3.4.2.6 Rare Plant Occurrences 3.4.2.6.1 Rare Vascular Plants
... Ecological Community Committee has not yet reviewed extreme rich fens as an addition to the Rare Ecological Communities tracking list. About 12 extreme rich fens have been documented in Alberta, mostly in the foothills in the southern half of the province (Allen 2006, pers. comm.). The larger extrem ...
... Ecological Community Committee has not yet reviewed extreme rich fens as an addition to the Rare Ecological Communities tracking list. About 12 extreme rich fens have been documented in Alberta, mostly in the foothills in the southern half of the province (Allen 2006, pers. comm.). The larger extrem ...
G. Evelyn Hutchinson
... Kind of difference necessary to permit two species to co-occur in different niches but at the same level of a food web ...
... Kind of difference necessary to permit two species to co-occur in different niches but at the same level of a food web ...
What constrains the geographic and host range of the Emily Boone
... green crab, Carcinus maenas, which has had negative impacts upon salt marsh communities in New England, California, Canada, Australia, Tasmania and South Africa (Lafferty and Kuris, 1996). Lafferty and Kuris (1996) suggested that introducing the rhizocephalan, Sacculina carcini, which is a parasitic ...
... green crab, Carcinus maenas, which has had negative impacts upon salt marsh communities in New England, California, Canada, Australia, Tasmania and South Africa (Lafferty and Kuris, 1996). Lafferty and Kuris (1996) suggested that introducing the rhizocephalan, Sacculina carcini, which is a parasitic ...
Türk
... many problems regarding recognition of the species in the past. However, the Palaearctic members of this complex have been revised by Disney, 2006. This species is a new record for the Turkish fauna. Megaselia scalaris (Loew, 1866) Material examined: Adana: Centre, 23 m, August 2007, 13 ♀♀ and 17 ♂♂ ...
... many problems regarding recognition of the species in the past. However, the Palaearctic members of this complex have been revised by Disney, 2006. This species is a new record for the Turkish fauna. Megaselia scalaris (Loew, 1866) Material examined: Adana: Centre, 23 m, August 2007, 13 ♀♀ and 17 ♂♂ ...
Chapter 4
... Invasive species pose new threats to community stability Invasive species = non-native (exotic) organisms that spread widely and become dominant in a community Introduced species = species that were deliberately or accidentally brought from elsewhere Growth-limiting factors (predators, diseas ...
... Invasive species pose new threats to community stability Invasive species = non-native (exotic) organisms that spread widely and become dominant in a community Introduced species = species that were deliberately or accidentally brought from elsewhere Growth-limiting factors (predators, diseas ...
Chapter 4 Notes - Lincoln High School
... Invasive species pose new threats to community stability § Invasive species = non-native (exotic) organisms that spread widely and become dominant in a community § Introduced species = species that were deliberately or accidentally brought from elsewhere § Growth-limiting factors (predators, dis ...
... Invasive species pose new threats to community stability § Invasive species = non-native (exotic) organisms that spread widely and become dominant in a community § Introduced species = species that were deliberately or accidentally brought from elsewhere § Growth-limiting factors (predators, dis ...
Response of endemic and exotic earthworm communities to
... Aporrectodea rosea, Lumbricus terrestris, Lumbricus rubellus and Octolasion cyaneum (Lee 1961; Stockdill 1966; Schon et al. 2008). Introduction of exotic earthworms and their subsequent spread occurred after the di ...
... Aporrectodea rosea, Lumbricus terrestris, Lumbricus rubellus and Octolasion cyaneum (Lee 1961; Stockdill 1966; Schon et al. 2008). Introduction of exotic earthworms and their subsequent spread occurred after the di ...
Living together: behavior and welfare in single and mixed species
... troops was less likely to be affected by the Saimiri’s movements. Terborgh [1983] concluded that the Saimiri benefit from the Cebus’ more detailed knowledge of fruiting trees, as their associations with Cebus increased during periods of resource scarcity, and Cebus led the troop more frequently duri ...
... troops was less likely to be affected by the Saimiri’s movements. Terborgh [1983] concluded that the Saimiri benefit from the Cebus’ more detailed knowledge of fruiting trees, as their associations with Cebus increased during periods of resource scarcity, and Cebus led the troop more frequently duri ...
