The Role of Macroinvertebrates in Stream Ecosystem Function
... because “the removal of higher trophic levels leaves lower trophic levels present (if perhaps greatly modified), whereas the removal of primary producers leaves no system at all” (77, p. 725). Despite experimental limitations, many studies have demonstrated a significant role for stream-dwelling mac ...
... because “the removal of higher trophic levels leaves lower trophic levels present (if perhaps greatly modified), whereas the removal of primary producers leaves no system at all” (77, p. 725). Despite experimental limitations, many studies have demonstrated a significant role for stream-dwelling mac ...
Anurag Agrawal - Department of Ecology and Evolutionary Biology
... Total Completed (names and dates) David Clark (2000-2002) MSc, Botany, University of Toronto Danush Viswanathan (2000-2005) PhD, Botany, University of Toronto Maria Clara Castellanos (2001-2003) PhD, Zoology, University of Toronto Eric Dunbar (2001-2003) MSc, Botany, University of Toronto Michelle G ...
... Total Completed (names and dates) David Clark (2000-2002) MSc, Botany, University of Toronto Danush Viswanathan (2000-2005) PhD, Botany, University of Toronto Maria Clara Castellanos (2001-2003) PhD, Zoology, University of Toronto Eric Dunbar (2001-2003) MSc, Botany, University of Toronto Michelle G ...
Integrated Pest Management IPM
... Columbia Pesticide Control Act,1997) Includes insects, weeds, plant pathogens, birds, non-human mammals and other organisms which pose non-medical problems to humans and non-veterinary problems to animals ...
... Columbia Pesticide Control Act,1997) Includes insects, weeds, plant pathogens, birds, non-human mammals and other organisms which pose non-medical problems to humans and non-veterinary problems to animals ...
Community structure of soil inhabiting nematodes in an apple
... trophic consumer levels within the soil food web. Therefore, their community structure can provide important insights regarding many aspects of ecosystem function [7, 8]. The assemblage of plant and soil nematode species occurring in a natural or a managed ecosystem constitutes the nematode communit ...
... trophic consumer levels within the soil food web. Therefore, their community structure can provide important insights regarding many aspects of ecosystem function [7, 8]. The assemblage of plant and soil nematode species occurring in a natural or a managed ecosystem constitutes the nematode communit ...
Long-term ecological dynamics: reciprocal
... which wildfire is varied as an experimental treatment. (d) Biodiversity gradients Several studies have used natural gradients of species diversity to infer how species extinction may affect ecosystem functioning, particularly productivity, in the long term (e.g. Wardle et al. 1997a; Troumbis & Memts ...
... which wildfire is varied as an experimental treatment. (d) Biodiversity gradients Several studies have used natural gradients of species diversity to infer how species extinction may affect ecosystem functioning, particularly productivity, in the long term (e.g. Wardle et al. 1997a; Troumbis & Memts ...
Ecology in Global Scenarios - Millennium Ecosystem Assessment
... first set of global scenarios to explore the importance of ecosystems and ecological change for human well-being while maintaining an awareness of the importance of social and economic change. There are substantial risks that ecological degradation will diminish the future well-being of humanity. Mu ...
... first set of global scenarios to explore the importance of ecosystems and ecological change for human well-being while maintaining an awareness of the importance of social and economic change. There are substantial risks that ecological degradation will diminish the future well-being of humanity. Mu ...
A European morpho-functional classification of humus forms
... leaves, needles and other plant residues more or less degraded by soil animals, mixed with animal droppings. A finely powdered and/or granular structure (less than 1 mm) is typical of the terminal stage of faunal attack in an organic horizon (Fig. 1a). At this last level of biotransformation, the ho ...
... leaves, needles and other plant residues more or less degraded by soil animals, mixed with animal droppings. A finely powdered and/or granular structure (less than 1 mm) is typical of the terminal stage of faunal attack in an organic horizon (Fig. 1a). At this last level of biotransformation, the ho ...
Today we are going to discuss a very important topic namely
... and abiotic factors in a given surrounding. And we saw who coined the term ecology, and we have also seen what the three levels are of study in ecology namely individual ecology, population ecology and community ecology. Now to study this ecosystem itself there are different levels. We are going to ...
... and abiotic factors in a given surrounding. And we saw who coined the term ecology, and we have also seen what the three levels are of study in ecology namely individual ecology, population ecology and community ecology. Now to study this ecosystem itself there are different levels. We are going to ...
Soil as a Living System
... webs can be drastically altered by the appearance or disappearance of one or a few species. In more complex systems there may be multiple ...
... webs can be drastically altered by the appearance or disappearance of one or a few species. In more complex systems there may be multiple ...
Trophic ecology of meiofauna: Francisco J.A. Nascimento
... ability of animals to rapidly rework the sediment and change the physical and chemical conditions of their habitats (Meysman et al. 2006). The community structure of benthic invertebrates is determined by several interacting factors, one of the most important being how individuals acquire nutrients. ...
... ability of animals to rapidly rework the sediment and change the physical and chemical conditions of their habitats (Meysman et al. 2006). The community structure of benthic invertebrates is determined by several interacting factors, one of the most important being how individuals acquire nutrients. ...
17 Ecological Approaches to Crop Domestication
... have maintained conspicuous defenses – manioc, which is cyanogenic, and grasspea (Lathyrus sativus L.), which contains neurotoxins – are both considered as being particularly adapted to marginal conditions where few other crops can produce viable yields (McKey and Beckerman 1993, Vaz Patto et al. 20 ...
