Definition: Threats from actions that convert or degrade habitat in service of ﾓmanagingﾔ natural or semi-natural systems, often to improve human welfare
Definition: Suppression or increase in fire frequency and/or intensity outside of its natural range of variation
Exposition: This category focuses on the human activities that lead to either not enough fire or too much fire in the ecosystem in question. If fire escapes from established agricultural lands, it belongs here, if fire is used to clear new agricultural lands, it belongs in the appropriate category in 2. Agriculture & Aquaculture. It also includes damaging “natural” fires in systems that have lost their natural resilience.
Examples:
fire suppression to protect homes
inappropriate fire management
escaped agricultural fires
arson
campfires
fires for hunting
7.2 Dams & Water Management/Use
Definition: Changing water flow patterns from their natural range of variation either deliberately or as a result of other activities
Exposition: This category focuses on the human activities that lead to either not enough water or too much water in the ecosystem in question. Note that homogenizing flows to a constant level may be outside the “natural range of variation.” Dredging belongs in 4.3 Shipping Lanes.
Examples:
dam construction
release of too little or cold water from dam operations
sediment control
change in salt regime
wetland filling for mosquito control
levees and dikes
surface water diversion
groundwater pumping
channelization
ditching
artificial lakes
7.3 Other Ecosystem Modifications
Definition: Other actions that convert or degrade habitat in service of ﾓmanagingﾔ natural systems to improve human welfare
7 Natural System Modifications
Definition: Threats from actions that convert or degrade habitat in service of ﾓmanagingﾔ natural or semi-natural systems, often to improve human welfare
Exposition: This category deals primarily with changes to natural processes such as fire, hydrology, and sedimentation, rather than land use. Thus it does not include threats relating to agriculture (which should be under 2. Agriculture & Aquaculture), or infrastructure (1. Residential & Commercial Development or 4. Transportation & Service Corridors).
7.1 Fire & Fire Suppression
Definition: Suppression or increase in fire frequency and/or intensity outside of its natural range of variation
Exposition: This category focuses on the human activities that lead to either not enough fire or too much fire in the ecosystem in question. If fire escapes from established agricultural lands, it belongs here, if fire is used to clear new agricultural lands, it belongs in the appropriate category in 2. Agriculture & Aquaculture. It also includes damaging “natural” fires in systems that have lost their natural resilience.
Examples:
7.2 Dams & Water Management/Use
Definition: Changing water flow patterns from their natural range of variation either deliberately or as a result of other activities
Exposition: This category focuses on the human activities that lead to either not enough water or too much water in the ecosystem in question. Note that homogenizing flows to a constant level may be outside the “natural range of variation.” Dredging belongs in 4.3 Shipping Lanes.
Examples:
7.3 Other Ecosystem Modifications
Definition: Other actions that convert or degrade habitat in service of ﾓmanagingﾔ natural systems to improve human welfare
Examples: