Root–root interactions: extending our perspective
... 2006), because these resources are usually found at an optimum during specific time periods and at specific locations. According to ecological theory, strong competition could lead to so-called ‘competitive exclusion under limiting similarity’ from a community of plants, i.e. species are more likely ...
... 2006), because these resources are usually found at an optimum during specific time periods and at specific locations. According to ecological theory, strong competition could lead to so-called ‘competitive exclusion under limiting similarity’ from a community of plants, i.e. species are more likely ...
Fulltext - ETH E
... Experiments that manipulated plant species richness in temperate grasslands have generally found that species richness increased plant productivity. It has often been suggested that this is due to complementary use of resources—such as nitrogen—by plant species. Complementarity, e.g., in space, chem ...
... Experiments that manipulated plant species richness in temperate grasslands have generally found that species richness increased plant productivity. It has often been suggested that this is due to complementary use of resources—such as nitrogen—by plant species. Complementarity, e.g., in space, chem ...
Integrated Management of Vertebrate Pests in Alfalfa
... irrigated fields, gopher populations may grow significantly throughout the year. A successful pocket gopher control program depends on early detection and control measures appropriate to the location and situation. Since individual burrow systems must be treated to control gophers, the cost of contr ...
... irrigated fields, gopher populations may grow significantly throughout the year. A successful pocket gopher control program depends on early detection and control measures appropriate to the location and situation. Since individual burrow systems must be treated to control gophers, the cost of contr ...
Integrating ecosystem engineering and food webs
... abiotic resources (for explanation of how engineers cause such changes see Jones et al. 2010). 1) Abiotic conditions are non-resource abiotic factors that affect species, such as temperature, pH, redox, wind and sediment deposition. Conditions are commonly altered by engineers (Jones et al. 2010). ...
... abiotic resources (for explanation of how engineers cause such changes see Jones et al. 2010). 1) Abiotic conditions are non-resource abiotic factors that affect species, such as temperature, pH, redox, wind and sediment deposition. Conditions are commonly altered by engineers (Jones et al. 2010). ...
Integrating ecosystem engineering and food webs
... abiotic resources (for explanation of how engineers cause such changes see Jones et al. 2010). 1) Abiotic conditions are non-resource abiotic factors that affect species, such as temperature, pH, redox, wind and sediment deposition. Conditions are commonly altered by engineers (Jones et al. 2010). ...
... abiotic resources (for explanation of how engineers cause such changes see Jones et al. 2010). 1) Abiotic conditions are non-resource abiotic factors that affect species, such as temperature, pH, redox, wind and sediment deposition. Conditions are commonly altered by engineers (Jones et al. 2010). ...
Stoichiometry and population dynamics
... low nutrient content in the autotrophs. To the extent that there are ontogenetic shifts in metabolic and stoichiometric requirements, stoichiometric facilitation could thus also have strong bearings for age-structure in populations. The positive density dependence resulting from stoichiometric facil ...
... low nutrient content in the autotrophs. To the extent that there are ontogenetic shifts in metabolic and stoichiometric requirements, stoichiometric facilitation could thus also have strong bearings for age-structure in populations. The positive density dependence resulting from stoichiometric facil ...
The role of mixotrophic protists in the biological carbon pump
... unique taxonomic group but, rather, occurs amongst different species ranging over a variety of groups (Stoecker et al., 2009; Flynn et al., 2013). It is a common phenomenon occurring widely in marine (e.g. eutrophic, mesotrophic and oligotrophic, coastal to open-ocean systems; Pitta and Giannakourou ...
... unique taxonomic group but, rather, occurs amongst different species ranging over a variety of groups (Stoecker et al., 2009; Flynn et al., 2013). It is a common phenomenon occurring widely in marine (e.g. eutrophic, mesotrophic and oligotrophic, coastal to open-ocean systems; Pitta and Giannakourou ...
Daphnia species invasion, competitive exclusion, and chaotic
... the smallest. If we compare the monoculture test cases, the algal C:P ratio in D. pulex alone jars was larger than the algal C:P ratio in D. lumholtzi alone jars. This observation implies that D. pulex sequestered more nutrients than D. lumholtzi. The dynamics of the Daphnia populations are shown in ...
