Experiments with the wild at the Oostvaardersplassen
... controlled environment and worlds they purport to model; theoretically rendering laboratory research inconsequential to the world out there. They also police who can contribute to and contest the production of natural knowledge. But the standardisation of laboratory spaces allows scientists at diver ...
... controlled environment and worlds they purport to model; theoretically rendering laboratory research inconsequential to the world out there. They also police who can contribute to and contest the production of natural knowledge. But the standardisation of laboratory spaces allows scientists at diver ...
EVPP 550 Waterscape Ecology and Management – Lecture 10
... • Here is a second one with two synchronized populations and a resting stage • This is most common in copepods which require sexual reproduction • In the cladocerans and rotifers, there is less synchrony generally partially due to continuous asexual reproduction under favorable conditions • It’s als ...
... • Here is a second one with two synchronized populations and a resting stage • This is most common in copepods which require sexual reproduction • In the cladocerans and rotifers, there is less synchrony generally partially due to continuous asexual reproduction under favorable conditions • It’s als ...
The significance of inter- and intraspecific variation in bacterivorous
... lakes and marine systems. Large species-specific differences in their feeding behaviour and growth rates have been documented for closely related species. Intraspecific variation, which is, most likely, caused by varying clonal composition may be as important as interspecific variation. Finally, the ...
... lakes and marine systems. Large species-specific differences in their feeding behaviour and growth rates have been documented for closely related species. Intraspecific variation, which is, most likely, caused by varying clonal composition may be as important as interspecific variation. Finally, the ...
Diel vertical migration and feeding of chaetognaths in
... with 99 of them containing food (mean FCR = 0.296), 261 were S. minima (29 of them containing food, mean FCR = 0.111) and 167 were S. serratodentata (19 of them containing food, mean FCR = 0.114). The diet of the three chaetognath species at all sampling times is presented in Table 1. Although copep ...
... with 99 of them containing food (mean FCR = 0.296), 261 were S. minima (29 of them containing food, mean FCR = 0.111) and 167 were S. serratodentata (19 of them containing food, mean FCR = 0.114). The diet of the three chaetognath species at all sampling times is presented in Table 1. Although copep ...
Relative levels of food aggression displayed by Common
... Some studies (e.g. Rotenberry 1980) have shown that species that display aggressive competition are not necessarily the most successful ones. Rather, species that use resources opportunistically and discreetly may have greater success. An invasive species that is lacking experience of its competitor ...
... Some studies (e.g. Rotenberry 1980) have shown that species that display aggressive competition are not necessarily the most successful ones. Rather, species that use resources opportunistically and discreetly may have greater success. An invasive species that is lacking experience of its competitor ...
Final Report - The Rufford Foundation
... make the egg unpalatable and easily identified as treated). That is, because it is needed a high volume of it to attain aversive doses for wild predators. The alternative of microencapsulation should be an important step in our research. ...
... make the egg unpalatable and easily identified as treated). That is, because it is needed a high volume of it to attain aversive doses for wild predators. The alternative of microencapsulation should be an important step in our research. ...
Parameter synthesis for probabilistic real-time systems
... − successfully used by non-experts for many application domains, but full automation and good tool support essential ...
... − successfully used by non-experts for many application domains, but full automation and good tool support essential ...
Ciliate (Euplotes sp.) predation by Pseudodiaptomus annandalei
... Results: Males and females of P. annandalei consumed 8 ~ 15 ciliate cells/h. The probability of ciliate ingestion following an attack was a direct function of the copepod's hunger level. Conversely, the probability of prey rejection after capture was a negative function of the copepod's hunger level ...
... Results: Males and females of P. annandalei consumed 8 ~ 15 ciliate cells/h. The probability of ciliate ingestion following an attack was a direct function of the copepod's hunger level. Conversely, the probability of prey rejection after capture was a negative function of the copepod's hunger level ...
Restoring Dipterocarp Rainforest Diversity
... insufficient for foresters to make good decisions for sustainable management. The PhD research was mainly conducted in the Sow-a-Seed project (Sabah) that started in 1998 to restore rainforest biodiversity degraded from logging and wildfire. Within the project area a common garden experiment was est ...
