Benthic grazers and suspension feeders: Which one assumes the
... ABSTRACT: Size-frequency histograms of biomass, secondary production, respiration a n d energy flow of 4 dominant macrobenthic communities of the intertidal bay of K6nlgshafen were analysed and compared. In the shallow sandy fiats (Nereis-Corophium-belt [N.C.-belt], seagrass-bed and Arenicola-flat) ...
... ABSTRACT: Size-frequency histograms of biomass, secondary production, respiration a n d energy flow of 4 dominant macrobenthic communities of the intertidal bay of K6nlgshafen were analysed and compared. In the shallow sandy fiats (Nereis-Corophium-belt [N.C.-belt], seagrass-bed and Arenicola-flat) ...
ICCA Glossary - Certified Crop Adviser
... N-based nutrient application: The rate of application of a nitrogen containing material such that the desired amount of nitrogen is applied, regardless of the amounts of other nutrients being applied in the material. Nitrate (NO3-): An inorganic nitrogen form that is very soluble, easily leached fro ...
... N-based nutrient application: The rate of application of a nitrogen containing material such that the desired amount of nitrogen is applied, regardless of the amounts of other nutrients being applied in the material. Nitrate (NO3-): An inorganic nitrogen form that is very soluble, easily leached fro ...
Staghorn CoralS and Climate Change
... Indo-Pacific groups, and are generally located between 25˚N and 25˚S. The Atlantic group is by far the smaller of the two, being composed of only two extant species and a common hybrid, found along the Caribbean coasts of Central and South America, south-western Gulf of Mexico and the Bahamian archi ...
... Indo-Pacific groups, and are generally located between 25˚N and 25˚S. The Atlantic group is by far the smaller of the two, being composed of only two extant species and a common hybrid, found along the Caribbean coasts of Central and South America, south-western Gulf of Mexico and the Bahamian archi ...
soil morphology as an indicator of seasonal high water tables
... Soil is not a sterile medium but contains large numbers of microorganisms, which, under conditions favorable for their particular species, flourish and multiply greatly. Most of these organisms generate energy from the oxidation of soil organic-matter, which enables them to perform basic life functi ...
... Soil is not a sterile medium but contains large numbers of microorganisms, which, under conditions favorable for their particular species, flourish and multiply greatly. Most of these organisms generate energy from the oxidation of soil organic-matter, which enables them to perform basic life functi ...
Impact of soil fauna on the properties of soils in the humid Tropics
... controlled by those of higher organisms (e.g., nematodes and protozoa in the micro-food chain of the rhizosphere, or Collembola and Acari in litter systems dominated by the activities of the larger arthropod or earthworm). The macrofauna, in its turn, may be divided into three main functional groups ...
... controlled by those of higher organisms (e.g., nematodes and protozoa in the micro-food chain of the rhizosphere, or Collembola and Acari in litter systems dominated by the activities of the larger arthropod or earthworm). The macrofauna, in its turn, may be divided into three main functional groups ...
BioScience - Oxford Academic
... integral to the success of humankind, who have been exploiting the genetic diversity of plants and animals for over 12,000 years (Driscoll et al. 2009). Success, however, has come at a cost: As a consequence of human-driven environmental change (the Anthropocene), the Earth is now experiencing massi ...
... integral to the success of humankind, who have been exploiting the genetic diversity of plants and animals for over 12,000 years (Driscoll et al. 2009). Success, however, has come at a cost: As a consequence of human-driven environmental change (the Anthropocene), the Earth is now experiencing massi ...
Case Study
... carrots per acre versus the control field’s 65 tons per acre. Cost: The BioFlora® treated field had a cost of $389 per acre verses the control field’s $410 per acre. Nitrogen Reducon: The BioFlora® treated field received 66% less nitrogen than the control field throughout the crop cycle. Observaons: Th ...
... carrots per acre versus the control field’s 65 tons per acre. Cost: The BioFlora® treated field had a cost of $389 per acre verses the control field’s $410 per acre. Nitrogen Reducon: The BioFlora® treated field received 66% less nitrogen than the control field throughout the crop cycle. Observaons: Th ...
w_4-3 Chemistry of Nitrogen Compounds
... For the theoretical r value of 1.5, the chlorine dose is 7.6 ppm/ppm ammonia nitrogen and for the typical actual r value of 1.75, the chlorine dose is 8.9 ppm/ppm ammonia nitrogen. However, ammonia itself is typically not present in a chlorine treated pool, but rather in the form of a chloramine. If ...
