Environmental Engineering Reference
In-Depth Information
Disturbance activities
Potential effects
Increased streambank erosion and
channel scour
Increased bank failure
Loss of instream organic matter and
related decomposition
Increased instream sediment, salinity,
and turbidity
Increased instream nutrient enrichment,
siltation, and contaminants leading to
eutrophication
Highly fragmented stream corridor with
reduced linear distribution of habitat
and edge effect
Loss of edge and interior habitat
Decreased connectivity and width within
the corridor and to associated ecosystems
Decreased movement of flora and fauna
species for seasonal migration, dispersal,
and population
Increase of opportunistic species,
predators, and parasites
Increased exposure to solar radiation,
weather, and temperature extremes
Magnified temperature and moisture
extremes throughout the corridor
Loss of riparian vegetation
Decreased source of instream shade,
detritus, food, and cover
Loss of vegetative composition, structure,
and height diversity
Increased water temperature
Impaired aquatic habitat diversity
Reduced invertebrate population in
stream
Loss of associated wetland function
including water storage, sediment
trapping, recharge, and habitat
Reduced instream oxygen concentration
Invasion of exotic species
Reduced gene pool of native species for
dispersal and colonization
Reduced species divversity and biomass
(b)
Activity has potential for direct impact.
Activity has potential for indirect impact.
FIGURE 8.5
(Continued)
Search WWH ::
Custom Search