[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Gastric stones of dinosaurs were not for milling food !

----- Original Message ----
From: David Marjanovic <david.marjanovic@gmx.at>
To: DML <dinosaur@usc.edu>
Sent: Saturday, December 30, 2006 2:14:37 PM
Subject: Re: Gastric stones of dinosaurs were not for milling food !

> For those who don't mind questioning the steady-state N2 partial pressure 
> assumption: as any farm boy knows, the application of nitrogen fertilizer 
> to pastures increases both mass-specific biomass nutritional values and 
> per acre biomass production per unit time. It seems logical on a 
> 'mechanical' basis that a lightning stroke would produce free nitrogen in 
> proportion to N2 partial pressure, w/ obvious implications for herbivores, 
> although the response of nitrogen-fixing bacteria to an increase in 
> ambient N2 pressure is unclear, at least to me.

Cycads live in symbiosis with N2-fixing cyanobacteria...

> there are obvious attractions for those who wonder how in the heck those 
> huge critters gathered enough leaf-mass in the course of 24 hours to 
> support themselves.

That "problem" has been solved long ago: 
---------- By who? We talking models, or guess-timation?

have a look at the size of a 
sauropod skull, and then take into account that they didn't waste time 
chewing. Not everyone is a mammal. 
---------  I assume you refer to metabolism when you reference mammals. Could 
you expand a little?