Coexistence and relative abundance in annual plant assemblages
... Leishman 2001; see Leishman 2001 for review). This relationship has been quantified in recent analyses of Goldberg’s and Landa’s (1991) experiments, where species with different seed sizes were grown in competition with one another (fig. 1B; Freckleton and Watkinson 2001). Specifically, these studie ...
... Leishman 2001; see Leishman 2001 for review). This relationship has been quantified in recent analyses of Goldberg’s and Landa’s (1991) experiments, where species with different seed sizes were grown in competition with one another (fig. 1B; Freckleton and Watkinson 2001). Specifically, these studie ...
Habitat diversity and species diversity: testing the
... occupy deep low-velocity pools, shallow high-velocity riffles, and intermediate habitats, respectively. I introduced two (coho and steelhead) and three species communities into each of three artificial stream habitats: pools, riffles, and diverse. The results provide partial support for the predicti ...
... occupy deep low-velocity pools, shallow high-velocity riffles, and intermediate habitats, respectively. I introduced two (coho and steelhead) and three species communities into each of three artificial stream habitats: pools, riffles, and diverse. The results provide partial support for the predicti ...
station #1 - Scioly.org
... damage shown in the image. [1] 2. Provide the common name for INVASIVE SPECIES #15 that caused the damage shown in the image. [1] 3. In direct response to INVASIVE SPECIES #15, New York State recently updated its regulations to respond to this threat. These regulations are found in NYSDEC Section 19 ...
... damage shown in the image. [1] 2. Provide the common name for INVASIVE SPECIES #15 that caused the damage shown in the image. [1] 3. In direct response to INVASIVE SPECIES #15, New York State recently updated its regulations to respond to this threat. These regulations are found in NYSDEC Section 19 ...
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 ...
The influence of interspecific interactions on species range
... Fisher–Skellam reaction–diffusion model in a number of different ways, with implications for our understanding of interspecific effects on range expansion rates. One basic direction is to allow each of several species to simultaneously disperse and interact, with coupling both via local growth rates ...
... Fisher–Skellam reaction–diffusion model in a number of different ways, with implications for our understanding of interspecific effects on range expansion rates. One basic direction is to allow each of several species to simultaneously disperse and interact, with coupling both via local growth rates ...
1 Optimal Public Control of Exotic Species: Preventing the Brown
... a first step in understanding the mechanics of these interrelated processes, we describe the conditions that would create cycles and then focus more precise analytical attention on the case where failed prevention leads to an ineradicable invasive population. Though this model will take as given the ...
... a first step in understanding the mechanics of these interrelated processes, we describe the conditions that would create cycles and then focus more precise analytical attention on the case where failed prevention leads to an ineradicable invasive population. Though this model will take as given the ...
Review of harvest incentives to control invasive species
... benefit on the ecosystem. These benefits may include a reduction in negative impacts from a reduced average size, although the extent of such benefits will depend on the impacts caused by other members of the population. Challenges associated with harvesting also extend to plants as collection techn ...
... benefit on the ecosystem. These benefits may include a reduction in negative impacts from a reduced average size, although the extent of such benefits will depend on the impacts caused by other members of the population. Challenges associated with harvesting also extend to plants as collection techn ...
THE POPULATION BIOLOGY OF INVASIVE SPECIES Ann K. Sakai
... congeners might elucidate the importance of phenotypic plasticity and genetic variation in the colonization by invasive species. After initial successful colonization, the next stage of invasion is characterized by establishment of a viable, self-sustaining population. There may be little correlatio ...
... congeners might elucidate the importance of phenotypic plasticity and genetic variation in the colonization by invasive species. After initial successful colonization, the next stage of invasion is characterized by establishment of a viable, self-sustaining population. There may be little correlatio ...
Using Network Analysis to infer impact of climate change on
... (Thomson 2005), and time implies long-term climatic stability which has been absent ...
... (Thomson 2005), and time implies long-term climatic stability which has been absent ...
Habitat suitability modelling and niche theory
... occurrence of the species. In spite of this relationship, the concepts are weakly linked in the literature, and there is a strong need for better integration. 2. We selectively reviewed the literature for habitat suitability studies that directly addressed four common facets of niche theory: niche c ...
