22 results about "Trophic level" patented technology

The invention provides a method and a device for identifying multi-trophic-level aquatic biocenosis stability influence factors, and relates to the technical field of aquatic ecosystem analysis. The method comprises the following steps: acquiring a water body physicochemical parameter data set and a multi-trophic-level aquatic biocenosis data set of a plurality of sampling points of a target water area; constructing a species association network system for stability calculation based on the multi-trophic-level aquatic organism community data set; calculating a stability index representing the overall stability of the community based on the network system; and finally, analyzing the contribution degree of the water physical and chemical parameter data set to the stability index by utilizing a machine learning model, and identifying the key influence factor according to the contribution degree. According to the method, the key physical and chemical factors influencing the stability of the ecological system can be systematically and accurately identified by integrating the multi-nutrition-level community structure and machine learning, and the targeting and management efficiency of the restoration of the water ecological system are improved.

The invention discloses an ecological system species evaluation method based on a food chain, and the method comprises the following steps: building an evaluation index system which takes the food chain nutrition level as a framework, and the evaluation index system comprises three first-level indexes: ecological function and nutrition level status, historical-current situation change amplitude and protection and management necessity; determining weights of the first-level indexes and subordinate second-level indexes; setting a judgment standard and an assignment rule for each secondary index; scoring the target species according to the assignment rule, and calculating a comprehensive evaluation score of the target species; and grading the target species according to the comprehensive evaluation score, and determining the target species as a key concerned species, a suggested concerned species or a general concerned species. According to the method, a multi-dimensional evaluation system taking a food chain as a core is constructed, so that the problems of one-sided view angle, disjunction of indexes and different standards in the prior art are solved, and scientific and accurate screening of ecological system species is realized.

The invention discloses a fish and shellfish polyculture experiment system and a verification method, and the system comprises at least two groups of experiment units which operate independently, an intelligent water distribution unit, a water quality on-line monitoring unit, a waste automatic collection unit and a central control unit. Wherein the experiment module comprises a fish culture area, a shellfish culture area, an adjustable mainstream circulation channel and a bypass circulation loop. The verification method comprises the steps of system initialization and experiment grouping, biological putting and feeding calibration, breeding operation under a controlled condition, multi-processing-group synchronous monitoring and sampling and data analysis and efficiency comprehensive evaluation. According to the method, the experimental platform which can accurately simulate the material circulation process of the fish-shellfish polyculture system, realize synchronous comparison of multiple treatment groups and quantitatively evaluate the nutrient interstage material coupling mechanism is constructed, and a scientific basis is provided for an ecological culture mode with low emission and high resource utilization rate.

The invention relates to the technical field of water transportation engineering, in particular to a method and system for analyzing the influence of water transportation engineering construction on the ecological integrity of a river corridor. Comprising the steps that monitoring equipment is deployed to collect hydrodynamic parameters and ecological data of a river gallery, the influence of water transportation engineering on a river gallery ecological system is evaluated based on the collected data, and the method further comprises the steps that composite hydrodynamic disturbance generated by ship navigation and ship lock dispatching is analyzed and quantified through multi-mode interference coupling; establishing a vegetative level transfer model of benthic organisms and planktons to evaluate a cascade effect of disturbance; a dynamic ecological integrity index is calculated in combination with the composite hydrodynamic disturbance and the cascade effect, and a space-time dynamic evaluation result of the ecological integrity of the river gallery is output according to the dynamic ecological integrity index; according to the method, the ecological integrity of the river gallery can be scientifically evaluated.

An integrated biofilter for a re-circulating aquaculture system is provided. The biofilter may include a moving bed biofilm reactor (MBBR) with biomedia elements configured to support bacteria growth and nitrification of the wastewater and an MBBR output configured to output biomass generated by the bacteria. The biofilter may also comprise a periphyton biofilter configured to introduce oxygen into the wastewater, and a halophyte biofilter comprising a plurality of plants. The halophyte biofilter configured to capture nutrients in the wastewater to generate edible plant mass.

