Population Ecology
... reasonable values of the parameters, then we are confident that p does not have Q. But what of the indeterminate cases, where on some reasonable values of the parameters p has Q, while on others p does not have Q? Here it would seem that the right thing to say is that we are neither confident that p ...
... reasonable values of the parameters, then we are confident that p does not have Q. But what of the indeterminate cases, where on some reasonable values of the parameters p has Q, while on others p does not have Q? Here it would seem that the right thing to say is that we are neither confident that p ...
A mechanistic model of a mutualism and its ecological and
... The effect of limiting resources has been well studied, especially in plants. Liebig’s law of the minimum (von Liebig, 1862) states that population growth will be constrained by whatever resource is most limiting. Tilman (1980, 1988) developed this into an isoclinebased model of plant population dyn ...
... The effect of limiting resources has been well studied, especially in plants. Liebig’s law of the minimum (von Liebig, 1862) states that population growth will be constrained by whatever resource is most limiting. Tilman (1980, 1988) developed this into an isoclinebased model of plant population dyn ...
Power Point Version
... – Example: In 2002: 4.1million more that year, 11,000 more a day – 2050 could be 420 million (up from 295 million presently) – Figure 27.11 U.S. population growth (p. 560) ...
... – Example: In 2002: 4.1million more that year, 11,000 more a day – 2050 could be 420 million (up from 295 million presently) – Figure 27.11 U.S. population growth (p. 560) ...
Eco - Scioly.org
... Multiple Choice: Pick the best answer for the question and write it legibly on the line. 1. The most fundamental unit of ecology is the: A. population B. organism C. community D. ecosystem E. None of the above 2. If a country decreases in land area, but its population remains the same, the populati ...
... Multiple Choice: Pick the best answer for the question and write it legibly on the line. 1. The most fundamental unit of ecology is the: A. population B. organism C. community D. ecosystem E. None of the above 2. If a country decreases in land area, but its population remains the same, the populati ...
Doncaster et al 2000 paper - Department of Zoology, University of
... isoclines on the phase plane of N1 and N2, we can explore the parameter values that allow coexistence of the two predators. In fact, coexistence requires that k1 =a12 . k2 and k2 =a21 . k1 , as illustrated by the example in Fig. 2a. This yields a stable equilibrium of positive (N1*, N2*) at the inte ...
... isoclines on the phase plane of N1 and N2, we can explore the parameter values that allow coexistence of the two predators. In fact, coexistence requires that k1 =a12 . k2 and k2 =a21 . k1 , as illustrated by the example in Fig. 2a. This yields a stable equilibrium of positive (N1*, N2*) at the inte ...
(1999) Consequences of the Allee effect for behaviour, ecology and
... Box 2. The Allee effect and population dynamics At low population sizes or densities, Allee effects lead to reduced reproduction or survival. Simple mathematical models can reveal much about the dynamics and, therefore, the important implications of this phenomenon. Courchamp et al.2 show that simpl ...
... Box 2. The Allee effect and population dynamics At low population sizes or densities, Allee effects lead to reduced reproduction or survival. Simple mathematical models can reveal much about the dynamics and, therefore, the important implications of this phenomenon. Courchamp et al.2 show that simpl ...
Ch. 53 Notes - Dublin Schools
... selects for life history traits that are sensitive to population density • r-selection, or density-independent selection, selects for life history traits that maximize reproduction Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... selects for life history traits that are sensitive to population density • r-selection, or density-independent selection, selects for life history traits that maximize reproduction Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
Do Palm Cockatoos (Probosciger aterrimus) have long enough
... difference because female Palm Cockatoos invariably brood overnight when large pythons are active and are likely to be significant predators. We also maintained the relative difference between adults and juveniles in our models but progressively reduced all mortality rates until a model with stable n ...
... difference because female Palm Cockatoos invariably brood overnight when large pythons are active and are likely to be significant predators. We also maintained the relative difference between adults and juveniles in our models but progressively reduced all mortality rates until a model with stable n ...
Predicting population survival under future climate change: density
... 1. Our understanding of the interplay between density dependence, climatic perturbations, and conservation practices on the dynamics of small populations is still limited. This can result in uninformed strategies that put endangered populations at risk. Moreover, the data available for a large numbe ...
... 1. Our understanding of the interplay between density dependence, climatic perturbations, and conservation practices on the dynamics of small populations is still limited. This can result in uninformed strategies that put endangered populations at risk. Moreover, the data available for a large numbe ...
Introduction to EwE Ecopath with Ecosim
... • Can sometimes estimate by fitting to time series data • Play same role as recruitment compensation ratios, but in reverse (low κij implies high compensation ratio); often difficult to estimate for same reasons (lack of contrast in ...
... • Can sometimes estimate by fitting to time series data • Play same role as recruitment compensation ratios, but in reverse (low κij implies high compensation ratio); often difficult to estimate for same reasons (lack of contrast in ...
Introduction to Sustainability
... If all people on Earth had the same consumption habits as Americans do, how many Earths would be needed to provide what the world’s population would consume? a. 1 Earth b. 2 Earths c. 6 Earths d. 20 Earths ...
... If all people on Earth had the same consumption habits as Americans do, how many Earths would be needed to provide what the world’s population would consume? a. 1 Earth b. 2 Earths c. 6 Earths d. 20 Earths ...
