asm_poster_final_doug
... and creosotebush (Larrea tridentata) in pure and mixed stands. The summer growing season following the fire was one of the driest on record (54 mm – mean is 144 mm), and, based on visual inspection, little or no growth occurred on either burned or unburned sites. In the spring of 2004, paired, side- ...
... and creosotebush (Larrea tridentata) in pure and mixed stands. The summer growing season following the fire was one of the driest on record (54 mm – mean is 144 mm), and, based on visual inspection, little or no growth occurred on either burned or unburned sites. In the spring of 2004, paired, side- ...
REGIME SHIFTS, RESILIENCE, AND BIODIVERSITY IN
... roles of biological diversity in this context. The evidence reveals that the likelihood of regime shifts may increase when humans reduce resilience by such actions as removing response diversity, removing whole functional groups of species, or removing whole trophic levels; impacting on ecosystems v ...
... roles of biological diversity in this context. The evidence reveals that the likelihood of regime shifts may increase when humans reduce resilience by such actions as removing response diversity, removing whole functional groups of species, or removing whole trophic levels; impacting on ecosystems v ...
Meta-ecosystems: a theoretical framework for a spatial ecosystem
... the impacts of these movements on nutrient cycling, primary productivity and species diversity at both the local and landscape or regional scales. Significant exchanges of materials and organisms also occur at the interface between terrestrial and aquatic ecosystems. Secondary productivity in rivers ...
... the impacts of these movements on nutrient cycling, primary productivity and species diversity at both the local and landscape or regional scales. Significant exchanges of materials and organisms also occur at the interface between terrestrial and aquatic ecosystems. Secondary productivity in rivers ...
Ecosystem Consequences of Biological Invasions
... of Elements within Ecosystems? Change in pool sizes has been examined in many studies of plant invasions. Liao et al. (2008), in a recent meta-analysis, found that plant invasions result in much higher pools of aboveground (133% higher) and belowground (5%) carbon (C), aboveground (85%) and belowgro ...
... of Elements within Ecosystems? Change in pool sizes has been examined in many studies of plant invasions. Liao et al. (2008), in a recent meta-analysis, found that plant invasions result in much higher pools of aboveground (133% higher) and belowground (5%) carbon (C), aboveground (85%) and belowgro ...
Land-use history - India Environment Portal
... forbs and pasture grasses compared to adjacent natural areas dominated by native vegetation (Torrusio, Cigliano & De Wysiecki 2002). Although these recent studies demonstrate clear contingencies in how land-use legacies affect consumer communities, whether historic agriculture alters relationships b ...
... forbs and pasture grasses compared to adjacent natural areas dominated by native vegetation (Torrusio, Cigliano & De Wysiecki 2002). Although these recent studies demonstrate clear contingencies in how land-use legacies affect consumer communities, whether historic agriculture alters relationships b ...
Agents of Pattern Formation: Disturbance Regimes
... Disturbance Regimes It should be obvious from the above that disturbance regimes do not operate independently to create landscape patterns, but rather interact with the physical template and biotic processes, often in synergistic ways, to affect landscape patterns. Indeed, in real landscapes it is e ...
... Disturbance Regimes It should be obvious from the above that disturbance regimes do not operate independently to create landscape patterns, but rather interact with the physical template and biotic processes, often in synergistic ways, to affect landscape patterns. Indeed, in real landscapes it is e ...
Background - NorthTree Fire International
... trigger germination (Keeley et al., 1985). Many shrubs are able to resprout only from fire-resistant roots or burls, while others germinate solely from seeds that respond to heat, smoke, and ash; some plants do both. (Keeley and Fotheringham, 1998, Keeley, 1987). Serotinous cypress and pine require ...
... trigger germination (Keeley et al., 1985). Many shrubs are able to resprout only from fire-resistant roots or burls, while others germinate solely from seeds that respond to heat, smoke, and ash; some plants do both. (Keeley and Fotheringham, 1998, Keeley, 1987). Serotinous cypress and pine require ...
Today we are going to discuss a very important topic namely
... Ecosystem was coined in 1930 by Roy Clapham, to denote the physical and biological components of an environment considered in relation to each other as a unit. British ecologist Arthur Tansley later refined the term, describing it as the interactive system established between biocoenosis (a group of ...
... Ecosystem was coined in 1930 by Roy Clapham, to denote the physical and biological components of an environment considered in relation to each other as a unit. British ecologist Arthur Tansley later refined the term, describing it as the interactive system established between biocoenosis (a group of ...
Ecological Burning in Box-Ironbark
... reduces the overstorey and that allows full recovery of structure is likely to be around 60 years. Further research is required to determine the germination requirements for Ironbark eucalypts. 4. Litter plays an important role in nutrient cycling, and provides important habitat for invertebrates an ...
... reduces the overstorey and that allows full recovery of structure is likely to be around 60 years. Further research is required to determine the germination requirements for Ironbark eucalypts. 4. Litter plays an important role in nutrient cycling, and provides important habitat for invertebrates an ...
