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The latest international research: severe deforestation threatens the survival of giant eagle species |
China News Service, Beijing, July 1 (Reporter Sun Zifa) Springer Nature’s open-access academic journal "Science Reports" recently published an ecological research paper saying that in the heavily deforested Amazonian forest area, the world’s largest The horned eagle, one of the species of the eagle family, has difficulty feeding offspring and faces threats to its survival
.
The corresponding author of the paper, Everton Miranda of the University of KwaZulu-Natal, South Africa, and colleagues found that the horned eagle's survival depends on specific prey living in the forest canopy, including sloths and monkeys
.
In heavily deforested areas, canopy life is limited, and the small eagles are hungry
.
Using cameras and identifying prey bone fragments, they observed the prey species and prey delivery frequency of 16 horned eagle nests in the Amazon forest in Mato Grosso, Brazil, and assessed the weight of the prey
.
At the same time, the researchers also used maps and other tools to calculate the level of deforestation within 3-6 kilometers around the nest
.
map
The author’s observations show that the horned eagles living in deforested areas did not turn to other prey, but continued to capture canopy prey for young birds, but the frequency was lower and the prey was lighter
.
In areas where deforestation reached 50-70%, 3 small eagles died of starvation, and no horned eagle's nest was found in areas where more than 70% of the deforestation was achieved
.
Researchers calculate that more than 50% of the areas deforested are not suitable for horned eagles to successfully raise their offspring.
It is estimated that 35% of the areas in northern Mato Grosso are not suitable for horned eagles to breed
.
This may be the reason for the decline in the number of breeding pairs since 1985
.
They concluded that horned eagles rely on specific foods for reproduction, and these foods are difficult to hunt in deforested areas.