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16 results about "Food web" patented technology
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A food web (or food cycle) is the natural interconnection of food chains and a graphical representation (usually an image) of what-eats-what in an ecological community. Another name for food web is consumer-resource system. Ecologists can broadly lump all life forms into one of two categories called trophic levels: 1) the autotrophs, and 2) the heterotrophs. To maintain their bodies, grow, develop, and to reproduce, autotrophs produce organic matter from inorganic substances, including both minerals and gases such as carbon dioxide. These chemical reactions require energy, which mainly comes from the Sun and largely by photosynthesis, although a very small amount comes from bioelectrogenesis in wetlands, and mineral electron donors in hydrothermal vents and hot springs. A gradient exists between trophic levels running from complete autotrophs that obtain their sole source of carbon from the atmosphere, to mixotrophs (such as carnivorous plants) that are autotrophic organisms that partially obtain organic matter from sources other than the atmosphere, and complete heterotrophs that must feed to obtain organic matter. The linkages in a food web illustrate the feeding pathways, such as where heterotrophs obtain organic matter by feeding on autotrophs and other heterotrophs. The food web is a simplified illustration of the various methods of feeding that links an ecosystem into a unified system of exchange. There are different kinds of feeding relations that can be roughly divided into herbivory, carnivory, scavenging and parasitism. Some of the organic matter eaten by heterotrophs, such as sugars, provides energy. Autotrophs and heterotrophs come in all sizes, from microscopic to many tonnes - from cyanobacteria to giant redwoods, and from viruses and bdellovibrio to blue whales.
Aquatic food web interference simulation method aiming at water conservancy and hydropower engineering characteristics
The invention belongs to the technical field of ecological influence evaluation of water conservancy and hydropower engineering, and particularly relates to an aquatic food web interference simulation method for water conservancy and hydropower engineering characteristics. Comprising the steps of species background information acquisition, ingestion function class group classification, aquatic food web construction, aquatic food web interference attack, interference attack influence network propagation, aquatic food web network structure and function monitoring and simulation result output. Compared with an existing method, a food web disturbance attack mechanism and a chain propagation mechanism are introduced in the simulation method, the cumulative ecological response can be described, the interference characteristics of water conservancy and hydropower engineering are effectively simulated, and the engineering adaptability of disturbance simulation is enhanced.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
Artificial tidal food web sludge in-situ reduction and phosphorus recovery method based on DO-ORP coordinated regulation
PendingCN122059526AEliminate connection energy consumptionachieve couplingSpecific water treatment objectivesWater contaminantsProtozoaFood chain
The invention belongs to the technical field of sewage treatment, and discloses a DO-ORP coordinated regulation artificial tidal food web sludge in-situ reduction and phosphorus recovery method. Aiming at the problems of high energy consumption, serious phosphorus resource loss and the like of traditional sludge treatment, a multi-stage food chain consisting of microorganisms, protozoa and metazoan is implanted by constructing an artificial tidal environment with periodic alternation of wetting and drying; according to the method, the metabolic activity of sludge hydrolysis flora and phosphorus-accumulating bacteria is activated by utilizing cooperative regulation and control of DO concentration and ORP, microbial extracellular polymeric substances are triggered to be depolymerized by adopting tidal periodic oscillation, in-situ reduction of sludge biomass is realized by combining a food web cascade predation effect, and phosphorus is synchronously removed by virtue of an anaerobic phosphorus release-aerobic phosphorus uptake coupled struvite crystallization process. The method is suitable for treating the excess sludge of a municipal sewage treatment plant, and the high-purity magnesium ammonium phosphate fertilizer is produced while the dehydration energy consumption is reduced by 40%.
Owner:BEIJING NORMAL UNIVERSITY
A farmland drought evaluation method and system based on nematode food web monitoring
The present application provides a kind of farmland drought assessment method and system based on nematode food web monitoring, it is related to drought assessment technical field, the present application obtains the sample of different irrigation strategies under nematode community characteristics and actual drought grade in test field, obtains actual control set;Threshold value is set based on each nematode community characteristics drought grade judgment rule, combine the nematode community characteristics of sample constitute drought judgment set, the threshold value of each nematode community characteristics is used as optimization parameter to generate individual vector, with initial population;Based on actual control set and drought judgment set generates optimization index, based on the difference of the risk distribution of the edge of each nematode community characteristics in actual control set relative to its corresponding threshold value, improve genetic algorithm, based on the improved genetic algorithm to obtain optimal individual vector, as final farmland drought assessment rule, consider the optimization parameter of the difference of the risk distribution of the edge, the judgment accuracy of different drought grades and the stability of boundary sample can be considered.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
Method for improving quality and productivity of cultivated land by improving soil micro food web
The invention relates to the technical field of soil improvement, in particular to a method for improving the quality and productivity of cultivated land by improving a soil micro food web. According to the method, the influence of soil properties, soil quality, soil micro food webs and corn yield is studied through straw smashing and deep returning to the field and straw particle deep returning to the field, and the result shows that nematode communities are remarkably affected by different straw returning modes, fungus channels are enhanced through straw particle deep returning treatment, and the corn yield is improved. The energy flow between the fungal-feeding nematodes and the omnivorous / predatory nematodes is increased, so that the content of organic carbon and mineral combined organic carbon in soil is remarkably increased, the straw particles influence the soil nematodes by directly adjusting microbial communities, finally, the soil quality and the crop yield are improved, the soil quality is improved by 37.5% through straw particle deep-returning treatment, and the crop yield is increased by 37.5% through straw particle deep-returning treatment. And the crop yield is improved by 11%.
