Ecology Group Counts 1,044 Bird Nests on Golem Grad Island; Cormorant Numbers Decline
Members of the Macedonian Ecological Society (MED), under the guidance of Galičica National Park, conducted a bird nest census on Golem Grad island in Lake Prespa. The ecologists documented a total of 1,044 bird nests. The largest portion belonged to the cormorant (Phalacrocorax carbo) colony, with 865 nests. Additionally, 126 active nests were identified for the grey heron (Ardea cinerea). The remaining approximately fifty nests were attributed to the little egret (Egretta garzetta). A notable observation during the survey was the reported decrease in cormorant populations. This decline is attributed to attacks by jackdaws, which are impacting the cormorants' nesting success and overall numbers on the island. The survey highlights the ecological dynamics and challenges faced by bird populations in this protected area.
This ecological survey on Golem Grad island provides valuable data on avian populations within Galičica National Park. The reported decline in cormorant numbers, linked to jackdaw predation, illustrates a common interspecies dynamic that can significantly alter ecosystem balance. Understanding these predator-prey relationships is crucial for effective conservation strategies. Future management may need to consider interventions that support native species while mitigating the impact of invasive or overly aggressive competitors, balancing ecological integrity with species preservation in the long term.
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