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Trophic cascades are powerful indirect interactions that can control entire ecosystems, occurring when a trophic level in a food web is suppressed. For example, a top-down cascade will occur if predators are effective enough in predation to reduce the abundance, or alter the behavior of their prey, thereby releasing the next lower trophic level from predation (or herbivory if the intermediate ...
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Lions are obligate carnivores consuming only animal flesh for their nutritional requirements.. A carnivore / ˈ k ɑːr n ɪ v ɔːr /, or meat-eater (Latin, caro, genitive carnis, meaning meat or "flesh" and vorare meaning "to devour"), is an animal or plant whose nutrition and energy requirements are met by consumption of animal tissues (mainly muscle, fat and other soft tissues) as food ...
The lion knocked 60-year-old Bergere off her bike and to the ground, clamping his powerful jaws around her face as it settled in for the kill, in the way that mountain lions do: Crushing and ...
A stoat surplus killing chipmunks (Ernest Thompson Seton, 1909) Multiple sheep killed by a cougar. Surplus killing, also known as excessive killing, henhouse syndrome, [1] [2] or overkill, [3] is a common behavior exhibited by predators, in which they kill more prey than they can immediately eat and then they either cache or abandon the remainder.
Idris Elba is back in theaters, starring in the new survival thriller, Beast. Elba plays Dr. Nate Samuels, a man on a vacation to a South African nature preserve with his two daughters. The trip ...
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A harmonious pack structure may allow for the emergence of more frequent cooperative hunts, as group activities and food sharing are facilitated by lower levels of aggression and fear. For example, spotted hyenas have been found to be better at a cooperative problem-solving task with a food reward than chimpanzees. In addition, their ...