With the development of our society, energy in the world bees more and morelimited, so it is quite important for us to save energy and to protect ourenvironment. As a student, there are a lot of methods we can do to save energyat home. For example, first, we can turn off the light...
If a predatorHow does an ecosystem(生态系统) work? What makescan eat several species,it can survive the extinction(灭绝) ofthe populations of different species the way they are? Why areone of them. And if a predator can move on to another speciesthere so many flies and so few wolves?
T hes e actions hav e greatly affect e d th e ecological balance.Scientists hav e built an early-warning system bas e d on mathematical models. Ideally, th e sy stem woul d tell us when to adapt human activ ities that ar e pushing an ecosystem towar d a breakdown or woul d even...
Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key, scientists say, because once ecosystems pass their tipping point(临界点), it is remarkably...
How does an ecosystem(生态系统)work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats. With such ...
How does an ecosystem(生态系统)work?What makes the populations of different species the way they are?Why are there so many flies and so few wolves?To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats. With such models...
根据文章最后一段Ideally,thesystemwoul d tell us when to adapt human activities that are pu shing an ecosystem toward a breakdown or would ere n allow us to pull an ecosystem back from the border line. Prerention is key, scientists say, because once e cosystems pass their tipping point(...
How does an ecosystem(生态系统) work?What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats.With such mode...
How does an ecosystem(生态系统) work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats. With such...
How does an ecosystem(生态系统)work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats. ...