View or download: Introduction, methods, results
... achievable would be λ= 1.000). For example, this approach would demand that even if 100% of Newell’s shearwater predation could be alleviated on Kauai, should there be any mortality from fallout and powerline collision, the population would still decline (albeit slower). To identi ...
... achievable would be λ= 1.000). For example, this approach would demand that even if 100% of Newell’s shearwater predation could be alleviated on Kauai, should there be any mortality from fallout and powerline collision, the population would still decline (albeit slower). To identi ...
Canada Of lemmings and snowshoe hares: the
... What causes lemming population fluctuations? Since there is geographical synchrony, immigration and emigration cannot be a regional explanation, although they may be involved in local areas. Both reproductive rates and mortality rates change to produce the observed density fluctuations, and the key ...
... What causes lemming population fluctuations? Since there is geographical synchrony, immigration and emigration cannot be a regional explanation, although they may be involved in local areas. Both reproductive rates and mortality rates change to produce the observed density fluctuations, and the key ...
Population Ecology
... researchers transferred chicks among nests to produce reduced broods (three or four chicks), normal broods (five or six), and enlarged broods (seven or eight). They then measured the percentage of male and female parent birds that survived the following winter. (Both males and females provide care f ...
... researchers transferred chicks among nests to produce reduced broods (three or four chicks), normal broods (five or six), and enlarged broods (seven or eight). They then measured the percentage of male and female parent birds that survived the following winter. (Both males and females provide care f ...
Environmental variability and population dynamics: do European
... studies that distinguish the effect of environmental variability from the effects of popusame duck species or close ecological counterparts live in highly variable (north American prairies) and in stable (north European lakes) environments, to distinguish the relative contributions of environmental ...
... studies that distinguish the effect of environmental variability from the effects of popusame duck species or close ecological counterparts live in highly variable (north American prairies) and in stable (north European lakes) environments, to distinguish the relative contributions of environmental ...
Intraspecific trait variation and colonization sequence alter
... arrival treatments, where the identity of the early and late arriver differed, and 3) ‘simultaneous’ arrival treatments, where individuals from both source populations were added together during each colonization event (Table 1). In general, strong effects of early arriver identity (e.g. on populati ...
... arrival treatments, where the identity of the early and late arriver differed, and 3) ‘simultaneous’ arrival treatments, where individuals from both source populations were added together during each colonization event (Table 1). In general, strong effects of early arriver identity (e.g. on populati ...
spatial selection and inheritance: applying evolutionary concepts to
... INTRODUCTION An organism’s ability to survive and reproduce is profoundly tied to the suitability of its local environment, defined as its expected fitness in situ. Factors that determine environmental suitability (e.g., resource availability or risk of attack) typically show positive autocorrelation ...
... INTRODUCTION An organism’s ability to survive and reproduce is profoundly tied to the suitability of its local environment, defined as its expected fitness in situ. Factors that determine environmental suitability (e.g., resource availability or risk of attack) typically show positive autocorrelation ...
Impacts of environmental variability in open populations and
... this effect in several special cases (square-wave temporal variation and Gaussian stochastic variation). The inflationary effect can be large in ‘‘intermittent’’ sinks (where there are periods with positive growth), and when temporal variation is strongly autocorrelated. The effect appears to be robu ...
... this effect in several special cases (square-wave temporal variation and Gaussian stochastic variation). The inflationary effect can be large in ‘‘intermittent’’ sinks (where there are periods with positive growth), and when temporal variation is strongly autocorrelated. The effect appears to be robu ...
Zooplankton population dynamics: measuring in situ growth and
... tra could have been calculated from the OPC measuremeter is nearly similar to the mean estimate of flow obments. Due to the lack of historic data and funds for tained by the GPS and depth fixes. additional measurements, we had to choose the bioWe also regrouped the OPC original 3431 digital volume s ...
... tra could have been calculated from the OPC measuremeter is nearly similar to the mean estimate of flow obments. Due to the lack of historic data and funds for tained by the GPS and depth fixes. additional measurements, we had to choose the bioWe also regrouped the OPC original 3431 digital volume s ...
Sexual Mores, Ethical Theories, and the Overpopulation Myth
... laws of the land? The second development was Pope Paul VI’s 1968 encyclical letter on birth control, Humanae vitae, which invoked natural law as well as religious incentives against the use of artificial contraceptive devices to avoid pregnancy. The Pope’s position was criticized by many ethicists a ...
... laws of the land? The second development was Pope Paul VI’s 1968 encyclical letter on birth control, Humanae vitae, which invoked natural law as well as religious incentives against the use of artificial contraceptive devices to avoid pregnancy. The Pope’s position was criticized by many ethicists a ...
Chapter 5
... Cyclic: populations fluctuate and regular cyclic or boom-and-bust cycles. Ex: Lynx & snowshoe hare Irregular: erratic changes possibly due to chaos or ...
... Cyclic: populations fluctuate and regular cyclic or boom-and-bust cycles. Ex: Lynx & snowshoe hare Irregular: erratic changes possibly due to chaos or ...
Recent advances in ecological stoichiometry: insights for population
... et al. 2002, McVean et al. 2002), but the elemental aspect of food quality has received less attention (Sterner and Elser 2002). We argue that explicit consideration of stoichiometric constraints in models and empirical studies can enhance our ability to explain how populations and communities opera ...
