It is everyones duty to do someting good to the environment around us.As middle school students, we can also do a lot of helpful things.For example, we can protect it by not throwing rubbish away.We can save water to make full use of it. We can use materials which do no harm to t...
A healthy ecosystem consists of interactions among living and non-living elements.Different species,including humans,interact with each other.Although we do not always interact directly with the natural environment,we are still part of ecosystems.We depend on resources such as sunlight,soil,water,and...
How humans and nature influence ecosystems.(reports delivered at the joint meeting of the Nature Conservancy and the Ecological Society of America)Kaiser, JocelynGallagher, Richard
How can science help to reduce the disruption of earths ecosystem by humans ?� What is the difference between ecosystem services and ecosystem functions? How does the biosphere affect the climate system? How does climate change affect the biodiversity of marine ecosystems? How do ecosystem serv...
ecosystems. Theyspread seeds that help forests grow and create pathways through dense forestsso smaller animals can move around more easily. Even their footprints, when filled with water, become homes for smaller creatures like tadpoles. This is just one-way animals help humans and the environment...
How do nutrients enter aquatic ecosystems? Define and give examples of different feeding levels in the ecosystems and Explain which feeding level is likely to include most humans? What is used by plants to extract water and nutrients from the soil? What are the main ecological roles...
根据第三段"Mathematical models have also revealed that food webs may be unstable,where small changes of top predators can lead to big effects throughout entire ecosystems. (数学模型还显示,食物网可能不稳定,顶级捕食者的微小变化可能导致整个生态系统的巨大影响。)"可知,顶级捕食者的微小变化可能导致整个...
4. How does an early-warning system help us maintain the ecological balance? A.By signaling the urgent need for taking preventive action. B.By stopping us from killing large predators. C.By bringing the broken-down ecosystems back to normal. ...
1. What have scientists discovered with the help of mathematical models of food webs? A.The living habits of species in food webs. B.The rules governing food webs of the ecosystems. C.The approaches to studying the species in the ecosystems. ...
“The main problem that we have right now is that we don’t understand how these systems work. Ecosystems are very complex. Everything interacts with everything and we don’t know what the impact is of what we do. But, with more sensors and better machine learning to build ...