... occurrence of the species. In spite of this relationship, the concepts are weakly linked in the literature, and there is a strong need for better integration. 2. We selectively reviewed the literature for habitat suitability studies that directly addressed four common facets of niche theory: niche c ...
The Population Biology of Invasive Species Ann K. Sakai
... secondary spread into new habitats. During all stages, there is great potential for genetic changes to occur through drift or selection. In the following sections, we discuss factors related to these stages and identify areas for further exploration. Introduction of exotic species. Most long-distanc ...
... secondary spread into new habitats. During all stages, there is great potential for genetic changes to occur through drift or selection. In the following sections, we discuss factors related to these stages and identify areas for further exploration. Introduction of exotic species. Most long-distanc ...
Dispersal Rates Affect Species Composition in Metacommunities of
... most of the species was lowest when there was no dispersal among local communities (table 1; fig. 2D); the probability of local extinction is likely to be highest when local abundances are low. These patterns reflect those seen in closed and linked communities in other systems (Huffaker 1958; Shorro ...
... most of the species was lowest when there was no dispersal among local communities (table 1; fig. 2D); the probability of local extinction is likely to be highest when local abundances are low. These patterns reflect those seen in closed and linked communities in other systems (Huffaker 1958; Shorro ...
1 - Shepway District Council
... 1.1. My name is Richard Moyse. I am the Head of Conservation and Policy for the Kent Wildlife Trust (KWT). I am appearing on behalf of KWT at this inquiry. 1.2. I was awarded an honours degree in Botany by the University of Wales in 1984 and have subsequently acquired 26 years professional experienc ...
... 1.1. My name is Richard Moyse. I am the Head of Conservation and Policy for the Kent Wildlife Trust (KWT). I am appearing on behalf of KWT at this inquiry. 1.2. I was awarded an honours degree in Botany by the University of Wales in 1984 and have subsequently acquired 26 years professional experienc ...
Global ecological impacts of invasive species in aquatic ecosystems
... propagate along the food web triggering trophic cascades (Moyle & Light, 1996; Strayer, 2010). Impacts can be caused by direct biotic interaction with the resident community (e.g. competition, predation) and also by indirect changes in habitat conditions (e.g. turbidity, habitat structure) (Crooks, ...
... propagate along the food web triggering trophic cascades (Moyle & Light, 1996; Strayer, 2010). Impacts can be caused by direct biotic interaction with the resident community (e.g. competition, predation) and also by indirect changes in habitat conditions (e.g. turbidity, habitat structure) (Crooks, ...
BCB 311 Biodiversity & Conservation Biology
... Have some outstanding feature that was not seen within other groups of organisms before presence of limbs - tongue * use to catch prey - eyelids * functions to keep eyes moist - ears * able to hear or pick-up sound waves - voice * which is produced in the larynx Within their life cycle t ...
... Have some outstanding feature that was not seen within other groups of organisms before presence of limbs - tongue * use to catch prey - eyelids * functions to keep eyes moist - ears * able to hear or pick-up sound waves - voice * which is produced in the larynx Within their life cycle t ...
CHAPTER 5. THREATS AND EMERGING CONCERNS 5.1
... For this discussion, development includes housing and urban areas, commercial and industrial areas, and tourism and recreation areas that have a substantial footprint (Salafsky et al. 2008). The U.S. Geological Survey (USGS) suggests that the threat to ecosystems from development patterns and curren ...
... For this discussion, development includes housing and urban areas, commercial and industrial areas, and tourism and recreation areas that have a substantial footprint (Salafsky et al. 2008). The U.S. Geological Survey (USGS) suggests that the threat to ecosystems from development patterns and curren ...
Large Species Shifts Triggered by Small Forces
... that had not yet reached a point attractor or if the system had become cyclic, the number of alternative attractors was counted by visual inspection of the runs. The results show that from a given species pool several alternative communities can usually be assembled (fig. 2). These alternative commu ...
... that had not yet reached a point attractor or if the system had become cyclic, the number of alternative attractors was counted by visual inspection of the runs. The results show that from a given species pool several alternative communities can usually be assembled (fig. 2). These alternative commu ...
