Quantitative analysis of the local structure of food webs
Abstract. We analyze the local structure of model and empirical food webs through the statistics of three-node subgraphs. We study analytically and numerically the number of appearances of each subgraph for a simple model of food web topology, the so-called generalized cascade model, and compare them with 17 empirical community food webs from a ...
19.2: Quantifying Food Webs
Techniques for Studying Food Webs 19.2.1 19.2. 1. Food web linkages, or the feeding relationships between species inhabiting a shared ecosystem, are an ecological lens through which ecosystem structure and function can be assessed, and thus are fundamental to informing sustainable resource management.
Quantitative food web structure and ecosystem functions in a warm
Our analysis provides the first whole food web study with a robust food web structure and reasonable quantitative estimates of fluxes and ecosystem functions in a warm-temperate seagrass bed. Combining stable isotope analysis with a quantitative food web model yielded consistent energetic pattern, which provides an example of how biological ...
Quantitative Patterns in The Structure of Model and Empirical Food Webs
We perform a theoretical analysis of two recently proposed models for food webs, the niche model of R. J. Williams and N. D. Martinez and the nested-hierarchy model of M.-F. Cattin et al. We find that the two models generate distributions of numbers of prey, predators, and links that are described by the same analytical expressions.
A unifying approach for food webs, phylogeny, social networks, and
Fig. 1 depicts a simple food web. Food webs are network structures consisting of nodes, each containing one (e.g., Human) or various species (e.g., Ticks). For a trophic food web, nodes are interwoven by directed links that conventionally point from prey to predator ().Certain patterns among trophic relations suggest the clustering of nodes; the ability to unveil these patterns can facilitate ...
PDF Quantitative analysis of the local structure of food webs
Quantitative analysis of the local structure of food webs J. Camachoa,b,, D.B. Stoufferb, L.A.N. Amaralb aDepartament de Fı ´sica ... Here, in contrast, we focus on the analysis of the local structure of food webs through the study of the so-called food web subgraphs or motifs (Fig. 1). This methodology has been applied successfully to a ...
Food Web: Concept and Applications
Introduction. Food web is an important ecological concept. Basically, food web represents feeding relationships within a community (Smith and Smith 2009). It also implies the transfer of food ...
Complexity in quantitative food webs
Materials and Methods Data set. We compiled seven collections of food webs suited for quantitative analysis. These include: (a) seven detritus-based soil webs from natural and agricultural areas in Georgia and Colorado (USA), The Netherlands, and Sweden (de Ruiter et al. 1995, 1998); (b) eight invertebrate-dominated meadow webs sampled during two seasons in Switzerland (Cattin 2004); (c) eight ...
Quantifying Food Web Flows Using Linear Inverse Models
The quantitative mapping of food web flows based on empirical data is a crucial yet difficult task in ecology. The difficulty arises from the under-sampling of food webs, because most data sets are incomplete and uncertain. In this article, we review methods to quantify food web flows based on empirical data using linear inverse models (LIM). The food web in a LIM is described as a linear ...
Quantitative analysis of the local structure of food webs
Abstract. We analyze the local structure of model and empirical food webs through the statistics of three-node subgraphs. We study analytically and numerically the number of appearances of each ...
Secondary Production, Quantitative Food Webs, and Trophic ...
We might think of flow webs as a type of food web that combines the quantitative aspects of trophic-level energy flow with the species-level detail often observed in connectivity webs (e.g., Closs ...
Energetic Food Webs: An Analysis of Real and Model Ecosystems
Quantitative models of energy and elemental flow through soil food webs became possible as qualitative descriptions of soil food-web topology produced enough detail [21], allowing for a rough ...
Species diversity and food web structure jointly shape natural
Yang, Liu, Zhu et al. analyzed a dataset of 3-year parasitoid-hyperparasitoid trophic networks from 25 different agro-landscapes. Using path analysis, they uncover how species diversity and food ...
Quantitative approaches to the analysis of stable isotope food web data
Using circular statistics to quantitatively analyze stable isotope food web data, we were able to gain significant insight into patterns and changes in food web structure that were not evident from qualitative comparisons. As more ecologists incorporate a food web perspective into ecosystem analysis, these statistical tools can provide a basis ...
