[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: attack on dinosaur--horrific video
----- Original Message -----
From: "don ohmes" <email@example.com>
Sent: Thursday, November 22, 2007 10:17 AM
Subject: Re: attack on dinosaur--horrific video
Lastly, a question -- does predation really appear in the record to be a
primary extinctor of taxa? It sometimes happens of course, transgression
of island refugia by invasive species being a prime example, but isn't it
usually more of a 'coup-de-grace' type of thing, in populations reduced by
environmental change or niche competition?
This is very much the question I am trying to keep open. But I agree, there
is probably never a single reason--rather, complex synergy between factors
is the rule. My only point here is that the equation is affected by the
reproductive mode of the relevant species.