![The number of competitor species is unlinked to sexual dimorphism](http://s1.studyres.com/store/data/017432706_1-a3907426893f8e8f58b50ce57e94ef48-300x300.png)
The number of competitor species is unlinked to sexual dimorphism
... ecological theory, following innovative 1930s laboratory experiments with two species of protists (Gause 1934), still often postulates that species that are too similar in their ecological requirements cannot coexist. Such species can either diverge (often, in size), or the lesser competitor is driv ...
... ecological theory, following innovative 1930s laboratory experiments with two species of protists (Gause 1934), still often postulates that species that are too similar in their ecological requirements cannot coexist. Such species can either diverge (often, in size), or the lesser competitor is driv ...
Thresholds of Potential Concern - Learning Center of the American
... arbitrary levels based on the best available information (Whyte et al. 1999). In some cases, there was insufficient information to have a clear vision of what level of elephantinduced change is acceptable (Whyte et al. 2003). Thus, is fully anticipated that TPCs will be revised and refined as ...
... arbitrary levels based on the best available information (Whyte et al. 1999). In some cases, there was insufficient information to have a clear vision of what level of elephantinduced change is acceptable (Whyte et al. 2003). Thus, is fully anticipated that TPCs will be revised and refined as ...
The Vegetation Communities Modified land
... and exotic vegetation was subject to a minor revision in 2015. The aim of this revision was to clarify the intention of the mapping unit Permanent easements (FPE). FPE was modified to restrict its use to native vegetation, rather than to include areas of infrastructure without substantial native veg ...
... and exotic vegetation was subject to a minor revision in 2015. The aim of this revision was to clarify the intention of the mapping unit Permanent easements (FPE). FPE was modified to restrict its use to native vegetation, rather than to include areas of infrastructure without substantial native veg ...
Community Patterns in Source
... each species was the best competitor in one community and the distribution of parameters corresponded to a deviation of 5% from the strict similarity case. Local basic reproductive rates ranged from 0.16 to 24. The extinction threshold was fixed at 0.001. The species rank abundance distributions wer ...
... each species was the best competitor in one community and the distribution of parameters corresponded to a deviation of 5% from the strict similarity case. Local basic reproductive rates ranged from 0.16 to 24. The extinction threshold was fixed at 0.001. The species rank abundance distributions wer ...
The difference between the Greater and Lesser Antilles can be
... and the other two cases are ambiguous—character displacement can’t be ruled out, but is not definitively supported, either. Although the overall support for character displacement is not overwhelming, it has not been disproven. This is important to keep in mind, because phylogenetic examination coul ...
... and the other two cases are ambiguous—character displacement can’t be ruled out, but is not definitively supported, either. Although the overall support for character displacement is not overwhelming, it has not been disproven. This is important to keep in mind, because phylogenetic examination coul ...
Fundamental and realized niches of two chrysomelid
... (Reitz and trumble, 2002; Arthur 1991). For example, the Lantana hispid Uroplata girardi Pic (Coleoptera: Chrysomelidae) and the leaf mining fly Ophiomyia camarae Spencer (Dipetera: Agromyzidae), were released as bio-control agents against the weed Lantana camara L. (Verbenaceae) in South Africa in ...
... (Reitz and trumble, 2002; Arthur 1991). For example, the Lantana hispid Uroplata girardi Pic (Coleoptera: Chrysomelidae) and the leaf mining fly Ophiomyia camarae Spencer (Dipetera: Agromyzidae), were released as bio-control agents against the weed Lantana camara L. (Verbenaceae) in South Africa in ...
Seed Dispersal and Spatial Pattern in Tropical Trees
... size r (Figure 2). Figure 3 additionally reveals that smallscale aggregation (d 75 m) is more strongly correlated with dispersal syndrome than large-scale aggregation. At very large spatial scales (d 200 m), spatial patterns are no longer correlated with dispersal syndromes. This result suggests ...
... size r (Figure 2). Figure 3 additionally reveals that smallscale aggregation (d 75 m) is more strongly correlated with dispersal syndrome than large-scale aggregation. At very large spatial scales (d 200 m), spatial patterns are no longer correlated with dispersal syndromes. This result suggests ...
NFMV Giant Invasive Iguana Position Statement_May 2015
... national governments fully realised the problem and began to take action, by which time it was too late to effect eradication. C. In Florida and islands of the Caribbean such as Puerto Rico, Grand Cayman where the iguana has been established for 30 or more years, its negative impacts are well known ...
