Factors Influencing Macroinvertebrate Diversity and Community
... Identifying the factors important in shaping patterns of species among habitats is a central goal of community ecology (Death and Winterbourn 1995, Jocqueʹ′ et al. 2007a). Across many systems, species diversity can be regulated by local biotic factors (such as competition, predation and disease), lo ...
... Identifying the factors important in shaping patterns of species among habitats is a central goal of community ecology (Death and Winterbourn 1995, Jocqueʹ′ et al. 2007a). Across many systems, species diversity can be regulated by local biotic factors (such as competition, predation and disease), lo ...
Aquatic Ecosystems
... potential for colonization and entry of new species. Species richness increases in mid-order to lower stream reaches due to increased environmental stability, greater numbers of potential habitats, and increases in numbers of colonization sources or links between major drainages. As one proceeds dow ...
... potential for colonization and entry of new species. Species richness increases in mid-order to lower stream reaches due to increased environmental stability, greater numbers of potential habitats, and increases in numbers of colonization sources or links between major drainages. As one proceeds dow ...
Relative importance of endogenous and exogenous mechanisms in
... they minimize fitness differences between species (these are equalizing mechanisms) or they increase the relative strength of intraspecific limitation over interspecific limitation (stabilizing mechanisms). This framework employs a modern definition of stable coexistence, which can be broadly equate ...
... they minimize fitness differences between species (these are equalizing mechanisms) or they increase the relative strength of intraspecific limitation over interspecific limitation (stabilizing mechanisms). This framework employs a modern definition of stable coexistence, which can be broadly equate ...
WB_A_53-56
... in a community over time is called ecological succession. Over the course of succession, the number of different species usually increases. Primary succession begins in areas with no remnants of an older community. It occurs on bare rock surfaces where no soil exists. The first species to live in an ...
... in a community over time is called ecological succession. Over the course of succession, the number of different species usually increases. Primary succession begins in areas with no remnants of an older community. It occurs on bare rock surfaces where no soil exists. The first species to live in an ...
Effects of disturbance by Siberian marmots (Marmota sibirica) on
... Mongolia (Zahler et al. 2004); however, little is known about some of its ecological roles; in particular in creating spatial heterogeneity at the landscape scale. The types of vegetation that grow on the mounds created by Siberian marmots can differ greatly from that on the surrounding, comparative ...
... Mongolia (Zahler et al. 2004); however, little is known about some of its ecological roles; in particular in creating spatial heterogeneity at the landscape scale. The types of vegetation that grow on the mounds created by Siberian marmots can differ greatly from that on the surrounding, comparative ...
Primary Succession and Ecosystem Rehabilitation
... immigration into the affected area as far into the future as primary succession proceeds. Low-density agrarian cultures are perhaps most resilient (e.g. farmers in Peru after the 1970 earthquake; Oliver-Smith & Hoffman, 1999) because they are relatively self-reliant. If the disturbance is ephemeral ...
... immigration into the affected area as far into the future as primary succession proceeds. Low-density agrarian cultures are perhaps most resilient (e.g. farmers in Peru after the 1970 earthquake; Oliver-Smith & Hoffman, 1999) because they are relatively self-reliant. If the disturbance is ephemeral ...
Changing Gears—Abiotic vs. Biotic Factors
... By the end of class today, you will be able to: distinguish the difference between biotic and abiotic factors and the role they play in environmental communities to identify the 4 mains parts of energy flow through an ecosystem ...
... By the end of class today, you will be able to: distinguish the difference between biotic and abiotic factors and the role they play in environmental communities to identify the 4 mains parts of energy flow through an ecosystem ...
Notes from Introduction - Forest Landscape Ecology Lab
... - These basic definitions of patches can be extended, but looking at different possible configurations on the LS- CONNECTIVITY between patches on a landscape may be important for aspects of landscape stability- maintaining species or processes over time. - Linear patches can serve as CORRIDORS when ...
... - These basic definitions of patches can be extended, but looking at different possible configurations on the LS- CONNECTIVITY between patches on a landscape may be important for aspects of landscape stability- maintaining species or processes over time. - Linear patches can serve as CORRIDORS when ...
School in the Clouds and Education Standards Hawk Mountain`s
... Organisms are made of parts and have characteristics that make them similar and different. Organisms have basic needs for survival. Habitat loss effects both the interaction among species and the population of a species. Predator/prey relationships have a role in an ecosystem. Producers, consumers a ...
