Any situation in which the current state of knowledge is such that: 1. the order or nature of things is unknown, the consequences, extent, or magnitude of circumstances, conditions, or events is unpredictable, and 2. credible probabilities to possible outcomes cannot be assigned. 3. Uncertainty can result from lack of information or from disagreement about what is known or even knowable. Uncertainty can be represented by quantitative measures (e.g. a range of values calculated by various models) or by qualitative statements (e.g. reflecting the judgment of a team of experts).

Any situation in which the current state of knowledge is such that (1) the order or nature of things is unknown, (2) the consequences, extent, or magnitude of circumstances, conditions, or events is unpredictable, and (3) credible probabilities to possible outcomes cannot be assigned.

Turbidity describes the cloudiness of water caused by suspended particles such as clay and silts, chemical precipitates such as manganese and iron, and organic particles such as plant debris and organisms.

Trophy hunting is defined as the hunting for one or more individuals of a particular species with specific desired characteristics (such as large size or antlers) with the payment of a fee by a hunter for a hunting experience and trophy. The most common trophy is the mounted head with horns or antlers, although other parts of animal body ( skins, tails, teeth, heads) or even the whole bodies can be also appreciated as a trophy.

The transport of contaminants between two trophic levels (Suedel et al., 1994).

The level in the food chain in which one group of organisms serves as a source of nutrition for another group of organisms.

A general development or change in a situation or in the way that people are behaving.

The general direction in which the structure or dynamics of a system tends to change, even if individual observations vary.

All trees excluded from the definition of forest and other wooded lands. Trees outside the forest are located on other lands, mostly on farmlands and built-up areas, both in rural and urban areas.

A land cover class that includes any geographic area dominated by natural tree plants with a cover of 10 percent or more. Areas planted with trees for afforestation purposes and forest plantations are included in this class.