What enables coexistence in plant communities? Weak versus
... Explaining the coexistence of species that basically depend on the same resources has been a brainteaser for generations of ecologists. Different mechanisms have been proposed to facilitate coexistence in plant communities, where space is an important resource. Using a stochastic cellular automaton ...
... Explaining the coexistence of species that basically depend on the same resources has been a brainteaser for generations of ecologists. Different mechanisms have been proposed to facilitate coexistence in plant communities, where space is an important resource. Using a stochastic cellular automaton ...
Climate Change and Fish Communities: A Conceptual Framework
... will experience greater changes in climate, and at a faster rate, than have occurred at least since the end of the last glaciation, 12,000 years ago. Hydrological effects of these changes should include not only higher water temperatures and longer icefree periods (Barry 1986), but also increased se ...
... will experience greater changes in climate, and at a faster rate, than have occurred at least since the end of the last glaciation, 12,000 years ago. Hydrological effects of these changes should include not only higher water temperatures and longer icefree periods (Barry 1986), but also increased se ...
The landscape context of trophic interactions: insect spillover across
... non-crop habitats and are hardly found in crops. Ground beetles of the genus Amara (Carabidae) are representative of this group as they only occur in hedgerows, and do not penetrate crops (Thomas et al. 2001). In contrast, “cultural species” have a preference for crops and occur only sparsely in non ...
... non-crop habitats and are hardly found in crops. Ground beetles of the genus Amara (Carabidae) are representative of this group as they only occur in hedgerows, and do not penetrate crops (Thomas et al. 2001). In contrast, “cultural species” have a preference for crops and occur only sparsely in non ...
Biodiversity and Climate Change: Integrating
... Ecology and evolution have developed as separate fields based on the distinction between “ecological time” and “evolutionary time” made by Slobodkin (1961). Hairston et al. (2005) have proposed that rapid evolution should be defined as genetic changes occurring fast enough to have a measurable impac ...
... Ecology and evolution have developed as separate fields based on the distinction between “ecological time” and “evolutionary time” made by Slobodkin (1961). Hairston et al. (2005) have proposed that rapid evolution should be defined as genetic changes occurring fast enough to have a measurable impac ...
Benchmarking novel approaches for modelling species range
... parameters remains unclear (Thuiller et al., 2014). Dynamic range models (DRM) have been introduced to overcome these issues. They do not rely on SDM output and directly relate demographic rates to environmental factors and simultaneously estimate parameters of the population model and the demograph ...
... parameters remains unclear (Thuiller et al., 2014). Dynamic range models (DRM) have been introduced to overcome these issues. They do not rely on SDM output and directly relate demographic rates to environmental factors and simultaneously estimate parameters of the population model and the demograph ...
Ecological Modelling Mathematical model of livestock and
... ˛ from a first neighbor occupied patch, with probability of colonization c˛ (˛ being x1 , x2 and y). Extinction. An occupied patch can be vacated by species ˛ with probability of local extinction e˛ . Predation. A patch that is occupied by either prey and by the predator has a probability of extinct ...
... ˛ from a first neighbor occupied patch, with probability of colonization c˛ (˛ being x1 , x2 and y). Extinction. An occupied patch can be vacated by species ˛ with probability of local extinction e˛ . Predation. A patch that is occupied by either prey and by the predator has a probability of extinct ...
Arion vulgaris - the aetiology of an invasive species
... found that individuals mainly laid eggs when they were 6-9 months in age; however, it was unclear whether age, the time of year, or body mass affected egg-laying ability. Although most slugs die after the reproductive period (75%), some do overwinter and, in the laboratory, may live for as long as t ...
... found that individuals mainly laid eggs when they were 6-9 months in age; however, it was unclear whether age, the time of year, or body mass affected egg-laying ability. Although most slugs die after the reproductive period (75%), some do overwinter and, in the laboratory, may live for as long as t ...
Lecture Outlines Natural Disasters, 5th edition
... • Reproductively isolated by differences from other species • Share common pool of genetic material (genome) • May migrate over broad area mutation of genes may cause reproductive isolation between local populations evolution (Darwin: descent with modification) ...
... • Reproductively isolated by differences from other species • Share common pool of genetic material (genome) • May migrate over broad area mutation of genes may cause reproductive isolation between local populations evolution (Darwin: descent with modification) ...