Predator-Dependent Species-Area Relationships
... an assumption of organism saturation in landscapes implying that the density of individuals is a constant, r (Hubbell 2001, pp. 54–55). Indeed, the universal biodiversity number, v, is a function of r. Our model assumes that predators decrease individual density in a way that is proportional to prey ...
... an assumption of organism saturation in landscapes implying that the density of individuals is a constant, r (Hubbell 2001, pp. 54–55). Indeed, the universal biodiversity number, v, is a function of r. Our model assumes that predators decrease individual density in a way that is proportional to prey ...
CHAPTER 53
... If keystone species are removed, community structure is greatly affected. Ecologist Robert Paine of the University of Washington first developed the concept of keystone species when he removed the sea star Pisaster ochraceous from rocky intertidal communities. o Pisaster is a predator on mussels suc ...
... If keystone species are removed, community structure is greatly affected. Ecologist Robert Paine of the University of Washington first developed the concept of keystone species when he removed the sea star Pisaster ochraceous from rocky intertidal communities. o Pisaster is a predator on mussels suc ...
Principles of Ecology
... ‘Population’ is defined as a group of freely interbreeding individuals of the same species present in a specific area at a given time. For example, when we say that the population of a city is 50,000, we mean that there are 50,000 humans in that city. However, all populations of humans living in any ...
... ‘Population’ is defined as a group of freely interbreeding individuals of the same species present in a specific area at a given time. For example, when we say that the population of a city is 50,000, we mean that there are 50,000 humans in that city. However, all populations of humans living in any ...
![3. Ecosystems Booklet [A2]](http://s1.studyres.com/store/data/000907128_1-17cd24bf3612766ddeeb25d04dd2543c-300x300.png)
3. Ecosystems Booklet [A2]
... to the energy trapped and passed on at each trophic level. Each trophic level in a food chain or web contains a certain amount of biomass: the dry mass of all organic matter contained in its organisms. Energy stored in biomass is transferred from one trophic level to another (by eating, defaecation ...
... to the energy trapped and passed on at each trophic level. Each trophic level in a food chain or web contains a certain amount of biomass: the dry mass of all organic matter contained in its organisms. Energy stored in biomass is transferred from one trophic level to another (by eating, defaecation ...
First record of a tunnel breeding population of Pleurodeles waltl and
... of breeding was reported when a few larvae were found in the stream. The nearest source of water outside the cave is more than 200 m away. This aquatic environment has neither plants nor stones in the water, so eggs must have been laid in the ground or in some holes at the sides of the tunnel where ...
... of breeding was reported when a few larvae were found in the stream. The nearest source of water outside the cave is more than 200 m away. This aquatic environment has neither plants nor stones in the water, so eggs must have been laid in the ground or in some holes at the sides of the tunnel where ...
AN AGENDA FOR INVASION BIOLOGY
... similar but whose populations have not spread. It may well be that invaders as a group do not differ consistently from other species in the donor biota, but without careful comparative studies we cannot make any pronouncements on the subject. One potentially promising approach derives from historica ...
... similar but whose populations have not spread. It may well be that invaders as a group do not differ consistently from other species in the donor biota, but without careful comparative studies we cannot make any pronouncements on the subject. One potentially promising approach derives from historica ...
Full text
... scale disturbance. As a result of the construction, the canopy is open as most of the flora was removed to allow heavy machinery accessibility to the site. After a disturbance, time is required for individuals to immigrate from surrounding areas, so it is understandable that only a few species were ...
... scale disturbance. As a result of the construction, the canopy is open as most of the flora was removed to allow heavy machinery accessibility to the site. After a disturbance, time is required for individuals to immigrate from surrounding areas, so it is understandable that only a few species were ...
... that different levels of richness played in biodiversity effects at different times during the experiments (Fig. 2 and figs. S6 and S7). In the first 4 years of both experiments, the effect on biomass (shown as log10[biomass ratios]) of an increase in richness from one to four species was strong (Fi ...
biodiversity
... The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) was created in 1977 as the single, official, scientifically based, national classification of wildlife organization for species at risk in Canada. Its role is to assess the conservation status of species that may be at risk and r ...
... The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) was created in 1977 as the single, official, scientifically based, national classification of wildlife organization for species at risk in Canada. Its role is to assess the conservation status of species that may be at risk and r ...
Hui y McGeoch 2006
... et al., 2000), which is closely related to several previous studies (Orr and Orr, 1996; Gavrilets, 1999). Allopatric speciation is the origin of two or more species resulting from divergent evolution of populations that are geographically isolated from one another. Speciation through reproductive is ...
... et al., 2000), which is closely related to several previous studies (Orr and Orr, 1996; Gavrilets, 1999). Allopatric speciation is the origin of two or more species resulting from divergent evolution of populations that are geographically isolated from one another. Speciation through reproductive is ...
Branchinecta of North America
... pool duration. Lynch and Spitze (unpubl. ms.) summarize work on Daphnia species and conclude that quantitative genetic variation among populations is equal to or greater than that of singlelocus genetic variation. These studies concentrate on the post-hatching stages of the life cycle, but as in ann ...
... pool duration. Lynch and Spitze (unpubl. ms.) summarize work on Daphnia species and conclude that quantitative genetic variation among populations is equal to or greater than that of singlelocus genetic variation. These studies concentrate on the post-hatching stages of the life cycle, but as in ann ...
Part 4: Ancient Food Webs
... A way to compare ecological networks with different numbers of species and links ...
... A way to compare ecological networks with different numbers of species and links ...
