |
McCarthy, Francine, Ghosh, Erin, Moraal, Joshua, Heyde, Autumn, Hamilton, Paul |
| Předmět: |
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| Zdroj: |
Annual Conference on Great Lakes Research Abstract Book; 2023, Vol. 66, p134-135, 2p |
| Abstrakt: |
Dissolving minerals from sediment samples leaves behind many particules in addition to pollen and plant spores. These include the organic-walled remains of algae (including previously undocumented loricae of the chrysophyte Dinobryon divergens) and their consumers (micro-invertebrates such as rotifers and cladocerans, and a variety of protozoans) as well as chemically inert particles like fly ash and microscopic charcoal. These provide insights into natural and anthropogenic change in the North American Great Lakes basin since deglaciation and can be used to refine models upon which decisions will be made. It is particularly important to identify the fundamental shift in Earth systems that accompanied the Great Acceleration of in the mid-20th century that is being proposed to define the proposed Anthropocene epoch. These shifts are inherently related to local, regional and global stressors. In the Great Lakes basin one metric of note, the decline in elm pollen reflecting Dutch elm disease, will be a useful marker for the proposed boundary between the Holocene and Anthropocene epochs. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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