Species selection is dictated by biological richness.
The selection of species indicated by the indicator of biological variety needed to consider many factors. First of all, from the perspective of sensitivity, these species are usually highly sensitive to environmental changes. For example, they might be at the top of their food intake, acquire more toxins from the environment, or find it difficult to migrate to new places when environmental conditions become unfavorable, which allows them to quickly respond to environmental changes. Secondly, in terms of ecological importance, if a species is a key species, that is, the function of the ecosystem depends on them, then any changes in the health of the species or population will be a good indicator of environmental stress factors, so such species can be selected as indicator species. Moreover, reaction speed was also an important factor. A good indicator species should respond relatively quickly to changes and be easy to observe. Its response should be representative of the entire population or ecosystem. In addition, the population size of the indicator species should be considered. The indicator species should be relatively common and have a large enough population to facilitate research. Finally, species with commercial or economic value, fast reproduction speed, large numbers, and specialized habitat or diet were also ideal candidates for biological indicator species. Species that were widely studied were also suitable as biological indicators. Read more exciting novels for free
4 indicators of biological richness
生物多样性测定主要有三个空间尺度下的多样性指数： 1. **α多样性指数**： - **Shannon - Weiner指数**：\(H = - \sum_{i = 1}^{S}P_{i}\ln P_{i}\)，其中\(P_{i}\)为属于种\(i\)的个体在全部个体中的比例，\(S\)为物种数目。 - **Pielou指数（均匀度指数）**：\(E = H/\ln S\)。 - **Simpson’s指数（优势度指数）**：\(D = 1-\sum_{i = 1}^{S}P_{i}^{2}\)，这里\(P_{i}\)为属于种\(i\)的个体在全部个体中的比例。α多样性主要关注局域均匀生境下的物种数目，也被称为生境内的多样性。 2. **β多样性指数**： - **Sorensen指数**：\(C_{s}=2c/(a + b)\)。 - **Jaccard指数**：\(C_{j}=c/(a + b - c)\)。 - **Cody指数**：\(C_{o}=g(H)+l(H)\)，其中\(a\)、\(b\)为两群落的物种数，\(c\)为两群落共有的物种数，\(g(H)\)为沿生境梯度\(H\)增加的物种数，\(l(H)\)为沿生境梯度\(H\)失去的物种数。β多样性指沿环境梯度不同生境群落之间物种组成的相异性或物种沿环境梯度的更替速率，也被称为生境间的多样性。 3. **γ多样性指数**：主要指标为物种数（\(S\)），描述区域或大陆尺度的多样性，也被称为区域多样性。 另外一种相关指数为species diversity index，它应用数理统计方法求得表示生物群落的种类和个体数量的数值，用以评价环境质量。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>
What's the difference between species richness and species evenness in comics?
In comics, species richness might be depicted by showing a wide variety of different creatures. Species evenness could be represented by showing similar numbers or importance given to different species. For example, if one species dominates the comic, it indicates low evenness. But if all species have a balanced presence, that shows higher evenness.
Paintings of the ecological environment and biological richness
In order to raise public awareness of the conservation of biological species, many paintings on the theme of biological species conservation were held. For example, the Zhengzhou City Bureau of Zoology and the Municipal Bureau of Education jointly launched a painting exhibition on the theme of conservation of biological resources. They collected works from the kindergarten and primary school in the city. Finally, more than 100 excellent works were selected from 3169 paintings and displayed in stages on the Weixin Official Accounts of "Green Zhengzhou". There was also the 2024 exhibition of paintings on the theme of the conservation of biological resources in Henan Province, sponsored by the Department of ecological environment of Henan Province and co-sponsored by the Henan Green Development Association and the Henan Science and Technology Museum. Since its opening on May 22, it had attracted many visitors. The works showed the richness and importance of biological resources in various forms. In addition, Xuchang City also had a collection of paintings on the theme of conservation. With the theme of "Colorful Biological World", primary school and kindergarten students in the city were encouraged to observe nature and draw the ideal biological world. However, the specific painting pictures needed to be obtained through the corresponding public account display, exhibition visits, or works collection channels. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Biological species is equal to species.
Biological species and species were not exactly the same. There were three levels of biological richness, namely species richness, genetic richness, and ecosystem richness. Species richness was an important component of biological richness. The term 'species diversity', which was used to describe all the biological species and their genetic variation in a certain time and region, as well as the complexity of the ecosystem, was used to describe the species-level situation, such as how many different animals, plants, and microorganisms there were in a region. In a broad sense, biological species variety could be equated to biological variety. In a narrow sense, it might focus on the number of biological species, but it was not completely equivalent to the complex meaning of species variety, because species variety also involved the relationship between species and the ecosystem. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The richness of species reflects the variety of life, right? Right? Why?
