15 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 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 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 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.

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.

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.