Potential Science Needs 2015
... Prioritization of sites for protection, preservation important cultural resource sites level, NGO’s or possible relocation Trends analysis of wetland change at Gov’t- federal to local Regional changes in the distribution and the East coast (regional) scale level, NGO’s abundance of wetlands is unkno ...
... Prioritization of sites for protection, preservation important cultural resource sites level, NGO’s or possible relocation Trends analysis of wetland change at Gov’t- federal to local Regional changes in the distribution and the East coast (regional) scale level, NGO’s abundance of wetlands is unkno ...
Science at your fingertips - School
... Yes, the gaur, in 2001. Gaur numbers dwindled to about 36,000 because they were hunted by humans and because the forests, bamboo jungles and grasslands in India and Southeast Asia where they live have become degraded. Some researchers believe cloning may offer the only way to save such species from ...
... Yes, the gaur, in 2001. Gaur numbers dwindled to about 36,000 because they were hunted by humans and because the forests, bamboo jungles and grasslands in India and Southeast Asia where they live have become degraded. Some researchers believe cloning may offer the only way to save such species from ...
54_DetailLectOut w Pictures
... If keystone species are removed, community structure is greatly affected. Ecologist Robert Paine of the University of Washington first developed the concept of keystone species when he removed the sea star Pisaster ochraceous from rocky intertidal communities. o Pisaster is a predator on mussels suc ...
... If keystone species are removed, community structure is greatly affected. Ecologist Robert Paine of the University of Washington first developed the concept of keystone species when he removed the sea star Pisaster ochraceous from rocky intertidal communities. o Pisaster is a predator on mussels suc ...
ecological species concept
... different from each other: coloring, bone structure, and so on. B. Determine whether captured individuals from the two different populations will mate and produce offspring in a laboratory fish tank. C. Determine whether individuals from one population will interbreed with individuals from the other ...
... different from each other: coloring, bone structure, and so on. B. Determine whether captured individuals from the two different populations will mate and produce offspring in a laboratory fish tank. C. Determine whether individuals from one population will interbreed with individuals from the other ...
2015-01-03_UTRB-call_ver17
... The significance of various threats to UTRB imperiled aquatic species vary across the basin’s three major physiographic provinces (Figure 1). • Oil and Natural Gas ...
... The significance of various threats to UTRB imperiled aquatic species vary across the basin’s three major physiographic provinces (Figure 1). • Oil and Natural Gas ...
A new hypothesis to explain the coexistence of n species in the
... size of the various populations, the growth rate of each population increases with the concentration of substrate. The second set expresses that a competition is exerted by each j species on the i species: the bigger the concentration of the j th species, the smaller the growth rate of the ith speci ...
... size of the various populations, the growth rate of each population increases with the concentration of substrate. The second set expresses that a competition is exerted by each j species on the i species: the bigger the concentration of the j th species, the smaller the growth rate of the ith speci ...
13.1 Ecologists Study Relationships KEY CONCEPT
... Ecological research methods include observation, experimentation, and modeling. • Observation is the act of carefully watching something ...
... Ecological research methods include observation, experimentation, and modeling. • Observation is the act of carefully watching something ...
13.1 Ecologists Study Relationships
... Ecological research methods include observation, experimentation, and modeling. • Observation is the act of carefully watching something ...
... Ecological research methods include observation, experimentation, and modeling. • Observation is the act of carefully watching something ...
Niche and fitness differences relate the maintenance of
... > 1) means that niche differentiation (partitioning of either resources or natural enemies), positive ...
... > 1) means that niche differentiation (partitioning of either resources or natural enemies), positive ...
Mammals on mountainsides: elevational patterns of diversity
... stimulated by data from model empirical systems. This is certainly true in biogeography. Patterns of distribution of organisms on islands have served repeatedly as the inductive inspiration for new theory, from Darwin’s (1859) theory of evolution by natural selection, to Mayr’s (1942) ideas of speci ...
... stimulated by data from model empirical systems. This is certainly true in biogeography. Patterns of distribution of organisms on islands have served repeatedly as the inductive inspiration for new theory, from Darwin’s (1859) theory of evolution by natural selection, to Mayr’s (1942) ideas of speci ...
Title: Fine-scale and Microhabitat Factors Influencing Terrestrial
... spatially replicated sampling designs (Royle 2004) will be used to analyze count data and estimate terrestrial amphibian abundances as a function of site-level (i.e. aspect, slope, and elevation) and environmental (i.e. soil chemistry, moisture, and temperature; CWD, leaf-litter depth, and canopy st ...
... spatially replicated sampling designs (Royle 2004) will be used to analyze count data and estimate terrestrial amphibian abundances as a function of site-level (i.e. aspect, slope, and elevation) and environmental (i.e. soil chemistry, moisture, and temperature; CWD, leaf-litter depth, and canopy st ...
New Zealand`s dryland biodiversity situation
... Identify spatial pattern of traits syndromes Identify whether (and if so what) traits predict successful secondary succession and where ...
... Identify spatial pattern of traits syndromes Identify whether (and if so what) traits predict successful secondary succession and where ...
Taking species abundance distributions beyond
... realized that individuals within populations of the same species can strongly vary in size, due in part to age structure, with important consequences for ecological interactions (Werner & Gilliam 1984; Kooijman 2000). Hence, different abundance measures are not necessarily well correlated (Saint-Ger ...
... realized that individuals within populations of the same species can strongly vary in size, due in part to age structure, with important consequences for ecological interactions (Werner & Gilliam 1984; Kooijman 2000). Hence, different abundance measures are not necessarily well correlated (Saint-Ger ...