Biodiversity conservation is a hot topic in today's world, and the biodiversity conservation of university campus has been paid more and more attention. It is our unshirkable responsibility as students to build green homes and schools. It is an important principle for us to maintain natural ecological stability by adjusting measures to local conditions and rationally allocating ecological species. The university campus is a place for educating people. It is very important to maintain campus biodiversity and provide a good learning environment for college students.

Biodiversity protection, ecological campus, rational allocation of campus greening

main body

I. Biodiversity

Biodiversity refers to the diversity and variability of ecological complexes on which organisms depend. Including species diversity, genetic diversity, ecosystem diversity and landscape diversity. It has economic, ecological, aesthetic and scientific value. It can not only provide us with food, medicine and other necessities and raw materials needed by industry, but also has important functions such as soil and water conservation, ecological balance and climate regulation.

In recent years, biodiversity has become one of the hot issues of global concern. It is precisely because of the education system implemented in China in recent years that the expansion has caused serious constructive damage to the city. So a hot issue has emerged: how to effectively protect the biodiversity of colleges and universities. Second, campus greening

(A) the theme of greening

Under the guidance of creating ecological gardens and enriching campus cultural life, we should create a good teaching environment for teachers and students, comprehensively consider all kinds of garden green spaces, and make overall arrangements from three aspects: landscape, ecology and culture to improve the level of campus greening.

(B) Analysis of the current situation of green space

Liaodong College is located in the Yalu River estuary wetland in Dandong, which is located in the transitional zone where the waterways on the earth's surface crisscross. It plays an important role in regulating climate, purifying environment and protecting biodiversity. It is the "kidney of nature", "biological gene bank" and "cradle of mankind". Therefore, it is precisely because of the advantages of Liaodong College that Liaodong College has beautiful scenery and is a good place for students to study and live here.

(3) Problems existing in biodiversity protection of university campus. The biodiversity in university campus should be specially protected. However, due to the staff's imperfect concept of campus greening, there are misunderstandings in greening. The following is an analysis of these misunderstandings:

Aesthetic defects are usually manifested as disharmony, deviation from nature, abandonment of tradition and so on. In practical work, there are also many contradictions with the principle of biodiversity protection, mainly as follows:

1. introduce alien species blindly.

On the one hand, due to the inadaptability of exotic species to ecological factors such as climate and geography, blind introduction of exotic species may lead to poor growth and economic losses; On the other hand, due to the proliferation of alien species, it may cause adverse consequences of alien species invasion. More seriously, these alien species may carry some germs or other harmful organisms, which may bring disaster to local species due to the lack of natural enemies.

2. Lack of planning and long-term consideration leads to disharmony between landscaping and campus landscape.

In the past, many people thought that greening was beautification, so there was always a case of "greening more than beautification"; Not only aging, lack of vitality; There are many kinds and insufficient configuration; There are more planes than three dimensions; More closed, less open; The contradiction between landscaping and campus landscape planning and biodiversity is more prominent. 3. Aestheticism is supreme, species collocation is unreasonable, and ecological benefits are poor.

In the past landscaping, planners often used to consider problems from an aesthetic point of view, lacking the necessary ecological thinking and ecological allocation concept. When building artificial vegetation, they consider it more from the aesthetic point of view, but less from the angle of ecosystem food chain and species spread, which leads to the single plant species and simple community structure in the campus, which can not effectively attract insects to pollinate, provide enough activity space and food resources for birds and other animals, and is not conducive to the expansion and reproduction of species, inhibit the invasion of harmful organisms and control the occurrence of pests and diseases, thus failing to contribute to the city. 4. Lack of consideration for the health and safety of human settlements.

Safety, ecology, humanities and art must be considered in campus greening, but the environmental effects of campus plants and their impact on human health are not fully considered in the process of landscaping.

5. Less natural vegetation, fragile artificial ecosystem and poor self-sustaining ability. Because of the extensive use of artificial vegetation, the space division is unreasonable, the self-maintenance function of campus ecosystem is poor, and the intensity of manual maintenance is high, so weeding must be done frequently. As a result, some naturally growing plants have been artificially eradicated. There are also many people who are used to burning weeds, which destroys the material cycle of campus ecosystem. 6. Natural vegetation has not been properly protected.

Due to human disturbance, some plants in the campus have rich original vegetation types, complex community structure and high biodiversity. However, because it does not conform to people's aesthetic habits, it has been transformed into artificial vegetation, and some of it has been replaced by buildings.

In addition to the above points, some campuses abandon the original greening design, like to engage in artificial lawns, and introduce a large number of exotic species, resulting in more money and poor results. On the other hand, due to the large water consumption of lawns, some trees die because of insufficient water supply, which is counterproductive to the expected effect.

(4) In view of this phenomenon, the following principles should be followed in campus greening: First, adjust measures to local conditions.

To achieve "suitable for trees in the right place, suitable for forests, and suitable for grass." Second, we must ensure that the introduced species are mainly local species. Because native plants are adaptable to the local environment, they can live in harmony with the environment and will not cause the invasion of alien species and its adverse effects. Third, we must realize ecological allocation.

According to the biological characteristics of plants, follow the principles of ecology, and make rational allocation. Fourth, we must make overall planning and coordination.

The characteristics of campus landscaping can indirectly reflect college students' understanding of nature, which is the embodiment of university spirit and university culture, and must conform to the principles of overall campus planning and biodiversity protection. At the same time of planning, the area and configuration of campus green space should conform to the actual situation of the campus, and be reasonably matched to maintain ecological stability and species diversity. Fifth, we must achieve economic, efficient and sustainable development.

Campus greening must consider its own economic conditions, long-term and continuous greening work, practical and efficient, sustainable development, and rational allocation of flowers and plants. Sixth, we must achieve ecological security and environmental friendliness.

Campus ecosystem should be closely integrated with off-campus ecosystem, and ecological security and environmental friendliness must be considered to give full play to the functions of campus beautification and ecological environment protection. (e) Strategies for protecting biodiversity on university campuses

1. On the basis of reasonable planning of campus greening laws and regulations, add new species, expand the original greening area and extend the food chain reasonably.

2. Respect nature, update management concepts, popularize environmental protection technologies, and build a green ecological campus. 3. People-oriented, give full play to the great role of college students in campus biodiversity protection. 4. Establish rules and regulations, strengthen management, and protect the biodiversity of university campus.

refer to

Yu Guangchun's talk on campus greening in colleges and universities.

Liu Yinshui's Campus Greening and Green Campus

Chen Yuetang, Gao Zhiqiang, preliminary study on ecological campus design