The logistic model-generated carrying capacities for wild herbivores
... Bleloch, 1986; Anderson, 1991; Caughley and Sinclair, 1994; Njoka and Kinyua, 2006). Conceptually, the term Ki represents the maximum number of animal units of game herbivore species i that can be supported through period t. There are three cases as shown in (Equations 2, 3 and ...
... Bleloch, 1986; Anderson, 1991; Caughley and Sinclair, 1994; Njoka and Kinyua, 2006). Conceptually, the term Ki represents the maximum number of animal units of game herbivore species i that can be supported through period t. There are three cases as shown in (Equations 2, 3 and ...
Tabby Go Home
... cats (Felis catus) worldwide (Jarvis 1990) is especially devastating. Fed and cared for by humans, cats are maintained at numbers up to 100 times or more the typical abundance of wild cats and other mid-sized predators (Churcher and Lawton 1987. Coleman and Temple 1993), These superabundant, exotic ...
... cats (Felis catus) worldwide (Jarvis 1990) is especially devastating. Fed and cared for by humans, cats are maintained at numbers up to 100 times or more the typical abundance of wild cats and other mid-sized predators (Churcher and Lawton 1987. Coleman and Temple 1993), These superabundant, exotic ...
Chapter 12 Natural Environment The State of Our Biodiversity
... The District is typical of the majority of mainland New Zealand in that it has ...
... The District is typical of the majority of mainland New Zealand in that it has ...
INTERIM RECOVERY PLAN NO - Department of Parks and Wildlife
... Current status: Dryandra fuscobractea was declared as Rare Flora under the Western Australian Wildlife Conservation Act 1950 in July 2004 and is currently ranked as Critically Endangered (CR) under World Conservation Union (IUCN 2001) Red List criteria C2a(i); D due to the species being in decline w ...
... Current status: Dryandra fuscobractea was declared as Rare Flora under the Western Australian Wildlife Conservation Act 1950 in July 2004 and is currently ranked as Critically Endangered (CR) under World Conservation Union (IUCN 2001) Red List criteria C2a(i); D due to the species being in decline w ...
01_GR9_UA_BioDiversity - Calgary Catholic Schools
... are subtle variations between the individual members of the population. For example, if you examined a population of magpies very closely, you might notice that bill shape or wingspan varied between individuals. Genetic diversity refers to the variations between members of a population. In any popul ...
... are subtle variations between the individual members of the population. For example, if you examined a population of magpies very closely, you might notice that bill shape or wingspan varied between individuals. Genetic diversity refers to the variations between members of a population. In any popul ...
ktf0482
... April 1986 and February 1987. The Ngomeni mangrove forest has been partly cleared for salt farming and prawn cultivation while the Gazi mangroves are being exploited for wood both for building and fuel. These forests are the tyPes referred to as creek mangroves (Macnae, 1968). They are well develope ...
... April 1986 and February 1987. The Ngomeni mangrove forest has been partly cleared for salt farming and prawn cultivation while the Gazi mangroves are being exploited for wood both for building and fuel. These forests are the tyPes referred to as creek mangroves (Macnae, 1968). They are well develope ...
Facilitation contributes to Mediterranean woody plant diversity but
... recent studies that examined the contribution of facilitation to the macroecological patterns of species diversity (e.g. Cavieres et al., 2014) but did not explicitly address such hypotheses, we tested both hypotheses and examined whether the stress gradient and the plant–plant interaction balance h ...
... recent studies that examined the contribution of facilitation to the macroecological patterns of species diversity (e.g. Cavieres et al., 2014) but did not explicitly address such hypotheses, we tested both hypotheses and examined whether the stress gradient and the plant–plant interaction balance h ...
Biological diversity, ecosystem stability and economic
... should be high. For the most part, these costs are currently too low (see Pearce and Warford, 1993). The second problem is that, even if natural resources were priced appropriately, the cost of their use is discounted into the future at far too high a rate. Because biogeochemical processes, such as ...
... should be high. For the most part, these costs are currently too low (see Pearce and Warford, 1993). The second problem is that, even if natural resources were priced appropriately, the cost of their use is discounted into the future at far too high a rate. Because biogeochemical processes, such as ...
Microbial interactions: from networks to models
... The extent to which ecological interactions between species shape their abundances remains the subject of debate. In his seminal paper on the distribution of bird species across tropical islands, Jared Diamond102 derived community assembly rules from the birds’ presence–absence patterns. In brief, h ...
... The extent to which ecological interactions between species shape their abundances remains the subject of debate. In his seminal paper on the distribution of bird species across tropical islands, Jared Diamond102 derived community assembly rules from the birds’ presence–absence patterns. In brief, h ...
