ppt
... outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - a departure from this point drives the dynamics back to this point. ...
... outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - a departure from this point drives the dynamics back to this point. ...
BROAD-WINGED HAWK NESTING AND FOOD HABITS
... biomass was calculated from total weights of all prey. We used actual weights of fresh prey or averages of weights from various published records or other studies at Rochester. ...
... biomass was calculated from total weights of all prey. We used actual weights of fresh prey or averages of weights from various published records or other studies at Rochester. ...
File - Mrs. Brown @ SCHS
... Exponential Logistic Human Population Historyorganisms in area growth exponential after Industrial Increase to Revolution “J” curve, Population growth carrying increase capacity immigration emigration Limiting factorsMove in Move out Resources that limit Age structure diagrams growth ...
... Exponential Logistic Human Population Historyorganisms in area growth exponential after Industrial Increase to Revolution “J” curve, Population growth carrying increase capacity immigration emigration Limiting factorsMove in Move out Resources that limit Age structure diagrams growth ...
On size and area: Patterns of mammalian body size extremes
... Ricklefs, 1987; Ricklefs and Schluter, 1993; Brown, 1995; Marquet et al., 1995). Much of this quest for a synthetic framework has been based on empirical statistical patterns relating body size with physiological, ecological and evolutionary traits (e.g. Lawton, 1990; Blackburn et al., 1993; Brown e ...
... Ricklefs, 1987; Ricklefs and Schluter, 1993; Brown, 1995; Marquet et al., 1995). Much of this quest for a synthetic framework has been based on empirical statistical patterns relating body size with physiological, ecological and evolutionary traits (e.g. Lawton, 1990; Blackburn et al., 1993; Brown e ...
Hard and Soft Selection Revisited: How Evolution by Natural
... If selection is indeed soft, then such variation can be sustained under purifying selection without our being dead one hundred times over. The invocation of soft selection as an explanation for observed patterns of genetic variation offers a solution to the dilemma of hard selection, but at the same ...
... If selection is indeed soft, then such variation can be sustained under purifying selection without our being dead one hundred times over. The invocation of soft selection as an explanation for observed patterns of genetic variation offers a solution to the dilemma of hard selection, but at the same ...
vs_newbirdintown_080911
... 1. Start with 3 different native species: blue bird, tree swallows, and purple martins. These natives birds are selective in their food and nesting sites and so do not compete with one another. This is modeled by having each native consumes a different color MnM. Make sure there are plenty of MnMs i ...
... 1. Start with 3 different native species: blue bird, tree swallows, and purple martins. These natives birds are selective in their food and nesting sites and so do not compete with one another. This is modeled by having each native consumes a different color MnM. Make sure there are plenty of MnMs i ...
Israa Dorgham
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
Israa Dorgham
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
SPECIES INFORMATION SHEET Branta bernicla hrota (wintering
... Site management plans based on careful ecological research should be a priority in the future, especially against the background of climate-change induced effects on feeding habitats (see Clausen et al. in press). The marking/re-sighting program should be continued, aimed at improving the understand ...
... Site management plans based on careful ecological research should be a priority in the future, especially against the background of climate-change induced effects on feeding habitats (see Clausen et al. in press). The marking/re-sighting program should be continued, aimed at improving the understand ...
Considering ecological dynamics in resource selection functions
... Key-words: case–control, competition, density-dependent habitat selection, functional response, logistic regression, predation, random effects, resource selection function, RSF ...
... Key-words: case–control, competition, density-dependent habitat selection, functional response, logistic regression, predation, random effects, resource selection function, RSF ...
Natural Selection
... due to chance. The number of individuals with each variation would remain about the same, since the frequency of each would be due to chance. (A figure would be nice…) A variation of a characteristic may increase or decrease in a population because the individuals carrying the gene for it may have d ...
... due to chance. The number of individuals with each variation would remain about the same, since the frequency of each would be due to chance. (A figure would be nice…) A variation of a characteristic may increase or decrease in a population because the individuals carrying the gene for it may have d ...
How realistic can we be?
... • Exploitation competition (for light) – Upright, branching corals can shade massive corals – Encrusting algae can spread over corals ...
... • Exploitation competition (for light) – Upright, branching corals can shade massive corals – Encrusting algae can spread over corals ...
Israa Dorgham
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
Considering ecological dynamics in resource selection functions
... Key-words: case–control, competition, density-dependent habitat selection, functional response, logistic regression, predation, random effects, resource selection function, RSF ...
... Key-words: case–control, competition, density-dependent habitat selection, functional response, logistic regression, predation, random effects, resource selection function, RSF ...
TRADITIONAL SUCCESSION AND CLIMAX CONCEPTS
... 5. Biogenic mechanisms of succession refer to a sudden change in the biota which has a major influence on succession (e.g., introduction of a plant disease which removes a major plant species, introduction of an herbivore which significantly affects plant populations). 6. A sere is a sequence of pl ...
