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Kormorani pesapaigas tuleb toime vaid paar linnuliiki

Kormorani pesapaigas tuleb toime vaid paar linnuliiki

EN

Only a few bird species can cope in cormorant nesting areas

Tartu Ülikooli teadlased leidsid, et . Kormoranid kasvavad kiiresti ja . See muudab teiste lindude elu raskemaks.
Kormoranid söövad kalu ja vajavad palju ruumi. Nad pesitsevad tihedalt koos. See tähendab, et . Mõned linnud, nupartid ja kajakad, .
Uuringus vaadati 261 saart aastatel 1960-2022. Kormoranid pesitsesid 71 saarel. Kui kormoranid saabusid, . Mõned linnud, nagu hahk ja kosklane, .
Kormoranid ei tapa teisi linde, aga nad . Lindudel tuleb leida uus koht. Kui kormorane on palju, pole lindudel kuhugi minna. See võib viia lindude arvu languseni.
Mõnel saarel kormoranid kadusid. Siis teised linnud tulid tagasi. See näitab, et , . Aga see võtab aega.
Kormoranid ei ole halvad, aga nad . Teadlased tahavad veel uurida, kuidas see mõjutab teisi saari. Lindude kolimine võib põjustada uusi probleeme.
Researchers from the University of Tartu found that cormorants reduce the number of other birds. Cormorants grow rapidly and take up a lot of space. This makes life harder for other birds.
Cormorants eat fish and require a lot of space. They nest densely together. This means other birds have less space. Some birds, such as mergansers and gulls, can no longer find good nesting sites.
The study examined 261 islands between 1960 and 2022. Cormorants nested on 71 islands. When cormorants arrived, the number of other birds decreased. Some birds, like the goldeneye and goosander, almost completely disappeared.
Cormorants don't kill other birds, but they take over their nesting sites. Birds have to find new places. When there are many cormorants, birds have nowhere to go. This can lead to a decline in bird populations.
On some islands, cormorants disappeared. Then other birds returned. This shows that birds can return when space becomes available again. But it takes time.
Cormorants are not bad, but they change nature. Scientists want to study further how this affects other islands. The relocation of birds may cause new problems.