Legume species identity and soil nitrogen supply elevated atmospheric [CO
... as [CO2]-induced stimulation of N fixation (Hungate et al., 1999; Feng et al., 2004). In addition to its direct effect on legume productivity, this response might have implications for other species, as legumes could, in turn, enhance the responses of co-occurring species to elevated [CO2] by increa ...
... as [CO2]-induced stimulation of N fixation (Hungate et al., 1999; Feng et al., 2004). In addition to its direct effect on legume productivity, this response might have implications for other species, as legumes could, in turn, enhance the responses of co-occurring species to elevated [CO2] by increa ...
Plants & Ecology Range margins and refugia Johan Dahlberg
... Second, already Darwin (1859) noticed that competitors may limit the range of species. Connor and Bowers (1987) stated that interspecific competition plays an important role in species distribution across different spatial scales. In fruitfly experiments it has been shown that interspecific competit ...
... Second, already Darwin (1859) noticed that competitors may limit the range of species. Connor and Bowers (1987) stated that interspecific competition plays an important role in species distribution across different spatial scales. In fruitfly experiments it has been shown that interspecific competit ...
Wooded habitat edges as refugia from microtine herbivory in
... forb native to Eurasia. Black medic has been shown to be palatable to voles in previous trials (Danielson, unpubl.), so it could be used to indicate the relative palatability of native species. The placement of eight seedlings of each species into a 4 × 4 tray was randomized by a latin square design ...
... forb native to Eurasia. Black medic has been shown to be palatable to voles in previous trials (Danielson, unpubl.), so it could be used to indicate the relative palatability of native species. The placement of eight seedlings of each species into a 4 × 4 tray was randomized by a latin square design ...
Potential value of indicator species for conservation
... The value of the worlds biological resources has been estimated at about 33 trillion dollars, or twice the worlds total annual GNP (Costanza et al. 1997). However the true value is infinite, as human society cannot exist without them. All these resources are now managed in the sense that all ecos ...
... The value of the worlds biological resources has been estimated at about 33 trillion dollars, or twice the worlds total annual GNP (Costanza et al. 1997). However the true value is infinite, as human society cannot exist without them. All these resources are now managed in the sense that all ecos ...
Food web structure affects the extinction risk of species in ecological
... Here we argue that extinction risk of a particular species not only depends on characteristics of that species (such as body size, generation time or dispersal ability), but also on interactions with and characteristics of other species (Ives and Cardinale, 2004). The reason for this is that the sen ...
... Here we argue that extinction risk of a particular species not only depends on characteristics of that species (such as body size, generation time or dispersal ability), but also on interactions with and characteristics of other species (Ives and Cardinale, 2004). The reason for this is that the sen ...
Leaf trait variation captures climate differences but differs with
... plant functional classification (Diaz and Cabido 1997; Gitay and Noble 1997; Lavorel et al. 1997). In this study, we measured several leaf functional traits that characterize leaf structure properties and leaf chemical components (Cornelissen et al. 2003) for 92 woody plant species cultivated in the ...
... plant functional classification (Diaz and Cabido 1997; Gitay and Noble 1997; Lavorel et al. 1997). In this study, we measured several leaf functional traits that characterize leaf structure properties and leaf chemical components (Cornelissen et al. 2003) for 92 woody plant species cultivated in the ...
Species Selection: Theory and Data
... one or more clades with that trait. Mammalian body size is often viewed in this light: Species tend to exhibit modal sizes, and a cross-level discordance may exist in the evolutionary consequences of size in that short-term organismic selection might often favor larger body size (cf. Kingsolver & Pf ...
... one or more clades with that trait. Mammalian body size is often viewed in this light: Species tend to exhibit modal sizes, and a cross-level discordance may exist in the evolutionary consequences of size in that short-term organismic selection might often favor larger body size (cf. Kingsolver & Pf ...
Microbial interactions: from networks to models
... The extent to which ecological interactions between species shape their abundances remains the subject of debate. In his seminal paper on the distribution of bird species across tropical islands, Jared Diamond102 derived community assembly rules from the birds’ presence–absence patterns. In brief, h ...
... The extent to which ecological interactions between species shape their abundances remains the subject of debate. In his seminal paper on the distribution of bird species across tropical islands, Jared Diamond102 derived community assembly rules from the birds’ presence–absence patterns. In brief, h ...
Introduced species
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.