Teachers` notes
... research. Nitrogen pollution is thought to have an effect on human health, reacting with haemoglobin in the blood, decreasing the function of the thyroid gland and causing Vitamin A deficiencies. Nitrous oxide is an important greenhouse gas and is thought to be contributing to climate change. The de ...
... research. Nitrogen pollution is thought to have an effect on human health, reacting with haemoglobin in the blood, decreasing the function of the thyroid gland and causing Vitamin A deficiencies. Nitrous oxide is an important greenhouse gas and is thought to be contributing to climate change. The de ...
Coexistence, niches and biodiversity effects on ecosystem functioning
... stabilising niche differences, regardless of their form, can be identified using only monoculture and mixture yields, and perhaps more importantly, is it possible to know whether the mixture is stable and that the benefits of diversity will persist? Biodiversity-ecosystem function experiments In con ...
... stabilising niche differences, regardless of their form, can be identified using only monoculture and mixture yields, and perhaps more importantly, is it possible to know whether the mixture is stable and that the benefits of diversity will persist? Biodiversity-ecosystem function experiments In con ...
Spora and Gaia: how microbes fly with their clouds
... waters may help create local tropospheric quasi-instabilities that will be responsive to seeding, (iv) plankton in blooms concentrate especially in the extreme surface layers, as appropriate for take-off (PINGREE et al. 1975, FUDGE 1977, PAERL 1988, MALIN et al. 1994), (v) as plankton exhaust local ...
... waters may help create local tropospheric quasi-instabilities that will be responsive to seeding, (iv) plankton in blooms concentrate especially in the extreme surface layers, as appropriate for take-off (PINGREE et al. 1975, FUDGE 1977, PAERL 1988, MALIN et al. 1994), (v) as plankton exhaust local ...
Bearzi G. 2004. Investigating food
... investigate this problem into further detail, and (3) to propose the semi-enclosed waters of the Amvrakikos Gulf, north-western Greece, as a promising “natural laboratory” where ecological interactions between common bottlenose dolphins (Tursiops truncatus) and fisheries can be investigated. ...
... investigate this problem into further detail, and (3) to propose the semi-enclosed waters of the Amvrakikos Gulf, north-western Greece, as a promising “natural laboratory” where ecological interactions between common bottlenose dolphins (Tursiops truncatus) and fisheries can be investigated. ...
Biodiversity and Ecosystem Functioning - annurev-ecolsys
... Biodiversity is now known to be a major determinant, perhaps the major determinant, of community and ecosystem dynamics and functioning. This discovery, which required two decades of research by hundreds of ecologists from around the world, represents a major reversal from the paradigm of the 1970s ...
... Biodiversity is now known to be a major determinant, perhaps the major determinant, of community and ecosystem dynamics and functioning. This discovery, which required two decades of research by hundreds of ecologists from around the world, represents a major reversal from the paradigm of the 1970s ...
Restoration in the Rainshadow - SER
... native and exotic species, connectivity and fragmentation of habitats, and ecosystem integrity (Povilitis 2002). For the most part, restoration activities have included volunteer-based exotic plant removal programs, specifically “broom bashes” and “ivy pulls.” There have been noteworthy strides in n ...
... native and exotic species, connectivity and fragmentation of habitats, and ecosystem integrity (Povilitis 2002). For the most part, restoration activities have included volunteer-based exotic plant removal programs, specifically “broom bashes” and “ivy pulls.” There have been noteworthy strides in n ...
biodiversity loss and ecosystem functioning
... Abstract. Given currently high rates of extinction, it is critical to be able to predict how ecosystems will respond to loss of species and consequent changes in community structure. Much previous research in this area has been based on terrestrial systems, using synthetically assembled communities. ...
... Abstract. Given currently high rates of extinction, it is critical to be able to predict how ecosystems will respond to loss of species and consequent changes in community structure. Much previous research in this area has been based on terrestrial systems, using synthetically assembled communities. ...
Mechanisms structuring the pelagic microbial food web
... Phagotrophic flagellates utilize energy and substrate from particulate organic material. The most common obligate phagotrophic flagellates are found within heterokont taxa (chrysomonads and bicosoecids), dinophycean and choanoflagellates (Boenigk and Arndt 2002). In addition a large group of known s ...
