population ecology 2010
... • This leads to a trade-off of long life or high reproductive rate • Natural Selection has lead to two strategies for species: r strategists and K – strategists • Availability of suitable habitat for individuals of a population in a particular area is what determines its ultimate population size. ...
... • This leads to a trade-off of long life or high reproductive rate • Natural Selection has lead to two strategies for species: r strategists and K – strategists • Availability of suitable habitat for individuals of a population in a particular area is what determines its ultimate population size. ...
Ecology3e Ch19 Lecture KEY
... were made available by disturbances, and this allows coexistence. Species must have similar interaction strengths and growth rates and be able to respond quickly to disturbances that free up resources. ...
... were made available by disturbances, and this allows coexistence. Species must have similar interaction strengths and growth rates and be able to respond quickly to disturbances that free up resources. ...
Carrying capacity
... capacity could support a positive natural increase, or could require a negative natural increase. Thus, the carrying capacity is the number of individuals an environment can support without significant negative impacts to the given organism and its environment. Below carrying capacity, populations t ...
... capacity could support a positive natural increase, or could require a negative natural increase. Thus, the carrying capacity is the number of individuals an environment can support without significant negative impacts to the given organism and its environment. Below carrying capacity, populations t ...
Darwinian model of evolution
... makes competition exceptionally important in organizing ecological communities. We could refer to this property as the principle of competition. It states that competitors coexist if and only if they use common resources, or are exploited by the same consumers, equally efficiently (Balciunas, 2009). ...
... makes competition exceptionally important in organizing ecological communities. We could refer to this property as the principle of competition. It states that competitors coexist if and only if they use common resources, or are exploited by the same consumers, equally efficiently (Balciunas, 2009). ...
Factors Affecting Population Change
... Human activity (habitat loss, pesticides, etc) Pesticides meant to kill pest insects may have devastating effects on population of other species as well Pesticides are generally fat-soluble - once ingested they tend to remain in body fat of animals Each time predator eats contaminated prey item they ...
... Human activity (habitat loss, pesticides, etc) Pesticides meant to kill pest insects may have devastating effects on population of other species as well Pesticides are generally fat-soluble - once ingested they tend to remain in body fat of animals Each time predator eats contaminated prey item they ...
Invasive Plants
... One of the most difficult aspects of managing invasive species is that they are usually widespread before they are recognized as harmful. Some species, like small insects or fungi, are so inconspicuous that populations go unnoticed for many years after introduction. Others species are non-invasive a ...
... One of the most difficult aspects of managing invasive species is that they are usually widespread before they are recognized as harmful. Some species, like small insects or fungi, are so inconspicuous that populations go unnoticed for many years after introduction. Others species are non-invasive a ...
Summary/Reflection of Dan Freedman`s article, Science Education
... Population cycles are fluctuations in population size in response to varying effects of limiting factors. ...
... Population cycles are fluctuations in population size in response to varying effects of limiting factors. ...
Population Ecology - Jackson County Schools
... described by the following equation: Growth • r= reproductive rate (or growth rate) • N= population size at the beginning of the interval for which the births and deaths are ...
... described by the following equation: Growth • r= reproductive rate (or growth rate) • N= population size at the beginning of the interval for which the births and deaths are ...
185 - University of Connecticut
... compensation (a negative correlation in population density between competitors) and be most pronounced for species pairs that are morphologically similar, as they should compete most strongly for resources. We assessed the degree to which terrestrial snails in the LEF exhibit density compensation, f ...
... compensation (a negative correlation in population density between competitors) and be most pronounced for species pairs that are morphologically similar, as they should compete most strongly for resources. We assessed the degree to which terrestrial snails in the LEF exhibit density compensation, f ...
CH09 IM
... generation times and a low reproductive rate are prone to extinction. 5. Availability of a suitable habitat for individuals of a population ultimately determines the population size. C. Populations of different species vary in how long individual members typically live. 1. A survivorship curve is on ...
... generation times and a low reproductive rate are prone to extinction. 5. Availability of a suitable habitat for individuals of a population ultimately determines the population size. C. Populations of different species vary in how long individual members typically live. 1. A survivorship curve is on ...
Effects of water pulsing on individual performance and competitive
... Bilbrough & Caldwell 1997). These studies have demonstrated that the patterning of resource supply can be important for the performance of individual plants. However, for resource heterogeneity to also significantly influence community structure, species must respond differentially to this heterogen ...
... Bilbrough & Caldwell 1997). These studies have demonstrated that the patterning of resource supply can be important for the performance of individual plants. However, for resource heterogeneity to also significantly influence community structure, species must respond differentially to this heterogen ...
SPECIES INTERACTIONS
... 2. The decline in density of males was greater than found in the control areas. 3. The ratio of young to old males decreased more in experimental populations than controls. 4. The density of females was lower in experimental populations than in controls. • Conclusion: Changes in aggressiveness and t ...
... 2. The decline in density of males was greater than found in the control areas. 3. The ratio of young to old males decreased more in experimental populations than controls. 4. The density of females was lower in experimental populations than in controls. • Conclusion: Changes in aggressiveness and t ...
Long term response of six diatom species to eutrophication
... influenced by the trophic regime. In eutrophie waters the area under the curve is wider than in oligotrophic waters and the values of cr (Tab. 2) at station S 1 and S3 respectively are for Sk. costatum 1.63 vs 0.91, for Ch. didymum 1.24 vs 0.69 and for Ch. affine 1.18 vs 0.82 and they differ statist ...
... influenced by the trophic regime. In eutrophie waters the area under the curve is wider than in oligotrophic waters and the values of cr (Tab. 2) at station S 1 and S3 respectively are for Sk. costatum 1.63 vs 0.91, for Ch. didymum 1.24 vs 0.69 and for Ch. affine 1.18 vs 0.82 and they differ statist ...
LIMITING FACTORS QQ
... parasite lives in or on another organism (the host) and consequently harms it Parasites/Diseases can limit the growth of a population by killing their hosts Parasites/disease are more easily spread in highly dense populations ...
... parasite lives in or on another organism (the host) and consequently harms it Parasites/Diseases can limit the growth of a population by killing their hosts Parasites/disease are more easily spread in highly dense populations ...