... For the theoretical r value of 1.5, the chlorine dose is 7.6 ppm/ppm ammonia nitrogen and for the typical actual r value of 1.75, the chlorine dose is 8.9 ppm/ppm ammonia nitrogen. However, ammonia itself is typically not present in a chlorine treated pool, but rather in the form of a chloramine. If ...
Word - CropWatch
... Soil health is determined by examining the physical, chemical, and biological properties of soil and their interactions. The Soil Quality Test Bucket provides the tools needed to conduct tests for physical, chemical, and biological soil properties, which are indicators of soil health. Because of the ...
... Soil health is determined by examining the physical, chemical, and biological properties of soil and their interactions. The Soil Quality Test Bucket provides the tools needed to conduct tests for physical, chemical, and biological soil properties, which are indicators of soil health. Because of the ...
Salmon and Climate Change
... juveniles to enter the ocean before their planktonic food source has reached sufficiently high levels. Additional indirect effects to salmon, associated with increasing air and water temperatures, relate to negative changes to their habitat. It has been noted that areas of particularly warm freshwat ...
... juveniles to enter the ocean before their planktonic food source has reached sufficiently high levels. Additional indirect effects to salmon, associated with increasing air and water temperatures, relate to negative changes to their habitat. It has been noted that areas of particularly warm freshwat ...
Demonstrate understanding of soil formation and its effects on
... chemistry (for example, equilibrium and thermochemical principles) to interpret observations. The structure of matter. Develop an in-depth understanding of the interrelationship between human activities and the geosphere, hydrosphere, Planet Earth and Beyond: Earth systems and interacting systems. ...
... chemistry (for example, equilibrium and thermochemical principles) to interpret observations. The structure of matter. Develop an in-depth understanding of the interrelationship between human activities and the geosphere, hydrosphere, Planet Earth and Beyond: Earth systems and interacting systems. ...
Determining How Varying Severity of Forest Fragmentation Effect
... close to a structurally different environment. They can also come about from the inflow of chemicals across the edge that change environmental conditions (Murcia, 1995). When a forest is cleared, the ground becomes hotter based on its exposure to direct sunlight. Reduced canopy cover leads to increa ...
... close to a structurally different environment. They can also come about from the inflow of chemicals across the edge that change environmental conditions (Murcia, 1995). When a forest is cleared, the ground becomes hotter based on its exposure to direct sunlight. Reduced canopy cover leads to increa ...
An Analysis of Persistence, Resilience, and the Conservation of
... breakdowns. This points to the role of management in promoting ecosystem resilience because the time between breakdowns corresponds in part to periods in which an ecosystem manager has taken preventive actions to protect species from the adverse effects of continued economic activity.9 As discussed ...
... breakdowns. This points to the role of management in promoting ecosystem resilience because the time between breakdowns corresponds in part to periods in which an ecosystem manager has taken preventive actions to protect species from the adverse effects of continued economic activity.9 As discussed ...
Impacts of Neonicotinoid Insecticides on Biodiversity
... Schmuck, R. R. 1991. Ecotoxicological profile of imidacloprid. Pflanzenschutz-Nachrichten Bayer 44(2): 145-158) examined “beneficial arthropods and other beneficial species; birds and mammals; and aquatic biocoenoses.” The authors concluded that “exhaustive tests for possible ecological effects demo ...
... Schmuck, R. R. 1991. Ecotoxicological profile of imidacloprid. Pflanzenschutz-Nachrichten Bayer 44(2): 145-158) examined “beneficial arthropods and other beneficial species; birds and mammals; and aquatic biocoenoses.” The authors concluded that “exhaustive tests for possible ecological effects demo ...
Applications, Considerations, and Sources of Uncertainty When
... FIGURE 1. Theoretical biomagnification of contaminants in contrasting food webs with similar baselines and different slopes (A), and similar slopes and different baselines (B). Animals deriving greater than 70% of their biomass from carbon source 1 or carbon source 2 were separated using δ13C. Anima ...
... FIGURE 1. Theoretical biomagnification of contaminants in contrasting food webs with similar baselines and different slopes (A), and similar slopes and different baselines (B). Animals deriving greater than 70% of their biomass from carbon source 1 or carbon source 2 were separated using δ13C. Anima ...
Parent material and world soil distribution
... characterised by restricted drainage and a net accumulation of soil materials. On the y axis of each of these plots is parent material category (based on silica content) ranging from extremely siliceous at the top to ultramafic at the base. On the x axis is annual rainfall, ranging from dry on the l ...
... characterised by restricted drainage and a net accumulation of soil materials. On the y axis of each of these plots is parent material category (based on silica content) ranging from extremely siliceous at the top to ultramafic at the base. On the x axis is annual rainfall, ranging from dry on the l ...
