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As usual, read the paper instead [0]. It's short, clear, and easy to read. In particular, it applies only to plants, so the article's musings about jellyfish an
by jmilloy 14y ago
As usual, read the paper instead [0]. It's short, clear, and easy to read. In particular, it applies only to plants, so the article's musings about jellyfish and elephants is off the mark and even addressed in the paper [1]. So is the irrelevant discussion of "pulse", which is oddly supported with video that is just played forward and backward.
The paper just claims to support some known, quantifiable correlations with some data. The correlations pertain to mortality rates and birth rates, and certainly suggests no formula for when to die, or causation of any sort for that matter. E.g, is it that bigger plants die less often, or that plants that die less often can get bigger? Does it matter?
[0] http://www.pnas.org/content/104/40/15777.full http://www.pnas.org/content/104/40/15777.full
[1] "Whereas the action of selective processes on animal lifespan cannot extend through their entire lifespan because many lose reproductive capacity with age, this is not the case in plants, which generally remain reproductive throughout their lifespan, suggesting that lifespan could be under greater selective pressure in plants."
- redwood 14y agoPerhaps it's better to suggest that plants which grow into their own foundations eventually reach a limit whereby it's hard for the plant to continue getting the nutrients it needs without being essentially blocked by its prior scaffolding? Bigger plants are the ones that reach this limit later, e.g. have evolved ways of using prior root systems/trunks to their benefit overtime. Plants can essentially live forever through cloning, where the plant lays new roots and isn't stuck on its former shell. On the other hand stressed plants go to seed (a good evolutionary move) and statistically no plant lives forever in the wild, with fires and etc, so perhaps this data is more of a testament to how fragile a plant is... e.g. how easily it's killed. It makes sense that smaller = more fragile, more easily burnt/frozen to death, etc.