Abstracts - Society For Range Management
... Fire is a natural disturbance that frequents most landscapes globally and produces varying disturbance intensities depending on several factors. Likely the most easily understood and manipulated factor affecting fire intensity on rangelands is the herbaceous fuel load. Alterations in plant community ...
... Fire is a natural disturbance that frequents most landscapes globally and produces varying disturbance intensities depending on several factors. Likely the most easily understood and manipulated factor affecting fire intensity on rangelands is the herbaceous fuel load. Alterations in plant community ...
(Corema conradii) benefits from ant seed dispersal in coastal US
... a key constituent of globally threatened coastal heathland ecosystems where fire is part of the disturbance regime. We conducted field studies at Cape Cod National Seashore, MA, USA to better understand the fruiting biology of C. conradii and to explore the benefits of ant seed dispersal. We identif ...
... a key constituent of globally threatened coastal heathland ecosystems where fire is part of the disturbance regime. We conducted field studies at Cape Cod National Seashore, MA, USA to better understand the fruiting biology of C. conradii and to explore the benefits of ant seed dispersal. We identif ...
Species interactions on the biome transition zone in
... second to fourth growing season. Black grama, one of the most important forage species of the semi-desert grassland type, was seriously damaged by burning, and did not recover during the period of study. It is not expected that blue grama, with its deeper root system (Riegel, 1940), will be affected ...
... second to fourth growing season. Black grama, one of the most important forage species of the semi-desert grassland type, was seriously damaged by burning, and did not recover during the period of study. It is not expected that blue grama, with its deeper root system (Riegel, 1940), will be affected ...
Disturbance, Diversity, and Invasion: Implications for
... changes in the system. In our discussion below, w e will include both direct disturbances (those affecting the survivorship of individuals directly) and indirect disturbance (those affecting resource levels or other conditions that then influence individuals in the patch). Disturbances to plant c o ...
... changes in the system. In our discussion below, w e will include both direct disturbances (those affecting the survivorship of individuals directly) and indirect disturbance (those affecting resource levels or other conditions that then influence individuals in the patch). Disturbances to plant c o ...
ECOSYSTEM FUNCTION, PRINCIPLES OF
... field that ecosystem primary productivity increases with increasing plant species diversity. The theoretical basis for the expectation that productivity and diversity should be related derives from an understanding of how limiting resources (water and nutrients) are distributed in ecosystems and an a ...
... field that ecosystem primary productivity increases with increasing plant species diversity. The theoretical basis for the expectation that productivity and diversity should be related derives from an understanding of how limiting resources (water and nutrients) are distributed in ecosystems and an a ...
fires, ecological effects of
... as an adaptive response to fire. Non-sprouting shrubs are particularly common in chaparral and similar shrublands and require fire to release seeds from serotinous cones or to stimulate germination. Among trees in fire-prone forests, many conifers do not sprout and a few eucalypts are also killed by fir ...
... as an adaptive response to fire. Non-sprouting shrubs are particularly common in chaparral and similar shrublands and require fire to release seeds from serotinous cones or to stimulate germination. Among trees in fire-prone forests, many conifers do not sprout and a few eucalypts are also killed by fir ...
Study Guide
... ABNC also reintroduces native plant species back into the prairie. Volunteers, schools and community groups from around the area frequently participate in our service learning projects, where they assist in planting native grasses and forbs that were propagated in ABNC’s native plant nursery. Our go ...
... ABNC also reintroduces native plant species back into the prairie. Volunteers, schools and community groups from around the area frequently participate in our service learning projects, where they assist in planting native grasses and forbs that were propagated in ABNC’s native plant nursery. Our go ...
Disturbance, Scale, and Boundary in Wilderness
... to the boreal forest (up to 0.3 m per year). These values are 5-10 times greater than the height growth rates of shade tolerant species in the same ecosystems. Species richness also varies along the latitudinal gradient. The consequence is that while all three areas have disturbance-dependent “fast ...
... to the boreal forest (up to 0.3 m per year). These values are 5-10 times greater than the height growth rates of shade tolerant species in the same ecosystems. Species richness also varies along the latitudinal gradient. The consequence is that while all three areas have disturbance-dependent “fast ...
Plant competition in mediterranean
... the patterns investigated by community ecologists are complex effects of factors other than competition. Stohlgren et al. (1984) found an increase of clumping in lower densities suggesting spatial mosaics of resource availability. Patterns of seed dispersal and specific regeneration types could also ...
... the patterns investigated by community ecologists are complex effects of factors other than competition. Stohlgren et al. (1984) found an increase of clumping in lower densities suggesting spatial mosaics of resource availability. Patterns of seed dispersal and specific regeneration types could also ...
Fire, Defoliation, and Competing Species Alter Aristida
... crown, making it more vulnerable to fire (Trlica and Schuster 1969) than species with greater proportions of their buds ...
