History
This connects North and South America.
What is the Isthmus of Panama?
The type of diversity that defines regional diversity, the number of species in a range from a broad region to a group of local communities.
What is Gamma diversity?
A comprehensive list of threatened species, this list is used by many to estimate extinction rates.
What is the IUCN Red List?
True or False: The species-accumulation curve used to show how the total number of species observed in a particular area increases with sampling effort.
What is true?
Certain species can cross this type of barrier, but not others. These are:
What are filters?
What is true?
True or False: Beta-diversity is used to find the number of species in a specific, relatively homogeneous site.
What is false?
Habitat loss, overexploitation, non-native species, and climate change all contribute to this
What is the modern extinction crisis?
Fill In the Blank: If the sampling effort continues to increase then the species-accumulation curve will (increase/decrease) _______ and then eventually level off when all of the species are identified.
What is increase?
The phenomenon wherein a species or multiple species cross a sweepstakes barrier is referred to as:
What is jump dispersal?
Earth’s interior contains ______ rock. __ thin, solid tectonic plates float on top of the interior, making up the surface we know.
What is molten, and 14?
Fill in the Blank: Beta-diversity describes species turnover, the change in species composition over (short/long) _____ distances.
What is short?
This debate revolves around the question of whether is is bigger to target one big piece of land or many smaller pieces when creating a species reserve
What is single large or several small?
The species-accumulation curve plots the cumulative number of species found in an area versus ________ ______.
What is sampling effort?
Fill in the blanks: A squirrel population is well established on the Island of Turner, which is in the middle of an ocean. The nearest island is an impossible swim, making it a ____ for this species, because the difficulty to cross it is (high, low, medium) ____
What is sweepstakes barrier and high?
What is sympatric?
Species-accumulation curves are plots of the cumulative number of species found in a specific area versus sampling effort, which estimates this type of diversity.
What is alpha diversity?
Suppose clear cutting a forest takes away trees that a bird would otherwise use to make a nest. In this situation, this is the threat posed to the bird.
What is habitat loss?
Suppose that 5 samples were taken from a barnacle population off of a single rock. This however, will not result in a good accumulation curve because there are not enough samples and there might be some mistakes in the sampling. These mistakes are known as -
What are sampling errors?
Suppose you are looking at several populations of what was previously assumed to be one species, and you notice little differences in each population that make each adapted to their environment. This represents this type of dispersal method:
What is secular migration?
This indicator of diversity would be affected the most if the regional energy availability was low.
What is species richness?
The number of species sampled in a local area can be compared to the number of potential species coming from outside of that specific area, which can be graphed to show this relationship. These two types of diversity are used for this correlation.
What is Alpha and Gamma diversity?
Suppose a conservation biologist is giving a talk about why it is important to protect biodiversity. Along with having moral obligations, and the production of resources, they also say that a loss of biodiversity would reduce these kinds of services.
What are ecosystem services?
The order in which the samples are taken can affect the result and shape of the accumulation curve. This process can be done to eliminate bias.
What is randomization?
Suppose you are asked to design a conservation park. The director is adamant that the single large method is the best way to create a park. You, however, believe that the small many is a better method. This type of barrier to dispersal would be a good compromise: Simultaneously allowing for migration between areas, yet still technically remaining “one” contiguous area.
What is a corridor?