The application of Meta analysis in the field of ecological environment

Meta analysis (Meta Analysis) is a popular statistical method for synthesizing multiple independent studies on the same topic today, and it is a quantitative literature review in a higher logical form.After the 1990s, Meta-analysis was introduced into the field of ecological environment research, and received high attention and considerable development, especially in the response of ecosystems to rising CO2 concentration, global warming, and rising O3 concentration, as well as landApplications such as harnessing the impact of change on climate change are developing rapidly.
In order to communicate and learn from each other in the design, basic theory, software operation and result interpretation of meta-analysis problems, MetaWin, a meta-analysis software specially designed for ecological environment problems, is selected to explain.This software was developed by Jessica Gurevitch, the most famous Meta-analysis master in the field of ecological environment, and others. It does not involve complex code writing. The interface is simple and the operation is convenient. It is beneficial for beginners to systematically master the basic methods of Meta-analysis in a short time..
Focus on the combination of theory and practice.In terms of theory, the selection and calculation of meta-analysis effect size, heterogeneity test, data structure, fixed-effect and random-effect models, data information acquisition and bias analysis, data filling and other knowledge are systematically sorted out.In terms of practice, combined with specific cases, the functions of MetaWin software are introduced one by one, and a comprehensive explanation of how to export and interpret the results is given.Master the basic ideas and basic steps of meta-analysis of related issues in the field of ecological environment, and have the ability to solve practical problems through step-by-step explanation and computer operation.

[Expert]: Hu Enzhu (Associate Professor), Speaking experts come from universities and research institutes in key countries, who have been applying meta-analysis methods for many years and publishedMore than 20 SCI/EI papers.He has presided over 5 longitudinal scientific research projects including the National Natural Science Foundation of China.

>>> Application of Meta analysis in the field of ecological environment

[Features]:
1. Explanation of principles in simple language; 2. Explanation of techniques and methods, providing all case data and codes;
3. Combining with project casesExplain the implementation method and connect with the actual work application;
4. Follow the school to operate on the computer, independently complete the case operation exercise, and track and analyze the whole process;
5. The exclusive student group assists in consolidating learning and practical work application exchange, withoutOnline Q&A is held regularly.

Introduction to Meta Analysis
1. Introduction to Meta Analysis
2. Status Quo and Development Trend
3, Basic ideas
4. Common software

Meta analysis case - step ①
1. Meta analysis topic selection
2. Literature dataCollection and preliminary screening
3. Establishment of database
4. Data integration

Basic theory of meta-analysis
1. Selection, calculation and transformation of effect size
2. Combined effectValue calculation and heterogeneity test
3. Unstructured data, grouped data, continuous data
4. Random effect model

Meta Analysis Case - Step ②
1. Selection and calculation of effect value
2. MergingCalculation of effect size
3. Parametric model and non-parametric model
4. Group analysis and Meta regression (univariate, bivariate)
5. Cumulative/decreasing Meta analysis
6. Model comparison (Model Building)
7. Interpretation of results

Literature bias and sampling test
1. Graphical analysis method
2. Rank correlation test method
3. Loss of safety number
4. Correction of biased results - "Trim and Fill"

Graphics
1. Forest chart
2. Funnel chart
3. Weighted histogramand Gaussian fitting
4. Normal quantile plot