IMPACTS OF BIOLOGICAL INVASIONS ON FRESHWATER
... observed in species-poor systems such as alpine lakes, desert pools, isolated springs and oligotrophic waters (Moyle & Light 1996), but other studies have demonstrated that even species-rich freshwater systems are vulnerable to disruption. For example, North American rivers contain the planet’s rich ...
... observed in species-poor systems such as alpine lakes, desert pools, isolated springs and oligotrophic waters (Moyle & Light 1996), but other studies have demonstrated that even species-rich freshwater systems are vulnerable to disruption. For example, North American rivers contain the planet’s rich ...
Exam #1 Practice Questions
... discrete exponential model confront , and how does it change the model? Give an example of a species that would be best modeled with the discrete exponential. Answer: 1) Closed population (no migration) 2) Constant birth and death rates (unlimited resources) 3) No age, size or stage structure ...
... discrete exponential model confront , and how does it change the model? Give an example of a species that would be best modeled with the discrete exponential. Answer: 1) Closed population (no migration) 2) Constant birth and death rates (unlimited resources) 3) No age, size or stage structure ...
Equal partnership: two trematode species, not one, manipulate the
... results in increased predation by birds on cockles, and thus enhanced transmission rates of the parasite to its bird definitive hosts. This host manipulation by the trematode is costly: fish regularly crop the tip of the foot of cockles stranded on the sediment surface, killing any metacercariae the ...
... results in increased predation by birds on cockles, and thus enhanced transmission rates of the parasite to its bird definitive hosts. This host manipulation by the trematode is costly: fish regularly crop the tip of the foot of cockles stranded on the sediment surface, killing any metacercariae the ...
1 FORAGING NICHES AND RESOURCE PARTITIONING
... broadening of niches seen in Caribbean island bird assemblages in response to the absence of a competitor (Cox & Ricklefs 1977). While scientists increasingly began to study competition through quantitative and qualitative differences in niche characteristics, various concerns were raised about suc ...
... broadening of niches seen in Caribbean island bird assemblages in response to the absence of a competitor (Cox & Ricklefs 1977). While scientists increasingly began to study competition through quantitative and qualitative differences in niche characteristics, various concerns were raised about suc ...
Can community-protected areas conserve biodiversity in human
... [42] nomenclature, and sorted images to independent capture events, considering as independent two images of the same species in the same site separated by more than 12 hours. This relatively long time span between independent captures was used to avoid overestimation of the abundance of species wit ...
... [42] nomenclature, and sorted images to independent capture events, considering as independent two images of the same species in the same site separated by more than 12 hours. This relatively long time span between independent captures was used to avoid overestimation of the abundance of species wit ...
The diversity–stability debate
... There exists little doubt that the Earth’s biodiversity is declining. The Nature Conservancy, for example, has documented that one-third of the plant and animal species in the United States are now at risk of extinction. The problem is a monumental one, and forces us to consider in depth how we expe ...
... There exists little doubt that the Earth’s biodiversity is declining. The Nature Conservancy, for example, has documented that one-third of the plant and animal species in the United States are now at risk of extinction. The problem is a monumental one, and forces us to consider in depth how we expe ...
Ecological change, changing ecology
... rodent cycle. In Fennoscandia, the fading out of the rodent cycles, possibly associated to climate change, has been determined as one of the causes of the dramatic decline in arctic fox populations. Here we study an arctic fox population in the low Arctic on Yamal peninsula, Russia. Contrary to expe ...
... rodent cycle. In Fennoscandia, the fading out of the rodent cycles, possibly associated to climate change, has been determined as one of the causes of the dramatic decline in arctic fox populations. Here we study an arctic fox population in the low Arctic on Yamal peninsula, Russia. Contrary to expe ...
Invasive and Other Problematic Species, Genes and Diseases
... native and non-native plants, animals, pathogens, microbes, and genetic materials that have or are predicted to have harmful effects on biodiversity following their introduction, spread and/or increase in abundance. This definition encompasses a broad array of organisms, and the types of impacts to ...
... native and non-native plants, animals, pathogens, microbes, and genetic materials that have or are predicted to have harmful effects on biodiversity following their introduction, spread and/or increase in abundance. This definition encompasses a broad array of organisms, and the types of impacts to ...
Chap.19 Extinction, conservation and restoration
... 19.3 Body size, longevity, and population size interact to affect the risk of extinction. • The rate at which the population returns to its equilibrium is referred t as the resilience of the population. • Pimm (1991) Longevity and body size – In cases in which population are small, all else being e ...