... national governments fully realised the problem and began to take action, by which time it was too late to effect eradication. C. In Florida and islands of the Caribbean such as Puerto Rico, Grand Cayman where the iguana has been established for 30 or more years, its negative impacts are well known ...
Ecological Risk Assessment of Genetically Modified Higher Plants
... In ecological risk assessment of transgenic plants, information on a wide range of subjects is needed for an effective and reliable assessment procedure. The information obtained from literature, field trials, laboratory and greenhouse tests have to be interpreted in a structured and well-defined ma ...
... In ecological risk assessment of transgenic plants, information on a wide range of subjects is needed for an effective and reliable assessment procedure. The information obtained from literature, field trials, laboratory and greenhouse tests have to be interpreted in a structured and well-defined ma ...
Plant Species Diversity and Management of Temperate Forage and
... The weedy species in the recent survey are more typical of higher soil fertility conditions. The data indicated that changes in grazing land management including new forage species and cultivars along with improvements in soil fertility management likely contributed to the changes in botanical compo ...
... The weedy species in the recent survey are more typical of higher soil fertility conditions. The data indicated that changes in grazing land management including new forage species and cultivars along with improvements in soil fertility management likely contributed to the changes in botanical compo ...
Do climatically similar regions contain similar alien floras?
... similar climates have similar alien floras has seldom been tested using comparable data sets, and within-region variation has often been ignored (Pauchard et al., 2004a). The mediterranean-type climate areas of California and central Chile represent particularly interesting systems for testing a com ...
... similar climates have similar alien floras has seldom been tested using comparable data sets, and within-region variation has often been ignored (Pauchard et al., 2004a). The mediterranean-type climate areas of California and central Chile represent particularly interesting systems for testing a com ...
managing fisheries effects on marine food webs
... CEMP was initiated in 1986 to detect significant changes to the ecosystem, particularly in predators of krill, and to signal when such changes were the consequences of fishing. The CEMP is intended, in this way, to inform the commission when fishing affects species dependent on the target species. CEMP ...
... CEMP was initiated in 1986 to detect significant changes to the ecosystem, particularly in predators of krill, and to signal when such changes were the consequences of fishing. The CEMP is intended, in this way, to inform the commission when fishing affects species dependent on the target species. CEMP ...
Integrated Ecological- Economic Models
... (e) climate change. Habitat change follows from humans transforming 50% of Earth’s icefree land surface to agricultural and urban usage (Chapin et al. 2000), appropriating 54% of the available fresh water (Postel et al. 1996) and 40% of vegetation’s net primary production (Vitousek et al. 1986). The ...
... (e) climate change. Habitat change follows from humans transforming 50% of Earth’s icefree land surface to agricultural and urban usage (Chapin et al. 2000), appropriating 54% of the available fresh water (Postel et al. 1996) and 40% of vegetation’s net primary production (Vitousek et al. 1986). The ...
Responses of insect pests, pathogens, and invasive plant species to
... In northeastern North America, forests host a variety of native and introduced insect pests, invasive plant species, and pathogens (which we collectively term ‘‘nuisance species’’) that currently affect forest structure and function. While these species differ widely in their natural history and eco ...
... In northeastern North America, forests host a variety of native and introduced insect pests, invasive plant species, and pathogens (which we collectively term ‘‘nuisance species’’) that currently affect forest structure and function. While these species differ widely in their natural history and eco ...
Pumpkinseed (Lepomis gibbosus)
... Yes. One likely form of harm could come in the form of ecological damage to other biota through either direct predation, or through cascading indirect effects through different trophic levels. For example, in other countries, including its native range, it has been demonstrated that abundance of L. ...
... Yes. One likely form of harm could come in the form of ecological damage to other biota through either direct predation, or through cascading indirect effects through different trophic levels. For example, in other countries, including its native range, it has been demonstrated that abundance of L. ...
When everything is not everywhere but species evolve - CERES
... approach by definition is not appropriate to simulate the process of trait loss. In order to predict properly what the adaptive responses of marine systems would be, it is important to investigate this potential effect. Also, the everything-is-everywhere approach is not particularly economical in te ...
... approach by definition is not appropriate to simulate the process of trait loss. In order to predict properly what the adaptive responses of marine systems would be, it is important to investigate this potential effect. Also, the everything-is-everywhere approach is not particularly economical in te ...
Effects of prescribed fall burning on a wetland plant community, with
... and indirect effects of management activities by designing appropriate monitoring programs and sound analysis methods. Here we evaluate the effects of prescribed fall burning on a wetland plant community that is managed primarily for spring-migrating geese. During late fall in 2 consecutive years, w ...
