How do changes in the biosphere affect biodiversity? Why is marine biodiversity important? How does urbanization affect biodiversity? How do oil spills affect biodiversity? How can an invasive species affect an ecosystem? How are invasive species a threat to biodiversity?
根据第三段But human activities are having a negative impact on many of the world's oceans, jeopardizing marine life,habitats,and ecosystems.These threats include overfishing or destructive fishing,coastal development,pollution and runoff,and the introduction of non-native specie...
Global production has been growing annually at 7 to 8 %.Footnote15Although most of the aquaculture production which already provides nearly half of the global consumption of fish and shellfishFootnote16comes from pond culture, the marine sector has been gaining in importance. More than 600 species...
Biodiversity is the number of different species that live in and their population sizes within an ecosystem. Ecosystems with high biodiversity are more stable and are better able to handle disturbances or physical stresses.Answer and Explanation: Overgrazing reduces biodiversity because it damages natural...
those found on land as in the ocean there are many different sizes of fish and other species that in turn prey upon successively smaller species. This means that for top-level predators, their diets potentially depend on half a dozen other species all able to survive in the same ecosystem....
Overfished: When the fish population is very small Overfishing: When the rate at which the fish are caught every year is too high Among the different kinds of fishes found within the mackerel category, NOAA carries out stock assessments of most of the popular varieties. Based on these assessme...
While sharks have long been at the top of the food chain, overfishing, climate change and the deteriorating health of the oceans mean that70% of shark and ray species have disappeared in the last 50 years.Media-fuelled misconceptions have played a major role in this trend. ...
Despite their importance, oceans are increasingly threatened by global warming and human activity, with rising temperatures impacting fragile marine ecosystems. More than 100 nations, including the United States, have agreed to protect 30% of the world's oceans by 2030, through an initiative known ...
A food web works in a habitat by providing all organisms with the food they require to stay alive. All food webs, with the exception of those in the... Learn more about this topic: Food Web | Definition & Examples from Chapter 11/ Lesson 1 ...
of n-3 fatty acids to those from fish. However, humans’ insatiable appetite for aquatic sources of omega-3 fatty acids along with global warming are threatening the delicate Antarctic ecosystem and, ultimately, the survival of krill and the many marine animals that depend on them for food.29...