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 ...
Recent research with inoculants and N fertilizers for field pea has
... maximize pea seed yield when soil test P levels (Modified Kelowna extractable-P) were less than 30 kg P ha-1. Similarly, Karamanos et al. (2003) tested five rates (0, 6.5, 13, 19.5 and 26 kg P ha1 ) at 13 sites in Alberta, and found a significant response of field pea to P application at sites where ...
... maximize pea seed yield when soil test P levels (Modified Kelowna extractable-P) were less than 30 kg P ha-1. Similarly, Karamanos et al. (2003) tested five rates (0, 6.5, 13, 19.5 and 26 kg P ha1 ) at 13 sites in Alberta, and found a significant response of field pea to P application at sites where ...
Vegetation dynamics and community assembly in post
... mechanisms is a challenging but integral part of ecological studies and conservation planning. Ecological theory proposes that biotic, abiotic and stochastic factors act as “ecological filters” to determine the assembly and structure of local communities. The functional strategies of the species in ...
... mechanisms is a challenging but integral part of ecological studies and conservation planning. Ecological theory proposes that biotic, abiotic and stochastic factors act as “ecological filters” to determine the assembly and structure of local communities. The functional strategies of the species in ...
File - PHOENIX Biology!
... A pyramid of energy indicates the amount of energy available to each trophic level. In the energy pyramid below, notice that about 90 percent of the available energy is used by the organisms at each level. Some of the energy is used for cellular processes. Some is released into the environment as he ...
... A pyramid of energy indicates the amount of energy available to each trophic level. In the energy pyramid below, notice that about 90 percent of the available energy is used by the organisms at each level. Some of the energy is used for cellular processes. Some is released into the environment as he ...
Understanding Nutrients: Phosphorus Cycle
... once again, become available for plants to repeat the cycle. The recycling of phosphorus (as phosphate) is slow because no biologically important form of phosphorus is gaseous. Phosphates that become part of marine sediments may take millions of years to solidify into rock, uplift as mountains, and ...
... once again, become available for plants to repeat the cycle. The recycling of phosphorus (as phosphate) is slow because no biologically important form of phosphorus is gaseous. Phosphates that become part of marine sediments may take millions of years to solidify into rock, uplift as mountains, and ...
Biodiversity and the functioning of seagrass ecosystems
... taxa, and ecological assemblages vary in composition from guilds or functional groups, through communities, to landscapes. This variation is of interest in understanding ecosystem functioning insofar as it provides a proxy for variation in traits important to processes such as growth, production, an ...
... taxa, and ecological assemblages vary in composition from guilds or functional groups, through communities, to landscapes. This variation is of interest in understanding ecosystem functioning insofar as it provides a proxy for variation in traits important to processes such as growth, production, an ...
Ecosystems - Oxford University Press
... sustainable management practices can help ensure minimal native habitat is cleared and the negative outcomes of natural events, such as bushfires, can be reduced. Students: »» explain the development of strategies for managing natural events in Australian ecosystems »» describe the contribution of s ...
... sustainable management practices can help ensure minimal native habitat is cleared and the negative outcomes of natural events, such as bushfires, can be reduced. Students: »» explain the development of strategies for managing natural events in Australian ecosystems »» describe the contribution of s ...
Integrating Different Organizational Levels in Benthic Biodiversity
... the invasion of exotic species (Grosholz, 2002). The all-encompassing climate change presents additional environmental challenges. Ecological processes are put at stake due to the loss of species and changes in community patterns, because they depend on the integrity and continuity of communities an ...
... the invasion of exotic species (Grosholz, 2002). The all-encompassing climate change presents additional environmental challenges. Ecological processes are put at stake due to the loss of species and changes in community patterns, because they depend on the integrity and continuity of communities an ...
SHELLFISH AQUACULTURE - In Praise of Sustainable Economies
... reducing turbidity and both directly and indirectly remove nitrogen and other nutrients. Via this process, these highly efficient water purifiers remove or reduce organic matter, nutrients, silt, bacteria and viruses, and improve clarity and light transmission which can, in turn, improve survival of ...
... reducing turbidity and both directly and indirectly remove nitrogen and other nutrients. Via this process, these highly efficient water purifiers remove or reduce organic matter, nutrients, silt, bacteria and viruses, and improve clarity and light transmission which can, in turn, improve survival of ...
Predicting Changes in Community Composition and Ecosystem
... such as biogeochemical cycling or propensity to disturbance, remains rudimentary. 2. We present a framework using concepts and results from community ecology, ecosystem ecology and evolutionary biology to provide this linkage. Ecosystem functioning is the end result of the operation of multiple envi ...
... such as biogeochemical cycling or propensity to disturbance, remains rudimentary. 2. We present a framework using concepts and results from community ecology, ecosystem ecology and evolutionary biology to provide this linkage. Ecosystem functioning is the end result of the operation of multiple envi ...
Climate change, hurricanes and - Global Raptor Information Network
... intensity, timing, and distribution of hurricanes and tropical storms. The magnitude of these projected physical changes and their subsequent impacts on coastal wetlands will vary regionally. Coastal wetlands in the southeastern United States have naturally evolved under a regime of rising sea level ...
... intensity, timing, and distribution of hurricanes and tropical storms. The magnitude of these projected physical changes and their subsequent impacts on coastal wetlands will vary regionally. Coastal wetlands in the southeastern United States have naturally evolved under a regime of rising sea level ...
A future initiative for the Folger Passage Node
... Adult Thysanoessa spinifera biomass, 1991-2009 ...
... Adult Thysanoessa spinifera biomass, 1991-2009 ...
Summary
... 2) The trajectory of assembly of the Sarracenia food web is independent of initial starting composition, habitat type, and the type of, and rate at which, nutrients are supplied; 3) Host plant growth morphology is independent of food web structure and nutrient supply. In field “pulse” experiments, b ...
