Top predators in the Barents Sea, dependent on capelin?
... Does the annual, averaged energy consumption by the cod stock increase with increasing capelin abundance in the system? ...
... Does the annual, averaged energy consumption by the cod stock increase with increasing capelin abundance in the system? ...
Density dependence and population regulation in marine fish: a
... Abstract. Do small-scale experiments showing spatial density dependence in marine fishes scale-up to temporal density dependence and regulation of relatively large local populations? If so, what are the causative mechanisms and their implications? We conducted an eight-year multigeneration study of p ...
... Abstract. Do small-scale experiments showing spatial density dependence in marine fishes scale-up to temporal density dependence and regulation of relatively large local populations? If so, what are the causative mechanisms and their implications? We conducted an eight-year multigeneration study of p ...
a chameleon as predator of butterflies and its avoidance of known
... as Pierids were taken immediately, while more ambiguously coloured prey items needed longer consideration, and were more often refused within the ten second period. The chameleon was also able to generalize the Acraea pattern, avoiding on sight all the species of that genus, even those not seen befo ...
... as Pierids were taken immediately, while more ambiguously coloured prey items needed longer consideration, and were more often refused within the ten second period. The chameleon was also able to generalize the Acraea pattern, avoiding on sight all the species of that genus, even those not seen befo ...
EXPLAINING THE INVASIVE SUCCESS OF THE EASTERN MOSQUITOFISH (GAMBUSIA HOLBROOKI):
... them (i.e. lower latitudes and lower reaches) presented higher reproductive effort and lower body condition, but these patterns explained low percent variation, were nonlinear, and depended on fish age. In addition, the intraspecific version of Bergmann’s rule or its converse did not apply to the mo ...
... them (i.e. lower latitudes and lower reaches) presented higher reproductive effort and lower body condition, but these patterns explained low percent variation, were nonlinear, and depended on fish age. In addition, the intraspecific version of Bergmann’s rule or its converse did not apply to the mo ...
Patterns in body mass distributions: sifting among alternative
... mass distribution of South American mammals or if the observed body mass distribution of South American mammals is a consequence of the invasion, it is clear that body mass distributions are made of different faunal stocks with different macro-evolutionary histories. For fossil North American mammal ...
... mass distribution of South American mammals or if the observed body mass distribution of South American mammals is a consequence of the invasion, it is clear that body mass distributions are made of different faunal stocks with different macro-evolutionary histories. For fossil North American mammal ...
Freshwater autotrophic picoplankton: a review
... Autotrophic picoplankton (APP) are distributed worldwide and are ubiquitous in all types of lakes of varying trophic state. APP are major players in carbon production in all aquatic ecosystems, including extreme environments such as cold ice-covered and/or warm tropical lakes and thermal springs. Th ...
... Autotrophic picoplankton (APP) are distributed worldwide and are ubiquitous in all types of lakes of varying trophic state. APP are major players in carbon production in all aquatic ecosystems, including extreme environments such as cold ice-covered and/or warm tropical lakes and thermal springs. Th ...
the ecological consequences of variation in plants
... question concerning the ecological consequences of omnivory is how omnivores respond to variation in resources at more than one trophic level. For example, omnivores that feed on plants and prey encounter variation in the quality of both as food (Kiman and Yeargan 1985, Bjorndal 1991, Milne and Walt ...
... question concerning the ecological consequences of omnivory is how omnivores respond to variation in resources at more than one trophic level. For example, omnivores that feed on plants and prey encounter variation in the quality of both as food (Kiman and Yeargan 1985, Bjorndal 1991, Milne and Walt ...
Experimental demonstration of a trophic cascade in the Gal#_#
... predators have important indirect effects on species lower in the food web by means of their density (Density Mediated Indirect Interactions DMII), behavior (Behaviorally Mediated Indirect Interactions, BMII), and diversity [4–8]. The complexity of tropical and sub-tropical food webs, which includes ...
... predators have important indirect effects on species lower in the food web by means of their density (Density Mediated Indirect Interactions DMII), behavior (Behaviorally Mediated Indirect Interactions, BMII), and diversity [4–8]. The complexity of tropical and sub-tropical food webs, which includes ...
Link - University of Minnesota Duluth
... their hosts. Some of the most devastating species are spreading in ‘‘defense free space’’, causing extensive mortality of hosts that are inherently susceptible, perhaps due to their lack of coevolutionary history with the invader. These disturbances have altered the dynamics of canopy gaps, coarse w ...
... their hosts. Some of the most devastating species are spreading in ‘‘defense free space’’, causing extensive mortality of hosts that are inherently susceptible, perhaps due to their lack of coevolutionary history with the invader. These disturbances have altered the dynamics of canopy gaps, coarse w ...
Plains bison restoration in the Canadian Rocky Mountains
... Parks Canada hosted a Rocky Mountain bison restoration research forum in October 1999 (Shury 2000). Attendees included ecologists, archaeologists, and land managers. Main issues discussed included containment of bison, range carrying capacity, adaptive management approaches, involvement of First Nat ...
... Parks Canada hosted a Rocky Mountain bison restoration research forum in October 1999 (Shury 2000). Attendees included ecologists, archaeologists, and land managers. Main issues discussed included containment of bison, range carrying capacity, adaptive management approaches, involvement of First Nat ...