Species richness refers to the number of different species in an area. It is a way to measure the richness of life. The three aspects of biological variation were genetic variation, species variation, and ecosystem variation. Among them, species variation occupied the core position in biological variation, which reflected the richness of the biological world. The species variety was crucial to the maintenance of the ecological balance. In an ecosystem, different species were connected to each other through food chains and food webs to form a complex ecological network. The richness of species meant that the ecological network was more complex and stable. If the number of a certain species changed drastically, the rich species variety could help reduce the chain reaction to the entire ecosystem, thus stabilizing the ecosystem. At the same time, species richness provided a rich genetic resource and a basis for variation for biological evolution. Gene exchange and fusion between different species could produce new genetic variation, which was beneficial for organisms to adapt to environmental changes. The richness of species could provide more opportunities for gene exchange, which also reflected the richness of organisms. Therefore, the richness of species reflected the variety of life forms. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Do we need to count microorganisms for species richness? Why?
Species richness referred to the number of species in a community. As a large group of organisms, microorganisms needed to be considered when calculating species richness. From the point of view of biological variation, biological variation was composed of genetic (genetic) variation, species variation, and ecosystem variation. Species variation was the manifestation of biological variation on species, which could be divided into regional species variation and community species (ecological) variation. Microorganisms were widespread on Earth. Whether it was in soil, water, or other ecological environments, they occupied important niches and were an indispensable part of the composition of the community. They were of great significance in maintaining the function and stability of the ecosystem. For example, the functional variety of soil microorganisms was a study of the status of species (including microorganisms) in a certain area from the perspectives of taxology, systematic science, and biochemistry. This also indicated that microorganisms were part of the species richness statistics. Therefore, microorganisms needed to be included in the statistics of species richness so that it could reflect the biological richness of a region or community in a comprehensive and accurate manner. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The principle that proper grazing can increase biological richness
The principle of how proper grazing could increase the species 'biological richness was as follows: 1. From the perspective of food and the environment, proper grazing could make the grassland water grass more abundant, providing enough food and a suitable living environment for grass-eating creatures, thus attracting more species and increasing the variety of species. 2. From the perspective of the relationship between the predator and the prey, proper grazing meant the existence of predators (herbivores), who would eat some plants, which made room for the survival of other species to a certain extent, which in turn helped to increase the species. 3. From the perspective of grassland plant community, the response of grassland plant community species to grazing was in line with the "moderate disturbance theory", and moderate grazing disturbance (grazing intensity or years) could help maintain or even improve species species richness. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What biological characteristics does the richness of bacteria represent?
The abundance of bacteria represented the following biological characteristics: - ** Strong adaptability **: The bacteria can adapt to a variety of environmental conditions, including extreme environments such as high temperature, high pressure, strong acid, strong base, high salt, etc. Different species of bacteria had different physiological and biochemical characteristics, allowing them to survive and reproduce in a variety of environments, thus reflecting the rich variety of species. For example, some bacteria could survive near deep-sea hot springs, and some could survive in the cold environment of the polar regions. - ** Metabolic Diversity **: Numerous species of bacteria means the existence of a variety of metabolism. They could use different substances as energy and carbon sources, including organic substances (such as glucose, aa, etc.) and organic substances (such as carbon dioxide, nitrogen, hydrogen dioxide, etc.). Some bacteria were able to breathe with oxygen, some were able to breathe without oxygen, and some were able to undergo special metabolism pathways such as fermentation. This kind of metabolism reflected the multifunctionality of bacteria in the ecosystem, which was of great significance to the material cycle and energy conversion. - ** Diversity of ecological functions **: Different bacteria species play different roles in the ecosystem. For example, some bacteria were resolvers, able to decompose animal and plant remains and decompose complex organic substances into simple minerals to promote material circulation; some bacteria were symbiotic with plants, such as the symbiotic relationship between the root fungus and legume plants, which could fix nitrogen and provide nitrogen nutrition for plants; some bacteria were pathogenic bacteria, causing animal and plant diseases. - Rapid Evolution and Mutation Ability: The bacteria reproduce quickly and have a short generation time, which allows them to quickly adapt to environmental changes and produce new species. They could obtain new genes and traits through gene mutation, gene reorganization, and horizontal gene transfer, thereby increasing species variety. This ability to evolve rapidly helped bacteria survive in ever-changing environments and occupy various ecological niches. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
COP15 Kunming Conference on Biological Species
The 15th meeting of the Conference of the parties (COP15) of the United Nations Convention on Biological Species was held in Kunming. The meeting was divided into two stages. The first phase of the meeting was held on October 11 - 15, 2021 in a combination of online and offline. The theme of the conference was "ecological civilization: building a community of life on Earth", including three parts: official meetings, side events, and an exhibition. 196 parties, relevant United Nations agencies, relevant international organizations and other officials attended the conference, and it was estimated that there would be 10,000 people. In order to host the conference, Yunnan had made preparations for various work in the province, formulated relevant rules and regulations, and worked out work plans. It had initially completed the budget preparation and done a good job in logistics support. It had also implemented the concept of green, safe, and intelligent conference, and carried out work such as the construction of 5G base stations. At the high-level meeting on October 12,2021, China announced that it would invest 1.5 billion yuan to establish the Kunming Biological DiversityFund, and Japan would increase its Biological DiversityFund. On October 13, the conference adopted the Kunming Declaration, in which the parties committed themselves to developing, adopting and implementing a global framework for biological resources beyond 2020, so that biological resources could be on the road to recovery by 2030 and achieve the 2050 vision. The second phase would be held in the first half of 2022 in the form of offline meetings. On January 24,2022, due to the epidemic, the duration and organization of the second phase of COP15, which was originally scheduled to be held in the first half of that year, were pending. Finally, in December 2022, the historic "Kunming-Montreal Global Biological Diversity-related framework" and its package of decisions were reached. The conference was highly anticipated by the international community because it would determine the post-2020 global framework for biological change, set global biological change targets for 2021 - 2030, and look forward to a global biological change vision for 2050. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the selection principles of the biological reactor?