... 2) The trajectory of assembly of the Sarracenia food web is independent of initial starting composition, habitat type, and the type of, and rate at which, nutrients are supplied; 3) Host plant growth morphology is independent of food web structure and nutrient supply. In field “pulse” experiments, b ...
ORH 1009 Soil, Water, Plant Relationships
... Definition of a Soil • A collection of naturally occurring, dynamic, three dimensional bodies on the earth’s surface. • Consist of the upper physical, chemical, and biological portion of the earth’s crust. • It contains living matter and is capable of, or has been capable of supporting plant growth ...
... Definition of a Soil • A collection of naturally occurring, dynamic, three dimensional bodies on the earth’s surface. • Consist of the upper physical, chemical, and biological portion of the earth’s crust. • It contains living matter and is capable of, or has been capable of supporting plant growth ...
Crowder et al. 2008 - Duke People
... While traditional management of marine fisheries has focused on the widespread declines in targeted species, entire food webs have been significantly altered by overfishing ( Jackson et al. 2001, Christensen et al. 2003). Fishing has a variety of direct and indirect effects on food webs in marine ec ...
... While traditional management of marine fisheries has focused on the widespread declines in targeted species, entire food webs have been significantly altered by overfishing ( Jackson et al. 2001, Christensen et al. 2003). Fishing has a variety of direct and indirect effects on food webs in marine ec ...
soil preservation and conservation97 2011
... cations (preventing them from leaching out of the soil) Acidic soil has a reduced ability to bind positively charged ions to it (cation exchange ). Mineral ions such as potassium (K+) are readily leached out. The optimum pH for soil is 6.0 – 7.0 because most nutrient mineral needed by plants are ...
... cations (preventing them from leaching out of the soil) Acidic soil has a reduced ability to bind positively charged ions to it (cation exchange ). Mineral ions such as potassium (K+) are readily leached out. The optimum pH for soil is 6.0 – 7.0 because most nutrient mineral needed by plants are ...
Plankton, Nekton
... By Life History (meroplankton vs. holoplankton) By Taxonomy (Crustaceous vs. Gelatinous zooplankton, for example) ...
... By Life History (meroplankton vs. holoplankton) By Taxonomy (Crustaceous vs. Gelatinous zooplankton, for example) ...
NITROGEN LIMITATION AND TROPHIC VS. ABIOTIC INFLUENCES ON M E. R
... Finally, abiotic conditions also may be important for grasshoppers, because years with below-average temperature and/or above-average precipitation can inhibit their productivity. Cool, wet conditions are often associated with retarded development (Scharff 1954, Dempster 1963, Gage and Mukerji 1977, ...
... Finally, abiotic conditions also may be important for grasshoppers, because years with below-average temperature and/or above-average precipitation can inhibit their productivity. Cool, wet conditions are often associated with retarded development (Scharff 1954, Dempster 1963, Gage and Mukerji 1977, ...
Stachowicz Annual Reviews - Virginia Institute of Marine Science
... probability of including a species with a particular trait (e.g., high productivity) in an assemblage as species richness increases, and (b) the species with highest function in monoculture is also the dominant competitor in a mixed species assemblage (Huston 1997, Tilman et al. 1997). When multiple ...
... probability of including a species with a particular trait (e.g., high productivity) in an assemblage as species richness increases, and (b) the species with highest function in monoculture is also the dominant competitor in a mixed species assemblage (Huston 1997, Tilman et al. 1997). When multiple ...
Biodiversity of Rangelands - Society For Range Management
... gaps in the plant community, making light, moisture and nutrients more available. ...
... gaps in the plant community, making light, moisture and nutrients more available. ...
Ecological Succession - Galena Park ISD Moodle
... It is the process by which an area that is completely bare of any vegetation could eventually become a forest. Next > ...
... It is the process by which an area that is completely bare of any vegetation could eventually become a forest. Next > ...
Soil acidity
... Colloids have properties that are important in soil chemistry, such as the ability to adsorb cations because most soil colloids carry negative charges on them. Because of this, they are also referred to as polyanions. Soil colloids are also called micelles. Soil Solution The water in the soil is ref ...
... Colloids have properties that are important in soil chemistry, such as the ability to adsorb cations because most soil colloids carry negative charges on them. Because of this, they are also referred to as polyanions. Soil colloids are also called micelles. Soil Solution The water in the soil is ref ...
Lecture 19, April 5, 2017 - EPSc 413 Introduction to Soil Science
... – Different soil types dominate different climate zones, but there are always exceptions ...
... – Different soil types dominate different climate zones, but there are always exceptions ...
File
... The greenhouse effect is the natural phenomenon in which certain gases in the atmosphere, such as carbon dioxide and water vapor, absorb heat and reflect it back onto Earth, resulting in the warming of Earth. This effect is intensified by increased concentrations of the greenhouse gases in the atmos ...
... The greenhouse effect is the natural phenomenon in which certain gases in the atmosphere, such as carbon dioxide and water vapor, absorb heat and reflect it back onto Earth, resulting in the warming of Earth. This effect is intensified by increased concentrations of the greenhouse gases in the atmos ...
Temporal stability in forest productivity increases with tree diversity
... species richness (McGrady-Steed et al. 1997). In other words, is the productivity of a community more predictable when richness increases? If so, biodiversity would ‘insure’ ecosystems against a decline in their functioning because more species provide a higher guarantee that some will maintain func ...
... species richness (McGrady-Steed et al. 1997). In other words, is the productivity of a community more predictable when richness increases? If so, biodiversity would ‘insure’ ecosystems against a decline in their functioning because more species provide a higher guarantee that some will maintain func ...
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.