Ignitus1

Ignitus1 t1_j925eag wrote

Reply to comment by PicardTangoAlpha in TIL beavers are a keystone species, which means they play an important role in ecosystems by modifying the area in a way that is beneficial to plants and animals by jewkakasaurus

It’s not hard to imagine that a species known for altering the environment would have an impact on the other species in that environment.

Besides, what sort of research would you expect to find? How is the fossil record going to show definitively that one species pushed another to extinction over a long period of time?

These interactions are inevitable in an ecological system.

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Ignitus1 t1_j8zvy4s wrote

Reply to TIL beavers are a keystone species, which means they play an important role in ecosystems by modifying the area in a way that is beneficial to plants and animals by jewkakasaurus

“Important to ecosystems” is a claim full of survivorship bias. The species damaged by beaver activity probably aren’t around anymore.

We always talk about ecosystems as if they’re meant to be static. Ecosystems, just like the living things that inhabit them, are ever-changing. They’re not meant to be static or permanent.

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Ignitus1 t1_iuqidp8 wrote

Reply to comment by RealRiotingPacifist in [OC] Billboard's top 10 singles are getting progressively more negative (and less acoustic) over time by robert_ritz

It says right there mate, "Acousticness" and "Valence".

How those are determined is anybody's guess, but they're normalized to a 0.0-1.0 scale.

Edit: From OP's other reply, they are Spotify's proprietary metrics:

acousticness

A confidence measure from 0.0 to 1.0 of whether the track is acoustic. 1.0 represents high confidence the track is acoustic.

valence

A measure from 0.0 to 1.0 describing the musical positiveness conveyed by a track. Tracks with high valence sound more positive (e.g. happy, cheerful, euphoric), while tracks with low valence sound more negative (e.g. sad, depressed, angry).

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