1. Threats in nature in Polish national parks

2. Biebrzański National Park
Depending on the type of ecosystem, we are dealing with different types of threats. This is not the case with dry sand dunes and adjacent to them coniferous forests, or the marsh meadows and forests, wet habitats and wet, yet different from aquatic ecosystems. The mere granting legal status of protection areas in the Park, do not significantly affect the improvement of their natural condition. They are thought necessary action to preserve the values that were the reason for granting protective status.
In the entire park are the most important two factors constituting threat to existence of many ecosystems and their natural assets: land drainage and abandonment of extensive use of wetland meadows and grazing cattle by the local population.

3. Woliński National Park
Forest Park are exposed to natural factor, what are storm winds. Risks that they bring with them are mainly stands on former farmland. Other factors - snow, rain, due to its infrequency and short range do not play a major role in the life of the forest.
Conducted for many years, observations of the state of health of forests show their high internal resistance to mass emergence of insects and fungal diseases that could unsettle sanitary condition. Most often elevated (compared to accepted thresholds) numbers are diagnosed with bordered white, and the nun moth. Among the important role of fungi on former farmland plays a hub roots.

4. Bieszczadzki National Park
In the areas of partial protection, where are carried out various protective measures, particularly important is the knowledge about the distribution of rare species of plants and animals and concern for their behavior.
Mountain streams are ecosystems in which there are a large number of valuable and rare species of small animals. Their protection is reduced generally to counteract the discharge of sewage polluting water. The smooth running of sewage treatment plants and monitoring of hydrochemical and hydrobiologicznego very important tasks Park.

5. Tatrzański National Park
The threat to nature of the Tatra National Park is poaching, development of sports and tourism and economic development of Zakopane. Acid rain and air pollution also pose a threat to forests and aquatic ecosystems TPN. Because every year the park is visited by huge numbers of tourists, which for him another threat introduced a fee for access to its territory. Being already in the area should be strictly observed his rules, and so move only the marked trails, not to camp, do not collect berries, mushrooms, or specimens of plants and minerals. Effective peace, silence, niepłoszenie game and niezaśmiecanie. We all want to beauty and infrastructure of the Tatra National Park enjoyed our eyes now and in the future.

6. Poleski National Park
The main threat to non-forest land ecosystems has been observed for years overgrowing open areas. This process consists mainly of peat bogs, but also moors and meadows unused. His reasons lie in land reclamation conducted several years ago, which essentially consists in drying large areas. The result of the construction of a system of ditches and drainage channels was the lowering of the water table, then aeration of the peat, accelerate their mineralization, and ultimately, drastic changes in soil conditions.

7. Wigierski National Park
The first settlers in the area Gorce arrived at the beginning of the fourteenth century. The formation of pastoral glades lasted until the first half of the nineteenth century. The greatest destruction of forests Gorce took place in the nineteenth century, when mass was excised in easily accessible areas of large tracts of primary forests. In the upper subalpine spruce revealed acceleration of dynamic changes in the stands (shortening the terminal phase and the transition phase initialised). Factors direct these changes are insects Kambio- ksylofagiczne and strong winds.
The most important tasks of the park include: ensuring strict protection and re- naturalization of the maximum use of the forces of nature in relation to forest ecosystems and the protection of open glades in subalpine forests in order to preserve their biodiversity along with cultural values and landscape.

8. Thank you for your attention !