Introduction part

Good morning, ladies and gentlemen. My name is Lei Ning. Today I am glad to give a presentation about plant invasion. The purpose of this presentation is to let you to understand “what is plant invasion”. I’ll try to answer all of your questions after the presentation.

Now I’ll show all of you the framework of this presentation. First of all, a brief introduction of plant invasion will be given to you. Then I will give some examples for clarifying “how the things happened”. After that recent studies will be showed. Finally I will sum up the main points.

Body part

Now, the “real” presentation begins. Firstly, I want to ask a question “how did you feel when you heard the plant invasion?” (Interaction with audience part)

General speaking, plant invasion is a secondary discipline of plant ecology. It mainly focuses on the exotic plants behaviors after introduced in a new ecosystem. Since we went into new century, with the globalization of international trade, more and more plant parts spread to the rest of the world. Because some of them quite unfriendly, plant invasion studies is valuable for a better control although most of the researches just stay in theory. Then thing happened, attention had changed to the question of “how it works?” although we wanted to solve environment problem at the beginning. Actually, plant invasion are both the process and consequence for a relative long time. For one thing, plant invasion disturb the ecosystem function (e.g. reduce biodiversity, compete other native species), it is obvious bad result. For another thing, plant invasion need relative suitable situation, and it is conditional dependence (including spatial and temporal).

For most stable and healthy ecosystem, the proportions of each species are relative stable. Each of them like defender defends invasive species from abroad. Although some natural community looks harmonious, native defender and invader had fighting each other all the time. So these belong to battles or wars in a sense.

For winning the battle, we must prepare some new weapons you never met before. The preparing process is evolution (some more details) for both. For chemical novel weapons, in the last 50 years, most of studies overwhelmingly focused on invaders’ preparation instead of their enemies.

Recently, we pay attention to the defenders’ side contrasting with previous studies for an objective and impartial view. Most all of our researches mainly go around three scientific question:

1 What weapons they use for a battle?

2 How they use those weapons?

3 Why the weapons work/not work?

(Talking something more detail….)

When we get the results, we will publish that as a paper in journal after analysis. Although one case was born from then, we need more evidences.

Actually, there are thousands of invasive and millions of native plant species. So I only want to say: we’ve only just begun.

Conclusion

So let me summarise what I’ve said.

Firstly, a brief definition has been discussed bout plant invasion for both general and scientific.

Secondly, we can see how the scientific item: using novel weapons have been proposed.

And then one example of our group recent studies has been clarified.

I therefore recommend that it is quite important to adhere to long-term research for observing plant invasive behaviors.

Many thanks for your attention. Are there any questions?