... Organisms are made of parts and have characteristics that make them similar and different. Organisms have basic needs for survival. Habitat loss effects both the interaction among species and the population of a species. Predator/prey relationships have a role in an ecosystem. Producers, consumers a ...
Effects of small-scale disturbance on invasion success in marine
... 1985, 2001). Given sufficient variation in recruit densities, disturbances that are large in size are more likely to lead to changes in community assemblage and succession than small-scale disturbances (Petraitis and Latham, 1999). Although it is clear that disturbance severity, with cascading effec ...
... 1985, 2001). Given sufficient variation in recruit densities, disturbances that are large in size are more likely to lead to changes in community assemblage and succession than small-scale disturbances (Petraitis and Latham, 1999). Although it is clear that disturbance severity, with cascading effec ...
Impact of pocket gopher disturbance on plant species diversity in a
... although Reichman and Smith (1985) studied the vegetation overlying pocket gopher tunnels. More recently Hobbs and Mooney (1985), Spencer et al. (1985), Williams and Cameron (1986), and Reichman (1988) have reported on the impact of pocket gophers on vegetational composition and plant yield. Hobbs e ...
... although Reichman and Smith (1985) studied the vegetation overlying pocket gopher tunnels. More recently Hobbs and Mooney (1985), Spencer et al. (1985), Williams and Cameron (1986), and Reichman (1988) have reported on the impact of pocket gophers on vegetational composition and plant yield. Hobbs e ...
Unit 2 * Ecosystems and Population Change
... – Predators have adaptations to help them catch their prey. – Prey have adaptations to help avoid predators. • Examples of adaptations include spines and shells, camouflage and mimicry. – The numbers of predators and prey influence each other. ...
... – Predators have adaptations to help them catch their prey. – Prey have adaptations to help avoid predators. • Examples of adaptations include spines and shells, camouflage and mimicry. – The numbers of predators and prey influence each other. ...
Unit 2 * Ecosystems and Population Change
... – Predators have adaptations to help them catch their prey. – Prey have adaptations to help avoid predators. • Examples of adaptations include spines and shells, camouflage and mimicry. – The numbers of predators and prey influence each other. ...
... – Predators have adaptations to help them catch their prey. – Prey have adaptations to help avoid predators. • Examples of adaptations include spines and shells, camouflage and mimicry. – The numbers of predators and prey influence each other. ...
Chapter 11
... – (a) Wave force can detach higher profile individuals – Clustering can protect from wave shock (as well as preventing excessive desiccation). – (b) Wave force is indirect – reduced or dissipated some – (c) Too dense can be a problem sometimes ...
... – (a) Wave force can detach higher profile individuals – Clustering can protect from wave shock (as well as preventing excessive desiccation). – (b) Wave force is indirect – reduced or dissipated some – (c) Too dense can be a problem sometimes ...
Petrogale penicillata - profile (PDF 560 KB)
... consisting of five to six individuals (NSW Scientific Committee). Each colony uses a number of different rocky outcrops or ‘refuges’(Jarman & Bayne, 1997). Refuges are generally caves or crevices among large boulders, but dense vegetation, in ...
... consisting of five to six individuals (NSW Scientific Committee). Each colony uses a number of different rocky outcrops or ‘refuges’(Jarman & Bayne, 1997). Refuges are generally caves or crevices among large boulders, but dense vegetation, in ...
Overview of Ecological Responses to the Eruption of Mount St. Helens
... assess the initial impacts of the eruption, which was important in understanding the subsequent quarter century of invasion and succession. Suddenly, and almost beyond comprehension, at 8:32 a.m. on May 18, 1980, and lasting for little more than 12 hours, the eruption of Mount St. Helens transformed ...
... assess the initial impacts of the eruption, which was important in understanding the subsequent quarter century of invasion and succession. Suddenly, and almost beyond comprehension, at 8:32 a.m. on May 18, 1980, and lasting for little more than 12 hours, the eruption of Mount St. Helens transformed ...
The population dynamics of the mangrove Avicennia marina
... other long-lived plants, often concentrate on components of the life cycle to explain present distribution and abundance. In mangroves, propagule predation (e.g. Robertson et al., 1990), dispersal (e.g. Rabinowitz, 1978), seedling growth (e.g. Ball, 1988) and seedling predation (e.g. Smith, 1987) ha ...
