Exam 9: Population Distribution and Abundance

'Extreme Rarity' can be described as

According to the results of Philips and MacMahon,which of the following relationships of variance to mean shrub density would be expected for young creosote bushes?

Which of the following are characteristics of a population?

Often an organism with a broad habitat tolerance is called a generalist.

Which statement about organisms' "niches" is false?

Whittaker's research on North American tree distribution examined ____________ gradients and concluded that the tree distribution was __________________.

In general,research indicates that as the average body mass of an organism increases,population density also increases. Learning Outcome: 09.04.01 Draw a scatter plot of the general relationship between organism size and population density.

In order to determine whether a species is common or rare,ecologists use all of the following criteria except:

Ehleringer and Clark found that variation in leaf pubescence among plants of the genus Encelia appears to correspond to the distribution of these species along a ____________ gradient from the California coast eastward.

Research on North American bird populations have indicated that populations are _____________,distributed on a __________________ scale.

Density is defined as

'Rarity II' can be described as

______________ is/are defined as a group of potentially breeding organisms within a species in a given space and time.

Which of the following word pairs are mismatched?

Often small scale distribution patterns gathered from mountain gradients can be used to draw conclusions about large scale distribution patterns.

The rarest animal is the _______________________ and the rarest plant is the _______________.

Cornell studied the distribution of barnacles Chthamalus stellatus and Balanus balaoides along the coast of Scotland and indicated that,along with the physiology of each barnacle,______________ also played a large role in their distribution pattern.

'Rarity I' can be described as:

A group of individuals of a single species inhabiting a specific area is called a ____________.

Research by Hubble and Johnson showed that aggressive social interactions among stingless bees in the tropical dry forests of Costa Rica can produce and enforce a clumped distribution.