... insufficient for foresters to make good decisions for sustainable management. The PhD research was mainly conducted in the Sow-a-Seed project (Sabah) that started in 1998 to restore rainforest biodiversity degraded from logging and wildfire. Within the project area a common garden experiment was est ...
1 FORAGING NICHES AND RESOURCE PARTITIONING
... The coexistence of many seemingly similar songbird species has led to a number of classical studies on competition and resource partitioning in birds (Holmes et al. 1979, MacArthur 1958, Noon 1981). Resource partitioning is thought to be especially important when resources are limiting (Dhondt 2012, ...
... The coexistence of many seemingly similar songbird species has led to a number of classical studies on competition and resource partitioning in birds (Holmes et al. 1979, MacArthur 1958, Noon 1981). Resource partitioning is thought to be especially important when resources are limiting (Dhondt 2012, ...
are antarctic minke whales unusually abundant?
... by minke whales, artificially boosting minke whale populations. This new study indicates that minke whale populations are not significantly different from their average population size before the loss of large baleen whales. These results suggest that competition for krill is not a major factor dete ...
... by minke whales, artificially boosting minke whale populations. This new study indicates that minke whale populations are not significantly different from their average population size before the loss of large baleen whales. These results suggest that competition for krill is not a major factor dete ...
Ansorge, H., Kluth, G., and Hahne, S. (2006). Feeding ecology of
... Gade-Jrrgensen and Stagegaard 2000) was employed with our data. This calculation for prey biomass per collectable scat (Weaver 1993) is based on a linear regression model and also takes the different prey sizes into account. Furthermore, a third model for calculating prey biomass was used in order t ...
... Gade-Jrrgensen and Stagegaard 2000) was employed with our data. This calculation for prey biomass per collectable scat (Weaver 1993) is based on a linear regression model and also takes the different prey sizes into account. Furthermore, a third model for calculating prey biomass was used in order t ...
A meso-predator release of stickleback promotes recruitment of
... Coastal eutrophication management programmes usually aim to combat eutrophication symptoms by controlling the nutrient input only, whereas the role of biological communities for regulating ecosystem functioning has only been incorporated in lake management (Søndergaard et al., 2007). In order to eva ...
... Coastal eutrophication management programmes usually aim to combat eutrophication symptoms by controlling the nutrient input only, whereas the role of biological communities for regulating ecosystem functioning has only been incorporated in lake management (Søndergaard et al., 2007). In order to eva ...
Rutgers Model United Nations 4 - Institute for Domestic and
... focuses on implementing multilateral agreements and Memoranda of Understanding regarding conservation of certain species.11 States can use the CMS as a tool to base other treaties or tools that are more regional or state specific. ...
... focuses on implementing multilateral agreements and Memoranda of Understanding regarding conservation of certain species.11 States can use the CMS as a tool to base other treaties or tools that are more regional or state specific. ...
1 - Black Rock Forest Consortium
... Predators and parasitoids alter food web interactions which affects trophic structure (Weisser and Siemann 2004). (4) Microbial feeders direct change of carbon storage and alter food web interactions through changing in decomposition rates and grazing on fungal hyphae (Weisser and Siemann 2004). Fin ...
... Predators and parasitoids alter food web interactions which affects trophic structure (Weisser and Siemann 2004). (4) Microbial feeders direct change of carbon storage and alter food web interactions through changing in decomposition rates and grazing on fungal hyphae (Weisser and Siemann 2004). Fin ...
Divergent composition but similar function of soil food webs of
... Food web modeling Feeding rates were calculated for each functional group by assuming that the annual average production of the group balances the rate of loss through natural death and predation (Hunt et al. 1987) and were based on the relative abundance of the prey groups and on the preferences of ...
... Food web modeling Feeding rates were calculated for each functional group by assuming that the annual average production of the group balances the rate of loss through natural death and predation (Hunt et al. 1987) and were based on the relative abundance of the prey groups and on the preferences of ...
Diversity and Distributions
... species with non-overlapping niches in time or space are more likely to co-exist (Chase & Leibold, 2003), and if species niches have been conserved during evolutionary history, then successful invaders should exhibit a particular phylogenetic position relative to native communities. A number of rece ...