... other long-lived plants, often concentrate on components of the life cycle to explain present distribution and abundance. In mangroves, propagule predation (e.g. Robertson et al., 1990), dispersal (e.g. Rabinowitz, 1978), seedling growth (e.g. Ball, 1988) and seedling predation (e.g. Smith, 1987) ha ...
Frog Friendly Habitat - Ginninderra Catchment Group
... tadpoles are an important link in the food chain of many ecosystems and do a great job helping control insect pest populations. Tadpoles also act as natural nutrient filters and can help to control levels of algae in your pond. Frogs are often sensitive to changes in their habitat and can serve as i ...
... tadpoles are an important link in the food chain of many ecosystems and do a great job helping control insect pest populations. Tadpoles also act as natural nutrient filters and can help to control levels of algae in your pond. Frogs are often sensitive to changes in their habitat and can serve as i ...
Ecosystems in Action: Lessons from Marine Ecology about Recovery
... contribute strongly to the next generation. In most years, spawning is favored in at least one habitat, so the mixed reproductive strategies of the entire set of populations allows maintenance of high catch rates despite changes in the environment. The key feature of this system is that similar popu ...
... contribute strongly to the next generation. In most years, spawning is favored in at least one habitat, so the mixed reproductive strategies of the entire set of populations allows maintenance of high catch rates despite changes in the environment. The key feature of this system is that similar popu ...
Crab burrows and termite thermal chimneys as
... be scarce, and the role of temporary refuges in such places may be even more important in the structuring of biological communities than in more stable environments (e.g., Heemeyer et al. 2012). In flood-pulsed wetlands, where seasonal and spatial variation in hydrological conditions are the main dr ...
... be scarce, and the role of temporary refuges in such places may be even more important in the structuring of biological communities than in more stable environments (e.g., Heemeyer et al. 2012). In flood-pulsed wetlands, where seasonal and spatial variation in hydrological conditions are the main dr ...
Mechanisms of plant survival and mortality during drought: why do
... Overstory mortality reduces photosynthetic uptake, potentially causing ecosystems to become a source of CO2 to the atmosphere for some time period (Kurz & Apps, 1999; Law et al., 2001; Breshears & Allen, 2002; Clark, 2004; Dore et al., in press). Understory vegetation may respond with increased grow ...
... Overstory mortality reduces photosynthetic uptake, potentially causing ecosystems to become a source of CO2 to the atmosphere for some time period (Kurz & Apps, 1999; Law et al., 2001; Breshears & Allen, 2002; Clark, 2004; Dore et al., in press). Understory vegetation may respond with increased grow ...
Approaches to measuring the effects of human disturbance on birds
... Much of the research on this topic has focused on remote areas such as Antarctica, where visitor impacts on breeding bird colonies and appropriate visitor management strategies have been extensively studied (Yorio et al. 2001, Mason 2005). The differences between species reported in this study also ...
... Much of the research on this topic has focused on remote areas such as Antarctica, where visitor impacts on breeding bird colonies and appropriate visitor management strategies have been extensively studied (Yorio et al. 2001, Mason 2005). The differences between species reported in this study also ...
Species selection in hardwoods research
... substantial data were collected that indicated a lack of significance between the biomass and height obtained from grasses with decreased stomatal numbers. Fraser et al. (2008) reported increased stomatal densities in response to water stress, and decreased densities in response to a water surplus a ...
... substantial data were collected that indicated a lack of significance between the biomass and height obtained from grasses with decreased stomatal numbers. Fraser et al. (2008) reported increased stomatal densities in response to water stress, and decreased densities in response to a water surplus a ...
HABIT-CHANGE Priority matrix impacts per region and habitat
... In general, altering environmental conditions leads to ...
... In general, altering environmental conditions leads to ...
Lecture 22. Succession Reconsidered
... -in fact, successional sequence depends a great deal on chance events -most important of these is initial colonizers ** plants that colonize after a disturbance can vary greatly from one disturbance to another -these initial species have a strong influence on the direction in which succession procee ...
... -in fact, successional sequence depends a great deal on chance events -most important of these is initial colonizers ** plants that colonize after a disturbance can vary greatly from one disturbance to another -these initial species have a strong influence on the direction in which succession procee ...