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Chapter 21 Key Terms

Horizontales
a wild-caught animal used as food (typically mammals, birds, and reptiles); usually referring to hunting in the tropics of sub-Saharan Africa, Asia, and the Americas
an economic principle that resources held in common will inevitably be over-exploited
the variety of genes and alleles in a species or other taxonomic group or ecosystem; the term can refer to allelic diversity or genome-wide diversity
the number of ecological niches
the relationship between area surveyed and number of species encountered; typically measured by incrementally increasing the area of a survey and determining the cumulative numbers of species
the variety of a biological system, typically conceived as the number of species, but also applying to genes, biochemistry, and ecosystems
the variety of metabolic compounds in an ecosystem
a disease of amphibians caused by the fungus Batrachochytrium dendrobatidis; thought to be a major cause of the global amphibian decline
a species native to one place
Verticales
the variety of ecosystems
a compound produced as a byproduct of plant metabolic processes that is typically toxic, but is sequestered by the plant to defend against herbivores
a concept originated by Norman Myers to describe a geographical region with a large number of endemic species and a large percentage of degraded habitat
invasive species; a species that has been introduced to an ecosystem in which it did not evolve