(e.g., short vs. long term impacts; light vs. heavy impacts):
Quantify the duration and frequency of each impact to species;
Assess appropriate levels of duration and frequency of each impact to species
The duration and frequency of an impact help to determine how vulnerable a species is to the impact. Impacts that are short and infrequent are likely to negatively affect species less than an impact that is medium or long-term and frequent. Ecosystems are often unable to recover following large and/or frequent disturbances, changing the structure and function of the system.