Animals in the Rain Forest That Compete for the Same Food | Sciencing
Jaguar male (Panthera onca) in Sani Isla. By Sean McHugh. http:// pdl-inc.info By Thomas Samuelson Rainforests are incredibly. Information about symbiotic relationships and mutualism in the rainforest. and seed dispersal to predator-prey relationships to symbiotic relationships. Section 3 concentrates on the diversity of the tropical rainforest. Together, the two different species form a predator-prey relationship. The predator prey relationship plays an important ecological part in the tropical rainforest.
They are sometimes even able to snare jaguars, making the anaconda one of the competitors for the top of the rainforest food chain. Sciencing Video Vault Nocturnal Roamers Some animals have adapted to competition by coming out at night.
Certain types of bats and frogs want to eat the same fruit and insects that birds love, but if they come out to eat during the day, they risk becoming prey for those birds and larger predators such as leopards. Evolutionary Advantages Other rainforest animals have developed advantages to give them an edge over animals that compete for the same resources.
For example, the Amazon is home to more than 1, bird species, many of which go after the same nuts, insects and fruit. Some types of birds, such as toucans and parrots, have developed strong beaks that act as nutcrackers. Another example is the jaguarundi, a small wild cat.
In the rainforest, it has to compete with bigger cats such as pumas and ocelots for rodents and other small mammals, so jaguarundis have adapted to their areas.
Ones that live in denser, darker areas like rainforests produce darker pelts than their counterparts that live in desertlike areas.
In this way, they blend in better than some of their competitors and snag prey without getting eaten themselves. References Rainforest Action Network: But if there are lots of hares chewing up the new shoots, then the plants strike back by producing bitter-tasting toxins.Rainforest: Prey & Predator
The hares reproduce less on this diet, and so fewer hares leads to a food shortage for the lynxes as well. Pretty soon both hares and lynxes are thin and hungry and many die and fail to leave babies. When the willows are no longer being eaten, they go back to producing new shoots that have no toxins, and then the hares can increase and so can the lynxes.
This all takes about 10 years to repeat itself. So, maybe it's the plants controlling the herbivores from the "bottom" of the food pyramid, rather than the predators controlling from the "top. Now biologists are more cautious about conclusions and try to look broadly at many interacting components in ecosystems before drawing conclusions.
Tropical Rainforest by Devin Green on Prezi
On BCI, for example, there were scientists who felt that the ecosystem is not "normal" because they did not see many signs of predators. Now we know that the predators are there, but are just hard to detect.
Our remote-sensing camera system has helped in this regard. Also, scientists have thought that the snowshoe hare and lynx story of changing numbers is typical of species in the cold, wintry north, but not in the tropics where the climate is relatively stable. However, the results of the mammal census have shown us that the numbers of only some species stay the same, while many others do show sharp changes.
This has coincided with a time when the number of ocelots on the island has remained high at 26 individuals. So did the ocelots eat lots of these agoutis?
How many agoutis do ocelots actually eat? We just don't know. Even with all 30 of our cameras working, we rarely get photos showing ocelots with prey. In hundreds of ocelot still photos we have just two cases of predation-- one ocelot catching an opossum, and one carrying a spiny rat. The opossum photo is interesting because it's part of a story.
We have a photo first of a small "common Opossum" of the type called "Didelphis. This prevents the camera from using up an entire roll of film on one animal that stands in front of the camera. The next photo shows the male ocelot "Colmillo" which means"Tooth" grasping something dark and furry in his toothy jaws and using his paw to hold it, in the exact same location as where the opossum stood.
Then Colmillo is gone and hours later that night a big opossum stands in the same spot, with his fur sticking up and his eyes wide open in alarm. I went to the location after I developed the film, and found tufts of opossum fur at the exact spot where the small opossum stood. I imagine that the big opossum was very frightened by the evidence of violence on that spot and the bright flash from the camera.
People on BCI rarely see ocelots, and hardly ever observe predators in action. Yet, two remarkable observations occurred in the last few months. The cat climbed into a low tree, following the monkey upwards. The cat caught the monkey by the throat, and they tumbled to the ground, where the ocelot killed the monkey with a neck bite, and dragged it away into the forest. The other howler monkeys kept screaming for a long time. These are very special sightings.
We also know from the agouti radio-tracking work of Enzo Aliaga-Rosell that agoutis are often eaten by predators. Our video camera-trap allowed us to capture one more case of predation by ocelots, this time on an agouti.
You can view our video clip that shows a mother ocelot bringing her large kitten at night to share an agouti that she killed earlier in the day.