L E T T E R
... adding variables to determine the significant factors in multiple regression. In most cases, there was only one significant factor in a model, and there were never more than two significant factors in multiple regression. We did not formally evaluate the statistical significance of differences in se ...
... adding variables to determine the significant factors in multiple regression. In most cases, there was only one significant factor in a model, and there were never more than two significant factors in multiple regression. We did not formally evaluate the statistical significance of differences in se ...
Earth Science: 5.2 Soil - sleepingdogstudios.com
... The slope of land can vary greatly in a short distance. This variation can result in many types of soils. Many of these differences are related to the amount of erosion and the water content of the soil. ...
... The slope of land can vary greatly in a short distance. This variation can result in many types of soils. Many of these differences are related to the amount of erosion and the water content of the soil. ...
The Effects of Tillage on Soil Water Content in Dry Areas
... fertilizers in the region plays a major role in the widespread absence. It also triggered soil erosion and soil fertility decline is caused. Calcium, magnesium, phosphate, and potassium contents of soil are observed to be higher. In the same way, calcium and magnesium salts, clays combine with chemi ...
... fertilizers in the region plays a major role in the widespread absence. It also triggered soil erosion and soil fertility decline is caused. Calcium, magnesium, phosphate, and potassium contents of soil are observed to be higher. In the same way, calcium and magnesium salts, clays combine with chemi ...
1 soil strategy for england supporting evidence paper
... on arable and upland field sites was assessed shortly after one of the wettest periods in England and Wales since records began in 1766 and compared with data from previous surveys of the same sites 37 . The project concluded that the impacts of climate change on soil erosion were likely to be compl ...
... on arable and upland field sites was assessed shortly after one of the wettest periods in England and Wales since records began in 1766 and compared with data from previous surveys of the same sites 37 . The project concluded that the impacts of climate change on soil erosion were likely to be compl ...
Ecological effects of invasive alien insects
... the analyses the effect of alien species on other alien species, unless this effect had an indirect consequence on native biodiversity. Papers were classified following the biological organisation level at which the investigated effects occur (genetic, population/community, and ecosystem) and based ...
... the analyses the effect of alien species on other alien species, unless this effect had an indirect consequence on native biodiversity. Papers were classified following the biological organisation level at which the investigated effects occur (genetic, population/community, and ecosystem) and based ...
Trophic complementarity drives the biodiversityecosystem
... predict the impact of trophic structure on ecosystem functioning (Thompson et al. 2012). Because several aspects of network structure (e.g. trophic niche overlap) can be related to the key concept of functional complementarity/redundancy, we argue that the results of classical BEF analysis in a sing ...
... predict the impact of trophic structure on ecosystem functioning (Thompson et al. 2012). Because several aspects of network structure (e.g. trophic niche overlap) can be related to the key concept of functional complementarity/redundancy, we argue that the results of classical BEF analysis in a sing ...
How can organic matter improve soil- based ecosystem
... and to contribute to achieving the longterm objective of limiting the temperature increase to +1,5/2°C.” ...
... and to contribute to achieving the longterm objective of limiting the temperature increase to +1,5/2°C.” ...
English - IUCN Red List of Ecosystems
... Keith et al. (2013). Scientific foundations for an IUCN Red List of Ecosystems. PLoS ONE Supplementary material doi:10.1371/journal.pone.0062111.s002 a) 1990 ...
... Keith et al. (2013). Scientific foundations for an IUCN Red List of Ecosystems. PLoS ONE Supplementary material doi:10.1371/journal.pone.0062111.s002 a) 1990 ...
TOS - Laboratory for Microbial Oceanography
... The concept of the marine food chain—wherein small phytoplankton cells capture solar energy and use nutrients like phosphorus and nitrogen to build new biomass that is subsequently consumed in a stepwise series of transfers to larger and larger animals—was developed more than a century ago. Its ori ...
... The concept of the marine food chain—wherein small phytoplankton cells capture solar energy and use nutrients like phosphorus and nitrogen to build new biomass that is subsequently consumed in a stepwise series of transfers to larger and larger animals—was developed more than a century ago. Its ori ...
The Biolog Plates Technique as a Tool in Ecological Studies of
... between microbial communities from various environments and habitats. The rate of colour development in wells provides information about density and/or metabolic activity of bacterial cells in an inoculum, while the diversity of colour development in wells about microbial diversity in soil solution ...
... between microbial communities from various environments and habitats. The rate of colour development in wells provides information about density and/or metabolic activity of bacterial cells in an inoculum, while the diversity of colour development in wells about microbial diversity in soil solution ...
Hypotheses on the role of the protistan rare biosphere in a changing
... highly effective dispersal of microbes thwart or dampen the outcome of resource competition, predator–prey relationships and other interactions among microbes. No matter how superior, competitive dominants probably never completely eliminate competitively inferior protistan taxa. Rare species capabl ...
... highly effective dispersal of microbes thwart or dampen the outcome of resource competition, predator–prey relationships and other interactions among microbes. No matter how superior, competitive dominants probably never completely eliminate competitively inferior protistan taxa. Rare species capabl ...
insecticide residues in soils and in root crops grown on treated soils
... que los otros cultivos, el nivel encontrado alm en ~ste caso estuvo por debajo de 10 aceptabl& cmTto Irmite (It' tolerancia, que es de 8 ppm. INTRO 0 UCTION ...
