THE BENEFITS OF AN ECOSYSTEM-BASED APPROACH

These landscape and stand level examples, illustrating the functions of some important forest composition and structures, indicate why practices such as clearcutting and elimination of old growth forests are not consistent with maintaining fully functioning forests. If the degradation caused by clearcutting and removal of old growth forests were more evident, people might be more willing to adopt ecologically responsible approaches to timber management.

However, because forests operate on such long timeframes, and because, for millennia, forests have been building biological legacies through many generations of trees that have lived and died, human activities that remove composition and structures do not immediately appear to be as damaging as they actually are. However, as timber managers continue to degrade composition and structures of forests, from landscape to stand levels, damage to forest functioning becomes cumulative. Eventually this approach leads to degraded ecosystems, which provide few ecological functions, compared to the fully functioning forests they replaced. Because forest degradation occurs relatively slowly, successive generations of human beings inherit degraded forests which they assume to be natural, “healthy” ecosystems. In other words, we don’t live long enough to see the results of our mistakes.

An ecosystem-based approach attempts to avoid loss of forest functioning by maintaining forest composition and structures from the smallest soil bacteria to the landscape patterns of a large forest watershed. We may not understand the functions of particular forest composition and structures; nevertheless, an ecologically responsible approach protects all composition and structures. When parts of the forest are altered during activities such as ecologically responsible timber management or tourism, provisions for the replacement of forest composition and structures are built into ecologically responsible plans and activities.

As well as providing for the protection and maintenance of forest functioning, an ecosystem-based approach fosters the development of diverse, sustainable human economies. Because an ecosystem-based approach creates the least modification to forest ecosystem composition and structures, it provides for the largest diversity of compatible forest uses. In other words, by maintaining trees on the sites where we practice timber management and by ensuring that ecologically viable old growth stands are found in each landscape, we provide an environment where the broadest spectrum of uses, from adventure tourism to timber extraction, can coexist. Such a range of activities is not possible where conventional timber management systems, such as clearcuts and tree plantations, are employed.

From a timber standpoint, because ecologically responsible timber management produces steady supplies of mature wood, the long-term economic benefits exceed those of conventional timber management practices. Mature wood—long-fibred and strong—is superior for many uses, from structural materials and pulp to furniture and fine cabinets. In comparison, short-fibred, juvenile wood is not as strong and will warp and twist easily. Mature wood is produced when the cambium layer (the single layer of cells between the wood and the bark) divides around dead branches or no branches. Obviously, increasing amounts of mature wood are produced as a tree gets larger and older.

WHAT IS FORESTRY ???

Forestry is the science of understanding to manage forest resources for the benefit of man. Forestry practices to help maintain an adequate supply of wood for timber, plywood, paper, and other wood products. In addition, understanding the value of forestry include managing forest resources such as water, wildlife, grazing areas, and recreational areas.

In general, the forest provides maximum benefit when administered with the goal of providing multiple benefits at once. This concept is called "multiple use forest management" or forest management with multiple benefits. In addition to producing lumber, forests can provide clean water for people, food and shelter for wildlife; land livestock grazing, and recreation for campers, hikers, and picnics.

Each person has different interests in forests. For example, a company that manufactures wood products primarily manage their forests for commercial timber production. Or forests can be protected as a protected area and conservation area.
Countries that have forests have one government agency to manage the forest lands and conducting research.

THE EFFECTS OF SLASHING DAN BURNING OF LAND MANAGEMENT

Slashing and burning is the preferred method of land clearing in the tropics for smallholders and large companies alike because it is cheaper, at least from a private perspective, and easier than available alternatives. In addition, fire eliminates field debris, reduces problems with weeds and other pests and diseases, makes nutrients available in the form of ash and loosens the soil to make planting easier. In some ways it is preferable environmentally compared to some other land-clearing methods.


For example, bulldozers and other heavy machinery cause soil compaction and erosion. Fire has many distinct advantages for low-income households: all other methods are more expensive; fire kills crop pests and diseases; and the ash provides much-needed fertilizer. Results of field experiments and surveys in Sumatra Indonesia demonstrate the key role that phosphorus (P) plays in resource management. Burning at low or medium intensity releases P into soil solution, but high-intensity fires reduce P levels. With greater fuel supply, hence hotter fires, the negative effects of heat on soil mineralogy offset the positive effects of additional ash.