The size of beaks of Darwin`s finches on the Galápagos Islands is
... rarely leave the island, and immigrants rarely arrive. As a result, the Grants can be confident that migrations have a negligible effect at best on the changes in the allele frequencies of the island population. The Grants survey every bird on Daphne Major, measuring vital statistics such as their bod ...
... rarely leave the island, and immigrants rarely arrive. As a result, the Grants can be confident that migrations have a negligible effect at best on the changes in the allele frequencies of the island population. The Grants survey every bird on Daphne Major, measuring vital statistics such as their bod ...
Developing mathematical modelling skills: The role of CAS
... population of the USA from 1790 and 1960 and asked to determine the present population by (i) fitting the data to a Malthus model by the method of least squares and (ii) fitting any three of the data points to a logistic model. This is an example of a closed problem for which the model is given as a ...
... population of the USA from 1790 and 1960 and asked to determine the present population by (i) fitting the data to a Malthus model by the method of least squares and (ii) fitting any three of the data points to a logistic model. This is an example of a closed problem for which the model is given as a ...
Conceptual ecosystem models are provided for the National Park
... precipitation and groundwater flow as inputs to lakes. This, in turn, has implications for water chemistry and associated biological processes. Wind-mediated disturbances Many disturbance agents are influenced by terrain as it interacts with wind. For example, wind throw is more common in mountain p ...
... precipitation and groundwater flow as inputs to lakes. This, in turn, has implications for water chemistry and associated biological processes. Wind-mediated disturbances Many disturbance agents are influenced by terrain as it interacts with wind. For example, wind throw is more common in mountain p ...
Testing the island effect in adaptive radiation: rates
... groups (figure 1). The basal split in the phylogeny separates a group of predominantly mainland anoles (henceforth referred to as M1) from the rest of the clade (monophyly of this mainland clade is suggested, but not corroborated; an alternative possibility is that the Greater Antillean clade arose ...
... groups (figure 1). The basal split in the phylogeny separates a group of predominantly mainland anoles (henceforth referred to as M1) from the rest of the clade (monophyly of this mainland clade is suggested, but not corroborated; an alternative possibility is that the Greater Antillean clade arose ...
Review of nekton patterns and ecological processes
... The majority of taxa (85%, or 126 out of 149) showed no effect with distance from the edge of a patch (Table 1). Patterns varied among taxa that showed a significant relationship with distance from edge; 4 fish taxa were more abundant away from the edge but none were more abundant near the edge; for ...
... The majority of taxa (85%, or 126 out of 149) showed no effect with distance from the edge of a patch (Table 1). Patterns varied among taxa that showed a significant relationship with distance from edge; 4 fish taxa were more abundant away from the edge but none were more abundant near the edge; for ...
Appendix F: Invertebrates
... constraints (space, substrate and water currents)(Ruppert and Barnes 1994). Sponges are capable of reproducing both asexually and sexually, including the ability to brood eggs and release flagellated larvae. They are also able to regenerate themselves after they have been broken or injured (Ruppert ...
... constraints (space, substrate and water currents)(Ruppert and Barnes 1994). Sponges are capable of reproducing both asexually and sexually, including the ability to brood eggs and release flagellated larvae. They are also able to regenerate themselves after they have been broken or injured (Ruppert ...
recruitment limitation and population density in the harvester ant
... interacting with one another. Plots of this size also have historical precedents in other studies of desert granivores (e.g. Davidson et al 1985, Brown and Munger 1985, Munger and Brown 1980). We subdivided the life-cycle of P. occidentalis into three stages: queens founding nests, new colonies, and ...
... interacting with one another. Plots of this size also have historical precedents in other studies of desert granivores (e.g. Davidson et al 1985, Brown and Munger 1985, Munger and Brown 1980). We subdivided the life-cycle of P. occidentalis into three stages: queens founding nests, new colonies, and ...
Significance of Plankton Community Structure and Nutrient
... multiflagellated structure (the vermiforme), which fragments within a few hours, releasing hundreds of dinospores, each potentially capable of infecting a novel host [11, 12]. This simple life-cycle, combined with a short generation time, make Amoebophrya spp. excellent models for studying host-para ...
... multiflagellated structure (the vermiforme), which fragments within a few hours, releasing hundreds of dinospores, each potentially capable of infecting a novel host [11, 12]. This simple life-cycle, combined with a short generation time, make Amoebophrya spp. excellent models for studying host-para ...
Natural Selection - HCC Learning Web
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
Effect of abiotic factors on reproduction in the centre and periphery
... Variables such as weather or other abiotic factors should have a higher influence on demographic rates in border areas than in central areas, given that climatic adaptation might be important in determining range borders. Similarly, for a given area, the relationship between weather and reproduction ...
... Variables such as weather or other abiotic factors should have a higher influence on demographic rates in border areas than in central areas, given that climatic adaptation might be important in determining range borders. Similarly, for a given area, the relationship between weather and reproduction ...
BiomePresentation project
... to find out about one of the world’s biomes 2. Each group will orally present their biome to the class in PowerPoint or I Movie. (upload to Mrs. Dunnavant’s school web page) 3. Each student will become familiar with the names and basic characteristics of the different biomes and the populations they ...
... to find out about one of the world’s biomes 2. Each group will orally present their biome to the class in PowerPoint or I Movie. (upload to Mrs. Dunnavant’s school web page) 3. Each student will become familiar with the names and basic characteristics of the different biomes and the populations they ...
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.