... species with non-overlapping niches in time or space are more likely to co-exist (Chase & Leibold, 2003), and if species niches have been conserved during evolutionary history, then successful invaders should exhibit a particular phylogenetic position relative to native communities. A number of rece ...
2. Biotic and Abiotic factors
... Abiotic factors are non-living physical and chemical factors which affect the ability of organisms to survive and reproduce. Some abiotic factors include light intensity, temperature, pH level, availability of water, oxygen/carbon dioxide levels and levels of pollution. Abiotic factors vary in the e ...
... Abiotic factors are non-living physical and chemical factors which affect the ability of organisms to survive and reproduce. Some abiotic factors include light intensity, temperature, pH level, availability of water, oxygen/carbon dioxide levels and levels of pollution. Abiotic factors vary in the e ...
Fishes learn aversions to a nudibranch`s chemical defense
... 1998 for procedures), and dyeing this with food coloring to increase visibility. This mixture was injected through a syringe into a 0.25 M CaCl2 solution, creating a ‘noodle’ with the consistency of cooked pasta which was cut into similar-sized pellets. Consumer behaviors were scored as accepted (co ...
... 1998 for procedures), and dyeing this with food coloring to increase visibility. This mixture was injected through a syringe into a 0.25 M CaCl2 solution, creating a ‘noodle’ with the consistency of cooked pasta which was cut into similar-sized pellets. Consumer behaviors were scored as accepted (co ...
PDF - Wiley Online Library
... (< 1.8 mm) individuals. Times until first movement of those individuals which did move during the 45 min were quite variable; mean values were found to be generally similar for all size classes. Movement by individuals during the experiment was initiated in part by physical contact with other indivi ...
... (< 1.8 mm) individuals. Times until first movement of those individuals which did move during the 45 min were quite variable; mean values were found to be generally similar for all size classes. Movement by individuals during the experiment was initiated in part by physical contact with other indivi ...
American Journal of Botany
... H2: Herbivore impacts on producer biomass decline as producer richness increases. Q3. Does primary producer diversity influence the decomposition of litter? H3: Producer diversity accelerates decomposition, leading to lower stocks of detritus. Q4. What mechanisms generate effects of producer diversi ...
... H2: Herbivore impacts on producer biomass decline as producer richness increases. Q3. Does primary producer diversity influence the decomposition of litter? H3: Producer diversity accelerates decomposition, leading to lower stocks of detritus. Q4. What mechanisms generate effects of producer diversi ...
American Journal of Botany
... H2: Herbivore impacts on producer biomass decline as producer richness increases. Q3. Does primary producer diversity influence the decomposition of litter? H3: Producer diversity accelerates decomposition, leading to lower stocks of detritus. Q4. What mechanisms generate effects of producer diversi ...
... H2: Herbivore impacts on producer biomass decline as producer richness increases. Q3. Does primary producer diversity influence the decomposition of litter? H3: Producer diversity accelerates decomposition, leading to lower stocks of detritus. Q4. What mechanisms generate effects of producer diversi ...
Iguanas of the South Pacific
... Undoubtedly, mongooses have had a drastic been introduced there about seven years preeffect on ground nesting birds, and some reptiles, viously and in relatively small numbers. particularly diurnal forms which are only partially arboreal. Birds such as the banded rail Rallus In conclusion, it can b ...
... Undoubtedly, mongooses have had a drastic been introduced there about seven years preeffect on ground nesting birds, and some reptiles, viously and in relatively small numbers. particularly diurnal forms which are only partially arboreal. Birds such as the banded rail Rallus In conclusion, it can b ...
Ecological niches occupied by in South African rangeland communities Dichapetalum cymosum
... eradication by conventional control methods are labour intensive, expensive and often impractical. In South Africa, the communal or emerging farming sectors are the most affected. This is mainly due to the high costs associated with control measures such as fencing, supplementary feeding and veterin ...
... eradication by conventional control methods are labour intensive, expensive and often impractical. In South Africa, the communal or emerging farming sectors are the most affected. This is mainly due to the high costs associated with control measures such as fencing, supplementary feeding and veterin ...
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.