Owner:LIAONING ACAD OF AGRI SCI
A culture device for widespread midges and application thereof
ActiveCN118923631BIncrease abundanceReduce the chance of developing white spot diseaseClimate change adaptationAnimal husbandryDaphnia sp.Zoology
The application discloses a culture device for Mesocyclops leuckarti and application thereof, and belongs to the technical field of fish culture. The culture device for Mesocyclops leuckarti comprises a cylinder, a top cover and a bottom cover, the top cover is movably connected with the top of the cylinder, and the bottom cover is fixedly connected with the bottom of the cylinder; a collecting pipe is arranged in the cylinder, the upper portion of the collecting pipe is a silk screen, the lower portion of the collecting pipe is a closed pipe, and a first light source is arranged in the collecting pipe; a second light source and a third light source are arranged on the inner side of the cylinder, and a temperature regulator and an oxygenator are arranged on the lower portion of the inner side of the cylinder. The culture device can realize large-scale continuous high-density culture of Mesocyclops leuckarti, can be applied to preparation of a biological prevention and treatment device for fish white spot disease, can reduce the abundance of water body Paramoecium caudatum and thus reduce the probability of fish suffering from the white spot disease, can provide other food sources for the fish, is beneficial to growth and development of the fish, and enriches the aquatic food web.
Owner:GERMPLASM INNOVATION GRAND SCIENCE CENTER OF WESTERN CHINA (CHONGQING) SCIENCE CITY
Ecopath model-based food web assessment method for large water surface ecosystem
PendingCN121637985AMathematical modelsDesign optimisation/simulationStable Isotope LabelingDynamic monitoring
The invention relates to the technical field of ecological system evaluation, and discloses a large water surface ecological system food web evaluation method based on an Ecopath model, which comprises the steps of model construction and parameter functionalization: constructing a food web topological structure of an ecological system, and establishing a core balance equation based on the Ecopath model; defining at least one key process parameter in the core balance equation as a dynamic parameter response function related to an environmental factor, wherein the dynamic parameter response function comprises a response function coefficient to be solved; a data acquisition step: in the ecological system, monitoring an environmental factor corresponding to the dynamic parameter response function to obtain dynamic monitoring data of the environmental factor; meanwhile, pulse type stable isotope labeling is carried out on primary producers of the ecological system. Key process parameters in an Ecopath model are innovatively defined as dynamic parameter response functions related to environmental factors, and the fundamental limitation that a traditional model can only conduct static snapshot type evaluation is overcome.
Owner:TIANJIN FISHERIES RES INST (TIANJIN FISHERIES TECH EXTENSION STATION BOHAI SEA FISHERIES RES CENT OF CHINESE ACAD OF FISHERIES SCI)
Method for promoting growth of intercropping crops based on soil micro food web and application of method
PendingCN121942514ASpeed up the restore processImprove solubilityFabaceae cultivationCereal cultivationAgricultural scienceCalcareous soils
The invention discloses a method for promoting growth of intercropping crops based on a soil micro food web and application of the method, and belongs to the technical field of crop planting. According to the invention, it is found for the first time that by adding a specific type of bacterial-feeding nematodes into soil, synergistic improvement of growth indexes such as plant height, stem diameter and biomass of two crops can be obviously and stably promoted; the application method is simple and easy to operate, the cost is controllable, and no additional farming equipment or steps are needed; the method is high in environmental compatibility, is particularly suitable for a farmland peanut-corn intercropping system in alkaline and calcareous soil, can effectively improve the crop growth performance, farmland productivity and agricultural product yield and quality, can optimize the soil ecological function, continuously increases the economic benefits of farmers, and has wide application prospects. A brand-new, low-cost and easy-to-popularize candidate scheme is provided for agricultural green sustainable development of the alkaline soil area in North China, and the application prospect is wide.
