Ecological niche - Biomathematics and Statistics Scotland
... favourable conditions determined by all environmental (abiotic and biotic) variables where the species can reproduce and survive, and the realized niche, which is a subset of the abstract fundamental niche, where the species can persist given the presence of other species competing for the same reso ...
... favourable conditions determined by all environmental (abiotic and biotic) variables where the species can reproduce and survive, and the realized niche, which is a subset of the abstract fundamental niche, where the species can persist given the presence of other species competing for the same reso ...
Full text in pdf format
... ABSTRACT: The subtidal macrobenthic community of a temperate beach in southern Portugal was studied along a depth gradient (1.3 to 32 m deep), which was long enough to comprise both highly hydrodynamic and calmer areas, to assess the influence of the spatial and temporal differences in hydrodynamic ...
... ABSTRACT: The subtidal macrobenthic community of a temperate beach in southern Portugal was studied along a depth gradient (1.3 to 32 m deep), which was long enough to comprise both highly hydrodynamic and calmer areas, to assess the influence of the spatial and temporal differences in hydrodynamic ...
Are introduced rats (Rattus rattus) both seed predators and
... widespread and problematic invasive mammals affecting islands (Lowe et al. 2000; Drake and Hunt 2009; Traveset et al. 2009). Through mostly unintentional introductions by humans, these rodents occupy > 80% of the major islands worldwide (Atkinson 1985; Towns 2009). As a consequence of their omnivoro ...
... widespread and problematic invasive mammals affecting islands (Lowe et al. 2000; Drake and Hunt 2009; Traveset et al. 2009). Through mostly unintentional introductions by humans, these rodents occupy > 80% of the major islands worldwide (Atkinson 1985; Towns 2009). As a consequence of their omnivoro ...
The Influence of Predator-Prey Population Dynamics on the Long
... can be compared with the evidence from the fossil record. There has been considerable interest in macro-evolutionary models recently, generated by the claim that extinction dynamics are related to the concept of self-organised criticality (Bak & Sneppen, 1993; Solé et al. 1996; ...
... can be compared with the evidence from the fossil record. There has been considerable interest in macro-evolutionary models recently, generated by the claim that extinction dynamics are related to the concept of self-organised criticality (Bak & Sneppen, 1993; Solé et al. 1996; ...
as a PDF
... 2 Our goals were to examine plant strategy theory, using grass species that differed widely in various traits and in their response to environmental influences. More specifically, we wished to examine whether the importance of competition was less in low fertility or regularly disturbed environments ...
... 2 Our goals were to examine plant strategy theory, using grass species that differed widely in various traits and in their response to environmental influences. More specifically, we wished to examine whether the importance of competition was less in low fertility or regularly disturbed environments ...
building a regional species pool: diversification of the
... diversity and the diversification rates for the two clades are quite different. One clade has its center of diversity in New England and radiated very recently from three species to give the current 18. Although most of this radiation involved the creation of new species in the ancestral fish-lake h ...
... diversity and the diversification rates for the two clades are quite different. One clade has its center of diversity in New England and radiated very recently from three species to give the current 18. Although most of this radiation involved the creation of new species in the ancestral fish-lake h ...
Los Angeles Mission College Facilities Master Plan 3.3 B R
... Recently, the USFWS instituted changes in the listing status of former candidate species. Former C1 (candidate) species are now referred to simply as candidate species and represent the only candidates for listing. Former C2 species (for which the USFWS had insufficient evidence to warrant listing a ...
... Recently, the USFWS instituted changes in the listing status of former candidate species. Former C1 (candidate) species are now referred to simply as candidate species and represent the only candidates for listing. Former C2 species (for which the USFWS had insufficient evidence to warrant listing a ...
Species Richness and the Temporal Stability of Biomass Production
... same article or sequence of related articles. For example, the European BioDEPTH project represents several independent manipulations of plant species richness performed in different countries, yet these independent experiments were often reported together as a single study (e.g., Hector et al. 2010 ...
... same article or sequence of related articles. For example, the European BioDEPTH project represents several independent manipulations of plant species richness performed in different countries, yet these independent experiments were often reported together as a single study (e.g., Hector et al. 2010 ...