... have maintained conspicuous defenses – manioc, which is cyanogenic, and grasspea (Lathyrus sativus L.), which contains neurotoxins – are both considered as being particularly adapted to marginal conditions where few other crops can produce viable yields (McKey and Beckerman 1993, Vaz Patto et al. 20 ...
Body-mass constraints on foraging behaviour determine population
... slow (Aljetlawi, Sparrevik & Leonardsson 2004). When consumers are large relative to their resources (high consumer–resource body-mass ratios) the capture success is low (Brose et al. 2008). Consistent with the classic pattern that ‘The food of every carnivorous animal lies therefore between certain ...
... slow (Aljetlawi, Sparrevik & Leonardsson 2004). When consumers are large relative to their resources (high consumer–resource body-mass ratios) the capture success is low (Brose et al. 2008). Consistent with the classic pattern that ‘The food of every carnivorous animal lies therefore between certain ...
photic zone
... The river continuum concept applies best to temperate river systems, and not so well to Arctic/boreal and tropical rivers, and those with high humic acids in wetlands. But it provides a basic model for the study of stream systems. Human effects on streams include pollution, sediment inputs, an ...
... The river continuum concept applies best to temperate river systems, and not so well to Arctic/boreal and tropical rivers, and those with high humic acids in wetlands. But it provides a basic model for the study of stream systems. Human effects on streams include pollution, sediment inputs, an ...
- Vision Landwirtschaft
... of illness, but the maintenance of physical, mental, social and ecological well-being. Immunity, resilience and regeneration are key characteristics of health. The role of organic agriculture, whether in farming, processing, distribution, or consumption, is to sustain and enhance the health of ecosy ...
... of illness, but the maintenance of physical, mental, social and ecological well-being. Immunity, resilience and regeneration are key characteristics of health. The role of organic agriculture, whether in farming, processing, distribution, or consumption, is to sustain and enhance the health of ecosy ...
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT)
... and its availability to support biodiversity. Physical characters consist of soils texture, soils structure, soil consistency, soils porosity, soil temperature and soil color. Chemical characters consist of soil pH, cationexchange capacity or CEC, base saturation, organic and nutrient soil content [ ...
... and its availability to support biodiversity. Physical characters consist of soils texture, soils structure, soil consistency, soils porosity, soil temperature and soil color. Chemical characters consist of soil pH, cationexchange capacity or CEC, base saturation, organic and nutrient soil content [ ...
empirical approaches to quantifying interaction intensity: competition
... Abstract. Quantitative synthesis across studies requires consistent measures of effect size among studies. In community ecology, these measures of effect size will often be some measure of the strength of interactions between taxa. However, indices of interaction strength vary greatly among both the ...
... Abstract. Quantitative synthesis across studies requires consistent measures of effect size among studies. In community ecology, these measures of effect size will often be some measure of the strength of interactions between taxa. However, indices of interaction strength vary greatly among both the ...
Soil acidity
... colloids are clays and soil organic matter of particle sizes that are within or approach colloidal dimensions. 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 als ...
... colloids are clays and soil organic matter of particle sizes that are within or approach colloidal dimensions. 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 als ...
Biological Stoichiometry: A Chemical Bridge between Ecosystem
... feed back to alter the selective regime. The work just reviewed has occurred mainly in the field of freshwater plankton ecology but has also seen increasing application in freshwater benthic ecology (Frost et al. 2002) and, as will be discussed below, is expanding into terrestrial ecology as well. T ...
... feed back to alter the selective regime. The work just reviewed has occurred mainly in the field of freshwater plankton ecology but has also seen increasing application in freshwater benthic ecology (Frost et al. 2002) and, as will be discussed below, is expanding into terrestrial ecology as well. T ...
ap biology summer assignment 2009-2010
... What the students need to do: Students should read chapters 50-55 in the Ecology Unit: Biology (7th ed.) by Campbell and Reece, and answer the objective questions below that correspond to the study of Ecology. Students should answer the questions in detail so that they will understand their response ...
... What the students need to do: Students should read chapters 50-55 in the Ecology Unit: Biology (7th ed.) by Campbell and Reece, and answer the objective questions below that correspond to the study of Ecology. Students should answer the questions in detail so that they will understand their response ...
Litchman CV - Litchman-Klausmeier Lab
... and Community Ecology of Host-Associated Microbiota, lead PI, with T. Schmidt (U Michigan) ...
... and Community Ecology of Host-Associated Microbiota, lead PI, with T. Schmidt (U Michigan) ...
What is Soil?
... Soil covers much of the land on Earth. All soils are made up of sand, silt, or clay. This describes the particle sizes, not the type of parent material it is composed of. Parent materials are the types of rocks and minerals it is derived from. Soils have other components: air, water and organic matt ...
... Soil covers much of the land on Earth. All soils are made up of sand, silt, or clay. This describes the particle sizes, not the type of parent material it is composed of. Parent materials are the types of rocks and minerals it is derived from. Soils have other components: air, water and organic matt ...
Agroecology
Agroecology is the study of ecological processes that operate in agricultural production systems. The prefix agro- refers to agriculture. Bringing ecological principles to bear in agroecosystems can suggest novel management approaches that would not otherwise be considered. The term is often used imprecisely and may refer to ""a science, a movement, [or] a practice."" Agroecologists study a variety of agroecosystems, and the field of agroecology is not associated with any one particular method of farming, whether it be organic, integrated, or conventional; intensive or extensive. Although it has much more common thinking and principles with some of the before mentioned farming systems.