... et al. 2002, McVean et al. 2002), but the elemental aspect of food quality has received less attention (Sterner and Elser 2002). We argue that explicit consideration of stoichiometric constraints in models and empirical studies can enhance our ability to explain how populations and communities opera ...
Recent advances in ecological stoichiometry: insights for population
... et al. 2002, McVean et al. 2002), but the elemental aspect of food quality has received less attention (Sterner and Elser 2002). We argue that explicit consideration of stoichiometric constraints in models and empirical studies can enhance our ability to explain how populations and communities opera ...
... et al. 2002, McVean et al. 2002), but the elemental aspect of food quality has received less attention (Sterner and Elser 2002). We argue that explicit consideration of stoichiometric constraints in models and empirical studies can enhance our ability to explain how populations and communities opera ...
Interactions of Life Practice Test 2011 Answer Section
... ____ 25. Which of the following is not part of an organism’s niche? a. how it digests food c. how it finds a mate b. how it avoids danger d. how it obtains shelter ____ 26. Which of the following conditions tends to increase the size of a population? a. births exceed deaths c. movements out of an ar ...
... ____ 25. Which of the following is not part of an organism’s niche? a. how it digests food c. how it finds a mate b. how it avoids danger d. how it obtains shelter ____ 26. Which of the following conditions tends to increase the size of a population? a. births exceed deaths c. movements out of an ar ...
The niche construction paradigm in ecological time
... important in a more general formulation of the niche construction idea is its application at an interspecific level. Indeed, conceptual frameworks such as the response/effect competition framework of Goldberg (1990) are by nature interspecific and conceptually fall within the same sort of framework. T ...
... important in a more general formulation of the niche construction idea is its application at an interspecific level. Indeed, conceptual frameworks such as the response/effect competition framework of Goldberg (1990) are by nature interspecific and conceptually fall within the same sort of framework. T ...
Population and Evolutionary Dynamics based on Predator
... (Kokko and Lopez-Sepulcre, 2007). The feedback is not entirely straightforward and there are several challenging questions. Among them, the most fundamental one is about the importance of the feedback. It is claimed that only an extensive research effort involving multiple experimental approaches wi ...
... (Kokko and Lopez-Sepulcre, 2007). The feedback is not entirely straightforward and there are several challenging questions. Among them, the most fundamental one is about the importance of the feedback. It is claimed that only an extensive research effort involving multiple experimental approaches wi ...
MATHEMATICAL MODELS IN POPULATION DYNAMICS BY
... 1.2 Formulating the Model ........................................................................................................................... 5 1.3 Methods for Analysis of Population Dynamics .............................................................................. 8 ...
... 1.2 Formulating the Model ........................................................................................................................... 5 1.3 Methods for Analysis of Population Dynamics .............................................................................. 8 ...
The population growth and control of African elephants in Kruger
... Elephants are hard to count. Despite the apparent implausibility of such a statement, it is true (at least in the wild). Although elephants are the world’s largest land animals, their size necessitates that they (as a species) are spread out over proportionately large distances, making accurate coun ...
... Elephants are hard to count. Despite the apparent implausibility of such a statement, it is true (at least in the wild). Although elephants are the world’s largest land animals, their size necessitates that they (as a species) are spread out over proportionately large distances, making accurate coun ...
A severe predator-induced population decline predicted
... In this study, we build on Stojanovic et al. (2014b) and Webb et al. (2014) by presenting PVAs incorporating up-to-date information concerning the highly variable and site-specific reproductive success and mortality of swift parrots. We specifically examine: (1) the impact of sugar glider predation on ...
... In this study, we build on Stojanovic et al. (2014b) and Webb et al. (2014) by presenting PVAs incorporating up-to-date information concerning the highly variable and site-specific reproductive success and mortality of swift parrots. We specifically examine: (1) the impact of sugar glider predation on ...
(1999) Consequences of the Allee effect for behaviour, ecology and
... between a component of individual fitness and either numbers or densities of conspecifics, can be termed a mechanism of the Allee effect. However, only those mechanisms that affect some measurable component of individual fitness should be included within the definition of Allee effects. It is thus s ...
... between a component of individual fitness and either numbers or densities of conspecifics, can be termed a mechanism of the Allee effect. However, only those mechanisms that affect some measurable component of individual fitness should be included within the definition of Allee effects. It is thus s ...
Periodic Abstinence: Definition, Motivation and Research
... of abstinence with refraining from foods, as the most appropriate distinguishing characteristic of natural family planning. 8 With the provision that a couple not abstain from "expression of affection" while abstaining from "coital sexual intercourse," it would seem that we now have an adequate defi ...
... of abstinence with refraining from foods, as the most appropriate distinguishing characteristic of natural family planning. 8 With the provision that a couple not abstain from "expression of affection" while abstaining from "coital sexual intercourse," it would seem that we now have an adequate defi ...
INTRODUCTION
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer on a separate sheet, and/or discuss with your classmates and teacher. ...
... Extend your thinking: In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer on a separate sheet, and/or discuss with your classmates and teacher. ...
Biojeopardy: Ecology
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...