- New Zealand Ecological Society
... Abstract: In 2003, a review of how introduced mammals were managed as pests in New Zealand was published. Since then trends for the control of these mammals include moves from pest-by-pest prioritisation towards site-based and multiple-pest management, extension of large-scale aerial control of pred ...
... Abstract: In 2003, a review of how introduced mammals were managed as pests in New Zealand was published. Since then trends for the control of these mammals include moves from pest-by-pest prioritisation towards site-based and multiple-pest management, extension of large-scale aerial control of pred ...
Species mtDNA genetic diversity explained by infrapopulation size
... In order to use all mtDNA sequences available, and to take into account uncertainty on the estimated infrapopulation sizes, we tested the relationship between species infrapopulation size and genetic diversity by running 100 Generalized Linear Models (GLMs). For each run, we recalculated species gen ...
... In order to use all mtDNA sequences available, and to take into account uncertainty on the estimated infrapopulation sizes, we tested the relationship between species infrapopulation size and genetic diversity by running 100 Generalized Linear Models (GLMs). For each run, we recalculated species gen ...
Threatened Species - Environment, Planning and Sustainable
... short-term a public awareness campaign will be developed to inform residents who live closest or adjacent to Delma impar habitats, of ways in which these potential threats can be reduced. A number of small isolated sub-populations are known to exist in various sites in the ACT. The long-term viabili ...
... short-term a public awareness campaign will be developed to inform residents who live closest or adjacent to Delma impar habitats, of ways in which these potential threats can be reduced. A number of small isolated sub-populations are known to exist in various sites in the ACT. The long-term viabili ...
Evidence for the Role of Infectious Disease in Species Extinction
... List reports more than 38,000 plants and animals whose status is categorized based on a defined set of criteria as extinct, extinct in the wild, critically endangered, endangered, vulnerable, lower risk, near threatened, data deficient, or of least concern (IUCN 2004). The database is a searchable c ...
... List reports more than 38,000 plants and animals whose status is categorized based on a defined set of criteria as extinct, extinct in the wild, critically endangered, endangered, vulnerable, lower risk, near threatened, data deficient, or of least concern (IUCN 2004). The database is a searchable c ...
Diet and seasonal dispersal of extralimital giraffe at Sanbona
... code with your smart phone or mobile device to read online. ...
... code with your smart phone or mobile device to read online. ...
Distribution pattern of the green alga Codium fragile (Suringar
... and Supsom), Codium plays a subordinate role as member of the understory assemblage below the dominant canopy species. In disturbed habitats, where several native algal species such as Sargassum spp. and Ecklonia have been harvested for food, the activity creates large areas of unoccupied habitat wh ...
... and Supsom), Codium plays a subordinate role as member of the understory assemblage below the dominant canopy species. In disturbed habitats, where several native algal species such as Sargassum spp. and Ecklonia have been harvested for food, the activity creates large areas of unoccupied habitat wh ...
Why are there so many species in the tropics?
... higher rates of speciation than extinction generate high diversity of species and clades within the tropics; (3) most species and clades of tropical origin remain confined to low latitudes, because abiotic environmental constraints inhibit colonization and range expansion out of the tropics; (4) a m ...
... higher rates of speciation than extinction generate high diversity of species and clades within the tropics; (3) most species and clades of tropical origin remain confined to low latitudes, because abiotic environmental constraints inhibit colonization and range expansion out of the tropics; (4) a m ...
Agriculture, Ecosystems and Environment The
... at one level, while at another biodiversity can be considered synonymous with ecosystem services such that having one necessarily entails having the other (Mace et al., 2012). In addition, as managers increase efforts to manage ecosystems to provide multiple valued services, new complexities are ari ...
... at one level, while at another biodiversity can be considered synonymous with ecosystem services such that having one necessarily entails having the other (Mace et al., 2012). In addition, as managers increase efforts to manage ecosystems to provide multiple valued services, new complexities are ari ...
Selecting umbrella species for conservation
... (i.e., be the most effective and efficient candidate for an umbrella species) by quantifying both the degree of spatial co-occurrence, as well as the niche overlap among each potential umbrella and the residual target species group. Along the U.S. Atlantic Coast, several beach-nesting bird species ar ...