... Phagotrophic flagellates utilize energy and substrate from particulate organic material. The most common obligate phagotrophic flagellates are found within heterokont taxa (chrysomonads and bicosoecids), dinophycean and choanoflagellates (Boenigk and Arndt 2002). In addition a large group of known s ...
Asymmetrical food web responses in trophic
... during fall. Such patterns of seasonal sensitivity have been documented for zooplankton in response to ultraviolet radiation (Xenopoulos et al. 2000) and methylmercury contamination (Cleckner et al. 2003). Seasonal dynamics in the taxonomic composition of zooplankton can be a regular feature of lake ...
... during fall. Such patterns of seasonal sensitivity have been documented for zooplankton in response to ultraviolet radiation (Xenopoulos et al. 2000) and methylmercury contamination (Cleckner et al. 2003). Seasonal dynamics in the taxonomic composition of zooplankton can be a regular feature of lake ...
Functional traits, productivity and effects on nitrogen
... than by acquiring more N. Greater relative production below ground, and the production of long-lived below-ground structures, were both important in determining the high root : shoot ratio of species. 3. For legumes, N2 fixation not only led to greater above-ground biomass production, but also was a ...
... than by acquiring more N. Greater relative production below ground, and the production of long-lived below-ground structures, were both important in determining the high root : shoot ratio of species. 3. For legumes, N2 fixation not only led to greater above-ground biomass production, but also was a ...
Document - The Agricultural Research Center
... through slow release during the vegetative period leading to increase yield and quality of crop (Rodriguez, 2000). Vinasse is a final by product of the sugar industry, with great agricultural interest, because of its organic matter content, N and K concentrations (Madejon et al., 2001). Also, vinass ...
... through slow release during the vegetative period leading to increase yield and quality of crop (Rodriguez, 2000). Vinasse is a final by product of the sugar industry, with great agricultural interest, because of its organic matter content, N and K concentrations (Madejon et al., 2001). Also, vinass ...
Herbivory from Individuals to Ecosystems
... setting dP/dt = dH/dt = 0 and solving for equilibrium densities of plants (P∗ ) in food chains without herbivores, with herbivores, and with herbivores and carnivores; and herbivores (H∗ ) in food chains with and without carnivores. The modeling shows that relative and absolute resource limitation o ...
... setting dP/dt = dH/dt = 0 and solving for equilibrium densities of plants (P∗ ) in food chains without herbivores, with herbivores, and with herbivores and carnivores; and herbivores (H∗ ) in food chains with and without carnivores. The modeling shows that relative and absolute resource limitation o ...
book of abstracts
... for consistent aggregation across scales and comparison of results. In addition, it is important to assess data availability and methods for ecosystem mapping and assessment for Norway. Mapping and assessing the state of ecosystems and their services in Norway will be tightly aligned with the evolvi ...
... for consistent aggregation across scales and comparison of results. In addition, it is important to assess data availability and methods for ecosystem mapping and assessment for Norway. Mapping and assessing the state of ecosystems and their services in Norway will be tightly aligned with the evolvi ...
Presentación de PowerPoint
... provides, including water supply and quality, prevention of soil erosion, carbon capture and sequestration, and biodiversity. The impacts of climate change intensify these effects, which is likely to have serious consequences for future development. ...
... provides, including water supply and quality, prevention of soil erosion, carbon capture and sequestration, and biodiversity. The impacts of climate change intensify these effects, which is likely to have serious consequences for future development. ...
The Scale of Successional Models and Restoration Objectives
... may require spatially infrequent events for reproduction or high rates of immigration to maintain populations (Pickett & Thompson 1978). Each situation requires a careful consideration of what community can be maintained, what processes must be re-added, such as infrequent disturbances, and what new ...
... may require spatially infrequent events for reproduction or high rates of immigration to maintain populations (Pickett & Thompson 1978). Each situation requires a careful consideration of what community can be maintained, what processes must be re-added, such as infrequent disturbances, and what new ...
Full text for subscribers
... available nutrients. Nitrogen was easy to lose and soil available phosphorus (AP) was low when soil water content was smaller than 85% of field capacity. The soil available potassium (AK) was decreased when it was larger than 100% of field capacity. In terms of duration, 15 - 20 d was optimal where ...
... available nutrients. Nitrogen was easy to lose and soil available phosphorus (AP) was low when soil water content was smaller than 85% of field capacity. The soil available potassium (AK) was decreased when it was larger than 100% of field capacity. In terms of duration, 15 - 20 d was optimal where ...
