The role of dispersal in shaping plant community Kathryn M. Flinn
... strengths of environmental and spatial effects on community composition across organisms and habitats can yield general insights into where each process should predominate (Cottenie 2005). For example, spatial scale and the range of environmental variation may affect the balance of environmental and ...
... strengths of environmental and spatial effects on community composition across organisms and habitats can yield general insights into where each process should predominate (Cottenie 2005). For example, spatial scale and the range of environmental variation may affect the balance of environmental and ...
Baited technique improves censuses of cryptic fish in complex habitats
... highly complex habitats such as coral reefs. Destructive censuses involving the use of chemicals such as rotenone (Brock 1982) or explosives (Williams & Watcher 1983), are less favoured than visual censuses as they vary in effectiveness for different species, are difficult to quantify and cause cons ...
... highly complex habitats such as coral reefs. Destructive censuses involving the use of chemicals such as rotenone (Brock 1982) or explosives (Williams & Watcher 1983), are less favoured than visual censuses as they vary in effectiveness for different species, are difficult to quantify and cause cons ...
Seicercus and Phylloscopus the Old World leaf warblers ( The roles
... 2001a,b). Given that the external differences between the species are so small, it has been possible to infer likely intermediate stages in their evolution, and relate these to the generation of premating reproductive isolation. In this paper, I review patterns of speciation among the Old World warb ...
... 2001a,b). Given that the external differences between the species are so small, it has been possible to infer likely intermediate stages in their evolution, and relate these to the generation of premating reproductive isolation. In this paper, I review patterns of speciation among the Old World warb ...
Anthro 101 (3) Taxonomy Primates Hadza
... help sort it out, but maybe not, as genes may or may not address issues of human views on essentialism (c.f., Bloom s book of recent) New primate species are found every few years or so, in swampy areas that primatologists have a hard time getting around in Extinction: pets and bushmeat (the next sl ...
... help sort it out, but maybe not, as genes may or may not address issues of human views on essentialism (c.f., Bloom s book of recent) New primate species are found every few years or so, in swampy areas that primatologists have a hard time getting around in Extinction: pets and bushmeat (the next sl ...
Introduced freshwater fishes in a global endemic hotspot
... Australia, they do nonetheless occur. Furthermore, Ebner et al. (2009) found that M. ambigua ...
... Australia, they do nonetheless occur. Furthermore, Ebner et al. (2009) found that M. ambigua ...
Uso de la facilitación y plantas nodriza como técnica de reforestación
... negative effects may be relevant for nurse plants success, since different results could be ...
... negative effects may be relevant for nurse plants success, since different results could be ...
Lepomis cyanellus (Rafinesque, 1819)
... and, a second, with longer gill rakers, better adapted to feed on planktonic prey. Fry feed on zooplankton but Pumpkinseed becomes more piscivorous as it grows larger (DFO, 2011). Lepomis macrochirus is known to be invasive in Japan, Korea (Kawamura et al., 2006), South Africa (Wellcome, 1988) and s ...
... and, a second, with longer gill rakers, better adapted to feed on planktonic prey. Fry feed on zooplankton but Pumpkinseed becomes more piscivorous as it grows larger (DFO, 2011). Lepomis macrochirus is known to be invasive in Japan, Korea (Kawamura et al., 2006), South Africa (Wellcome, 1988) and s ...
Biodiversity, productivity and stability in real food webs
... community biomass (Figure 1). Disturbance has welldocumented effects on local diversity. A high-disturbance environment is extremely unstable and can be tolerated usually only by few specially adapted species. Lowdisturbance environments are highly stable, but often support low species richness beca ...
... community biomass (Figure 1). Disturbance has welldocumented effects on local diversity. A high-disturbance environment is extremely unstable and can be tolerated usually only by few specially adapted species. Lowdisturbance environments are highly stable, but often support low species richness beca ...
Linking invasive exotic vertebrates and their ecosystem impacts in
... Understanding processes and impacts of biological invasions is fundamental for ecology and management. Recent reviews summarized the mechanisms by which invasive species alter entire ecosystems, but quantitative assessments of these mechanisms are lacking for actual assemblages to determine their re ...