Owner:SANYA INSTITUTE OF NANJING AGRICULTURAL UNIVERSITY
A model and method for simulating the marine environmental behavior and food web transfer of typical persistent organic pollutants
The present application belongs to the field of environmental pollution and environmental chemistry, and particularly relates to a model and method for simulating the marine environmental behavior and food web migration of typical persistent organic pollutants. The model comprises atmosphere, seawater (including suspended particles), sediment (including pore water), and a food web unit composed of multi-trophic level organisms (including plankton, benthos and fish of different diets). The present application integrates biological energy science and input parameters of aquaculture activities (such as feed delivery, residual feed loss, and fecal excretion), and constructs a multi-medium non-steady-state fate model of the aquaculture marine ecosystem. The model can accurately quantify the cross-medium flux of organic pollutants (such as PFAS, PCBs, DDTs, pesticides, etc.) between the "aquaculture source-environment-organism", realizes the quantitative tracing of the environmental contribution rate of aquaculture activities, and can predict the temporal and spatial distribution and enrichment level of pollutants in wild fish, thereby providing a scientific basis for the ecological risk management of the marine aquaculture area and the overall marine environment.
Owner:BEIJING NORMAL UNIV AT ZHUHAI +1
Composite microbial agent for promoting corn growth based on rhizosphere micro food web and application thereof
The invention discloses a compound microbial agent for promoting corn growth based on rhizosphere micro food webs and application, and belongs to the technical field of agricultural microbial agents. The invention provides a compound microorganism bacterium agent for promoting growth and yield improvement of corn based on a rhizosphere micro food web. The compound microorganism bacterium agent is composed of bacterial strains of bacillus wiedmanni JN.2, bacterial strains of Flavobacterium ginossidimutans JN.3 and bacterial strains of Rosselomyces aquimaris L-3. The invention further provides a preparation method of the compound microorganism bacterium agent for promoting the growth and yield improvement of the corn based on the rhizosphere micro food web and a preparation method of the compound microorganism bacterium agent for promoting the growth and the yield improvement of the corn based on the rhizosphere micro food web and the preparation method of the compound microorganism bacterium agent for promoting the growth and the yield improvement of the corn based on the rhizosphere micro food web. By matching with a specific cultivation mode, namely, straw returning covering and sowing zone strip cultivation, the number of rhizosphere microbial populations can be remarkably increased, a rhizosphere micro food web can be directionally regulated and controlled, the soil structure is improved, nutrient release is accelerated, effective conversion of nutrients in the micro food web and transmission of the nutrients to corn plants are promoted, and corn growth and yield improvement are promoted; the method is environment-friendly and sustainable, convenient to use, simple to operate and high in economic benefit; the requirements on green and high-quality agricultural products are met.
Owner:SANYA INSTITUTE OF NANJING AGRICULTURAL UNIVERSITY
Stream ecological simulation monitoring system and method based on multi-factor coupling
PendingCN121476556AWithdrawing sample devicesPreparing sample for investigationWater storageWater quality
The invention discloses a stream ecological simulation monitoring system and method based on multi-factor coupling, a water sample treatment part is used for simulating a climatic change core variable, a single water storage bin is downwards conducted to a plurality of sample cabins through a diversion part, and water samples in the water storage bin flow to the sample cabins under the action of self weight; the flow velocity of water entering the sample cabin can be adjusted by controlling the opening degree of the electronic switch; according to the stream ecological simulation monitoring system and method based on multi-factor coupling provided by the invention, the temporary storage cabins are arranged corresponding to the sample cabins, and the weight sensors are arranged corresponding to the temporary storage cabins, so that the functions of sample storage and water flow velocity verification are realized; through the arrangement of the three-way valve, water samples in any temporary storage cabin can be extracted when the sampling pumping part works, and the water samples in any temporary storage cabin can be emptied when the drainage pumping part works; in combination with field water quality data, nitrogen and phosphorus input gradient, temperature, flow velocity, gas exchange and the like are reproduced, the influence on the energy flow efficiency of the food web is quantitatively analyzed, and the limitation of pure correlation analysis is avoided.
