Recent advances in ecological stoichiometry: insights for population
... To understand how stoichiometry can constrain population growth, it is necessary to examine the effects of stoichiometry on different demographic rates (survival, growth, development, reproduction and migration) at different life /history stages. An organism’s requirements of different elements may ...
... To understand how stoichiometry can constrain population growth, it is necessary to examine the effects of stoichiometry on different demographic rates (survival, growth, development, reproduction and migration) at different life /history stages. An organism’s requirements of different elements may ...
Species Richness and the Temporal Stability of Biomass Production
... abstract: The relationship between biological diversity and ecological stability has fascinated ecologists for decades. Determining the generality of this relationship, and discovering the mechanisms that underlie it, are vitally important for ecosystem management. Here, we investigate how species r ...
... abstract: The relationship between biological diversity and ecological stability has fascinated ecologists for decades. Determining the generality of this relationship, and discovering the mechanisms that underlie it, are vitally important for ecosystem management. Here, we investigate how species r ...
Seed arrival, ecological filters, and plant species richness: a meta
... communities may be reduced because of more intense competition for limiting resources (Elton 1958). Abiotic filters are hypothesized to impose strong constraints on local species membership. Classic examples include models of community diversity proposed by Grime (1979) and Huston (1999), in which t ...
... communities may be reduced because of more intense competition for limiting resources (Elton 1958). Abiotic filters are hypothesized to impose strong constraints on local species membership. Classic examples include models of community diversity proposed by Grime (1979) and Huston (1999), in which t ...
Chapter One Targets
... I can explain why burning fossil fuels is harmful to the environment. I can draw the general trend in carbon dioxide concentration over time. I can describe how chemicals pollute Earth’s air and water. I can describe the effect increased population growth will have on the environment. ...
... I can explain why burning fossil fuels is harmful to the environment. I can draw the general trend in carbon dioxide concentration over time. I can describe how chemicals pollute Earth’s air and water. I can describe the effect increased population growth will have on the environment. ...
1 - Biology Department | UNC Chapel Hill
... temporal variation and secondly because the reaction of the plants alters their own environmental ...
... temporal variation and secondly because the reaction of the plants alters their own environmental ...
Notes - Being an Environmental Scientist
... • Parasitism where host dies is devastating to both the parasite and the host populations. • Important host survives and thrives long enough for the parasite to reproduce and spread. ...
... • Parasitism where host dies is devastating to both the parasite and the host populations. • Important host survives and thrives long enough for the parasite to reproduce and spread. ...
10/4/06 version
... > soils and nutrient cycling were, with allelopathy, sufficient > to account for the observed differences in subcanopy herb ...
... > soils and nutrient cycling were, with allelopathy, sufficient > to account for the observed differences in subcanopy herb ...
Chapter 35
... AIM: How do scientists describe population growth? 2. Population limiting factors - environmental factors that restrict population growth 3. Logistic Growth Model (S - shaped curve) Q: How does the logistic model differ from the exponential model? A: It accounts for limiting factors in the environm ...
... AIM: How do scientists describe population growth? 2. Population limiting factors - environmental factors that restrict population growth 3. Logistic Growth Model (S - shaped curve) Q: How does the logistic model differ from the exponential model? A: It accounts for limiting factors in the environm ...
Effects of species diversity on the primary productivity of ecosystems
... to the broader scales at which natural communities are most likely to influence ecosystem functioning. Here we develop a simple patch-dynamics model to examine some of the scale-dependent and independent qualities of the diversity-productivity relationship. We first simulate a typical diversity-prod ...
... to the broader scales at which natural communities are most likely to influence ecosystem functioning. Here we develop a simple patch-dynamics model to examine some of the scale-dependent and independent qualities of the diversity-productivity relationship. We first simulate a typical diversity-prod ...
r - WordPress.com
... based on current fertility rates, and 2.5 (high), 2.1 (medium), or 1.7 (low) children per woman. • When fertility at the replacement rate is sustained for a generation—each woman producing exactly enough offspring to replace herself and her offspring’s father—zero population growth (ZPG) results. • ...
... based on current fertility rates, and 2.5 (high), 2.1 (medium), or 1.7 (low) children per woman. • When fertility at the replacement rate is sustained for a generation—each woman producing exactly enough offspring to replace herself and her offspring’s father—zero population growth (ZPG) results. • ...
16: 228-235
... possibility that the nurse also benefits has been rarely studied. We hypothesize that positive interactions are maintained not only because of the recruitment benefits for the facilitated plants but also because of fitness benefits for the nurse plant. We tested this hypothesis by comparing seed product ...
... possibility that the nurse also benefits has been rarely studied. We hypothesize that positive interactions are maintained not only because of the recruitment benefits for the facilitated plants but also because of fitness benefits for the nurse plant. We tested this hypothesis by comparing seed product ...
NotesChapter7
... present, extinction is certain if, in the long term, the combined death and emigration rates exceed the combined birth and immigration rates (Miller 2002). Extinction mechanisms act by raising the mortality rate, lowering the birth rate (Barbault and Sastrapradja 1995, Dobson 1996), lowering the mig ...
... present, extinction is certain if, in the long term, the combined death and emigration rates exceed the combined birth and immigration rates (Miller 2002). Extinction mechanisms act by raising the mortality rate, lowering the birth rate (Barbault and Sastrapradja 1995, Dobson 1996), lowering the mig ...
