Parallel ecological networks in ecosystems
... Secondly, food web studies have often been too system specific, and we need a more general ‘template’ of functional classification of species along main axes of organization (not only trophic position) in food webs to be able to make comparisons between different ecosystems, and to study the interpl ...
... Secondly, food web studies have often been too system specific, and we need a more general ‘template’ of functional classification of species along main axes of organization (not only trophic position) in food webs to be able to make comparisons between different ecosystems, and to study the interpl ...
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... smallholder farmers due to unavailability of ready market for the legume seed (Thierfelder et al., 2012) and also due to limited access to arable land and hence find it difficult to substitute staple crops with these legumes. Maintenance of a permanent soil covers through crop residues Permanent soi ...
... smallholder farmers due to unavailability of ready market for the legume seed (Thierfelder et al., 2012) and also due to limited access to arable land and hence find it difficult to substitute staple crops with these legumes. Maintenance of a permanent soil covers through crop residues Permanent soi ...
CMN Microhabitat Fact Sheet - Far South Coast Conservation
... Habitat broadly speaking is ‘home’, where there is shelter, safety, food and water. Areas of native vegetation provide habitat for many species of fauna, but simply having trees, grass and shrubs doesn’t necessarily mean all fauna is catered for. Microhabitat refers to features that account for faun ...
... Habitat broadly speaking is ‘home’, where there is shelter, safety, food and water. Areas of native vegetation provide habitat for many species of fauna, but simply having trees, grass and shrubs doesn’t necessarily mean all fauna is catered for. Microhabitat refers to features that account for faun ...
- Centre for Biodiversity Theory and Modelling
... Secondly, food web studies have often been too system specific, and we need a more general ‘template’ of functional classification of species along main axes of organization (not only trophic position) in food webs to be able to make comparisons between different ecosystems, and to study the interpl ...
... Secondly, food web studies have often been too system specific, and we need a more general ‘template’ of functional classification of species along main axes of organization (not only trophic position) in food webs to be able to make comparisons between different ecosystems, and to study the interpl ...
Linking ecosystem and parasite ecology Michel Loreau,
... given an economic value, such as primary and secondary production, plant pollination, climate regulation, carbon sequestration, the maintenance of water quality, and the generation and maintenance of soil fertility. It is this third possibility that gave rise to the interest in biodiversity and ecos ...
... given an economic value, such as primary and secondary production, plant pollination, climate regulation, carbon sequestration, the maintenance of water quality, and the generation and maintenance of soil fertility. It is this third possibility that gave rise to the interest in biodiversity and ecos ...
Character Convergence under Competition for Nutritionally
... effects, along with a normally distributed environmental deviation, leading to a population phenotypic distribution that is approximately normal on an appropriate measurement scale (Lande 1976, 1982; Taper and Case 1992). Genetic and phenotypic variances are assumed constant (Lande 1982; Taper and C ...
... effects, along with a normally distributed environmental deviation, leading to a population phenotypic distribution that is approximately normal on an appropriate measurement scale (Lande 1976, 1982; Taper and Case 1992). Genetic and phenotypic variances are assumed constant (Lande 1982; Taper and C ...
Rodent abundance, stone bund density and its effects on crop
... implemented in the last few decades to improve crop yields, however these can have unintended consequences such as providing habitat for rodent pests. We studied rodent population dynamics and estimated crop damage in high and low stone bund density fields for four cropping seasons in Tigray highlan ...
... implemented in the last few decades to improve crop yields, however these can have unintended consequences such as providing habitat for rodent pests. We studied rodent population dynamics and estimated crop damage in high and low stone bund density fields for four cropping seasons in Tigray highlan ...
Energy Flow in Ecosy..
... Copyright © 2007 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
... Copyright © 2007 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
toward an ecological classification of soil bacteria
... Abstract. Although researchers have begun cataloging the incredible diversity of bacteria found in soil, we are largely unable to interpret this information in an ecological context, including which groups of bacteria are most abundant in different soils and why. With this study, we examined how the ...
