Dominant Species and Diversity: Linking Relative Abundance to
... and the neighbor facilitation model predict equal effects for removals of the same biomass but differ in whether the underlying interaction is competitive or facilitative (fig. 2A, 2B). The resource complementarity model posits that, on average, the relative abundance of each species reflects the av ...
... and the neighbor facilitation model predict equal effects for removals of the same biomass but differ in whether the underlying interaction is competitive or facilitative (fig. 2A, 2B). The resource complementarity model posits that, on average, the relative abundance of each species reflects the av ...
Ecology unit ch 2-5
... energy available within one trophic level is transferred to organisms in the next ...
... energy available within one trophic level is transferred to organisms in the next ...
Extending the concept of keystone species to
... one species extinction (i.e. having positive Dj) and the average number of species going extinct both increased with relative community size, reflecting dominance effects (Fig. 3a). There was a clear distinction between communities that did not cause any species extinction, and keystone communities, ...
... one species extinction (i.e. having positive Dj) and the average number of species going extinct both increased with relative community size, reflecting dominance effects (Fig. 3a). There was a clear distinction between communities that did not cause any species extinction, and keystone communities, ...
population density
... A lichen is an example of a pioneer species. But “this” is what a lichen has to do with “symbiosis” What is a lichen is two different species (algae conducts photosynthesis and ...
... A lichen is an example of a pioneer species. But “this” is what a lichen has to do with “symbiosis” What is a lichen is two different species (algae conducts photosynthesis and ...
Predator-prey interactions
... The basic dynamics of predator-prey and plant-herbivore systems: a tendency towards cycles. Why?? ...
... The basic dynamics of predator-prey and plant-herbivore systems: a tendency towards cycles. Why?? ...
Biodiversity is Autocatalytic
... by Hutchinson [8] with the definition of hyper-volume, is a powerful tool for understanding the role of each species in its environment. These multidimensional spaces or hypervolumes that include all of a species’ interactions with the biotic and abiotic factors of its environment, led to the consid ...
... by Hutchinson [8] with the definition of hyper-volume, is a powerful tool for understanding the role of each species in its environment. These multidimensional spaces or hypervolumes that include all of a species’ interactions with the biotic and abiotic factors of its environment, led to the consid ...
Marine Ecology 2011, final Lecture 5 pred
... there is some optimal level of predation intensity that will maximize the # of predators without driving the prey extinct. It has been suggested that predators might “manage” prey populations and that this might explain why predators and prey usually coexist. Problem: individuals must cooperate with ...
... there is some optimal level of predation intensity that will maximize the # of predators without driving the prey extinct. It has been suggested that predators might “manage” prey populations and that this might explain why predators and prey usually coexist. Problem: individuals must cooperate with ...
1" 2" 3" Phylogenetic diversity promotes ecosystem stability 4" 5" 6
... 1- Department of Biological Sciences, University of Toronto - Scarborough, 1265 Military trail, Scarborough, ON, Canada, M1C 1A4. 2- Department of Ecology and Evolutionary Biology, University of Toronto, 25 ...
... 1- Department of Biological Sciences, University of Toronto - Scarborough, 1265 Military trail, Scarborough, ON, Canada, M1C 1A4. 2- Department of Ecology and Evolutionary Biology, University of Toronto, 25 ...
Introduction pathways and establishment rates of invasive aquatic
... molluscs, 6.0% crustaceans, and the rest other taxa) that can be searched through the Internet (http://www.fao.org/waicent/ faoinfo/fishery/statist/fisoft/dias/mainpage.htm). Of 566 introductions of 113 species in DIAS, 72.5% were intentional, 13% were accidental, and 14.5% occurred for unknown reas ...
... molluscs, 6.0% crustaceans, and the rest other taxa) that can be searched through the Internet (http://www.fao.org/waicent/ faoinfo/fishery/statist/fisoft/dias/mainpage.htm). Of 566 introductions of 113 species in DIAS, 72.5% were intentional, 13% were accidental, and 14.5% occurred for unknown reas ...
Israa Dorgham
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
... herbivores are controlled by predation is lacking but some evidence has been collected. The conclusion here is that predators must limit their own resources to control herbivore populations, which defines predators as food-limited. By combining the mentioned observations and assumptions, Hairston et ...
The interacting effects of herbivore exclosures and seed addition in
... our study was to determine if small mammals and birds, through herbivory and granivory, affect the relative success of re-colonizing native species in a wet meadow dominated by non-native European grasses. While our results suggest that seed addition can increase species richness in established wet ...
... our study was to determine if small mammals and birds, through herbivory and granivory, affect the relative success of re-colonizing native species in a wet meadow dominated by non-native European grasses. While our results suggest that seed addition can increase species richness in established wet ...
