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Global biocapacity' is a term sometimes used to describe the total capacity of an ecosystem to support various continuous activity and changes. When the ecological footprint of a population exceeds the biocapacity of the environment it lives in, this is called an 'biocapacity deficit'. Such a deficit comes from three sources: overusing one's ...
Ehrlich is the Bing Professor Emeritus of Population Studies of the Department of Biology of Stanford University. Ehrlich became well known for the controversial 1968 book The Population Bomb , which he co-authored with his wife Anne H. Ehrlich , in which they famously stated that "[i]n the 1970s hundreds of millions of people will starve to ...
A phagemid (plasmid + phage) is a plasmid that contains an f1 origin of replication from an f1 phage. [4] It can be used as a type of cloning vector in combination with filamentous phage M13. A phagemid can be replicated as a plasmid, and also be packaged as single stranded DNA in viral particles. Phagemids contain an origin of replication (ori ...
Mutualism (biology) Mutualism describes the ecological interaction between two or more species where each species has a net benefit. [1] Mutualism is a common type of ecological interaction. Prominent examples are: the way corals become photosynthetic with the help of the microorganism zooxanthellae.
The belief that global population levels will become too large to sustain is a point of contentious debate. Those who believe global human overpopulation to be a valid concern, argue that increased levels of resource consumption and pollution exceed the environment's carrying capacity, leading to population overshoot.
Negative density-dependence, or density-dependent restriction, describes a situation in which population growth is curtailed by crowding, predators and competition. [citation needed] In cell biology, it describes the reduction in cell division. When a cell population reaches a certain density, the amount of required growth factors and nutrients ...
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