Click here for Direct Threats Classification (v2.0)
Following is Direct Threats (V1.0)
How Do We Define “Direct Threats”?
Direct threats are the proximate human activities or processes that have caused, are causing, or may cause the destruction, degradation, and/or impairment of biodiversity targets (e.g., unsustainable fishing or logging). Direct threats are synonymous with sources of stress and proximate pressures. Threats can be past (historical), ongoing, and/or likely to occur in the future.
1 Residential & Commercial Development
Threats from human settlements or other non-agricultural land uses with a substantial footprint
1.1 Housing & Urban Areas
Human cities, towns, and settlements including non-housing development typically integrated with housing
1.2 Commercial & Industrial Areas
Factories and other commercial centers
1.3 Tourism & Recreation Areas
Tourism and recreation sites with a substantial footprint
2 Agriculture & Aquaculture
Threats from farming and ranching as a result of agricultural expansion and intensification, including silviculture, mariculture and aquaculture
2.1 Annual & Perennial Non-Timber Crops
Crops planted for food, fodder, fiber, fuel, or other uses
2.2 Wood & Pulp Plantations
Stands of trees planted for timber or fiber outside of natural forests, often with non-native species
2.3 Livestock Farming & Ranching
Domestic terrestrial animals raised in one location on farmed or non-local resources (farming); also domestic or semi-domesticated animals allowed to roam in the wild and supported by natural habitats (ranching)
2.4 Marine & Freshwater Aquaculture
Aquatic animals raised in one location on farmed or non-local resources; also hatchery fish allowed to roam in the wild
3 Energy Production & Mining
Threats from production of non-biological resources
3.1 Oil & Gas Drilling
Exploring for, developing, and producing petroleum and other liquid hydrocarbons
3.2 Mining & Quarrying
Exploring for, developing, and producing minerals and rocks
3.3 Renewable Energy
Exploring, developing, and producing renewable energy
4 Transportation & Service Corridors
Threats from long narrow transport corridors and the vehicles that use them including associated wildlife mortality
4.1 Roads & Railroads
Surface transport on roadways and dedicated tracks
4.2 Utility & Service Lines
Transport of energy & resources
4.3 Shipping Lanes
Transport on and in freshwater and ocean waterways
4.4 Flight Paths
Air and space transport
5 Biological Resource Use
Threats from consumptive use of “wild” biological resources including both deliberate and unintentional harvesting effects; also persecution or control of specific species
5.1 Hunting & Collecting Terrestrial Animals
Killing or trapping terrestrial wild animals or animal products for commercial, recreation, subsistence, research or cultural purposes, or for control/persecution reasons; includes accidental mortality/bycatch
5.2 Gathering Terrestrial Plants
Harvesting plants, fungi, and other non-timber/non-animal products for commercial, recreation, subsistence, research or cultural purposes, or for control reasons
5.3 Logging & Wood Harvesting
Harvesting trees and other woody vegetation for timber, fiber, or fuel
5.4 Fishing & Harvesting Aquatic Resources
Harvesting aquatic wild animals or plants for commercial, recreation, subsistence, research, or cultural purposes, or for control/persecution reasons; includes accidental mortality/bycatch
6 Human Intrusions & Disturbance
Threats from human activities that alter, destroy and disturb habitats and species associated with non-consumptive uses of biological resources
6.1 Recreational Activities
People spending time in nature or traveling in vehicles outside of established transport corridors, usually for recreational reasons
6.2 War, Civil Unrest & Military Exercises
Actions by formal or paramilitary forces without a permanent footprint
6.3 Work & Other Activities
People spending time in or traveling in natural environments for reasons other than recreation, military activities, or research
7 Natural System Modifications
Threats from actions that convert or degrade habitat in service of “managing” natural or semi-natural systems, often to improve human welfare
7.1 Fire & Fire Suppression
Suppression or increase in fire frequency and/or intensity outside of its natural range of variation
7.2 Dams & Water Management/Use
Changing water flow patterns from their natural range of variation either deliberately or as a result of other activities
7.3 Other Ecosystem Modifications
Other actions that convert or degrade habitat in service of “managing” natural systems to improve human welfare
8 Invasive & Other Problematic Species & Genes
Threats from non-native and native plants, animals, pathogens/microbes, or genetic materials that have or are predicted to have harmful effects on biodiversity following their introduction, spread and/or increase in abundance
8.1 Invasive Non-Native/Alien Species
Harmful plants, animals, pathogens and other microbes not originally found within the ecosystem(s) in question and directly or indirectly introduced and spread into it by human activities
8.2 Problematic Native Species
Harmful plants, animals, or pathogens and other microbes that are originally found within the ecosystem(s) in question, but have become ﾓout-of-balanceﾔ or ﾓreleasedﾔ directly or indirectly due to human activities
8.3 Introduced Genetic Material
Human altered or transported organisms or genes
9 Pollution
Threats from introduction of exotic and/or excess materials or energy from point and nonpoint sources
9.1 Household Sewage & Urban Waste Water
Water-borne sewage and non-point runoff from housing and urban areas that include nutrients, toxic chemicals and/or sediments
9.2 Industrial & Military Effluents
Water-borne pollutants from industrial and military sources including mining, energy production, and other resource extraction industries that include nutrients, toxic chemicals and/or sediments
9.3 Agricultural & Forestry Effluents
Water-borne pollutants from agricultural, silvicultural, and aquaculture systems that include nutrients, toxic chemicals and/or sediments including the effects of these pollutants on the site where they are applied
9.4 Garbage & Solid Waste
Rubbish and other solid materials including those that entangle wildlife
9.5 Air-Borne Pollutants
Atmospheric pollutants from point and nonpoint sources
9.6 Excess Energy
Inputs of heat, sound, or light that disturb wildlife or ecosystems
10 Geological Events
Threats from catastrophic geological events
10.1 Volcanoes
Volcanic events
10.2 Earthquakes/Tsunamis
Earthquakes and associated events
10.3 Avalanches/Landslides
Avalanches or landslides
11 Climate Change & Severe Weather
Threats from long-term climatic changes which may be linked to global warming and other severe climatic/weather events that are outside of the natural range of variation, or potentially can wipe out a vulnerable species or habitat
11.1 Habitat Shifting & Alteration
Major changes in habitat composition and location
11.2 Droughts
Periods in which rainfall falls below the normal range of variation
11.3 Temperature Extremes
Periods in which temperatures exceed or go below the normal range of variation
11.4 Storms & Flooding
Extreme precipitation and/or wind events
Classification of Direct Threats
- Overview Web Page
- Download: PDF of Conservation Biology Article (320 KB)
