Unfortunately, recent studies found that the Plitvice Lakes ichthyofauna had changed significantly owing to anthropogenic activities. The changes are mostly reflected in the introduction of alien species which have become dominant in the lakes. In addition to the direct impact of the alien species as competition and predators, the negative impact on the indigenous species is also reflected in the changes in habitat conditions, which have become suboptimal or entirely unsuitable, possibly even lethal for individuals of the indigenous species.

The first project to remove the invasive fish species in the Plitvice Lakes National Park was carried out in 2021, and the activities are still ongoing today. Harvesting activities are carried out every month from April to October.

The project “Removal of Invasive Fish Species in the Plitvice Lakes National Park” has been carried out by the Faculty of Science of the University of Zagreb, the public institution AQUATIKA – Karlovac Freshwater Aquarium and the employees of the Park’s expert service. The main purpose of the project is to harvest the alien species of fish from the Plitvice Lakes National Park watercourses and to re-establish adequate conditions for indigenous species and ensure their survival.

Objava Harvesting of non-indigenous species of fish in the Plitvice Lakes National Park pojavila se prvi puta na Nacionalni park "Plitvička jezera".

This species was studied and monitored by the Faculty of Science of the University of Zagreb in cooperation with the employees of the Park’s expert service.

Fens are relics from the colder periods in Earth’s history. They are also major carbon stores and contribute significantly to combating climate change. Today they are facing extinction mostly owing to climate change, changes in the water regime, desiccation and succession.

Objava Varnished hook moss in the Plitvice Lakes National Park pojavila se prvi puta na Nacionalni park "Plitvička jezera".

The employees of the Park’s expert service have been monitoring this species for years in order to identify potential threats and be able to react in time.

This is a globally critically endangered species. It is a target Natura 2000 species for the area of the Plitvice Lakes National Park.

Objava Siberian ligularia in the Plitvice Lakes National Park pojavila se prvi puta na Nacionalni park "Plitvička jezera".

It is one of the slowest growing plants in the world, taking between six and eleven years to produce flowers and seeds. In order for the seed to sprout, the ground containing the seed must also contain a special type of fungus that provides nutrients needed for sprouting.

In Croatia, this plant is found in the area of Gorski Kotar and Lika. Only a few populations with a small number of individuals have been found in the Park area.

The employees of the Park’s expert service have been monitoring this species for years in order to determine any changes in the number and the population status, and to identify threats.

Objava Lady’s slipper in the Plitvice Lakes National Park pojavila se prvi puta na Nacionalni park "Plitvička jezera".

 Ten beaver lodges and around twenty beaver individuals have been found in the watercourses and lakes in the Plitvice Lakes. Beaver monitoring in the Plitvice Lakes began in 2019 and is ongoing today. OIKON d.o.o. and the employees of the Park’s expert service are monitoring and studying this species. The aim is to determine the number of individuals, the population status and the biology of this species in the Park area.

Objava Beaver in the Plitvice Lakes National Park pojavila se prvi puta na Nacionalni park "Plitvička jezera".