The biggest problem on the island is the secondary overgrowth with the common reed. This is linked, among other things, to the abandonment of extensive livestock grazing on the island. Reed overgrowth induces the smothering of other plant formations and contributes to a drastic reduction in the biodiversity of the area. Reed expansion causes the loss of valuable breeding habitat for many bird species. A significant threat to the island is also the activity of predators such as e.g. red fox, raccoon dog, and some corvid birds - their activity significantly affects the breeding success of many bird species - e.g. ducks and meadow waders. An important threat is also the change in water relations caused by climate change - less frequent retreats of seawater from the Baltic Sea result in less supply of salty seawater to the island, important for the valuable coastal salt marshes.

The reserve is an important stopover point for migratory birds - it is within the range of the East Atlantic Flyway. Many bird species use the island as a place to rest and recuperate - flocks of geese, ducks, cranes, snipes, as well as lapwings, Eurasian curlews and other meadow waders stop here. Surveys at the end of the last century revealed the presence of a relatively large breeding population of Aquatic Warblers and valuable species from the group of waders including the Dunlin subspecies schinzii. Particularly important was the fact that the area was inhabited by Aquatic Warblers, as then and now this species is one of the most threatened passerine birds of continental Europe. Today, the Aquatic Warbler has extinct from the area with the collapse of the West Pomeranian population of the species, but there is a prospect for its return. An important species for Karsiborska Kępa is the White-tailed eagle - an emblematic bird for Woliński National Park, which benefits from the island's bird abundance. On Karsiborska Kępa there are breeding populations of lapwing, redshank, bearded reedling, common snipe, common crane, greylag goose, and single pairs of lemon pipit. Also ohars try their hand at it. On Karsiborska Kępa there is a rare and valuable plant community - coastal saltmarsh. The salt marshes are mainly two plant communities, forming a mosaic: a coastal halophilous meadow, i.e. a halophilous (brackish) meadow, and a halophilous (brackish) rush. The greatest floristic curiosity is the buck's-horn plantain, which has the only natural site in Poland.

The semi-natural character of the nature reserve and the progressive succession of the reed beds oblige us to take permanent measures to preserve the natural values of the site. Our main objectives are: to maintain and increase the breeding population of waders, to restore and maintain the breeding population of Aquatic Warblers, and to maintain the saltmarsh character of the island's vegetation. We do this by, among other things, mowing expansive vegetation. Preservation of breeding habitats for wetland-associated birds is possible by mowing dense reed beds and providing suitable water conditions for this species during the breeding season. Repeating such a process for many years leads to it becoming thinner and weaker, thus providing more space and more favourable light conditions for sedges and saltmarsh species. In the western part of the island, at least one mowing is carried out annually and all mowed biomass is removed outside. This treatment makes it possible to maintain favourable breeding habitats for meadow waders: lapwing, snipe and redshank, and to expose light-loving salt marsh grasslands. OTOP BirdLife Poland also carries out the so-called initial mowing, which consists in getting rid of dense reed rushes that have covered abandoned areas for a long time - this is one of the elements aimed at restoring former habitats - both plant and bird. A measure common to both habitat types is the adaptation of water management in the reserve to the needs of nature conservation. In order to maintain an adequate water level as well as water quality, suitable water intakes were made from the Świna River and the pump station was modernised. This allows us to ensure optimum water levels in floodplains, puddles and ditches necessary for birds during breeding. At the same time, the intake of water from the Świna River ensures that the water is sufficiently saline to maintain the salt pans. Work is currently underway to modernise and improve the entire system in order to adapt it to current changes in nature.

Most of the conservation activities we carry out in the reserve are subject to ongoing internal monitoring - above all, we collect data describing the nature of the activities undertaken, their location and their effectiveness. One of the most important types of monitoring is that of vegetation cover and breeding birds. Analyses of the collected data allow us to control and evaluate the effectiveness of our conservation measures.