... Understanding processes and impacts of biological invasions is fundamental for ecology and management. Recent reviews summarized the mechanisms by which invasive species alter entire ecosystems, but quantitative assessments of these mechanisms are lacking for actual assemblages to determine their re ...
Plumage polymorphism of red-footed boobies
... The same biogeographic hypothesis may be invoked to explain the current distribution of the morphs of redfooted boobies in the western Indian ocean. However, the fact that (1) the Glorieuses once supported a whitetailed brown morph population, and (2) Tromelin is composed of two morphs (with a stabl ...
... The same biogeographic hypothesis may be invoked to explain the current distribution of the morphs of redfooted boobies in the western Indian ocean. However, the fact that (1) the Glorieuses once supported a whitetailed brown morph population, and (2) Tromelin is composed of two morphs (with a stabl ...
The Importance of Ice Ages in Diversification of Arctic Collared
... 1970): glacial advances provided geographic barriers generating intraspecific divergence, and the separated gene pools were protected from mixing by hybrid zones during interglacials leading to allopatric speciation (HEWITT1996). However, molecular systematic studies in passerine birds claimed no in ...
... 1970): glacial advances provided geographic barriers generating intraspecific divergence, and the separated gene pools were protected from mixing by hybrid zones during interglacials leading to allopatric speciation (HEWITT1996). However, molecular systematic studies in passerine birds claimed no in ...
The signal crayfish
... whole of Europe. Crayfish Plague seems to be less of a problem for some of the American species of crayfish, and the Signal Crayfish was deliberately introduced into Sweden to take over from the disappearing European Crayfish. Signal Crayfish The Signal Crayfish (Pacifastacus leniusculus) was a grea ...
... whole of Europe. Crayfish Plague seems to be less of a problem for some of the American species of crayfish, and the Signal Crayfish was deliberately introduced into Sweden to take over from the disappearing European Crayfish. Signal Crayfish The Signal Crayfish (Pacifastacus leniusculus) was a grea ...
A meta-analysis of trait differences between invasive and non
... between invasive and non-invasive species (Rosenberg et al. 2000). A more powerful approach to test for general patterns across multiple studies, which accounts for differences in sample sizes and the magnitude of the differences, is metaanalysis (Hedges & Olkin 1985; Rosenberg et al. 2000). We calc ...
... between invasive and non-invasive species (Rosenberg et al. 2000). A more powerful approach to test for general patterns across multiple studies, which accounts for differences in sample sizes and the magnitude of the differences, is metaanalysis (Hedges & Olkin 1985; Rosenberg et al. 2000). We calc ...
Phylogeographic Analyses and Paleodistribution
... comosum being sister to Hordeum patagonicum and Hordeum pubiflorum (Pleines and Blattner 2008). They originated as part of a rapid radiation of the genus in South America and split within the last 1.3 My (Blattner 2004, 2006). That places their origin within the time of highest glacial maxima in Pat ...
... comosum being sister to Hordeum patagonicum and Hordeum pubiflorum (Pleines and Blattner 2008). They originated as part of a rapid radiation of the genus in South America and split within the last 1.3 My (Blattner 2004, 2006). That places their origin within the time of highest glacial maxima in Pat ...
study regarding the olt river (romania)
... stagnophilous species, which are, therefore, pronouncedly dominant, occasionally tending to proliferate in mass numbers. It is generally recognized that a large amount of fish excrement may significantly enhance eutrophication of ecosystems (Horppila and Kairesalo 1992). The abundance of the ichthyo ...
... stagnophilous species, which are, therefore, pronouncedly dominant, occasionally tending to proliferate in mass numbers. It is generally recognized that a large amount of fish excrement may significantly enhance eutrophication of ecosystems (Horppila and Kairesalo 1992). The abundance of the ichthyo ...
Current distribution of parthenium weed in Kenya and
... Impact of parthenium on human Health • Toxic to humans & animals: dermatitis & respiratory allergies • Human allergy problems identified in Australia, Ethiopia and India • 73% of people living with weed in Australia are sensitive to it (women are twice as sensitive) May lead to massive health ris ...
... Impact of parthenium on human Health • Toxic to humans & animals: dermatitis & respiratory allergies • Human allergy problems identified in Australia, Ethiopia and India • 73% of people living with weed in Australia are sensitive to it (women are twice as sensitive) May lead to massive health ris ...