Owner:INST OF AQUATIC LIFE ACAD SINICA
A method for controlling freshwater algae blooms based on food web construction
The present disclosure relates to the technical field of ecological water treatment, and particularly relates to a freshwater algae bloom regulation method based on food web construction. The regulation method comprises: performing algae phase regulation, adding effective microbial groups, functional bacterial species and beneficial algae to a target water body, converting harmful algae phases into beneficial algae phases; laying out shellfish in the target water body after the algae phase regulation is completed, purifying the water body through the shellfish, and removing the shellfish before they die; and reconstructing a submerged plant community and releasing a functional fish community in the purified target water body, so as to perfect the structure of the aquatic food web.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
A corn disease and pest comprehensive prevention and control management system based on big data
This invention discloses a big data-based integrated pest and disease management system for maize, relating to the field of ecological plant protection. It includes: a preprocessing module, which accesses and preprocesses multi-dimensional data to generate a multi-dimensional standardized field dataset; a prediction module, which generates a basic risk distribution map of field pests and diseases by fusing image recognition analysis and environmental correlation prediction analysis; a construction module, which performs fine-grained identification and classification of farmland insect communities based on the basic risk distribution map of field pests and diseases and image data from the multi-dimensional standardized field dataset, constructing a field insect food web topology; and an evaluation module, which extracts key topological feature parameters based on the field insect food web topology, evaluates and generates a health deviation index based on the baseline of feature parameters under historical health states. This invention effectively controls pests and diseases while maintaining and enhancing the long-term stability and self-sustaining capacity of the farmland ecosystem, achieving green and sustainable plant protection.
Owner:JILIN ACAD OF AGRI SCI
A method of selecting priority species and species sets for protection in conjunction with food web stability assessment
ActiveCN120508975Bimprove scienceImprove effectivenessData processing applicationsComplex mathematical operationsBiotechnologyKeystone species
This invention relates to a method for selecting priority protected species and species sets by combining food web stability assessment, comprising: acquiring species data, determining predator-prey relationships between species, and calculating trophic levels and food source ratios among species, thereby constructing a food web model; and screening priority protected species based on the directed, weighted food web model, including keystone species, umbrella species, and rare umbrella species. This invention overcomes the limitations of inconsistent screening standards and time-consuming methods for priority protected species, accurately screening priority protected species and species sets, thereby achieving a "point-to-line, line-to-area" protection effect and significantly improving the effectiveness of wildlife conservation.
Owner:NORTHEAST FORESTRY UNIV +1
Methods and Systems for Insect Species Identification in Green Manure Orchards Based on eDNA
This invention relates to the field of biological gene detection technology, and proposes a method and system for insect species identification in green manure orchards based on eDNA. The method includes: collecting eDNA information from several collection points in the green manure orchard over a period of time, and obtaining several orchard DNA sequences at several times from each collection point; obtaining the gene sequence similarity between each orchard DNA sequence and the DNA sequences of each species, screening to obtain several suspected and known species in the green manure orchard, and constructing a food web in the green manure orchard; obtaining the corresponding currently analyzed insect node in the food web for suspected insect species; obtaining the energy flow matching degree of the currently analyzed insect node at the current time period; obtaining the insect category assessment degree of the suspected insect species at the current time period; and determining the insect identification indicators for each suspected insect species, thereby identifying the insect species in the green manure orchard. This invention aims to solve the problem of the impact of the existence of the food web in green manure orchards on the accuracy of insect species identification.
Owner:INST OF PLANT PROTECTION GANSU ACAD OF AGRI SCI
Method and device for determining suitable ecological flow target during ice sealing period, equipment and medium
This invention discloses a method, apparatus, equipment, and medium for determining suitable ecological flow targets during ice-covered periods. The method includes: determining multiple food web functional groups corresponding to the target river section based on all measured species in the target river section; constructing a water-ecological food web coupling model based on each food web functional group, as well as initial values of water quality indicators, initial values of aquatic biomass, hydrological characteristic parameters, and dynamic load values of the target river section within a preset simulation period; using the water-ecological food web coupling model to determine food web attribute indicators of the target river section under predefined ecological flow targets for each ice-covered period; and determining the suitable ecological flow target for the target river section during ice-covered periods based on the food web attribute indicators of the target river section under each ecological flow target for each ice-covered period. This method considers the overall impact of ice-covered period flow changes on the river ecosystem, enabling the determined suitable ecological flow target for ice-covered periods to achieve a scientific balance between water resource protection and ecological restoration benefits.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
A method for evaluating lake ecological network resilience based on adaptive food web model
This invention discloses a method for assessing the resilience of lake ecological networks based on an adaptive food web model. The method includes: acquiring time-series data of organisms in the target lake over the years to obtain preprocessed time-series data; extracting time-series area data of submerged plants in the target lake; constructing an adaptive food web model subjected to combined disturbances of water level amplitude and human fishing based on the preprocessed time-series data and the area time-series data; estimating the model parameters of the adaptive food web model using the Markov chain Monte Carlo method to obtain the optimal values of the model parameters; constructing a time-varying Jacobian matrix based on the adaptive food web model with the optimal model parameter values; calculating the maximum Lyapunov exponent under the interaction of different water level amplitude coefficients and human fishing intensities to identify the water level amplitude threshold and human fishing intensity threshold that lead to steady-state abrupt changes, providing a scientific basis for water level regulation and fisheries management optimization.
Owner:JIANGXI NORMAL UNIV