Based on context alone The selection principles of the biological reactor were mainly as follows: ** 1. Principles of Reaction Type ** 1. ** Based on the nature of the biological reaction ** - For an aerobic reaction, it was necessary to choose a biological reactor that could provide sufficient oxygen supply. For example, a stirred reactor could effectively disperse air into the reaction system through the stirring effect of the stirring paddle to meet the oxygen demand of microorganisms or cells. For the biochemical reaction, one had to choose a good sealed reactor that could prevent oxygen from entering, such as an fermentation tank. 2. ** Reaction kinetic characteristics ** - If the reaction rate is fast, a reactor with efficient mixing performance may be needed to ensure that the substances and products can be distributed evenly in the reaction system. For example, in some rapid reactions that were catalyze by some of the reagents, the micro-channel reactor could achieve rapid material transfer due to its tiny channel structure, which was beneficial to the reaction. On the contrary, if the reaction rate was slow, the stability and long-term operation ability of the biological reactor would be more important. ** 2. Principle of cell or microorganisms growth requirements ** 1. ** Cell growth characteristics ** - For cells that grow on the wall, such as some terrestrial cells, it is necessary to choose a reactor that can provide a large surface area for the cells to grow on the wall, such as a hollow fiber reactor or a microcarrier culture reactor. The hollow fibers in the hollow fiber reactor could provide a surface for the cells to attach to, and at the same time, it was convenient for the exchange of nutrients and metabolism products. The microcarriers in the microcarrier culture reactor could increase the area of cell attachment. For cells or microorganisms that grow in suspension, such as most bacteria and yeast, stirred reactors or airlift reactors can meet the requirements for growth and reproduction in suspension. 2. ** Nutrient supply and metabolism removal ** - Bioreactors must be able to ensure an adequate supply of nutrients (such as carbon sources, nitrogen sources, vitamins, etc.) needed for the growth of cells or microorganisms. For example, a perfused reactor could continuously add fresh nutrients to the reaction system while removing the metabolism products to maintain a good environment for cell growth. For reactions where the metabolism had an suppressive effect on cell growth, the timely and effective removal of the metabolism was an important consideration in selecting a biological reactor. ** 3. Principles of Scale and Cost ** 1. ** Production Scale ** - In the small-scale research stage of the laboratory, such as a few milliliters to a few hundred milliliters of reaction system, small shake flasks or micro-reactors could meet the needs. They were simple to operate and low in cost. In large-scale industrial production, such as the production of vaccine or pharmaceutical products, large-scale, highly automated reactors, such as thousand-liter or even ten-thousand-liter fermentors, were needed to meet the needs of large-scale production. 2. ** Cost-effectiveness ** - The purchase cost, operation cost (including energy consumption, medium consumption, etc.), and maintenance cost of the biological reactor had to be considered. For example, some new reactors may have better performance, but the cost of acquisition is higher. It is necessary to evaluate whether they can achieve cost-effective optimization by improving production efficiency and reducing operation and maintenance costs in the long-term operation process. ** 4. Principles of Operation and Control ** 1. ** Ease of operation ** - The operation process of the biological reactor should be simple and easy to master. For example, a single-use biological reactor did not require complicated cleaning and disinfection procedures. It could be directly discarded after use, reducing the complexity of the operation and the risk of contamination. It was suitable for some biological processes that required high operational simplicity. 2. ** Ability to control the process ** - Bioreactors that could precisely control the key parameters in the biological reaction process (such as temperature, pH value, dissolved oxygen concentration, etc.) were more conducive to the stability of the biological reaction. For example, a biological reactor with an automatic control system could monitor the temperature, pH value, and other parameters of the reaction system in real time and automatically adjust it according to the set value to ensure that the reaction was carried out under the best conditions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>