Regeneration of Sponges in Ecological Context: Is Regeneration an
... other traits that are determined primarily by evolutionary heritage? Does allocation of energy or materials impose trade-offs between regeneration versus competing processes such as growth or reproduction? Is regeneration time-course and style an integral part of coherent life history and morphologi ...
... other traits that are determined primarily by evolutionary heritage? Does allocation of energy or materials impose trade-offs between regeneration versus competing processes such as growth or reproduction? Is regeneration time-course and style an integral part of coherent life history and morphologi ...
NotesChapter7
... The picture shows Cape Gannet (Morus capensis) behaviour. Mechanisms of Chance Extinction in Single Populations Population extinction is certain if, in the long term, the mortality rate is higher than the birth rate (Barbault & Sastrapradja 1995) in the absence of migration. If migration is present, ...
... The picture shows Cape Gannet (Morus capensis) behaviour. Mechanisms of Chance Extinction in Single Populations Population extinction is certain if, in the long term, the mortality rate is higher than the birth rate (Barbault & Sastrapradja 1995) in the absence of migration. If migration is present, ...
A Game-Theoretic Model for Punctuated Equilibrium
... this model, it would be possible to take each lineage to be a separate species (corresponding to assuming every payoff function is unrelated to every other) and so each successful mutation would lead to a new species. Although this is an important extreme, we are more interested in modelling invasion ...
... this model, it would be possible to take each lineage to be a separate species (corresponding to assuming every payoff function is unrelated to every other) and so each successful mutation would lead to a new species. Although this is an important extreme, we are more interested in modelling invasion ...
Evaluating the “recovery level” of endangered species without prior
... mongoose individuals were captured by trapping (Ministry of the Environment Japan 2012). However, complete eradication has still not been achieved, and the population size in 2011 was estimated at 40–410 (Fukasawa et al. 2013). Here, we chose the following four endemic vertebrate species based on th ...
... mongoose individuals were captured by trapping (Ministry of the Environment Japan 2012). However, complete eradication has still not been achieved, and the population size in 2011 was estimated at 40–410 (Fukasawa et al. 2013). Here, we chose the following four endemic vertebrate species based on th ...
Environmental responses, not species interactions
... such theoretical predictions hold in natural communities where species differences are unlikely to be symmetrical is unkown because few studies have explicitly tested theory on the drivers of species synchrony in natural communities (Mutshinda et al. 2009, Thibaut et al. 2012), and they did not cons ...
... such theoretical predictions hold in natural communities where species differences are unlikely to be symmetrical is unkown because few studies have explicitly tested theory on the drivers of species synchrony in natural communities (Mutshinda et al. 2009, Thibaut et al. 2012), and they did not cons ...
Regeneration of Sponges in Ecological Context
... other traits that are determined primarily by evolutionary heritage? Does allocation of energy or materials impose trade-offs between regeneration versus competing processes such as growth or reproduction? Is regeneration time-course and style an integral part of coherent life history and morphologi ...
... other traits that are determined primarily by evolutionary heritage? Does allocation of energy or materials impose trade-offs between regeneration versus competing processes such as growth or reproduction? Is regeneration time-course and style an integral part of coherent life history and morphologi ...
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 ...
Effects of intra- and interspecific competition on
... scientific and the regulatory levels (De Laender and Janssen 2013). To date, there are only few studies that evaluated the combined effects of toxicants and ecological interactions on the sensitivity of aquatic organisms. Generally, an additive or synergic effect of competition on toxicant sensitivi ...
... scientific and the regulatory levels (De Laender and Janssen 2013). To date, there are only few studies that evaluated the combined effects of toxicants and ecological interactions on the sensitivity of aquatic organisms. Generally, an additive or synergic effect of competition on toxicant sensitivi ...
Effect of salinity on growth of juvenile Yarra pygmy perch
... drought) can lead to increasing selection pressure towards a particular genotype, which is able to withstand the current environmental condition. However since no individual genotype can be superior to all conditions, the remaining population is threatened when the environment either exceeds the spe ...
... drought) can lead to increasing selection pressure towards a particular genotype, which is able to withstand the current environmental condition. However since no individual genotype can be superior to all conditions, the remaining population is threatened when the environment either exceeds the spe ...
Moment Approximations of Individual-based Models
... particular, they have the advantage of not glossing over the effects fluctuations have on local and global states of ecological systems. They have the drawback that it may not be obvious from individual realizations what the generic behavior of the process is. To illustrate this problem, and to show ...
... particular, they have the advantage of not glossing over the effects fluctuations have on local and global states of ecological systems. They have the drawback that it may not be obvious from individual realizations what the generic behavior of the process is. To illustrate this problem, and to show ...
Environmental responses, not species interactions, determine
... on simple limiting cases in which only one of these three drivers operates. For example, in a community composed of large populations (no demographic stochasticity) with weak interspecific interations, community-wide species synchrony should be determined by the covariance of species’ responses to ...
... on simple limiting cases in which only one of these three drivers operates. For example, in a community composed of large populations (no demographic stochasticity) with weak interspecific interations, community-wide species synchrony should be determined by the covariance of species’ responses to ...