Although the nature in Pinkjärvi is diverse, extensive forestry operations have left their mark on the forest stands and landscape. Most of the forests have been managed quite intensively and are even-aged, and due to active forest management, there is relatively little deadwood.

Most of the mires in the area have also been used for forestry, and many were once drained to improve tree growth. The majority of the peatlands are spruce mires (korpi), but there are also some pine bogs (räme), particularly around ponds undergoing paludification.

Extensive restoration work has been carried out in Pinkjärvi. The aim of these efforts is to improve the natural condition of the area so that, functionally, it resembles a natural landscape after the restoration measures. On mineral soil sites, restoration measures have included the creation of deadwood, small openings, and controlled burning.

In previously drained areas, restoration has involved damming and blocking ditches to recreate the conditions of naturally wet habitats. These measures have in some places resulted in a significant amount of deadwood due to rising water levels causing trees — especially spruces — to die.

The insect species diversity in the area is relatively low, which can be explained by the uniform forest structure. The most common species is the striped ambrosia beetle (Trypodendron lineatum). A few insect species that depend on fire or are rarely found outside burned areas have also been recorded.

There is a rich diversity of polypores in the area, including indicator species of old-growth forest such as Phellinus chrysoloma and Phellinus viticola. However, no critically endangered old-growth species have been found in Pinkjärvi. The area has an unusually high number of occurrences of the rare Ganoderma lucidum (lacquered bracket).

Bird monitoring in Pinkjärvi has documented changes in species composition and population sizes due to restoration work. Populations of the Eurasian wren (Troglodytes troglodytes), which thrives in dense undergrowth, have multiplied. The green sandpiper (Tringa ochropus), which prefers small forest ponds and wetlands, has also become more common. The Eurasian three-toed woodpecker (Picoides tridactylus), previously a rare nester, now breeds regularly in the area with 2 to 4 pairs. Standing dead spruce stands provide a plentiful food source for this species. The nationally vulnerable lesser spotted woodpecker (Dendrocopos minor) is also believed to have become slightly more abundant. In addition, the proportion of cavity-nesting birds in the avifauna is gradually increasing.

Among the threatened plant species found in the Pinkjärvi area are the Gymnadenia and broad-leaved helleborine (Epipactis helleborine). These species are being monitored as part of Finland’s general endangered plant species monitoring. Other notable plant species in the area include water soldiers (Stratiotes aloides), greater pond sedge (Carex riparia), and grass-wrack pondweed (Potamogeton compressus).