... the smallest. If we compare the monoculture test cases, the algal C:P ratio in D. pulex alone jars was larger than the algal C:P ratio in D. lumholtzi alone jars. This observation implies that D. pulex sequestered more nutrients than D. lumholtzi. The dynamics of the Daphnia populations are shown in ...
Hydrilla - Invasive.Org
... H. verticillata is a submerged aquatic perennial plant that is highly variable in appearance, depending upon the conditions under which it is growing (Verkleij et al. 1983; Pieterse et al. 1985). H. verticillata generally is rooted to the bottom, although sometimes fragments will break loose and sur ...
... H. verticillata is a submerged aquatic perennial plant that is highly variable in appearance, depending upon the conditions under which it is growing (Verkleij et al. 1983; Pieterse et al. 1985). H. verticillata generally is rooted to the bottom, although sometimes fragments will break loose and sur ...
A gentle depilation of the niche: Dicean
... Niche size, palatability, etc.) and their location in the environment relative to temperature, predators, and other variables that determine the real availability of the resources to a species with finite capacities for dealing with such potentially hostile factors. The first approach is that implic ...
... Niche size, palatability, etc.) and their location in the environment relative to temperature, predators, and other variables that determine the real availability of the resources to a species with finite capacities for dealing with such potentially hostile factors. The first approach is that implic ...
Dormant Season Grazing May Decrease Wildfire Probability by Increasing Fuel Moisture and Reducing Fuel Amount and Continuity
... Abstract. Mega-fires and unprecedented expenditures on fire suppression over the past decade have resulted in a renewed focus on presuppression management. Dormant season grazing may be a treatment to reduce fuels in rangeland, but its effects have not been evaluated. In the present study, we evalua ...
... Abstract. Mega-fires and unprecedented expenditures on fire suppression over the past decade have resulted in a renewed focus on presuppression management. Dormant season grazing may be a treatment to reduce fuels in rangeland, but its effects have not been evaluated. In the present study, we evalua ...
NATURESCAPE - District of Saanich
... The small part of our rugged beautiful province favoured for human habitation draws in rapidly increasing numbers of people.This small area must accommodate our homes, our towns and cities, industry, transportation and utility corridors, many of our opportunities for recreation, for agriculture and ...
... The small part of our rugged beautiful province favoured for human habitation draws in rapidly increasing numbers of people.This small area must accommodate our homes, our towns and cities, industry, transportation and utility corridors, many of our opportunities for recreation, for agriculture and ...
Toward an old-growth concept for grasslands, savannas, and
... Reducing Emissions from Deforestation and Forest Degradation (REDD+), as well as the definitions of “forest” used by the United Nations Food and Agriculture Organization, put grasslands at risk from afforestation projects and agricultural conversion. Grasslands are a target for C sequestration proje ...
... Reducing Emissions from Deforestation and Forest Degradation (REDD+), as well as the definitions of “forest” used by the United Nations Food and Agriculture Organization, put grasslands at risk from afforestation projects and agricultural conversion. Grasslands are a target for C sequestration proje ...
Prey consumption of Steller sea lions Eumetopias
... Aleutian Islands consumed just over twice this amount (303,000 [±57,500] t). In terms of biomass removed in 1998 from Alaskan waters, we estimated that Steller sea lions accounted for about 5% of the natural mortality of gadids (pollock and cod) and up to 75% of the natural mortality of hexagram mi ...
... Aleutian Islands consumed just over twice this amount (303,000 [±57,500] t). In terms of biomass removed in 1998 from Alaskan waters, we estimated that Steller sea lions accounted for about 5% of the natural mortality of gadids (pollock and cod) and up to 75% of the natural mortality of hexagram mi ...
Parasitic plants: parallels and contrasts with herbivores
... Tel.: +1-713-7432989, Fax. +1-713-7432636 ...
... Tel.: +1-713-7432989, Fax. +1-713-7432636 ...
fulltext
... Species are embedded in communities in which they interact in complex ways with other species. Complexity increases even further because population structure is not only determined by intraspecific interactions but also by interspecific interactions that all change as individuals grow. Which stages ...
... Species are embedded in communities in which they interact in complex ways with other species. Complexity increases even further because population structure is not only determined by intraspecific interactions but also by interspecific interactions that all change as individuals grow. Which stages ...