... 19.3 Body size, longevity, and population size interact to affect the risk of extinction. • The rate at which the population returns to its equilibrium is referred t as the resilience of the population. • Pimm (1991) Longevity and body size – In cases in which population are small, all else being e ...
A trait-based approach to community assembly
... note at the outset. First, like all ideas in community ecology, they are intrinsically scale-dependent. The partitioning of trait values into alpha vs. beta components will depend on the scale used to define a community. In the effort to better link functional ecology to both gradient analysis and c ...
... note at the outset. First, like all ideas in community ecology, they are intrinsically scale-dependent. The partitioning of trait values into alpha vs. beta components will depend on the scale used to define a community. In the effort to better link functional ecology to both gradient analysis and c ...
Bridled Nailtail Wallaby (Onychogalea fraenata)
... Bridled Nailtail is to hide rather than flee. ...
... Bridled Nailtail is to hide rather than flee. ...
Manier MK., and SJ. Arnold. 2006. Ecological correlates of population genetic structure: a comparative approach using a vertebrate metacommunity. Proceedings of the Royal Society B 273:3001-3009.
... (Kephart 1982; Kephart & Arnold 1982). The two snake species exhibit source–sink dynamics in this study system and show correlated genetic structure among the sites where they coexist (Manier & Arnold 2005). If the shared landscape played a major role in the observed pattern, one would expect an unr ...
... (Kephart 1982; Kephart & Arnold 1982). The two snake species exhibit source–sink dynamics in this study system and show correlated genetic structure among the sites where they coexist (Manier & Arnold 2005). If the shared landscape played a major role in the observed pattern, one would expect an unr ...
Mammals of the Bodoquena Mountains, Mammals of the
... & FEER 1997). The three first groups comprehend more than 50% of all Neotropical species, and little is known on their geographic distribution and biology in several sub-regions. Mato Grosso do Sul is a Brazilian state poorly known on its mammalian fauna, particularly the small mammal fauna (EISENBE ...
... & FEER 1997). The three first groups comprehend more than 50% of all Neotropical species, and little is known on their geographic distribution and biology in several sub-regions. Mato Grosso do Sul is a Brazilian state poorly known on its mammalian fauna, particularly the small mammal fauna (EISENBE ...
Food web assembly rules
... recently been provided [11, 33]. Specifically, the data distinguish three types of links: (i) links between free-living species only (“Free”), (ii) additional links between parasites and other species (“Par”) and (iii) links from freeliving consumers to the parasites of their resources (“ParCon”), i ...
... recently been provided [11, 33]. Specifically, the data distinguish three types of links: (i) links between free-living species only (“Free”), (ii) additional links between parasites and other species (“Par”) and (iii) links from freeliving consumers to the parasites of their resources (“ParCon”), i ...
Processes of ecometric patterning: modelling functional traits
... from quantitative genetic and metapopulation theory: heritability, phenotypic variance, selection intensity, extirpation probability, dispersal probability, and population size. Our overarching goal is to determine how the balance between these parameters at the population level affects ecometric ou ...
... from quantitative genetic and metapopulation theory: heritability, phenotypic variance, selection intensity, extirpation probability, dispersal probability, and population size. Our overarching goal is to determine how the balance between these parameters at the population level affects ecometric ou ...
Competition
... populations of G fuliginosa eats smaller seeds than G fortis: they partition the resource. • When found on separate islands, both species have beaks of intermediate size, and exploit a wider variety of seeds. • These inter-population differences might have evolved in response to interspecific compet ...
... populations of G fuliginosa eats smaller seeds than G fortis: they partition the resource. • When found on separate islands, both species have beaks of intermediate size, and exploit a wider variety of seeds. • These inter-population differences might have evolved in response to interspecific compet ...
AP Biology Summer Assignment- Due Date: Wednesday, Aug 21s
... prey species. Sea urchins were shown to limit the abundance and distribution of seaweeds. Abiotic Factors Global patterns of geographic distributions are influenced by abiotic factors such as regional differences in temperature, rainfall, and light. An environment may have both spatial and temporal ...
... prey species. Sea urchins were shown to limit the abundance and distribution of seaweeds. Abiotic Factors Global patterns of geographic distributions are influenced by abiotic factors such as regional differences in temperature, rainfall, and light. An environment may have both spatial and temporal ...