The invention belongs to the technical field of ecological restoration of degraded grassland, and discloses a grass transplanting degraded grassland near-natural restoration method and application thereof, and the method comprises the following steps: investigating and diagnosing a receptor grassland in a to-be-restored area; selecting a donor grassland; cutting, and then transferring to a degraded grassland to be repaired; a heavy harrow is used for harrowing in the to-be-restored area to improve the grassland habitat of the receptor; determining the application amount of green grass; the cut green grass sections are evenly scattered on the degraded grassland area to be repaired, and then whole plants of green grass are laid on the repairing area and pressed; and starting from the reviving period of the next year, monitoring ecological restoration conditions of vegetation and soil regularly. The ecological risk possibly caused by introduction of alien species in a traditional improvement method is avoided, and the multi-nutritional-level biodiversity and the grassland ecological function of the degraded grassland are restored. The method has the advantages of low cost, quick effect and stable effect, follows the grassland ecological restoration rule, and provides an efficient, stable and sustainable near-natural solution for grassland ecological restoration.

The present invention relates to the field of marine biology technology, and specifically to a method for analyzing food residues in the gastrointestinal tract of Antarctic krill using molecular sequencing technology. The method comprises the following steps: dissecting Antarctic krill in a low-temperature environment and obtaining total DNA and total RNA using a nucleic acid extraction kit, and amplifying target genes in combination with specific primer design; subsequently, barcode labeling and high-throughput sequencing library construction are performed, paired-end sequencing is performed using an Illumina NovaSeq platform, and data quality control and redundancy removal are completed to obtain high-quality sequence data, accurate species identification is performed based on multi-level sequence alignment and a lowest common ancestor algorithm, phylogenetic tree and network analysis methods are used to analyze the diversity and trophic level distribution of Antarctic krill food residues, and food sources are further traced through environmental DNA comparison. The present invention can significantly improve the accuracy and scope of species identification and is of great significance for understanding the energy flow and trophic level structure of the Antarctic ecosystem.

The invention provides an ecological risk assessment method and device for a PFOA (perfluorooctanoic acid) polluted drainage basin, and electronic equipment, and relates to the technical field of environmental ecological risk assessment. According to a runoff period division result of a to-be-evaluated drainage basin, a biological sensitive period of multiple aquatic organisms at multiple nutrition levels in the to-be-evaluated drainage basin and toxicity data at different toxicity end points, comprehensive threshold values of all toxicity end points in different runoff periods are calculated; after the PFOA exposure concentration of each position in the to-be-evaluated drainage basin at the target moment is determined, the PFOA pollution ecological risk distribution of the to-be-evaluated drainage basin at the target moment is determined in combination with the comprehensive threshold value of the toxicity end point in the corresponding runoff period and a preset risk indication threshold value. According to the method, the runoff period and the biological sensitive period are coupled, so that the technical problem of low space-time accuracy of PFOA ecological risk assessment in an existing assessment method is solved.

The invention provides a microbial composition with a green in-situ remediation function as well as a preparation method and application thereof, and relates to the technical field of microorganisms. The microbial composition is prepared from the following components in parts by weight: 1 part of a glomus fusiformis inoculant, 0.9 to 1.1 parts of a rhizosporidium endophyllum inoculant and 0.9 to 1.1 parts of a physocheilus mosseae inoculant. The microbial composition provided by the invention can promote the growth and development of plants in micro-plastic polluted soil, promote the growth and development of food chain animals, and reduce the concentration of micro-plastics in plants and animals. The relieving effect of the microbial composition on the toxicity of the microplastics can be transmitted through a soil-plant-food chain, enrichment of the microplastics in herbivores such as snails is reduced, the toxic influence of the microplastics on the digestive system, the antioxidant system and the reproductive system of the animals is relieved, and a multi-nutritional-level ecological protection mechanism is established.

