the usefulness of ecological niche concepts in understanding plant
... is the differential utilisation of resources among species so that they can avoid competition and be able to coexist (MacArthur & Wilson, 1967; MacArthur, 1972; Schoener, 1986; Chesson, 2000). If there is no such differentiation, then it will follow the Competitive Exclusion Principle or ‘Gause’s Pr ...
... is the differential utilisation of resources among species so that they can avoid competition and be able to coexist (MacArthur & Wilson, 1967; MacArthur, 1972; Schoener, 1986; Chesson, 2000). If there is no such differentiation, then it will follow the Competitive Exclusion Principle or ‘Gause’s Pr ...
Senior Thesis Abstracts
... quaaga) manage trade-offs between signal efficacy and the variable factors in which signaling may be specific to. We explore three such contexts, namely environmental and ecological, social and behavioral contexts and look at the posterior components of behavior, such as the frequency and length of ...
... quaaga) manage trade-offs between signal efficacy and the variable factors in which signaling may be specific to. We explore three such contexts, namely environmental and ecological, social and behavioral contexts and look at the posterior components of behavior, such as the frequency and length of ...
Metadata_Bibliography
... Kearsley, M. J. C., and T. G. Whitham. 1989. Developmental changes in resistance to herbivory: implications for individuals and populations. Ecology 70:422-434. Klun, J. A., and J. F. Robinson. 1969. Concentration of two 1,4-benzoxazinones in a dent corn at various stages of development of the plant ...
... Kearsley, M. J. C., and T. G. Whitham. 1989. Developmental changes in resistance to herbivory: implications for individuals and populations. Ecology 70:422-434. Klun, J. A., and J. F. Robinson. 1969. Concentration of two 1,4-benzoxazinones in a dent corn at various stages of development of the plant ...
How parasites divide resources: a test of the niche apportionment
... Over the past decade several studies have used parasite communities in analyses of community structure. In particular many investigators have used presence– absence data to test for patterns of parasite species co-occurrence that depart from various null models (Guégan & Hugueny 1994; Poulin 1996; W ...
... Over the past decade several studies have used parasite communities in analyses of community structure. In particular many investigators have used presence– absence data to test for patterns of parasite species co-occurrence that depart from various null models (Guégan & Hugueny 1994; Poulin 1996; W ...
chapt 17
... natural disasters can change carrying capacity for a given population. The size of the organism and the size of its habitat can determine carrying capacity. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
... natural disasters can change carrying capacity for a given population. The size of the organism and the size of its habitat can determine carrying capacity. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
What is an Invasive Species?
... taxonomic resolution is essential for determining which species in a given area are native (i.e. evolved in that area, or at least migrated into the area before the age of human domination of the world’s ecosystems), or alien (i.e. moved there directly by humans or indirectly by transport means asso ...
... taxonomic resolution is essential for determining which species in a given area are native (i.e. evolved in that area, or at least migrated into the area before the age of human domination of the world’s ecosystems), or alien (i.e. moved there directly by humans or indirectly by transport means asso ...
Darwin and evolution: a set of activities based on the evolution of
... Table 1 shows the DNA sequence of a small stretch of the gene for a particular milk protein called casein in a number of different mammals. The sequence differs from one mammal to another, and those shown are from two species of whale, several familiar ungulate species (members of the order Artiodac ...
... Table 1 shows the DNA sequence of a small stretch of the gene for a particular milk protein called casein in a number of different mammals. The sequence differs from one mammal to another, and those shown are from two species of whale, several familiar ungulate species (members of the order Artiodac ...
Biology special study material
... Promoter ; provides site for binding of RNA polymerase 1 Structural Genes; codes for enzymes / gene products required for metabolism of lactose 1 (b) If Lactose is withdrawn from the culture medium the operon is not induced or expressed ...
... Promoter ; provides site for binding of RNA polymerase 1 Structural Genes; codes for enzymes / gene products required for metabolism of lactose 1 (b) If Lactose is withdrawn from the culture medium the operon is not induced or expressed ...
Hy-Line - LGC Group
... that variants in the gene may be relevant to the selection of commercial egg-laying poultry lines. In this study (Fulton et al., 2012), exons 2-6 of the OCX32 gene were sequenced in multiple elite commercial egg-laying lines, and SNP detection and analysis carried out using LGC’s KASPTM genotyping c ...