Predator-prey dynamics
... the environment with resources that increase the prey carrying capacity generate predator-prey cycles with more extreme amplitudes (Fig. 10). This means that in the population troughs, both predator and prey are more vulnerable to extinction. Rather than such additional resources helping the prey (a ...
... the environment with resources that increase the prey carrying capacity generate predator-prey cycles with more extreme amplitudes (Fig. 10). This means that in the population troughs, both predator and prey are more vulnerable to extinction. Rather than such additional resources helping the prey (a ...
Zebra mussel (Dreissena polymorpha)
... Sport fish (bass, walleyes, perch, trout) may be affected ...
... Sport fish (bass, walleyes, perch, trout) may be affected ...
Reintroduction: challenges and lessons for basic ecology
... be the breeding of the first wild-born generation in the release areaso. Clearly, elaborating success criteria for reintroduction, at least similar to Mace’s31 criteria for threatened species, is an urgent challenge for theoretical population biology. Results from already reintroduced populations ca ...
... be the breeding of the first wild-born generation in the release areaso. Clearly, elaborating success criteria for reintroduction, at least similar to Mace’s31 criteria for threatened species, is an urgent challenge for theoretical population biology. Results from already reintroduced populations ca ...
From Population to the Biosphere
... Migration is the movement of individual organisms into or out of a population. Migration affects population growth rate. There are two types of migration: a. Immigration is the movement of individuals into a population from other areas. This increases the population growth rate. b. Emigration is the ...
... Migration is the movement of individual organisms into or out of a population. Migration affects population growth rate. There are two types of migration: a. Immigration is the movement of individuals into a population from other areas. This increases the population growth rate. b. Emigration is the ...
3 - Edmodo
... Activity B – Carrying Capacity and Limiting Factors 1. Population Growth Depending on what resources are available to organisms in an ecosystem, populations can experience different types of growth. Below you will investigate 3 types of growth before moving on to the learning check box. EXPONENTIAL ...
... Activity B – Carrying Capacity and Limiting Factors 1. Population Growth Depending on what resources are available to organisms in an ecosystem, populations can experience different types of growth. Below you will investigate 3 types of growth before moving on to the learning check box. EXPONENTIAL ...
5.2 Limits to Growth
... 10. What happened to the number of wolves on Isle Royale between 1975 and 1985? 11. What happened to the moose population when the number of wolves was low? 12. What is the relationship between the moose and the wolves on Isle Royale? 13. Is the number of moose on the island a density-dependent or d ...
... 10. What happened to the number of wolves on Isle Royale between 1975 and 1985? 11. What happened to the moose population when the number of wolves was low? 12. What is the relationship between the moose and the wolves on Isle Royale? 13. Is the number of moose on the island a density-dependent or d ...
Lesson 2 – Evolution of population
... c. if ozone depletion led to increased ultraviolet radiation which caused many new mutations d. if genetic recombination, sexual reproduction, and mutation stopped and organisms could only reproduce sexually e. all of these 26. Most of the 700 species of fruit flies found in the Hawaiian archipelago ...
... c. if ozone depletion led to increased ultraviolet radiation which caused many new mutations d. if genetic recombination, sexual reproduction, and mutation stopped and organisms could only reproduce sexually e. all of these 26. Most of the 700 species of fruit flies found in the Hawaiian archipelago ...
Fredrik Olajos
... development gives a ring-like structure where the darker patches indicate slow growth. Therefore, the space in between each "ring" represent one year of growth (Picture 1). However, in older fish where growth rate is slowed down or halted, scale development is also greatly reduced, where as otolith ...
... development gives a ring-like structure where the darker patches indicate slow growth. Therefore, the space in between each "ring" represent one year of growth (Picture 1). However, in older fish where growth rate is slowed down or halted, scale development is also greatly reduced, where as otolith ...
Ecology of Populations Student study guide
... C) Define “food web” and explain how it is different than a food chain. D) Explain how much energy is transferred from trophic level to trophic level. E) Explain why ecosystems usually have just a few trophic levels. 5) From pages 380-384 titled “Understanding Populations” be able to; A) Define the ...
... C) Define “food web” and explain how it is different than a food chain. D) Explain how much energy is transferred from trophic level to trophic level. E) Explain why ecosystems usually have just a few trophic levels. 5) From pages 380-384 titled “Understanding Populations” be able to; A) Define the ...
The ecology of recovery
... traits are density-dependent. For example, populations recovering from previous exploitation will contain individuals of smaller size-at-age than when exploited, due to density-dependent body growth (Fabrizio et al. 2001; A. Gårdmark et al. unpubl.), common in, for example, exploited fish population ...
... traits are density-dependent. For example, populations recovering from previous exploitation will contain individuals of smaller size-at-age than when exploited, due to density-dependent body growth (Fabrizio et al. 2001; A. Gårdmark et al. unpubl.), common in, for example, exploited fish population ...
Chapter 5 notes
... • Population size governed by: – Births and deaths; immigration and emigration ...
... • Population size governed by: – Births and deaths; immigration and emigration ...
Comparison of species sensitivity distributions based on population
... However, chronic effects on survival, reproduction, or growth can induce very different consequences at population level among species [2]. This is generally ignored, and chronic SSDs are generally derived with data relative to a mixture of endpoints, for instance growth and reproduction, keeping th ...
... However, chronic effects on survival, reproduction, or growth can induce very different consequences at population level among species [2]. This is generally ignored, and chronic SSDs are generally derived with data relative to a mixture of endpoints, for instance growth and reproduction, keeping th ...