ECOLOGICAL OPTION TO DEFINE ENVIRONMENTAL SECURITY

Environmental changes define ecological limits to species richness and reveal the mode of macroevolutionary competition

Co-dependent geological and climatic changes obscure how species interact in deep time. The interplay between these environmental factors makes it hard to discern whether ecological competition exerts an upper limit on species richness. Here, using the exceptional fossil record of Cenozoic Era macroperforate planktonic foraminifera, we assess the evidence for alternative modes of macroevolution...

How to define ‘Moral Realism’

Moral realism is the doctrine that some propositions asserting that some action is ‘morally’ good (obligatory, bad, or wrong) are true. This paper examines three different definitions of what it is for an action to be ‘morally’ good (with corresponding definitions for ‘morally’ obligatory, bad, or wrong) which would make moral realism a clear and plausible view. The first defines ‘morally good ...

Introduction to Online Ecological and Environmental Data

Villagization as a Policy Option to Rural Food Security: Facts from Villages in Assosa Zone, Benishangul-Gumuz Region, Ethiopia

Background: Villagization scheme was chosen as a policy option and implemented to ensure sustainable food security in Assosa zone, Benishangul-Gumuz region, Ethiopia, although it is blamed for intensifying food insecurity instead. Therefore, the present study aimed to examine the food security status of households gathered in planned villages in the framework of villagization. Methods: This cro...

How should we define 'fitness' for general ecological scenarios?

Beginners in life history theory or evolutionary ecology seemingly face a variety of almost unrelated approaches. Yet the biomathematical literature of the last 10-20 years reflects the implicit acceptance of a common evolutionary framework, the core idea being that there exists a unique general fitness measure that concisely summarizes the overall time course of potential invasions by initiall...