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It depends on the species. If fish were to disappear then it could have a large adverse effect on the ecosystem. However, in many cases it could negatively effect the ecosystem.
Extinct or threathening the species to extinct
Keytone Species
Keytone Species
An endangered ecosystem is a natural environment that is threatened with collapse and disappearance due to human activity, pollution and species extinction or overpopulation among other factors. Living and nonliving entities interact, form interdependent relationships and exchange energy and matter in ecosystems that can be as large as the planet or as small as a fishbowl. When the interdependence between an environment's species and physical and chemical factors is disrupted, the ecosystem becomes endangered and can possibly disintegrate completely. The consequences of ecosystem collapse include mass extinction, species populations surging beyond control, disruption of human food supplies, erosion, flooding, acceleration of climate change and the disintegration of large regions of the natural environment. There are many natural and human causes of an endangered ecosystem, causes that often disrupt an ecosystem's food chain and physical environment. Overfishing of a particular aquatic species such as sharks or bluefin tuna can detrimentally impact a food chain by depleting large predators that keep smaller species populations from surging out of control. Without large predators, many species will breed beyond the immediate environment's ability to support them thus resulting in resource and food diminution and an endangered ecosystem. When the resources of the current ecosystem are exhausted, an overbred species may then move to a new environment where it may become invasive and destructive. Species can also be introduced into an ecosystem by man in an effort to control the population of a native animal or insect but have a disruptive effect instead.
it depends on what kind of species of endangered dolphin. it is true that some species are endangered partially because of their food (this is because these dolphins eat tuna, which is hunted daily by humans).
Loss of one species from a community has a large effect. This is because this can cause major changes in food webs and chains and can cause other organisms to die.
it would have still endangered sooo...... dont bother them
assd
Understanding ecosystems is important because you need to know what effect you are going to have on it. Most endangered species are endangered because people have destroyed their habitats because they didn't realize that what they were doing would affect that species. Everything on the planet is inter-connected, and we should learn how those connections work so that we can stop killing off our fellow living things.
It would disrupt the ecosystem by greatly reducing the population of a few species.
In an ecosystem when a large number of species are dependent on one particular species of bird this makes the bird a keystone species. This bird has a disproportionate effect on the surround environment because so many others are dependent on it.