Effect of diffuse and point source nutrient supply on the low diverse
... area. The latter is classified among the most conserved ecosystems in Estonia. However, it may receive nutrients from the Gulf of Riga. Shallow depths and isolation favour light penetration and nutrient accumulation and, therefore, we may expect a higher productivity and a fast eutrophication process ...
... area. The latter is classified among the most conserved ecosystems in Estonia. However, it may receive nutrients from the Gulf of Riga. Shallow depths and isolation favour light penetration and nutrient accumulation and, therefore, we may expect a higher productivity and a fast eutrophication process ...
500 AP Exam Questions - Mr. D`s Science Page
... 66. Which of the following ecosystems has the highest average net primary productivity? a) agricultural land b) open ocean c) temperate forest d) swamps and marshes e) lakes and streams 67. Humans are most likely to alter the earth’s thermostat through their impact on the compound. a) carbon dioxide ...
... 66. Which of the following ecosystems has the highest average net primary productivity? a) agricultural land b) open ocean c) temperate forest d) swamps and marshes e) lakes and streams 67. Humans are most likely to alter the earth’s thermostat through their impact on the compound. a) carbon dioxide ...
Biodiversity loss and its impact on humanity
... of the effects of biodiversity on ecosystem processes, DIVERSITAS, the international programme dedicated to biodiversity science, produced a global research agenda6. By the mid-1990s, BEF studies had manipulated the species richness of plants in laboratory and field experiments and suggested that ec ...
... of the effects of biodiversity on ecosystem processes, DIVERSITAS, the international programme dedicated to biodiversity science, produced a global research agenda6. By the mid-1990s, BEF studies had manipulated the species richness of plants in laboratory and field experiments and suggested that ec ...
FEEDBACK IN THE PLANT-SOIL SYSTEM Joan G
... to explain community composition and community dynamics (33–35). Microbiologists have focused on the size, composition, and activity of the microbiota associated with plant roots as well as the role of plants in driving these variables. Plant scientists have focused on the mechanisms and functions o ...
... to explain community composition and community dynamics (33–35). Microbiologists have focused on the size, composition, and activity of the microbiota associated with plant roots as well as the role of plants in driving these variables. Plant scientists have focused on the mechanisms and functions o ...
Supplementary Online Material
... nutrient and energy flow, while double-headed arrows with dotted outlines indicate resource competition. + and – symbols within arrows indicate benefit or cost to each participant (e.g. + + within an arrow is a mutualism). The proportion of colours within each arrow indicates the proportion of inter ...
... nutrient and energy flow, while double-headed arrows with dotted outlines indicate resource competition. + and – symbols within arrows indicate benefit or cost to each participant (e.g. + + within an arrow is a mutualism). The proportion of colours within each arrow indicates the proportion of inter ...
Where less may be more: how the rare biosphere pulls
... (Gaston, 2008). Current abrupt changes linked to human activity, such as global change and intensive land use, may thus have a deep impact on the rare biosphere and associated ecosystem functions (Rodrigues et al., 2013). Monitoring changes in relative abundances or activities of rare microbes might ...
... (Gaston, 2008). Current abrupt changes linked to human activity, such as global change and intensive land use, may thus have a deep impact on the rare biosphere and associated ecosystem functions (Rodrigues et al., 2013). Monitoring changes in relative abundances or activities of rare microbes might ...
Competition hierarchy, transitivity and additivity: investigating the
... Understanding which features competitionorganised communities have is essential to predicting their potential for coexistence (Keddy and Shipley 1989). For example Roxburgh and Wilson (2000) showed with data from an experimental lawn community, that transitivity makes communities in mathematical mod ...
... Understanding which features competitionorganised communities have is essential to predicting their potential for coexistence (Keddy and Shipley 1989). For example Roxburgh and Wilson (2000) showed with data from an experimental lawn community, that transitivity makes communities in mathematical mod ...
Human impact on the nitrogen cycle
Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation. As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over the past century. Global atmospheric nitrous oxide (N2O) mole fractions have increased from a pre-industrial value of ~270 nmol/mol to ~319 nmol/mol in 2005. Human activities account for over one-third of N2O emissions, most of which are due to the agricultural sector. This article is intended to give a brief review of the history of anthropogenic N inputs, and reported impacts of nitrogen inputs on selected terrestrial and aquatic ecosystems.