... Abstract. Although researchers have begun cataloging the incredible diversity of bacteria found in soil, we are largely unable to interpret this information in an ecological context, including which groups of bacteria are most abundant in different soils and why. With this study, we examined how the ...
TOWARD AN ECOLOGICAL CLASSIFICATION OF SOIL BACTERIA N F ,
... Abstract. Although researchers have begun cataloging the incredible diversity of bacteria found in soil, we are largely unable to interpret this information in an ecological context, including which groups of bacteria are most abundant in different soils and why. With this study, we examined how the ...
... Abstract. Although researchers have begun cataloging the incredible diversity of bacteria found in soil, we are largely unable to interpret this information in an ecological context, including which groups of bacteria are most abundant in different soils and why. With this study, we examined how the ...
Source: HydroReview, 28, 2007 FLOW MANAGEMENT: Studying
... For the purposes of this article, “ramping rate” refers to the rate of change of water flow (in cubic meters per second per hour) and “peaking” refers to the mode of operation of a facility where water is released in accordance with electricity demand. Unrestricted ramping allows operators to adjust ...
... For the purposes of this article, “ramping rate” refers to the rate of change of water flow (in cubic meters per second per hour) and “peaking” refers to the mode of operation of a facility where water is released in accordance with electricity demand. Unrestricted ramping allows operators to adjust ...
Results of a food addition experiment in a north-central Chile
... Fulk 1975, Pearson 1975, Péfaur et al. 1979, Fuentes and Campusano 1985, Meserve and Le Boulengé 1987, Dillon and Rundel 1990, Jiménez et al. 1992, Meserve et al. 1995, Gutiérrez et al. 1997). In a sense, El Niño (and ensuing La Niña) events are natural ‘‘pulse’’ experiments that alter the rol ...
... Fulk 1975, Pearson 1975, Péfaur et al. 1979, Fuentes and Campusano 1985, Meserve and Le Boulengé 1987, Dillon and Rundel 1990, Jiménez et al. 1992, Meserve et al. 1995, Gutiérrez et al. 1997). In a sense, El Niño (and ensuing La Niña) events are natural ‘‘pulse’’ experiments that alter the rol ...
Effects of plant diversity, N fertilization, and elevated
... N pool; effects on N retention will be larger when nitrification rates are high and nitrate is abundant. Assumptions or observations about treatment effects on various intermediate factors can be used to generate predictions regarding potential effects on soil N cycles over time. For example, accord ...
... N pool; effects on N retention will be larger when nitrification rates are high and nitrate is abundant. Assumptions or observations about treatment effects on various intermediate factors can be used to generate predictions regarding potential effects on soil N cycles over time. For example, accord ...
MARELAC ` BOTANY` 3
... substrate around roots >< between trees. • Ecological roles of mangroves - soil formation by trapping debris (aerial roots!! + filamentous algae); - filter land run-off -> removing terrestrial organic matter; - habitats for many faunal species (nursery function!); - producers of detritus -> offshore ...
... substrate around roots >< between trees. • Ecological roles of mangroves - soil formation by trapping debris (aerial roots!! + filamentous algae); - filter land run-off -> removing terrestrial organic matter; - habitats for many faunal species (nursery function!); - producers of detritus -> offshore ...
Plant Species Diversity and Management of Temperate Forage and
... and white clover in northeastern grazing lands (Tracy and Sanderson, 2000); however, the dominant weedy species included quackgrass [Elytrigia repens (L.) Desv. Ex Nevski], broadleaf plantain (Plantago major L.), and dandelion (Taraxacum officinale Webber in Wiggers). The weedy species in the recent ...
... and white clover in northeastern grazing lands (Tracy and Sanderson, 2000); however, the dominant weedy species included quackgrass [Elytrigia repens (L.) Desv. Ex Nevski], broadleaf plantain (Plantago major L.), and dandelion (Taraxacum officinale Webber in Wiggers). The weedy species in the recent ...
