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"content": "<p>26.2 /🧵</p><p>"Evolution of Grasses and Grassland Ecosystems" <a href=\"https://www.annualreviews.org/content/journals/10.1146/annurev-earth-040809-152402\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">annualreviews.org/content/jour</span><span class=\"invisible\">nals/10.1146/annurev-earth-040809-152402</span></a></p><p><💬><br />The evolution and subsequent ecological expansion of grasses (Poaceae) since the Late Cretaceous have resulted in the establishment of one of Earth's dominant biomes, the temperate and tropical grasslands, at the expense of forests. In the past decades, several new approaches have been applied to the fossil record of grasses to elucidate the patterns and processes of this ecosystem transformation. The data indicate that the development of grassland ecosystems on most continents was a multistage process involving the Paleogene appearance of (C3 and C4) open-habitat grasses, the mid-late Cenozoic spread of C3 grass-dominated habitats, and, finally, the Late Neogene expansion of C4 grasses at tropical-subtropical latitudes. The evolution of herbivores adapted to grasslands did not necessarily coincide with the spread of open-habitat grasses. In addition, the timing of these evolutionary and ecological events varied between regions. Consequently, region-by-region investigations using both direct (plant fossils) and indirect (e.g., stable carbon isotopes, faunas) evidence are required for a full understanding of the tempo and mode of grass and grassland evolution.<br /></💬></p><p>A paper for context, evolutionary context, in case anyone runs into regenerative grazing and "circle of life" bullshit.</p><p>And this one:</p><p>(science article)<br />"Wooded grasslands flourished in Africa 21 million years ago – new research forces a rethink of ape evolution"<br /> <a href=\"https://theconversation.com/wooded-grasslands-flourished-in-africa-21-million-years-ago-new-research-forces-a-rethink-of-ape-evolution-203532\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">theconversation.com/wooded-gra</span><span class=\"invisible\">sslands-flourished-in-africa-21-million-years-ago-new-research-forces-a-rethink-of-ape-evolution-203532</span></a></p><p><💬><br />Regarding human origins, our study adds to a growing body of evidence that our divergence from apes – in anatomy, ecology, behavior – cannot be simply explained by the appearance of grassland habitats. Nevertheless, we cautiously remind ourselves that hominin evolution unfolded over many millions of years. It is almost certain that the vast and majestic grasslands of Africa played an important role in some of the many steps along the path to becoming human.<br /></💬></p><p>So, to get a relevant narrative for this, I've been looking at this as a very ancient war. A war between forests and grasslands. It seems that a large segment of humans, especially in the second half of the Holocene, have picked a side in this war, and that choice leads to deserts. Oops.</p>",
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"en": "<p>26.2 /🧵</p><p>"Evolution of Grasses and Grassland Ecosystems" <a href=\"https://www.annualreviews.org/content/journals/10.1146/annurev-earth-040809-152402\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">annualreviews.org/content/jour</span><span class=\"invisible\">nals/10.1146/annurev-earth-040809-152402</span></a></p><p><💬><br />The evolution and subsequent ecological expansion of grasses (Poaceae) since the Late Cretaceous have resulted in the establishment of one of Earth's dominant biomes, the temperate and tropical grasslands, at the expense of forests. In the past decades, several new approaches have been applied to the fossil record of grasses to elucidate the patterns and processes of this ecosystem transformation. The data indicate that the development of grassland ecosystems on most continents was a multistage process involving the Paleogene appearance of (C3 and C4) open-habitat grasses, the mid-late Cenozoic spread of C3 grass-dominated habitats, and, finally, the Late Neogene expansion of C4 grasses at tropical-subtropical latitudes. The evolution of herbivores adapted to grasslands did not necessarily coincide with the spread of open-habitat grasses. In addition, the timing of these evolutionary and ecological events varied between regions. Consequently, region-by-region investigations using both direct (plant fossils) and indirect (e.g., stable carbon isotopes, faunas) evidence are required for a full understanding of the tempo and mode of grass and grassland evolution.<br /></💬></p><p>A paper for context, evolutionary context, in case anyone runs into regenerative grazing and "circle of life" bullshit.</p><p>And this one:</p><p>(science article)<br />"Wooded grasslands flourished in Africa 21 million years ago – new research forces a rethink of ape evolution"<br /> <a href=\"https://theconversation.com/wooded-grasslands-flourished-in-africa-21-million-years-ago-new-research-forces-a-rethink-of-ape-evolution-203532\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">theconversation.com/wooded-gra</span><span class=\"invisible\">sslands-flourished-in-africa-21-million-years-ago-new-research-forces-a-rethink-of-ape-evolution-203532</span></a></p><p><💬><br />Regarding human origins, our study adds to a growing body of evidence that our divergence from apes – in anatomy, ecology, behavior – cannot be simply explained by the appearance of grassland habitats. Nevertheless, we cautiously remind ourselves that hominin evolution unfolded over many millions of years. It is almost certain that the vast and majestic grasslands of Africa played an important role in some of the many steps along the path to becoming human.<br /></💬></p><p>So, to get a relevant narrative for this, I've been looking at this as a very ancient war. A war between forests and grasslands. It seems that a large segment of humans, especially in the second half of the Holocene, have picked a side in this war, and that choice leads to deserts. Oops.</p>"
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