... that variants in the gene may be relevant to the selection of commercial egg-laying poultry lines. In this study (Fulton et al., 2012), exons 2-6 of the OCX32 gene were sequenced in multiple elite commercial egg-laying lines, and SNP detection and analysis carried out using LGC’s KASPTM genotyping c ...
conclusions from phytoplankton surveys
... The spatial scale Wilson takes extreme care to quantify the spatial scale, and he uses a value of 103 m2 (0.1 ha) as the limit of the within community (alpha) diversity. Consequently, he excludes most of the possible case studies that would support IDH (listed under 15-17 in Table 1 in Wilson, 1990) ...
... The spatial scale Wilson takes extreme care to quantify the spatial scale, and he uses a value of 103 m2 (0.1 ha) as the limit of the within community (alpha) diversity. Consequently, he excludes most of the possible case studies that would support IDH (listed under 15-17 in Table 1 in Wilson, 1990) ...
The measure of order and disorder in the distribution of species in
... back to its initial conditions and rerun the extinction process repeatedly. In a perfectly "cold" system each species present in the assemblage would go extinct in turn as each species falls below its minimum sustainable population size, and that order would not change no matter how many times the e ...
... back to its initial conditions and rerun the extinction process repeatedly. In a perfectly "cold" system each species present in the assemblage would go extinct in turn as each species falls below its minimum sustainable population size, and that order would not change no matter how many times the e ...
Molecular evolution of the melanocortin 1-receptor - Funpec-RP
... Patterns of selection and rates of evolutionary change in MC1R were evaluated with Yang and Bielawski (2000) tests. The established structure and inferred function of the MC1R protein (Chhajlani et al., 1996) allowed us to make a priori predictions about the domains expected to evolve under the rela ...
... Patterns of selection and rates of evolutionary change in MC1R were evaluated with Yang and Bielawski (2000) tests. The established structure and inferred function of the MC1R protein (Chhajlani et al., 1996) allowed us to make a priori predictions about the domains expected to evolve under the rela ...
013368718X_CH04_047
... 10. What happened to the number of wolves on Isle Royale between 1975 and 1985? 11. What happened to the moose population when the number of wolves was low? 12. What is the relationship between the moose and the wolves on Isle Royale? 13. Is the number of moose on the island a density-dependent or d ...
... 10. What happened to the number of wolves on Isle Royale between 1975 and 1985? 11. What happened to the moose population when the number of wolves was low? 12. What is the relationship between the moose and the wolves on Isle Royale? 13. Is the number of moose on the island a density-dependent or d ...
as a PDF
... The diversity of bee-pollinated trees is so large that no generalizations can be made with respect to flower morphology or flowering pattern. Bee flowers, especially those that are pollinated by small bees can be relatively small and inconspicuous, and white, pale, or green in color. Flowers pollina ...
... The diversity of bee-pollinated trees is so large that no generalizations can be made with respect to flower morphology or flowering pattern. Bee flowers, especially those that are pollinated by small bees can be relatively small and inconspicuous, and white, pale, or green in color. Flowers pollina ...
The challenge posed by newly discovered cryptic species
... DNA screening (e.g. Arlettaz et al., 1997a; Mayer et al., 2007). In 2001, a new cryptic species of long-eared bat, Plecotus macrobullaris, was discovered (Kiefer & Veith, 2001; Spitzenberger et al., 2002, 2003). This species bears a striking resemblance to two of its sibling species, Plecotus auritu ...
... DNA screening (e.g. Arlettaz et al., 1997a; Mayer et al., 2007). In 2001, a new cryptic species of long-eared bat, Plecotus macrobullaris, was discovered (Kiefer & Veith, 2001; Spitzenberger et al., 2002, 2003). This species bears a striking resemblance to two of its sibling species, Plecotus auritu ...
Dynamics of ecological communities in variable environments
... extinction cascades increases with increasing species richness especially when the correlation among species is low. Initial stochastic extinctions of primary producer species unleash bottom-up extinction cascades, where specialist consumers are especially vulnerable. Although the risks of extinctio ...
... extinction cascades increases with increasing species richness especially when the correlation among species is low. Initial stochastic extinctions of primary producer species unleash bottom-up extinction cascades, where specialist consumers are especially vulnerable. Although the risks of extinctio ...
Predator-Dependent Species-Area Relationships
... ponds with and without zooplanktivorous fishes. Our results emphasize that anthropogenic activities yield simultaneous changes in processes altering diversity and that it is critical that we understand how these components of anthropogenic change interact to impact diversity. Keywords: biodiversity, ...