Quantitative food web analysis supports the energy-limitation
The severely energy-limited food webs assessed in our study, for example, essentially processed the entire detritus supply on an annual basis. Similarly, detritus availability in detritus-rich surface streams limits the productivity of both prey and predators; the latter trophic group can consume nearly all prey production in these ecosystems ...
Frontiers
The study of marine coastal food webs has a central role in the application of the integrated ecosystem approach for marine management. Changes in food webs caused by natural or anthropic drivers can lead to dramatic shifts in the overall structure and function of coastal marine ecosystems and deterioration of their services. The present review investigates the methodological approaches ...
9.4: Food Webs Overview
Food web. From Wikipedia, the free encyclopedia. Contains material from Food Web - Wikipedia and Ecological Efficiency - Wikipedia.. J. A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what ...
Quantitative Research
Quantitative Research. Quantitative research is a type of research that collects and analyzes numerical data to test hypotheses and answer research questions.This research typically involves a large sample size and uses statistical analysis to make inferences about a population based on the data collected.
Quantitative Analysis of Food Science Trends
The significance of quantitative skills in the research of food science can be evaluated by its proportion (Figure 1C) in the total food science. The proportion can be expressed by the ratio of data shown in Figure 1B and Figure 1A (= number of quantitative food science papers/number of total food science papers), which is denoted as h (x) in [Eq.
Food Webs in Caves
A fundamental goal of ecology is to understand the factors influencing spatial and temporal patterns of biodiversity. A central tool in these efforts is the quantitative and/or qualitative description of food webs (see Hall and Raffaelli 1991; Ings et al. 2009; Baiser et al. 2013).Food webs can be used to visualize how energy and materials flow through ecosystems and are complex adaptive ...
Quantitative Descriptive Analysis (QDA)
The objective of descriptive analysis is to provide quantitative descriptions of products based on the perceptions of a group of trained panellists. Over the last 40 years, many descriptive techniques have been developed, and a number of standardised methods have emerged (Gacula, 1997). However, Quantitative Descriptive Analysis (QDA) (Stone et ...
Food dyes and health: Literature quantitative research analysis
Food dyes: an overview. Food dyes are explored as follows: i) definition and role of food dyes; ii) categorization of food dyes; iii) quantitative research literature analysis. 2.1. Definition and role of food dyes. When shopping for food, the first sensory stimuli that consumers feel is color. A long time before they smell or taste the food ...
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Abstract. We analyze the local structure of model and empirical food webs through the statistics of three-node subgraphs. We study analytically and numerically the number of appearances of each subgraph for a simple model of food web topology, the so-called generalized cascade model, and compare them with 17 empirical community food webs from a ...
Techniques for Studying Food Webs 19.2.1 19.2. 1. Food web linkages, or the feeding relationships between species inhabiting a shared ecosystem, are an ecological lens through which ecosystem structure and function can be assessed, and thus are fundamental to informing sustainable resource management.
Our analysis provides the first whole food web study with a robust food web structure and reasonable quantitative estimates of fluxes and ecosystem functions in a warm-temperate seagrass bed. Combining stable isotope analysis with a quantitative food web model yielded consistent energetic pattern, which provides an example of how biological ...
We perform a theoretical analysis of two recently proposed models for food webs, the niche model of R. J. Williams and N. D. Martinez and the nested-hierarchy model of M.-F. Cattin et al. We find that the two models generate distributions of numbers of prey, predators, and links that are described by the same analytical expressions.
Fig. 1 depicts a simple food web. Food webs are network structures consisting of nodes, each containing one (e.g., Human) or various species (e.g., Ticks). For a trophic food web, nodes are interwoven by directed links that conventionally point from prey to predator ().Certain patterns among trophic relations suggest the clustering of nodes; the ability to unveil these patterns can facilitate ...
Quantitative analysis of the local structure of food webs J. Camachoa,b,, D.B. Stoufferb, L.A.N. Amaralb aDepartament de Fı ´sica ... Here, in contrast, we focus on the analysis of the local structure of food webs through the study of the so-called food web subgraphs or motifs (Fig. 1). This methodology has been applied successfully to a ...
