Food chains, also called food webs, food networks and/or trophic networks, describe the feeding relationships between species to another within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. Typically a food chain or food web refers to a graph where only connections are recorded, and a food network or ecosystem network refers to a network where the connections are given weights representing the quantity of nutrients or energy being transferred.

Firstly there is the concern that the reduction of sea ice would lead to them not being able to hunt sufficiently to survive. Now another issue has been raised, one which affects the very food chain the polar bears are part of.

A sea level rise of at least 1 meter is in the pipeline, and there's nothing that we can do about it. This means that many historic sites near the coast will be submerged during our lifetime. Not to mention the marshlands critical to the coastal food chain. One helluva legacy to leave the younger generation. But at least we have our McMansions.

Kwaku LC Woods, M.D. R.N. and founder of Prometheus, a holistic medical education co. based in Cleveland, Ohio, takes a look at understanding human evolution and suggests going back to the sea for nutrition since our bodies, mainly water are quite similar to the composition of the sea, the beginning of life and food chain.

The world's oceans are becoming more acidic, which poses a threat to sea life and Earth's fragile food chain, a climate expert said Thursday. Oceans have already absorbed a third of the world's emissions of carbon dioxide, one of the heat-trapping gases blamed for global warming, leading to acidification that prevents vital sea life from...

Breaking up is hard to do, y'all, especially when you're part of a rich ecosystem of plant and animals that thrive under the frozen surface of the Antarctic sea. Evidence shows that ice plays a major role in the marine ecology by reducing light penetration to the waters beneath.