... ponds with and without zooplanktivorous fishes. Our results emphasize that anthropogenic activities yield simultaneous changes in processes altering diversity and that it is critical that we understand how these components of anthropogenic change interact to impact diversity. Keywords: biodiversity, ...
Karakterisasi Molekular Fragmen Gen mexB Isolat Pseudomonas
... ABSTRACT Antibiotics have been widely used in the treatment of infectious diseases. However, their effectiveness has been questioned due to the tendency of some bacterial resistance to antibiotics. Pseudomonas aeruginosa among others has been known to be resistant to several antibiotics due to its M ...
... ABSTRACT Antibiotics have been widely used in the treatment of infectious diseases. However, their effectiveness has been questioned due to the tendency of some bacterial resistance to antibiotics. Pseudomonas aeruginosa among others has been known to be resistant to several antibiotics due to its M ...
Extreme diversity of tropical parasitoid wasps exposed by iterative
... A single wasp specimen from each parasitized caterpillar was barcoded and submitted for morphological analysis. Barcodes greater than 500 bp in length were generated for 75% of these wasps, and a shorter CO1 sequence was obtained from an additional 12.3% of the specimens, providing a barcode record ...
... A single wasp specimen from each parasitized caterpillar was barcoded and submitted for morphological analysis. Barcodes greater than 500 bp in length were generated for 75% of these wasps, and a shorter CO1 sequence was obtained from an additional 12.3% of the specimens, providing a barcode record ...
Threatened species of the Northern Territory
... population size and trends. Decline is evident from variation between historic statements about status and current assessments: most notably Dahl (1897) reported that “on the rivers Mary and Katherine it was frequently observed. In fact nearly everywhere inland it was very constant, and on a moonlig ...
... population size and trends. Decline is evident from variation between historic statements about status and current assessments: most notably Dahl (1897) reported that “on the rivers Mary and Katherine it was frequently observed. In fact nearly everywhere inland it was very constant, and on a moonlig ...
A hierarchical deductive approach for functional types in disturbed
... dynamic model for disturbed ecosystems. Although we expect this hierarchical framework to be valid for a wide range of biomes, the traits to characterize each IPCD parameter may be different in different regions depending on the biophysical and evolutionary context (Pausas 2001; Díaz et al. 2002). I ...
... dynamic model for disturbed ecosystems. Although we expect this hierarchical framework to be valid for a wide range of biomes, the traits to characterize each IPCD parameter may be different in different regions depending on the biophysical and evolutionary context (Pausas 2001; Díaz et al. 2002). I ...
Section 5-2 worksheet
... Density-Independent Limiting Factors Some limiting factors do not necessarily depend on population size. Density-independent limiting factors depend on population density, or the number of organisms per unit area. Examples include severe weather, natural disasters, and human activities. Some of thes ...
... Density-Independent Limiting Factors Some limiting factors do not necessarily depend on population size. Density-independent limiting factors depend on population density, or the number of organisms per unit area. Examples include severe weather, natural disasters, and human activities. Some of thes ...
WB_A_72-74
... Density-Independent Limiting Factors Some limiting factors do not necessarily depend on population size. Density-independent limiting factors depend on population density, or the number of organisms per unit area. Examples include severe weather, natural disasters, and human activities. Some of thes ...
... Density-Independent Limiting Factors Some limiting factors do not necessarily depend on population size. Density-independent limiting factors depend on population density, or the number of organisms per unit area. Examples include severe weather, natural disasters, and human activities. Some of thes ...
- Wiley Online Library
... migration on a tropical bird species in the Southern Hemisphere, where there is ‘a unique opportunity to better understand the evolutionary ecology of bird migration’ (Dingle 2008). Jahn et al. (2010) conducted a detailed individualbased study of tropical kingbirds (Tyrannus melancholicus) to test t ...
... migration on a tropical bird species in the Southern Hemisphere, where there is ‘a unique opportunity to better understand the evolutionary ecology of bird migration’ (Dingle 2008). Jahn et al. (2010) conducted a detailed individualbased study of tropical kingbirds (Tyrannus melancholicus) to test t ...
2005ecology
... August. All sedentary insects on the plants were counted and identified to species in the field where possible. Individuals that were not readily identifiable were collected for identification. Arthropods were only considered to be herbivores if they were observed feeding on the plant or were known ...
... August. All sedentary insects on the plants were counted and identified to species in the field where possible. Individuals that were not readily identifiable were collected for identification. Arthropods were only considered to be herbivores if they were observed feeding on the plant or were known ...