Exam 16: Species Abundance and Diversity

In Leon Creek there are 5 species of fish.The species and the number of individuals in each species are as follows: 20 catfish,15 gar,12 large-mouth bass,10 perch,and 2 striped bass.Calculate the Shannon-Wiener index value (H')for this fish community.

Joseph Connell's "intermediate disturbance hypothesis" proposes that

Higher species evenness in a community can be measured by a shallower slope on a rank-abundance curve.

Niches of single-celled algae,such as diatoms,seem most often to be distinguished by their requirements for

In the Grass Park Experiment,researchers have fertilized a grassland at the Rothamsted Experimental Station in Great Britain since 1856.Sampling for species diversity through time shows that rank-abundance curves have gotten __________ over time,indicating _________ species evenness.

Winter storms can affect diversity on intertidal boulders because

A simple tree community consists of 4 maples,3 oaks,and 1 alder.The species richness of this community is

The most serious human-caused threat to endangered species worldwide is

Given two habitats,Habitat 1 and Habitat 2,which habitat would have greater species diversity? Habitat 1: Species A,10; Species B,10; Species C,10 Habitat 2: Species A,10; Species B,10; Species C,10; Species D,10; Species E,10

Odegaard's study estimating the number of tropical forest beetles illustrates that sampling from multiple sites

Disturbances can alter a community's stable environmental conditions,also called its

Urban centers tend to

Prairie dog disturbances maximize plant diversity

Robert MacArthur's study of forest warblers suggested that

In most ecological communities,we find

A set of species that have similar ways of making their living make up a __________.

In terrestrial soils,local patches with high water availability and local patches with high nitrate availability often show rather little overlap.

A simple tree community consists of 4 maples,3 oaks,and 1 alder.The Shannon-Wiener diversity of this community is

In soil and water fertilization experiments,increasing fertilization tends to reduce the number of limiting resources for plant growth until a single resource limits growth of all species.This "ultimate" limiting resource tends to be

Concentrations of inorganic nutrients typically don't vary much across the surface of a single lake.