The invention provides a method, device and equipment for planning a multi-nutrition-level breeding scheme. The method for planning the multi-trophic-level culture scheme comprises the following steps: respectively constructing a prawn culture kinetic model, a sea urchin culture kinetic model, a shellfish culture kinetic model, a microalgae culture kinetic model and a kelp culture kinetic model, and integrating an overall kinetic model of a multi-trophic-level culture system according to the models; inputting an initially set breeding scheme into the overall dynamic model, and outputting a breeding result in the whole breeding period by the overall dynamic model; the breeding results comprise the daily yield, the feeding amount of various feeds every day and the nitrogen content in the water body every day; the initially set culture scheme comprises the types of cultured organisms and the initial culture quantity of each organism type; whether the breeding scheme meets a preset output index and a preset ecological index or not is evaluated according to the breeding result, and if not, the breeding scheme is adjusted.

The present invention provides a multi-level trophic level marine ecosystem simulation device and simulation method, which belongs to the field of marine ecological simulation technology. The device can simulate different marine environments such as coastal, shallow sea, lagoon, hydrothermal vent, etc. by controlling equipment parameters. The method simulates the multi-level biological nutritional structure in different ecosystems by configuring the biological species and quantity of different producers, consumers and decomposers, and combines the environment and organisms to simulate the ecosystem, restore the actual situation in the field to the greatest extent, and realize comprehensive simulation of the ecosystem; at the same time, the cooperation of various devices such as water replenishment, temperature control, circulation, light control, and monitoring can maintain the stability of the ecosystem for a long time, providing stable simulation experimental conditions for quantitative research on marine ecology such as the interaction between organisms and the environment, and also providing experimental method support for achieving carbon neutrality and biodiversity protection.

The invention relates to a dynamic monitoring and analysis system for a multi-trophic-level interaction relationship of an ecological system, and relates to the field of ecological monitoring. Multiple types of sensing terminals are integrated to communicate with the Internet of Things, and real-time and multivariate data acquisition of different nutritional level biological populations and environmental parameters is realized. The intelligent data fusion and ecological network modeling technology is adopted, the complex interaction rule between groups is deeply mined, key nodes and ecological effects are dynamically recognized, and the precision and efficiency of ecological system structure and function evaluation are improved. The system has an automatic operation and maintenance capability, and can efficiently support ecological change monitoring, health condition assessment and risk early warning. Compared with a traditional method, multi-scale, multi-dimensional and intelligent dynamic monitoring of the ecological network is realized, and scientific support is provided for ecological protection and environment management.

The invention belongs to the field of multi-nutrition-level polyculture ponds, and particularly relates to a trachinotus ovatus-penaeus monodon-blue crab multi-nutrition-level polyculture pond which comprises a pond body, a lower-layer separation net is slidably connected to the lower middle portion of the inner wall of the pond body, and an upper-layer separation net is slidably connected to the upper middle portion of the inner wall of the pond body. The lower end of the upper-layer separation net is fixedly connected with a plurality of evenly-distributed supporting legs, and the upper end of the upper-layer separation net is fixedly connected with a supporting rod. The upper-layer separation net, the lower-layer separation net, the dismounting and mounting mechanism and other structures are additionally arranged in the pond body, in the using process, the pond body can be divided into three layers for breeding through the upper-layer separation net and the lower-layer separation net, independent species can be separated, mutual predation among bred objects can be effectively avoided, and the breeding efficiency is improved. In addition, in the breeding process, the bottom of the pond body can be oxygenated through an air conveying pipe, a rotary oxygenation frame and other structures at the bottom, and oxygenation of the water body in the pond body can be more uniform.

The invention relates to an ocean engineering water area ecological health evaluation method based on a multi-trophic-level biological index, establishes a set of ecological health evaluation system for an ocean engineering construction water area, and comprises the following steps: determining a reference point and a damaged point based on an ocean comprehensive environment index; screening core sensitive biological indexes based on the multi-trophic-level candidate biological index library; and evaluating the importance of the core sensitive index based on a machine learning method, constructing a multi-trophic-level biological integrity index, and carrying out ecological health evaluation on the target water area. According to the method, the environmental complexity of the ocean engineering construction water area is effectively reflected through the ocean comprehensive environmental index, the ecological weight of the core sensitive biological index in the target environment is evaluated by utilizing the multi-trophic-level biological information and by means of a machine learning algorithm, and then the accurate and sensitive multi-trophic-level biological integrity index is constructed. Ecological health assessment of the target water area is realized.