... 5. Biogenic mechanisms of succession refer to a sudden change in the biota which has a major influence on succession (e.g., introduction of a plant disease which removes a major plant species, introduction of an herbivore which significantly affects plant populations). 6. A sere is a sequence of pl ...
Networking Agroecology: Integrating the Diversity of Agroecosystem
... the best practices for reversing declines in species richness in agricultural landscapes, let alone how networks of interacting species might be restored (but see Pocock et al., 2012). Simply reversing some of the processes of intensification, by reducing inputs, increasing landscape diversity and i ...
... the best practices for reversing declines in species richness in agricultural landscapes, let alone how networks of interacting species might be restored (but see Pocock et al., 2012). Simply reversing some of the processes of intensification, by reducing inputs, increasing landscape diversity and i ...
a haunting legacy from isoclines: mammal
... competition will vary among habitats, and habitat selection will be a major contributor to coexistence. Competition will vanish to zero (the ghost of competition) when species occupy completely separate habitats. even though the potential for competition remains high. Competitive potential can be es ...
... competition will vary among habitats, and habitat selection will be a major contributor to coexistence. Competition will vanish to zero (the ghost of competition) when species occupy completely separate habitats. even though the potential for competition remains high. Competitive potential can be es ...
Research Guidelines - IUCN Otter Specialist Group
... The Neotropical otter, Lontra longicaudis, has a large geographical range in Latin America, but we know little about its exact occurrence and its vulnerabilities. Projects are needed on Habitat selection Competition with other otter species, esp. with Giant otter The Southern river otter or huil ...
... The Neotropical otter, Lontra longicaudis, has a large geographical range in Latin America, but we know little about its exact occurrence and its vulnerabilities. Projects are needed on Habitat selection Competition with other otter species, esp. with Giant otter The Southern river otter or huil ...
Biodiversity and Climate Change: Integrating Evolutionary and
... Throw up a handful of feathers, and all must fall to the ground according to definite laws; but how simple is this ...
... Throw up a handful of feathers, and all must fall to the ground according to definite laws; but how simple is this ...
Chapter 16 - Jamestown Public Schools
... (3) There are more consumers than producers. (4) There are interactions between biotic and abiotic factors. ...
... (3) There are more consumers than producers. (4) There are interactions between biotic and abiotic factors. ...
Evaluating the functional importance of secretive species: A case
... by the number of days elapsed between captures. Because captures of Seminatrix were very low in March, we assessed growth in this species during only three periods (late spring, summer and fall–early spring). Due to parturition and mass loss over winter, some groups occasionally exhibited negative s ...
... by the number of days elapsed between captures. Because captures of Seminatrix were very low in March, we assessed growth in this species during only three periods (late spring, summer and fall–early spring). Due to parturition and mass loss over winter, some groups occasionally exhibited negative s ...
Ecological Restoration in the Face of Global Climate Change
... resilience and adaptability into local and regional ecosystems, there is still the question of how species may shift as global warming becomes more advanced. One particular area of concern is what effects climate change will have on invading species. In North Carolina, for example, plant species tha ...
... resilience and adaptability into local and regional ecosystems, there is still the question of how species may shift as global warming becomes more advanced. One particular area of concern is what effects climate change will have on invading species. In North Carolina, for example, plant species tha ...
352
... That is good! Unhealthy ecosystems do not have a good biodiversity. An example of an ecosystem with good biodiversity would be a forest that has been untouched for hundreds of years. There are a lot of different organisms there and there are lots of them. A forest that just had a fire would not have ...
... That is good! Unhealthy ecosystems do not have a good biodiversity. An example of an ecosystem with good biodiversity would be a forest that has been untouched for hundreds of years. There are a lot of different organisms there and there are lots of them. A forest that just had a fire would not have ...
The poverty of the protists
... species: only diatoms, foraminiferans, ‘radiolarians’, ciliates and dinoflagellates have diversified into a few thousand species, about the same as much narrower groups such as grasses, orchids or sponges. There are only about 3000 species of ciliates, for example, and as they are well-studied and m ...
... species: only diatoms, foraminiferans, ‘radiolarians’, ciliates and dinoflagellates have diversified into a few thousand species, about the same as much narrower groups such as grasses, orchids or sponges. There are only about 3000 species of ciliates, for example, and as they are well-studied and m ...
Theoretical ecology
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change.Theoretical ecology has further benefited from the advent of fast computing power, allowing the analysis and visualization of large-scale computational simulations of ecological phenomena. Importantly, these modern tools provide quantitative predictions about the effects of human induced environmental change on a diverse variety of ecological phenomena, such as: species invasions, climate change, the effect of fishing and hunting on food network stability, and the global carbon cycle.