... and indirect effects of management activities by designing appropriate monitoring programs and sound analysis methods. Here we evaluate the effects of prescribed fall burning on a wetland plant community that is managed primarily for spring-migrating geese. During late fall in 2 consecutive years, w ...
Ecology and conservation of small carnivores in tropical rainforests
... Food habits of the brown palm civet were studied using scat analysis, a technique widely used to study small carnivore diet [2, 5-6, 11, 18-19, 31-33]. As the brown palm civet is strictly nocturnal and inhabits rainforest with a dense canopy cover and understory, direct observations of feeding or ca ...
... Food habits of the brown palm civet were studied using scat analysis, a technique widely used to study small carnivore diet [2, 5-6, 11, 18-19, 31-33]. As the brown palm civet is strictly nocturnal and inhabits rainforest with a dense canopy cover and understory, direct observations of feeding or ca ...
CP EIR 01 - City of Redwood City
... Redwood City (City). Redwood Creek flows through a culvert under U.S. 101 and enters the Bay between Bair and Greco Islands. Stulsaft Branch and Jefferson Branch are labeled „Arroyo Ojo‟ on the USGS 7.5 minute topographic map but are known in the City as Stulsaft and Jefferson branches. Redwood Cree ...
... Redwood City (City). Redwood Creek flows through a culvert under U.S. 101 and enters the Bay between Bair and Greco Islands. Stulsaft Branch and Jefferson Branch are labeled „Arroyo Ojo‟ on the USGS 7.5 minute topographic map but are known in the City as Stulsaft and Jefferson branches. Redwood Cree ...
A Ravine`s Web of Life - Park District of Highland Park
... other organisms they are connected to (i.e., their food web connections). Some students may not receive the ball of yarn. 10. Ask a student to roll up the yarn, hand it to the student with The Sun, and start again. After a couple minutes, remove a primary consumer from the food web by asking him or ...
... other organisms they are connected to (i.e., their food web connections). Some students may not receive the ball of yarn. 10. Ask a student to roll up the yarn, hand it to the student with The Sun, and start again. After a couple minutes, remove a primary consumer from the food web by asking him or ...
Biodiversity in grasslands: current changes and scenarios for the
... l extraction of resources (e.g. mineral nutrients); l changes in energy and material transfers (e.g. individual plant growth and nutrient mineralization); l changes in species composition (e.g. addition of crops and weeds) and substances (i.e. agrochemicals, principally pesticides and fertilizers); ...
... l extraction of resources (e.g. mineral nutrients); l changes in energy and material transfers (e.g. individual plant growth and nutrient mineralization); l changes in species composition (e.g. addition of crops and weeds) and substances (i.e. agrochemicals, principally pesticides and fertilizers); ...
Patterns in the structure of Asian and North American desert small
... and high mountain ranges (e.g. the Altay and Sayan Mountains), are physiognomically and climatically very different (Walter & Box, 1983), remain relatively little studied (relative to North American deserts; e.g. Genoways & Brown, 1993), and exhibit substantial faunal differences above the level of ...
... and high mountain ranges (e.g. the Altay and Sayan Mountains), are physiognomically and climatically very different (Walter & Box, 1983), remain relatively little studied (relative to North American deserts; e.g. Genoways & Brown, 1993), and exhibit substantial faunal differences above the level of ...
Progress toward understanding the ecological impacts of nonnative
... ecological impacts is a key challenge for invasion ecology. The complexity and idiosyncrasy of impact is now well recognized. Studies have revealed that community- and ecosystem-level impacts are driven by myriad indirect, often subtle, sometimes cascading effects (Jones et al. 1998, White et al. 20 ...
... ecological impacts is a key challenge for invasion ecology. The complexity and idiosyncrasy of impact is now well recognized. Studies have revealed that community- and ecosystem-level impacts are driven by myriad indirect, often subtle, sometimes cascading effects (Jones et al. 1998, White et al. 20 ...
Species-Area Relationship for Stream Fishes
... a stream may be viewed conceptually as an archipelago, albeit with two important differences from true islands. First, single patches of habitat are generally too small to support self-sustaining populations of fish. In this regard, stream habitats are analogous to small woodlots for bird population ...
... a stream may be viewed conceptually as an archipelago, albeit with two important differences from true islands. First, single patches of habitat are generally too small to support self-sustaining populations of fish. In this regard, stream habitats are analogous to small woodlots for bird population ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
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.