They can also increase nutrient content of the soil in certain areas, or shift soil about as termites, ants, and moles do creating patches in the habitat. Coupled with the stochastic nature of disturbance events and other long-term e. The fire in Victoria was excluded from our analysis, but is known to have burned large swathes of structurally mature forest outside our study area [ 33 ]. The consequences of these fragmented distributions of small patches of mature forests for biodiversity are well documented for south-eastern Australia [ 313364 ], particularly for the Central Highlands of Victoria where there is concern for the population viability of several threatened mammals following the widespread collapse of old trees with hollows [ 33 ]. Ecological processes Ecological succession Biology terminology Environmental terminology Habitat. Threshold values of forest cover that positively influence the persistence of these species in the landscape are rare, and tend to be described for cases where the surrounding matrix habitat has been substantially altered, for example, cleared for agriculture e. The animal population increases and diversifies with the development of forest climax community.
However, we consider a landscape context planning approach to be a useful complement to, not a replacement for, a backbone of strategic retention networks in formal and informal reserves, to highlight regions of the landscape that might be deficient in mature forest or reserved habitat.
Stages of forest succession
As such, developing planning systems that retain regrowth forest in the landscape to progress to mature forest should remain a management priority. This layer can also include multiple species of ferns, sedges and grasses, as well as tree seedlings that are just emerging and establishing themselves. Timber harvesting in these forests has historically created even-aged stands through a regime of clearfell, burn and sow silviculture on rotations of 45— years [ 4344 ] with coupe sizes ranging from approximately five to fifty hectares. Relative proportion of structurally mature forest in four types of long-term retention at three spatial scales in a Tasmania and b Victoria. In some cases the new species may outcompete the present ones for nutrients leading to the primary species demise. Ecological succession is the process of change in the species structure of an ecological community over time. Given that our study categorized structurally mature forest from aerial photograph derived GIS layers, the extent to which such patches represent habitat for different mature-forest-associated taxa also needs to be determined.