The myriad consequences of hunting for vertebrates and plants in
... opossums and carnivores, secretive primates, and several edentates (anteaters, sloths and armadillos). The mammal species least likely to be hunted are all small and include bats, most rodents, and the smallest primates. The ability of wild species to withstand exploitation by humans varies with gen ...
... opossums and carnivores, secretive primates, and several edentates (anteaters, sloths and armadillos). The mammal species least likely to be hunted are all small and include bats, most rodents, and the smallest primates. The ability of wild species to withstand exploitation by humans varies with gen ...
Population spatial structure, human
... make up the population and the probability of exchange of individuals among them. Therefore, population spatial structure depends on the interaction between the landscape spatial pattern and the dispersal characteristics of the organisms. Human activities have profound effects on population spatial ...
... make up the population and the probability of exchange of individuals among them. Therefore, population spatial structure depends on the interaction between the landscape spatial pattern and the dispersal characteristics of the organisms. Human activities have profound effects on population spatial ...
Habitat Selection by Two Competing Species in a Two
... Let N1 and N2 be the population densities in habitats 1 and 2, respectively, and n and 1 ⫺ n be the respective proportions of animals in habitat 1 and 2. Then N1 p nN and N2 p (1 ⫺ n)N, where N denotes the overall population density. Note that n reflects the preference of an average animal for habit ...
... Let N1 and N2 be the population densities in habitats 1 and 2, respectively, and n and 1 ⫺ n be the respective proportions of animals in habitat 1 and 2. Then N1 p nN and N2 p (1 ⫺ n)N, where N denotes the overall population density. Note that n reflects the preference of an average animal for habit ...
Persistence and flow reliability in simple food webs
... (Note that the Holling simulations generally give lower persistence: this is an artefact, depending only on model parameters g and v. These were selected from (0 1), since we have no assumptions on their symmetry.) Fig. 2b shows how the asymmetry in interaction parameters and higher death rates of p ...
... (Note that the Holling simulations generally give lower persistence: this is an artefact, depending only on model parameters g and v. These were selected from (0 1), since we have no assumptions on their symmetry.) Fig. 2b shows how the asymmetry in interaction parameters and higher death rates of p ...
A Review of Endemic Species in the Eastern Arc Afromontane Region
... Causes Of Endemism in the Eastern Arc The Eastern Arc has been the focus of many recent studies on both floral and faunal endemism. There are many theories that provide some insight into why the Eastern Arc houses such a large number of endemic species. It is not just that the endemic species are g ...
... Causes Of Endemism in the Eastern Arc The Eastern Arc has been the focus of many recent studies on both floral and faunal endemism. There are many theories that provide some insight into why the Eastern Arc houses such a large number of endemic species. It is not just that the endemic species are g ...
Consequences of low mobility in spatially and temporally
... 1991) and allow predictions of local and regional dynamics based on species mobility. In general, habitat fragmentation has been found to threaten metapopulation persistence by limiting recolonization of vacated patches (Bascompte & Sole 1996; Travis & Dytham 1999; With & King 1999). Interpatch disp ...
... 1991) and allow predictions of local and regional dynamics based on species mobility. In general, habitat fragmentation has been found to threaten metapopulation persistence by limiting recolonization of vacated patches (Bascompte & Sole 1996; Travis & Dytham 1999; With & King 1999). Interpatch disp ...
here - Azuero Earth Project
... opossums and carnivores, secretive primates, and several edentates (anteaters, sloths and armadillos). The mammal species least likely to be hunted are all small and include bats, most rodents, and the smallest primates. The ability of wild species to withstand exploitation by humans varies with gen ...
... opossums and carnivores, secretive primates, and several edentates (anteaters, sloths and armadillos). The mammal species least likely to be hunted are all small and include bats, most rodents, and the smallest primates. The ability of wild species to withstand exploitation by humans varies with gen ...
An Ecological Assessment of
... Annually, the WMA floods completely in early June and a pond is naturally drawn down throughout the summer as floodwaters recede. Due largely to past agricultural practices, much of the area is currently dominated by Reed Canary Grass (RCG) an invasive European cultivar that limits both the occurren ...
... Annually, the WMA floods completely in early June and a pond is naturally drawn down throughout the summer as floodwaters recede. Due largely to past agricultural practices, much of the area is currently dominated by Reed Canary Grass (RCG) an invasive European cultivar that limits both the occurren ...