Managing weeds in vegetables organically R
... weed-infested fields should be set aside or planted as fields with non-row crops such as alfalfa or perennial cover crops. This long term coverage should help prevent further buildup of weeds. Crop rotation. Crop rotation is probably the most important IWM tool and should be the cornerstone of any w ...
... weed-infested fields should be set aside or planted as fields with non-row crops such as alfalfa or perennial cover crops. This long term coverage should help prevent further buildup of weeds. Crop rotation. Crop rotation is probably the most important IWM tool and should be the cornerstone of any w ...
Biodiversity Plan - Banyule City Council
... municipality and are strongly supported by community values. The enhancement and maintenance of Banyule’s parks, reserves and private gardens is paramount in contributing to sustainability and a sense of wellbeing in the community. We will explore innovative models for water and energy management in ...
... municipality and are strongly supported by community values. The enhancement and maintenance of Banyule’s parks, reserves and private gardens is paramount in contributing to sustainability and a sense of wellbeing in the community. We will explore innovative models for water and energy management in ...
Biotic interactions in Antarctic terrestrial ecosystems: Are they a factor?
... assess biodiversity here, what are the chances of us being able to assess more complex ecosystems elsewhere? The increasing use and accessibility of molecular techniques (e.g. DNA barcoding, Hebert et al., 2003), may greatly assist in this regard. Secondly, as in other ecosystems, we need to enhance ...
... assess biodiversity here, what are the chances of us being able to assess more complex ecosystems elsewhere? The increasing use and accessibility of molecular techniques (e.g. DNA barcoding, Hebert et al., 2003), may greatly assist in this regard. Secondly, as in other ecosystems, we need to enhance ...
Revisiting Carrying Capacity: Area-Based Indicators of Sustainability
... provides such services as waste assimilation, erosion and flood control, and protection from ultra-violet radiation (the ozone layer is a form of natural capital). These life support services are also counted as natural income. Since the flow of services from ecosystems often requires that they func ...
... provides such services as waste assimilation, erosion and flood control, and protection from ultra-violet radiation (the ozone layer is a form of natural capital). These life support services are also counted as natural income. Since the flow of services from ecosystems often requires that they func ...
Exemplar for Internal Achievement Standard Biology Level 2
... particles are removed by palps and redirected to the exhalent stream. When cockles are feeding, their siphons can be seen above the surface sediment. Both siphons are designed to give the cockle structure and direction in the inhaling of water and food and the exhaling of waste. These siphons mean t ...
... particles are removed by palps and redirected to the exhalent stream. When cockles are feeding, their siphons can be seen above the surface sediment. Both siphons are designed to give the cockle structure and direction in the inhaling of water and food and the exhaling of waste. These siphons mean t ...
Endeavour Hydrothermal Vents: Canada`s First Marine Protected Area.
... relatively undisturbed by humanity, in a natural form. A natural resource is often characterized by the amount of biodiversity that exists in various ecosystems. Natural resources are derived from the environment. 19. non-renewable - Something that cannot be replaced once it is used or that may take ...
... relatively undisturbed by humanity, in a natural form. A natural resource is often characterized by the amount of biodiversity that exists in various ecosystems. Natural resources are derived from the environment. 19. non-renewable - Something that cannot be replaced once it is used or that may take ...
Trophic facilitation by introduced top predators: grey wolf subsidies
... point at which canids and bears will change feeding technique by using their carnassial teeth to scrape and chew meat off the bone (Wilmers & Stahler 2002). The remainder of the muscle was scraped off the bones, weighed and recorded as stage-3 biomass. The brain and hide were also weighed and logged ...
... point at which canids and bears will change feeding technique by using their carnassial teeth to scrape and chew meat off the bone (Wilmers & Stahler 2002). The remainder of the muscle was scraped off the bones, weighed and recorded as stage-3 biomass. The brain and hide were also weighed and logged ...
Ecological subsystems via graph theory: the role of
... Using the standard aggregation technique for networks (Ulanowicz and Kemp 1979) and removing selfloops created during this process, every SCC was transformed into a single compartment. In this way, a DAG for every network was obtained. Performing topological sort on each DAG yielded a sequential cha ...
... Using the standard aggregation technique for networks (Ulanowicz and Kemp 1979) and removing selfloops created during this process, every SCC was transformed into a single compartment. In this way, a DAG for every network was obtained. Performing topological sort on each DAG yielded a sequential cha ...