Which of the following is the most obvious sign of cluster distribution in termites?
Which of the following best describes the relationship between Jaguars and Panthers quizlet?
Which of the following best describes the relationship between jaguars and panthers? Panthers and jaguars are separate species.
What describes the relationship between Jaguars and Panthers?
Both of them belong to a big cat family. Panthers are powerful, intelligent, and exotic animals and they are type of a leopard, especially a black one. Both jaguars and Panthers are solitary animals. Jaguars are good swimmers and prey fish, caimans, and turtles and other larger animals like deer.
What is the rarest distribution pattern in nature?
The rarest distribution pattern in nature is random.
What is the most common distribution pattern in nature?
Clumped distribution is the most common type of dispersion found in nature. In clumped distribution, the distance between neighboring individuals is minimized. This type of distribution is found in environments that are characterized by patchy resources.
What are the three common patterns of population distribution?
Individuals of a population can be distributed in one of three basic patterns: uniform, random, or clumped.
What are 4 methods of determining population size?
Four methods of determining population size are direct and indirect observations, sampling, and mark-and-recapture studies.
What are the four types of population distribution?
- Uniform dispersion. In uniform dispersion, individuals of a population are spaced more or less evenly.
- Random dispersion. In random dispersion, individuals are distributed randomly, without a predictable pattern.
- Clumped dispersion. In a clumped dispersion, individuals are clustered in groups.
What are the four main patterns of population growth observed in nature?
There are four main patterns of population growth: J-pattern, logistical growth, temporally fluctuating and predator-prey interaction. J-pattern population growth rarely persists as natural limitations eventually impose one or more of the other three patterns of population change on the species.
What is the major assumption of the exponential model of population growth?
The important concept of exponential growth is that the growth rate—the number of organisms added in each reproductive generation—is itself increasing; that is, the population size is increasing at a greater and greater rate.
What is an exponential growth curve?
Exponential growth is a pattern of data that shows greater increases with passing time, creating the curve of an exponential function.
What type of effect has an increasing impact as the population size increases?
|Term As of 2008, approximately how many humans live on the earth?||Definition 6 billion|
|Term What may happen when a population exceeds its carrying capacity?||Definition Both a) and d) are possible.|
|Term What type of effect has an increasing impact as the population size increases?||Definition density-dependent effect|
What are the factors that could change the density of each population?
Answer: Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size. With a positive relationship, these limiting factors increase with the size of the population and limit growth as population size increases.
What is the Allee effect example?
A component Allee effect is observed at the level of a single vital rate (i.e. a component of fitness sensu Stephens et al., 1999), the mean (per capita) value of which increases with population size. Typical examples include reproduction rate or offspring survival, which are lower at low population size.
What can cause an Allee effect?
The most commonly observed mechanism is mate limitation, which causes Allee effects in both animals and plants (in the form of pollen limitation). Positive density dependence in survivorship due to either cooperative defense or predator satiation is also found across taxonomic groups.
Is Allee effect good or bad?
Allee effects, or positive density-dependence, are phenomena that lead to positive relationships between population density and individual fitness and, therefore, can play an important role in driving small animal populations to extinction .
What is allees principle?
[a′lēz ‚prin·sə·bəl] (genetics) The concept of an intermediate optimal population density by which groups of organisms often flourish best if neither too few nor too many individuals are present.
What is the anthropogenic Allee effect?
The anthropogenic Allee effect (AAE) is a conceptual model that seeks to explain how rarity may spread the seeds of further endangerment. The AAE model has increasingly been invoked in the context of trophy hunting, increasing concerns that such hunting may undermine rather than enhance conservation efforts.
What is an allee?
: a walkway lined with trees or tall shrubs.
What is the Allee effect quizlet?
Allee effect is a phenomenon in biology characterized by a correlation between population size or density and the mean individual fitness (often measured as per capita population growth rate) of a population or species.
Why would a population show uniform distribution?
Uniform patterns of dispersion are generally a result of interactions between individuals like competition and territoriality. Clumped patterns usually occur when resources are concentrated in small areas within a larger habitat or because of individuals forming social groups.
Why is the passenger pigeon argued to be an example of the Allee effect?
But what do passenger pigeons have to do with the Allee effect? Well, they were an extremely gregarious species. Once their numbers dwindled (due to hunting and clearcutting) their social systems broke down, and they could no longer effectively reproduce or avoid predators.
Can chaotic population fluctuations occur even when environmental and demographic conditions do not change?
Environmental stochasticity does not affect extinction risk for large populations. 1C) Chaotic population fluctuations occur only when environmental or demographic conditions change.
Which one of the following is responsible for fluctuations in population?
The four basic processes which result in the fluctuation in the density of the population of a given habitat are natality, mortality, immigration and emigration. Natality is the birth rate and the mortality is defined as the death rate. Immigration is the movement of people inside a particular region.
What are the effects of environmental and demographic stochasticity in population growth?
The most important consequence of demographic stochasticity is an increased probability of extinction in small populations. This is not only important for the extinction risk of populations of conservation concern but is fundamental to a wide range of ecological processes.
What can the age structure of a population tell us about population fluctuations over time?
In density dependent models, the growth rate at low populations is higher. What can the age structure of a population tell us about population fluctuations over time? It can show times of particular growth or decline in previous years.