The application provides a method, device and equipment for planning a multi-trophic aquaculture scheme. The method for planning a multi-trophic aquaculture scheme comprises the following steps: constructing a shrimp aquaculture dynamics model, a sea urchin aquaculture dynamics model, a shellfish aquaculture dynamics model, a microalgae aquaculture dynamics model and a kelp aquaculture dynamics model respectively, and integrating an overall dynamics model of a multi-trophic aquaculture system according to the above models; inputting an initially set aquaculture scheme into the overall dynamics model, and outputting an aquaculture result in an entire aquaculture period by the overall dynamics model; the aquaculture result comprises daily yield, daily feeding amount of each type of feed, and daily nitrogen content in water; the initially set aquaculture scheme comprises a biological category of aquaculture and an initial aquaculture quantity of each biological category; and whether the aquaculture scheme meets preset output indexes and preset ecological indexes is evaluated according to the aquaculture result, and the aquaculture scheme is adjusted if the aquaculture scheme does not meet the preset output indexes and the preset ecological indexes.

The invention relates to the technical field of aquaculture engineering, in particular to a modular gravity type fish-shellfish-algae multi-nutrition-level polyculture system and method.The system comprises a polyculture system support and a polyculture system netting, and the polyculture system netting is fixedly connected with the bottom of the polyculture system support; according to the invention, three-dimensional layered polyculture of fishes, shellfishes and algae is realized through the polyculture system netting, and a complete nutrition cascade relationship is constructed. Fish residual feed and excreta are filtered and utilized by middle-layer shellfish, shellfish metabolites promote growth of bottom-layer algae, algae photosynthesis increases oxygen for the system and absorbs nutrient-rich salt, and an efficient ecological cycle is formed. The culture density of each layer can be accurately regulated and controlled through cooperative monitoring of a dissolved oxygen sensor and a flow velocity meter, the material conversion efficiency of the system is improved by 30% or above, bait input is reduced by 25% compared with a traditional single culture mode, and the ammonia nitrogen content and turbidity can be reduced through the synergistic effect of algae carbon sequestration and shellfish filter feeding while polyculture is achieved.

The invention relates to a fish cadmium exposure risk early warning system based on multi-dimensional feature coupling. The fish cadmium exposure risk early warning system comprises a data input interface for receiving data of regional environment monitoring, fish biological samples and questionnaire survey; the multi-dimensional feature database is used for storing regional pollution indexes, fish nutrition-grade cadmium concentration distribution and crowd age stratification exposure parameters; and the risk assessment engine is used for constructing a cadmium element concentration prediction model based on a decision tree algorithm on the basis of the data information of the storage area pollution index, the fish nutrition-level cadmium concentration distribution and the crowd age stratification exposure parameters, predicting the cadmium element concentration of the area to be analyzed, and obtaining the data information of the predicted cadmium element concentration. According to the method, the problems of single evaluation dimension, early warning lagging and rule stiffness in the prior art are solved, the early warning precision is improved, and the comprehensiveness of data is ensured.

The invention belongs to the technical field of high-salinity aquaculture tail water treatment, and particularly provides a multi-trophic-level ecological purification system for high-salinity aquaculture tail water. Aiming at the current situations that the existing mariculture tail water is high in nitrogen and phosphorus content and high in salinity and the existing ecological treatment system is poor in purification effect, the invention provides a composite purification path with three synergistic systems of a spartina alterniflora system (nitrifying bacteria), a sea horse tooth (phosphorus-accumulating bacteria) and an ulva lactuca (algae symbiosis). According to the invention, light energy is absorbed, harmful algae are inhibited, suspended solids are physically intercepted and adsorbed, nitrogen, phosphorus, COD and heavy metal Cd in a water body environment are removed through cooperation of phosphorus-accumulating bacteria and denitrifying bacteria, the cost is reduced, and the economic income of by-products is increased.