... (i.e., be the most effective and efficient candidate for an umbrella species) by quantifying both the degree of spatial co-occurrence, as well as the niche overlap among each potential umbrella and the residual target species group. Along the U.S. Atlantic Coast, several beach-nesting bird species ar ...
Grassland root communities: species distributions and how they are
... samples, and 13 of those 15 species occurred aboveground within the quadrats sampled for shoot biomass (Appendix B). Roots of the remaining two species presumably grew from stems located outside the quadrats. The frequency that species were present in root samples across all depth intervals (0–40 cm ...
... samples, and 13 of those 15 species occurred aboveground within the quadrats sampled for shoot biomass (Appendix B). Roots of the remaining two species presumably grew from stems located outside the quadrats. The frequency that species were present in root samples across all depth intervals (0–40 cm ...
Measuring the diversity of what? And for what purpose?
... It can be interpreted as an effective species number in the sense that 1/p1 gives the equivalent number of equally abundant (hypothetical) species with the same relative abundance as the most abundant species in the community. If, for example, in a community of n = 5 different species the most commo ...
... It can be interpreted as an effective species number in the sense that 1/p1 gives the equivalent number of equally abundant (hypothetical) species with the same relative abundance as the most abundant species in the community. If, for example, in a community of n = 5 different species the most commo ...
Connections between ecology, biogeography, and paleobiology
... Many of the bivalves were still articulated, but they had been washed out of their living positions and collected in one very dense layer on the shore. This deposit is very similar in age to the preceding layer, but reflects a much larger area of sampling - probably at least 10 km 2. This is indicat ...
... Many of the bivalves were still articulated, but they had been washed out of their living positions and collected in one very dense layer on the shore. This deposit is very similar in age to the preceding layer, but reflects a much larger area of sampling - probably at least 10 km 2. This is indicat ...
Riparian Area Health
... How do weeds and waste affect riparian area health? What can I do to help? ...
... How do weeds and waste affect riparian area health? What can I do to help? ...
This article discusses the various hypotheses proposed to explain
... greatest when the disturbance is intermediate. Most of the studies discussed thus far have been closely if not directly related to Connell’s classic paper and have served as supplements to his original conclusion, but there have also been studies which follow from Connell’s paper yet deviate from hi ...
... greatest when the disturbance is intermediate. Most of the studies discussed thus far have been closely if not directly related to Connell’s classic paper and have served as supplements to his original conclusion, but there have also been studies which follow from Connell’s paper yet deviate from hi ...
redroot pigweed Amaranthus retroflexus L.
... across snow during winter. Seeds float and can be dispersed in runoff and other moving water. Birds and small mammals commonly consume the seeds; seeds can survive ingestion and are dispersed in excrement (Costea et al. 2004). Potential to be spread by human activity: Seeds can be dispersed by farm ...
... across snow during winter. Seeds float and can be dispersed in runoff and other moving water. Birds and small mammals commonly consume the seeds; seeds can survive ingestion and are dispersed in excrement (Costea et al. 2004). Potential to be spread by human activity: Seeds can be dispersed by farm ...
Effects of River Impoundment on Ecosystem Services
... High-value migratory species that dominated the fishery before the impoundment was built constituted a minor component of the contemporary fishery that is based heavily on reservoir-adapted introduced species. Cascading effects of river impoundment resulted in a mismatch between embodied energy and ...
... High-value migratory species that dominated the fishery before the impoundment was built constituted a minor component of the contemporary fishery that is based heavily on reservoir-adapted introduced species. Cascading effects of river impoundment resulted in a mismatch between embodied energy and ...
Wildlife Module - Forests Ontario
... by humans for food or bait. Only animals native to the country are usually considered wildlife and domesticated animals that have become wild, or feral, are usually not included. The term wildlife is arbitrary depending upon who is using it. Today most government wildlife management agencies in Cana ...
... by humans for food or bait. Only animals native to the country are usually considered wildlife and domesticated animals that have become wild, or feral, are usually not included. The term wildlife is arbitrary depending upon who is using it. Today most government wildlife management agencies in Cana ...
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.