Mediterranean-climate oak savannas: the interplay between abiotic
... livestock, brought new herbaceous species. The result of the combined processes of evolution and migration is the rich and heterogeneous assemblage of herbaceous species currently found in the dehesas (Le Houérou 1981, Marañón 1986). Savanna landscapes in Europe can be traced back to the Pleistocene ...
... livestock, brought new herbaceous species. The result of the combined processes of evolution and migration is the rich and heterogeneous assemblage of herbaceous species currently found in the dehesas (Le Houérou 1981, Marañón 1986). Savanna landscapes in Europe can be traced back to the Pleistocene ...
Elements of Ecology (8th Edition)
... Copyright © 2012, 2009, 2006 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. All rights reserved. Manufactured in the United States of America. This publication is protected by Copyright and permission should be obtained from the publisher prior to any prohibited reproduction, stor ...
... Copyright © 2012, 2009, 2006 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. All rights reserved. Manufactured in the United States of America. This publication is protected by Copyright and permission should be obtained from the publisher prior to any prohibited reproduction, stor ...
University of Groningen Holism and reductionism in biology
... when N goes to 0 (because (K - N)/K then goes to 1) but that dN/dt goes to 0 as N approaches K. Thus the logistic model describes the sigmoidal growth of a population: after an initial period of geometric growth, the growth rate decreases asymptotically to 0 as N approaches ...
... when N goes to 0 (because (K - N)/K then goes to 1) but that dN/dt goes to 0 as N approaches K. Thus the logistic model describes the sigmoidal growth of a population: after an initial period of geometric growth, the growth rate decreases asymptotically to 0 as N approaches ...
1.8 Arthropod Pest Management
... parasitic and parasitoid adaptive strategies (see descriptions below) and are “natural enemies”of agricultural pests. These “beneficial insects” may serve to effectively suppress the development of pest populations if habitat for these species is effectively managed. d) Summary: Organic growers and ...
... parasitic and parasitoid adaptive strategies (see descriptions below) and are “natural enemies”of agricultural pests. These “beneficial insects” may serve to effectively suppress the development of pest populations if habitat for these species is effectively managed. d) Summary: Organic growers and ...
Foraging efficiency of Akodon azarae under different plant cover and
... changes in energetic requirements, missed opportunity costs (according to food availability), foraging costs and/or predation risks that affect the balance between the benefits and costs of foraging in a given patch (Brown 1988). The higher food consumption in the autumn than in the spring is possib ...
... changes in energetic requirements, missed opportunity costs (according to food availability), foraging costs and/or predation risks that affect the balance between the benefits and costs of foraging in a given patch (Brown 1988). The higher food consumption in the autumn than in the spring is possib ...
Indirect Effects in - Department of Knowledge Technologies
... nontrophic interactions. It should also be noted that in nature many species are very well adapted to modify their community and habitat. ...
... nontrophic interactions. It should also be noted that in nature many species are very well adapted to modify their community and habitat. ...
Competition and evolution in virtual plant communities: a new
... trophic levels is performed by a lot of evolving agents, using simultaneously and successively mutually compatible processes that generate long or short-term usable products’’ (Dansereau 1992). Today, the study of the relations between these elements has become an important research field since it i ...
... trophic levels is performed by a lot of evolving agents, using simultaneously and successively mutually compatible processes that generate long or short-term usable products’’ (Dansereau 1992). Today, the study of the relations between these elements has become an important research field since it i ...
6. Salt Marsh Weeds - Tijuana River National Estuarine Research
... What about alkaliweed? I noticed how weedy it can be after a farmer plowed the high marsh-upland transition at San Dieguito Lagoon. Next to the remnant high marsh, the plowed field had developed a broad band of solid alkaliweed. The seeds must have been dormant in the seed bank, ready to germinate w ...
... What about alkaliweed? I noticed how weedy it can be after a farmer plowed the high marsh-upland transition at San Dieguito Lagoon. Next to the remnant high marsh, the plowed field had developed a broad band of solid alkaliweed. The seeds must have been dormant in the seed bank, ready to germinate w ...