This invention discloses a five-model growth calculation method and ecological restoration system for an ecosystem based on a unified photothermal-electric energy system, relating to the field of ecological restoration technology. The system comprises five sequentially connected and mutually coupled sub-models: a gene intrinsic layer sub-model for detecting the photothermal conductivity, absorbed heat energy, and growth time of plant genes, and calculating the growth volume of a single plant; a temporal dynamic layer sub-model for real-time detection of environmental photothermal supply, combined with phenological rhythm coefficients to calculate real-time growth potential; a vertical structure layer sub-model for detecting the growth potential and trophic level transfer efficiency of each layer of the community, and calculating the community structure efficiency; a holographic energy balance layer sub-model for detecting the total solar heat energy input and performing energy conservation balance verification; and a steady-state determination layer sub-model for calculating the ecological restoration steady-state index and determining the completion of ecological restoration when a preset threshold is reached. This invention achieves precise restoration and quantifiable determination of ecosystems, applicable to the ecological restoration of forests, wetlands, deserts, grasslands, etc.

The invention discloses a microplastic debris food chain migration monitoring method and system based on spectral analysis, and relates to the technical field of environment detection. The method comprises the following steps: dynamically analyzing a micro-plastic migration path in a debris food chain in different predation pressure gradient environments through a spectrum technology; an improved micro-plastic classification model is constructed in combination with a corn algorithm, so that the types, aging states and sources of the micro-plastics are accurately identified; quantifying the synergistic effect of the microplastic breakage rate and delta 15N isotope transfer through a two-factor coupling formula, and establishing a migration path model in combination with a graph theory algorithm; a random forest algorithm and a spatial interpolation method are combined to generate an enrichment hotspot map, and a microbial functional gene-metabolite-trophic level transfer triple monitoring mechanism is established; according to the method, the limitation of traditional single-dimensional assessment is broken through, visual tracking, multi-dimensional risk assessment and spatial precise prevention and control of the micro-plastic migration process under predation pressure are realized, and technical support is provided for micro-plastic pollution abatement of an ecological system.

This invention belongs to the field of ecological restoration technology and discloses a shellfish-algae reef for estuarine ecological restoration and fish resource conservation. The reef is composed of layered composite structural units, vertically arranged as follows: a bottom shellfish attachment zone, a middle algae growth zone, and an upper fish habitat zone. The shellfish attachment zone has a porous microtexture of 50–200 μm; the algae growth zone contains an anchoring mesh and nutrient slow-release units; and the fish habitat zone has a tubular shelter structure and an spawning substrate. The units are made of biodegradable composite materials, and their surfaces are functionalized to form a bio-attachment induction interface. Multiple units are arranged alternately or intermittently to form a flow velocity gradient region. This invention can synergistically construct multi-trophic-level biological communities, improve habitat complexity and ecosystem stability, and is suitable for estuarines affected by diversion water and with low natural transparency, significantly enhancing the effects of estuarine ecological restoration and fish resource conservation.

The invention relates to the technical field of aquaculture, and discloses a multi-nutrition-level comprehensive culture method for a stream fish fresh water pond, which comprises the following steps: firstly, constructing a pond vertical layered habitat, and putting benthic organism groups in a bottom mud deposition area; and then respectively putting scraping-feeding, intake-feeding and filter-feeding fish groups on the bottom layer, the middle layer and the upper layer of the water body. Sinking pellet feed is used in the feeding link, the settling speed is controlled through fluid mechanics, and the feed penetrates through the middle layer to be intercepted and accurately conveyed to the bottom layer. Spatio-temporal staggered fishing is carried out in the later stage of culture, middle-layer fishes are accurately removed through the acousto-optic induction and drop net technology in the first stage, and the remaining bottom-layer fishes are subjected to graded overwintering management and benthic habitat reconstruction and then fished in the second stage. According to the method, inter-species competition is solved through vertical space distribution, the fund cycle is shortened through peak shifting marketing, efficient ecological breeding of the stream fishes in the still water pond is achieved, and the self-purification capacity and economic benefits of the water body are improved.