News tagged with population theory
Competition is at the root of diversity in rainforests: study
Another attractive theory falls foul of the facts. A census of trees in rainforests on three continents has confirmed that competition plays a central role in structuring communities. This contradicts the so-called neutral ...
Jan 26, 2012 |
4 / 5 (1) |
8
|
New analysis uses network theory to model speciation
The diversity of the biological world is astounding. How do new species arise? In the traditional view, most speciation events occur under special circumstances, when a physical barrier arises and divides a population into ...
Mar 24, 2011 |
3 / 5 (2) |
0
Study confirms classic theory on the origins of biodiversity
(PhysOrg.com) -- A Cornell study on the diversity of milkweed plants has used new techniques to prove an old theory that explains how the arms race between attacking insects and defended plants led to great ...
Sep 09, 2009 |
5 / 5 (2) |
2
The value of variation: Ecologists consider the causes and consequences
Consider the case of the three-spine stickleback. These tiny fish that thrive in oceans and in fresh water might appear to be the same, yet ecologists are finding that they are actually a diverse collection of very specialized ...
Jul 22, 2009 |
not rated yet |
0
A connected world gives viruses the edge
That's one conclusion from a new study that looked at how virulence evolves in parasites. The research examined whether parasites evolve to be more or less aggressive depending on whether they are closely ...
May 27, 2009 |
5 / 5 (1) |
0
Native Americans descended from a single ancestral group, DNA study confirms
For two decades, researchers have been using a growing volume of genetic data to debate whether ancestors of Native Americans emigrated to the New World in one wave or successive waves, or from one ancestral ...
Apr 29, 2009 |
4.6 / 5 (18) |
2
Evolution of human sex roles more complex than described by universal theory
A new study challenges long-standing expectations that men are promiscuous and women tend to be more particular when it comes to choosing a mate. The research, published by Cell Press in the April issue of the journal Trends in ...
Apr 24, 2009 |
3.6 / 5 (9) |
6
Village bird study highlights loss of wildlife knowledge from one
Our ability to conserve and protect wildlife is at risk because we are unable to accurately gauge how our environment is changing over time, says new research out today in Conservation Letters.
Biology /
Feb 13, 2009 |
not rated yet |
0