Native Bunchgrass and Invasive Weed Establishment in Low
... Major Professor: Dr. Eugene W. Schupp Department: Wildland Resources Competition between native perennial grasses and Bromus tectorum has been studied for many years. Recently, soil nutrients have been immobilized in an effort to preferentially inhibit growth of B. tectorum relative to native specie ...
... Major Professor: Dr. Eugene W. Schupp Department: Wildland Resources Competition between native perennial grasses and Bromus tectorum has been studied for many years. Recently, soil nutrients have been immobilized in an effort to preferentially inhibit growth of B. tectorum relative to native specie ...
Perspectives of plant-associated microbes in heavy metal
... factors such as the nature of organic acids (number of carboxylic groups and their position), the binding form of the heavy metals present as well as the pH of soil solution (Jones, 1998; Ryan et al., 2001). For instance, a tricarboxylic acid, citrate binds metal ions more strongly than dicarboxylic ...
... factors such as the nature of organic acids (number of carboxylic groups and their position), the binding form of the heavy metals present as well as the pH of soil solution (Jones, 1998; Ryan et al., 2001). For instance, a tricarboxylic acid, citrate binds metal ions more strongly than dicarboxylic ...
Coccolithophores: From Extant Populations to Fossil Assemblages
... Ocean, and suggests that primary productivity and related trophic conditions might explain, in addition to sea-surface temperatures, the taxonomic composition of coccolith assemblages. This ocean-wide inference confirms previous results obtained from observations in restricted areas characterized by ...
... Ocean, and suggests that primary productivity and related trophic conditions might explain, in addition to sea-surface temperatures, the taxonomic composition of coccolith assemblages. This ocean-wide inference confirms previous results obtained from observations in restricted areas characterized by ...
Spillover of functionally important organisms between managed and
... on a variety of ecosystem functions (McCoy et al., 2009), the mechanisms that determine how different habitats affect one another are still poorly understood. Examples of interconnected habitats include the importance of resource spillover from marine environments in determining community compositio ...
... on a variety of ecosystem functions (McCoy et al., 2009), the mechanisms that determine how different habitats affect one another are still poorly understood. Examples of interconnected habitats include the importance of resource spillover from marine environments in determining community compositio ...
Response of Sagebrush Steppe Species to Elevated
... Elevated CO2 significantly increased root growth of needlegrass but not squirreltail or sagebrush (Fig. 1). Elevated CO2 did not significantly affect shoot growth. Needlegrass was the only species in which CO2 significantly affected R:S ratios. At ambient CO2, R:S ratios averaged 0.39 but were 0.55 ...
... Elevated CO2 significantly increased root growth of needlegrass but not squirreltail or sagebrush (Fig. 1). Elevated CO2 did not significantly affect shoot growth. Needlegrass was the only species in which CO2 significantly affected R:S ratios. At ambient CO2, R:S ratios averaged 0.39 but were 0.55 ...
Detritus, trophic dynamics and biodiversity
... wood, and the actions of soluble organic acids leached from decaying detritus on soil parent material and organic matter. In each case, the chemical quality of the initial input of detritus and its decomposition products, combined with physical mixing of the detritus by organisms, influence nutrient ...
... wood, and the actions of soluble organic acids leached from decaying detritus on soil parent material and organic matter. In each case, the chemical quality of the initial input of detritus and its decomposition products, combined with physical mixing of the detritus by organisms, influence nutrient ...
Seagrasses in the age of sea turtle conservation and
... critically important ecosystems that are declining at very high and accelerating rates (Waycott et al., 2009). Although most seagrass losses have been driven by poor coastal zone management that leads to increases in nutrient availability and decreases in water clarity (Short and Wyllie-Echeverria, ...
... critically important ecosystems that are declining at very high and accelerating rates (Waycott et al., 2009). Although most seagrass losses have been driven by poor coastal zone management that leads to increases in nutrient availability and decreases in water clarity (Short and Wyllie-Echeverria, ...
PP Chapter 21 Text
... found either in the atmosphere or dissolved in ocean waters. • Plants and other producers convert carbon dioxide to glucose during photosynthesis. • Carbon is returned to the environment by living organisms as carbon dioxide, a product of cellular respiration. • Because atmospheric carbon dioxide tr ...
... found either in the atmosphere or dissolved in ocean waters. • Plants and other producers convert carbon dioxide to glucose during photosynthesis. • Carbon is returned to the environment by living organisms as carbon dioxide, a product of cellular respiration. • Because atmospheric carbon dioxide tr ...
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.