DEFINITION AND UNDERSTANDING OF ECOSYSTEM MANAGEMENT

Definition and Understanding of  Ecosystem Management is a confusing mixture of good forest ecology principles and integrated or multiple use forest management. Advocates of ecosystem management analyze and describe ecosystem functioning in ways that recognize the need to maintain natural composition and structures of forest ecosystems from the landscape level to the stand or patch level.

However, while providing good information about forest functioning, practitioners of ecosystem management also continue to advocate methods and levels of timber extraction that degrade forest ecosystem composition, structures, and functioning necessary to maintain fully functioning forests through time. Conventional clearcutting and tree plantations are regular components of ecosystem management.

In contrast, ecologically responsible timber management is ecosystem-based, which means that the character (i.e. composition, structure, and functioning) and condition of ecosystems determine what types of human use can be carried out and in what ways and at what level of intensity these uses can occur while ensuring the maintenance of fully functioning forests at all scales through time.

Conventional timber management approaches described above all utilize concepts oriented to exploiting natural forests for timber and to producing crops of trees in short time cycles. Most of these concepts have little or no application in ecologically responsible timber management, because conventional approaches are focused on timber, while ecosystembased, ecologically responsible approaches are focused on forests.

UNDERSTANDING MULTIPLE USE FOREST MANAGEMENT

Understanding Multiple Use Forest Management is a system of forestry or timber management that assumes that a full spectrum of forest uses, from timber cutting and tourism to water production and nontimber forest products, can occur simultaneously throughout a forest landscape. When practiced across relatively large areas (500,000 hectares/1.2 million acres and larger), multiple use appears to work for a period of time.

However, under this regime, all forest stands with merchantable and economically accessible timber are planned for eventual timber cutting. Thus, as logging progresses through the landscape, both forest functioning and non-timber forest uses are progressively degraded.

Proponents of multiple use often attempt to convince other forest users that tree plantations are forests, and that society cannot afford to protect animals, plants, and microorganisms that stand in the way of economic growth. An ecosystem-based perspective maintains that human societies cannot afford not to protect forest functioning and maintain diverse forest uses that are the foundation for stable local economies.

DEFINITION OF FOREST LANDSCAPE

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Definition of forest landscape is the large-scale view of a forest. When industrial timber managers use the term “forest landscapes,” they are usually concerned with scenery and visual impacts. In the context of an ecosystem-based approach, however, a forest landscape is a mosaic of interconnected, interdependent stands or patches that are repeated in a pattern across the larger landscape. This pattern has both spatial and temporal components.

An ecosystem-based approach requires that all planning and activities begin at the regional/landscape level. When planning for human use, landscape level decisions are made for watersheds of small to moderate size (less than 5,000 hectares to about 50,000 hectares, or 12,000 to 125,000 acres). In sub-regional or regional planning processes, forest landscape level considerations are expanded to large watersheds encompassing hundreds of thousands of hectares/acres.

In planning and carrying out forest uses, particularly timber management, many people tend to focus on small forest parcels. This is a result of our limited spatial view, short time frames, and cultural conditioning. In contrast, an ecosystem-based approach requires that all planning and activities start at the landscape level. The character and condition of the forest landscape dictate what is ecologically possible at the stand level.

The character of a forest ecosystem refers to how a forest works, from the landscape level to the stand or patch. For example, forests that have frequent fires have a different character than forests where wind and root decay are the primary agents of disturbance. Some forests are characterized by steep slopes, shallow soils, and well-defined drainage patterns, while other forests have gentle slopes, cold soils, and diffuse drainage patterns.

Forests of a different character will have different composition and structures, and therefore differences in how they function. Different composition, structures, and functioning lead to different kinds of ecological limits to human use. Ecological limits are natural factors or processes that are easily damaged or degraded if modified by human uses. For example, steep and/or wet slopes impose ecological limits because, if disturbed, they are likely to erode, causing problems like soil loss and siltation of streams. Cold soils are an ecological limit because nutrient cycling occurs in shallow organic layers which may be easily damaged by many types of human activities.

The condition of a forest describes how human uses have modified forest functioning from the landscape level to the stand or patch level. Conventional timber management frequently results in negative impacts, like fragmentation, loss of old growth, and soil degradation. An ecosystem-based approach protects forest composition and structure and respects the ecological limits of forests to various human uses. By respecting ecological limits ecosystem-based approaches avoid degradation of short- and long-term forest functioning.
Ecological limits to human use are determined by describing and interpreting the character and condition of, first, the forest landscape, and then the forest stand or patch.