Newly rare or newly common: evolutionary
... In contrast to strong sources of anthropogenic selection like biocides and overharvesting, other sources of anthropogenic impacts or natural resource management schemes are likely to have more complex, less predictable selective effects on populations and communities. This unpredictability likely ar ...
... In contrast to strong sources of anthropogenic selection like biocides and overharvesting, other sources of anthropogenic impacts or natural resource management schemes are likely to have more complex, less predictable selective effects on populations and communities. This unpredictability likely ar ...
Niche filtering, not interspecific resource competition
... co-occur spatially even when they share similar niches (Diamond 1975, Gotelli and ...
... co-occur spatially even when they share similar niches (Diamond 1975, Gotelli and ...
Niches and Community Interactions
... In the the experiment shown in the graph, two species of paramecia (P. aurelia and P. caudatum) were first grown in separate cultures (dashed lines) . In separate cultures, but under the same conditions, both populations grew. However, when both species were grown together in the same culture (solid ...
... In the the experiment shown in the graph, two species of paramecia (P. aurelia and P. caudatum) were first grown in separate cultures (dashed lines) . In separate cultures, but under the same conditions, both populations grew. However, when both species were grown together in the same culture (solid ...
Journal of Experimental Marine Biology and Ecology
... respiration) can be thought of as the metabolic scope for work. In essence, the metabolic scope for work is a proxy for the energy available for non-maintenance functions such as physical activity, growth, and reproduction (metabolic scope for work is therefore a broader term than the more commonly ...
... respiration) can be thought of as the metabolic scope for work. In essence, the metabolic scope for work is a proxy for the energy available for non-maintenance functions such as physical activity, growth, and reproduction (metabolic scope for work is therefore a broader term than the more commonly ...
JVS 2391 Cavieres
... plant’ species, that is species which ameliorate the abiotic environment for other species and facilitate establishment beneath their canopies (Callaway & Walker 1997). Commonly reported ameliorative influences of the nurse plant canopy include: cooler temperatures and lower evaporative stress, incr ...
... plant’ species, that is species which ameliorate the abiotic environment for other species and facilitate establishment beneath their canopies (Callaway & Walker 1997). Commonly reported ameliorative influences of the nurse plant canopy include: cooler temperatures and lower evaporative stress, incr ...
Community assembly and invasion: An experimental Joseph Fargione* , Cynthia S. Brown
... functional guilds. To our knowledge, these are the first experimental results that show the strongest inhibitory effects of resident plants are on introduced plants of the same functional guild. We found that resident functional guilds most strongly inhibited members of their own functional guild an ...
... functional guilds. To our knowledge, these are the first experimental results that show the strongest inhibitory effects of resident plants are on introduced plants of the same functional guild. We found that resident functional guilds most strongly inhibited members of their own functional guild an ...
When everything is not everywhere but species evolve - CERES
... resources. Marine ecologists have therefore yet to set up efficient models of ecosystems as adaptive systems (i.e. whose fundamental characteristics may vary in response to changing environmental conditions), to identify and parameterize their different components (geo-physical parameters, phytoplan ...
... resources. Marine ecologists have therefore yet to set up efficient models of ecosystems as adaptive systems (i.e. whose fundamental characteristics may vary in response to changing environmental conditions), to identify and parameterize their different components (geo-physical parameters, phytoplan ...
Ecological succession - Northwest ISD Moodle
... Events that start primary succession typically cause drastic reductions in the populations of many organisms. Some populations may be eliminated entirely. After the event, conditions may be favorable for pioneer species. For example, the eruption of Mount Saint Helens killed off entire populations o ...
... Events that start primary succession typically cause drastic reductions in the populations of many organisms. Some populations may be eliminated entirely. After the event, conditions may be favorable for pioneer species. For example, the eruption of Mount Saint Helens killed off entire populations o ...
The role of dispersal in shaping plant community Kathryn M. Flinn
... (RDA) of the species abundance data based on all forward-selected principal coordinates of neighbour matrices (PCNM) variables. This RDA was based on only spatial variables ([S]). Filled squares represent positive values, open squares represent negative values and the size of the squares is proporti ...
... (RDA) of the species abundance data based on all forward-selected principal coordinates of neighbour matrices (PCNM) variables. This RDA was based on only spatial variables ([S]). Filled squares represent positive values, open squares represent negative values and the size of the squares is proporti ...
Biology 1020: Course Outline
... This course examines the relationships between organisms and their environments from a number of perspectives. We first examine the relationships between organisms and their physical environment, and then study their contributions to energy flow, trophic structure, and the cycling of matter within e ...
... This course examines the relationships between organisms and their environments from a number of perspectives. We first examine the relationships between organisms and their physical environment, and then study their contributions to energy flow, trophic structure, and the cycling of matter within e ...