Tern, roseate - State of New Jersey
... located above the high-tide line, often within vegetated dunes where dense concentrations of beach grasses and seaside goldenrod (Solidago sempervirens) provide cover. In comparison to other terns, roseates nest at sites with more vegetative cover. Infrequently, they may nest in open areas, especial ...
... located above the high-tide line, often within vegetated dunes where dense concentrations of beach grasses and seaside goldenrod (Solidago sempervirens) provide cover. In comparison to other terns, roseates nest at sites with more vegetative cover. Infrequently, they may nest in open areas, especial ...
species complex - University of Oklahoma
... particular, we evaluated the degree to which alleles are common in one group, but are not detected in another group, indicating an absence of gene flow between the groups (Avise & Ball, 1990; Mallet, 1995). This criterion is conservative, especially for geographically overlapping groups, in that it ...
... particular, we evaluated the degree to which alleles are common in one group, but are not detected in another group, indicating an absence of gene flow between the groups (Avise & Ball, 1990; Mallet, 1995). This criterion is conservative, especially for geographically overlapping groups, in that it ...
Invasive lionfish preying on critically endangered reef fish
... The lionfish invasion of the Caribbean cannot be stopped; however, targeted removals have reduced lionfish numbers in many areas (Morris and Whitfield 2009; Albins and Hixon 2013; Côté et al. 2014). To date, these success stories are limited to the most popular dive destinations, and no targeted r ...
... The lionfish invasion of the Caribbean cannot be stopped; however, targeted removals have reduced lionfish numbers in many areas (Morris and Whitfield 2009; Albins and Hixon 2013; Côté et al. 2014). To date, these success stories are limited to the most popular dive destinations, and no targeted r ...
Habitat suitability modelling and niche theory
... 1. The concept of the ecological niche relates a set of environmental variables to the fitness of species, while habitat suitability models (HSMs) relate environmental variables to the likelihood of occurrence of the species. In spite of this relationship, the concepts are weakly linked in the liter ...
... 1. The concept of the ecological niche relates a set of environmental variables to the fitness of species, while habitat suitability models (HSMs) relate environmental variables to the likelihood of occurrence of the species. In spite of this relationship, the concepts are weakly linked in the liter ...
... xerophytic shrubland, and along the margins of canopy dry forest / shrubland. The adults are primarily terrestrial, occupying rock holes and low tree cavities. Younger individuals tend to be more arboreal. Like all Cyclura species the Blue Iguana is primarily herbivorous, consuming leaves, flowers a ...
Population size and the risk of local extinction: empirical evidence
... tion among species in the number of plants necessary in a population to make its survival likely. The population size necessary for 90% probability of survival over 10 years varied from 71 individuals for L. campestre to 1276 for M. arvense (Table 1). In R. serotinus survival probability of a popula ...
... tion among species in the number of plants necessary in a population to make its survival likely. The population size necessary for 90% probability of survival over 10 years varied from 71 individuals for L. campestre to 1276 for M. arvense (Table 1). In R. serotinus survival probability of a popula ...
pptx
... “If some mechanism promotes the coexistence of two or more species, each species must be able to increase when it is rare and the others are at their typical abundances; this invasibility criterion is fundamental evidence for species coexistence regardless of the mechanism.” “some subset of the co-o ...
... “If some mechanism promotes the coexistence of two or more species, each species must be able to increase when it is rare and the others are at their typical abundances; this invasibility criterion is fundamental evidence for species coexistence regardless of the mechanism.” “some subset of the co-o ...
FACTORS AFFECTING IMPLEMENTATION OF RECOVERY PLANS
... prompted by the initial publication of explicit recovery planning guidelines (USFWS 1990). Without data indicating when specific recovery tasks were implemented, these alternative hypotheses cannot be evaluated. We recommend more frequent analysis of the implementation status of tasks, which would p ...
... prompted by the initial publication of explicit recovery planning guidelines (USFWS 1990). Without data indicating when specific recovery tasks were implemented, these alternative hypotheses cannot be evaluated. We recommend more frequent analysis of the implementation status of tasks, which would p ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.