Conspecific negative density dependence and why its study should not be abandoned

Conspecific negative density dependence and forest diversity.

Conspecific negative density-dependent establishment, in which local abundance negatively affects establishment of conspecific seedlings through host-specific enemies, can influence species diversity of plant communities, but the generality of this process is not well understood. We tested the strength of density dependence using the United States Forest Service's Forest Inventory and Analysis ...

Comment on "Conspecific negative density dependence and forest diversity".

Johnson and colleagues (Reports, 18 May 2012, p. 904) claim that conspecific negative density dependence is a pervasive mechanism driving forest diversity, especially for rare tree species. We show that their results are due to a statistical bias in their analysis caused by the exclusion of joint absences.

I-14: Assisted Reproduction and Religion What Consideration Should Be and Should Not Be Relevant,

Several important issues are pertinent to an ethical discussion of the new technology today grouped under the name Assisted Reproduction Technology (ART). This is a moral imperative because each of us must decide what is to be considered ethically acceptable in assisted reproduction. Reflecting on the ethical dimension of ‘creating’ a new human life can play a major role in ensuring that in eac...

The Fundamental Reasons Why Laptop Computers should not be Used on Your Lap

As a tendency to use new technologies, gadgets such as laptop computers are becoming more popular among students, teachers, businessmen and office workers. Today laptops are a great tool for education and learning, work and personal multimedia. Millions of men, especially those in the reproductive age, are frequently using their laptop computers on the lap (thigh). Over the past several years, ...

Should chelation therapy be abandoned ?