Introduction. Food web is an important ecological concept. Basically, food web represents feeding relationships within a community (Smith and Smith 2009). It also implies the transfer of food ...
Materials and Methods Data set. We compiled seven collections of food webs suited for quantitative analysis. These include: (a) seven detritus-based soil webs from natural and agricultural areas in Georgia and Colorado (USA), The Netherlands, and Sweden (de Ruiter et al. 1995, 1998); (b) eight invertebrate-dominated meadow webs sampled during two seasons in Switzerland (Cattin 2004); (c) eight ...
The quantitative mapping of food web flows based on empirical data is a crucial yet difficult task in ecology. The difficulty arises from the under-sampling of food webs, because most data sets are incomplete and uncertain. In this article, we review methods to quantify food web flows based on empirical data using linear inverse models (LIM). The food web in a LIM is described as a linear ...
Abstract. We analyze the local structure of model and empirical food webs through the statistics of three-node subgraphs. We study analytically and numerically the number of appearances of each ...
We might think of flow webs as a type of food web that combines the quantitative aspects of trophic-level energy flow with the species-level detail often observed in connectivity webs (e.g., Closs ...
Quantitative models of energy and elemental flow through soil food webs became possible as qualitative descriptions of soil food-web topology produced enough detail [21], allowing for a rough ...
Yang, Liu, Zhu et al. analyzed a dataset of 3-year parasitoid-hyperparasitoid trophic networks from 25 different agro-landscapes. Using path analysis, they uncover how species diversity and food ...
Using circular statistics to quantitatively analyze stable isotope food web data, we were able to gain significant insight into patterns and changes in food web structure that were not evident from qualitative comparisons. As more ecologists incorporate a food web perspective into ecosystem analysis, these statistical tools can provide a basis ...
The severely energy-limited food webs assessed in our study, for example, essentially processed the entire detritus supply on an annual basis. Similarly, detritus availability in detritus-rich surface streams limits the productivity of both prey and predators; the latter trophic group can consume nearly all prey production in these ecosystems ...
The study of marine coastal food webs has a central role in the application of the integrated ecosystem approach for marine management. Changes in food webs caused by natural or anthropic drivers can lead to dramatic shifts in the overall structure and function of coastal marine ecosystems and deterioration of their services. The present review investigates the methodological approaches ...
Food web. From Wikipedia, the free encyclopedia. Contains material from Food Web - Wikipedia and Ecological Efficiency - Wikipedia.. J. A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what ...
Quantitative Research. Quantitative research is a type of research that collects and analyzes numerical data to test hypotheses and answer research questions.This research typically involves a large sample size and uses statistical analysis to make inferences about a population based on the data collected.
The significance of quantitative skills in the research of food science can be evaluated by its proportion (Figure 1C) in the total food science. The proportion can be expressed by the ratio of data shown in Figure 1B and Figure 1A (= number of quantitative food science papers/number of total food science papers), which is denoted as h (x) in [Eq.
A fundamental goal of ecology is to understand the factors influencing spatial and temporal patterns of biodiversity. A central tool in these efforts is the quantitative and/or qualitative description of food webs (see Hall and Raffaelli 1991; Ings et al. 2009; Baiser et al. 2013).Food webs can be used to visualize how energy and materials flow through ecosystems and are complex adaptive ...
The objective of descriptive analysis is to provide quantitative descriptions of products based on the perceptions of a group of trained panellists. Over the last 40 years, many descriptive techniques have been developed, and a number of standardised methods have emerged (Gacula, 1997). However, Quantitative Descriptive Analysis (QDA) (Stone et ...
Food dyes: an overview. Food dyes are explored as follows: i) definition and role of food dyes; ii) categorization of food dyes; iii) quantitative research literature analysis. 2.1. Definition and role of food dyes. When shopping for food, the first sensory stimuli that consumers feel is color. A long time before they smell or taste the food ...
Early access to new features. Access to GPT-4, GPT-4o, GPT-3.5. Up to 5x more messages for GPT-4o. Access to advanced data analysis, file uploads, vision, and web browsing