... que los otros cultivos, el nivel encontrado alm en ~ste caso estuvo por debajo de 10 aceptabl& cmTto Irmite (It' tolerancia, que es de 8 ppm. INTRO 0 UCTION ...
University of Groningen Ecology of Estuarine Macrobenthos
... production and returns nutrients to the deeper water layers. It may take years before these nutrients can be utilized by photoautotrophs again. In estuarine systems, however, pelagic-benthic links are not only quantitatively more important, but also qualitatively different, since the benthos can be ...
... production and returns nutrients to the deeper water layers. It may take years before these nutrients can be utilized by photoautotrophs again. In estuarine systems, however, pelagic-benthic links are not only quantitatively more important, but also qualitatively different, since the benthos can be ...
An empirical model for the prediction of secondary production in
... and less variable than longevity. The only other attempt to find patterns in the production of marine invertebrates is that of Brey (1990), who considered 2 fundamental population parameters: mean annual biomass (B) and mean individual body mass (W). Brey found that production varies as: l o g P = - ...
... and less variable than longevity. The only other attempt to find patterns in the production of marine invertebrates is that of Brey (1990), who considered 2 fundamental population parameters: mean annual biomass (B) and mean individual body mass (W). Brey found that production varies as: l o g P = - ...
Phenology - URPP Global Change and Biodiversity
... The technological and methodological advancements in environmental remote sensing have opened a new avenue for phenological research (White et al., 2009). The field of Land Surface Phenology (LSP) has been defined as the study of seasonal patte ...
... The technological and methodological advancements in environmental remote sensing have opened a new avenue for phenological research (White et al., 2009). The field of Land Surface Phenology (LSP) has been defined as the study of seasonal patte ...
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... between the primary producers and the consumers in an ecosystem. They are also known as decomposers because of their role in decomposition of dead organic matter. Detritivores decompose the organic material in an ecosystem and transfer the chemical elements in inorganic forms to abiotic reservoirs s ...
... between the primary producers and the consumers in an ecosystem. They are also known as decomposers because of their role in decomposition of dead organic matter. Detritivores decompose the organic material in an ecosystem and transfer the chemical elements in inorganic forms to abiotic reservoirs s ...
Stability and complexity : a reappraisal of the Competitive Exclusion
... equalize, and that given the chance to do so the system may stabilize. Disputing the claim ...
... equalize, and that given the chance to do so the system may stabilize. Disputing the claim ...
PART V
... HNO3 NO3- + H+ 7. Plant Uptake of Cations Plants exude H+ ions or take up anions (eg. SO42-) to balance off cation uptake ...
... HNO3 NO3- + H+ 7. Plant Uptake of Cations Plants exude H+ ions or take up anions (eg. SO42-) to balance off cation uptake ...
Trophic structure and interactions in Lake Ayamé \(Côte d`Ivoire\)
... The group-specific omnivory index (OI) is computed as the variance of the TLs of each predator’s prey groups (Christensen and Pauly, 1993) while the system omnivory index (SOI) is computed as the average omnivory index of all consumers weighted by the logarithm of each consumer's food intake, Q (Chr ...
... The group-specific omnivory index (OI) is computed as the variance of the TLs of each predator’s prey groups (Christensen and Pauly, 1993) while the system omnivory index (SOI) is computed as the average omnivory index of all consumers weighted by the logarithm of each consumer's food intake, Q (Chr ...
The biogeography of marine plankton traits
... speciation of dissolved inorganic C (see Box 1 for overview of ...
... speciation of dissolved inorganic C (see Box 1 for overview of ...
Journal of Arid Environments
... molecular methods remain the most realistic approach to carry out diversity and population structure studies on AM fungi. These methodological approaches have been used to analyze the AM fungal communities actually colonizing key species in different ecosystems all over the world (Öpik et al., 2006) ...
... molecular methods remain the most realistic approach to carry out diversity and population structure studies on AM fungi. These methodological approaches have been used to analyze the AM fungal communities actually colonizing key species in different ecosystems all over the world (Öpik et al., 2006) ...
SED221 - National Open University of Nigeria
... This unit focuses on ecology, environmental Biology that deals with the systematic study of how organisms interact with one another and with their physical and chemical environment. Ecological interactions start within and between populations and they extend on through communities, ecosystem and the ...
... This unit focuses on ecology, environmental Biology that deals with the systematic study of how organisms interact with one another and with their physical and chemical environment. Ecological interactions start within and between populations and they extend on through communities, ecosystem and the ...
Lesson Overview
... Over time, 7. lichens convert, or fix, atmospheric nitrogen into useful forms for other organisms, break down rock, and add organic ...
... Over time, 7. lichens convert, or fix, atmospheric nitrogen into useful forms for other organisms, break down rock, and add organic ...
Is the role of trophic control larger in a stressed ecosystem?
... Earlier, we have shown that a higher average positional keystone index of trophic components leads to less reliable energy flows through a food web (Jordán and Molnár 1999, Jordán et al. 1999). This means that the food supply of higher consumers is more secure if points in the flow network are of si ...
... Earlier, we have shown that a higher average positional keystone index of trophic components leads to less reliable energy flows through a food web (Jordán and Molnár 1999, Jordán et al. 1999). This means that the food supply of higher consumers is more secure if points in the flow network are of si ...
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.