... crown, making it more vulnerable to fire (Trlica and Schuster 1969) than species with greater proportions of their buds ...
Linking ecosystem and parasite ecology Michel Loreau,
... 2003). These new studies have all shown that plant diversity influences primary production through a complementarity effect generated by niche differentiation (which enhances resource exploitation by the community as a whole) and facilitation. Thus, there is little doubt that species diversity does ...
... 2003). These new studies have all shown that plant diversity influences primary production through a complementarity effect generated by niche differentiation (which enhances resource exploitation by the community as a whole) and facilitation. Thus, there is little doubt that species diversity does ...
Red Imported Fire Ants and Their Impacts on Wildlife
... stings can result in the death of small bodied animals, dramatically reducing populations of some wildlife species. In addition, fire ants can cause disfigurement and disablement of larger animals. Certain types of wildlife, such as deer, ground-nesting birds, and reptiles are especially vulnerable ...
... stings can result in the death of small bodied animals, dramatically reducing populations of some wildlife species. In addition, fire ants can cause disfigurement and disablement of larger animals. Certain types of wildlife, such as deer, ground-nesting birds, and reptiles are especially vulnerable ...
Succession in Ecosystems
... • secondary succession - series of changes that occur after a disturbance to an existing ecosystem • Can be a plowed field, a forest or pasture after a fire etc… • Occurs faster than primary succession because there is already soil. ...
... • secondary succession - series of changes that occur after a disturbance to an existing ecosystem • Can be a plowed field, a forest or pasture after a fire etc… • Occurs faster than primary succession because there is already soil. ...
Great Basin Fact Sheet No. 1: Putting Resilience and Resistance
... cool and moist areas (frigid-xeric) with relatively higher resilience and resistance recover more quickly and may not require follow-up actions. All areas will require monitoring to determine management needs after treatment. ...
... cool and moist areas (frigid-xeric) with relatively higher resilience and resistance recover more quickly and may not require follow-up actions. All areas will require monitoring to determine management needs after treatment. ...
climate change effects on vegetation distribution, carbon, and fire in
... art dynamic vegetation model, to investigate the sensitivity of natural ecosystems in California under two different future climate scenarios. MC1 simulates vegetation succession at large spatial extents through time while estimating variability in the carbon budget and responses to episodic events ...
... art dynamic vegetation model, to investigate the sensitivity of natural ecosystems in California under two different future climate scenarios. MC1 simulates vegetation succession at large spatial extents through time while estimating variability in the carbon budget and responses to episodic events ...
Josep Rost, Pere Pons, Josep M. Bas
... & Fuentes 1995). In the Mediterranean Basin the fruit of most fleshy-fruited plants ripens in autumn-winter, when it can be consumed by carnivore mammals and by wintering and resident frugivorous birds. These endozoochorous vertebrates digest the fruit pulp but defecate the viable seeds at some dist ...
... & Fuentes 1995). In the Mediterranean Basin the fruit of most fleshy-fruited plants ripens in autumn-winter, when it can be consumed by carnivore mammals and by wintering and resident frugivorous birds. These endozoochorous vertebrates digest the fruit pulp but defecate the viable seeds at some dist ...
Fire ecology
Fire ecology is concerned with the processes linking the natural incidence of fire in an ecosystem and the ecological effects of this fire. Many ecosystems, particularly prairie, savanna, chaparral and coniferous forests, have evolved with fire as a necessary contributor to habitat vitality and renewal. Many plant species in naturally fire-affected environments require fire to germinate, establish, or to reproduce. Wildfire suppression not only eliminates these species, but also the animals that depend upon them. Finally, fire suppression can lead to the build-up of flammable debris and the creation of less frequent but much larger and more destructive wildfires.Campaigns in the United States have historically molded public opinion to believe that wildfires are always harmful to nature. This view is based on the outdated belief that ecosystems progress toward an equilibrium and that any disturbance, such as fire, disrupts the harmony of nature. More recent ecological research has shown, however, that fire is an integral component in the function and biodiversity of many natural habitats, and that the organisms within these communities have adapted to withstand, and even to exploit, natural wildfire. More generally, fire is now regarded as a 'natural disturbance', similar to flooding, wind-storms, and landslides, that has driven the evolution of species and controls the characteristics of ecosystems. The map below right shows how each ecosystem type in the United States has a characteristic frequency of fire, ranging from once every 10 years to once every 500 years. Natural disturbances can be described by key factors such as frequency, intensity and area. The map also shows intensity, since some fires are understory fires (light burns that affect mostly understory plants) while others are stand replacement fires (intense fires that tend to kill the adult trees as well.)Fire suppression, in combination with other human-caused environmental changes, has resulted in unforeseen consequences for natural ecosystems. Some uncharacteristically large wildfires in the United States have been caused as a consequence of years of fire suppression and the continuing expansion of people into fire-adapted ecosystems. Land managers are faced with tough questions regarding where to restore a natural fire regime.