One advantage of clear cutting is that less of these must be built to access the resource.
What is roads
100
nesting in large flocks, needing a large unfragmented habitat, producing few offspring and possessing valuable skin or horns are characteristics of species that are this
What is prone to extinction
100
The largest wetlands restoration project in the US is here
What is the florida everglades
100
Evaporation of irrigation waters can cause this problem which may eventually make the land unproductive
What is salination
100
sustainable agriculture regards the preservation of this as the top priority.
What is soil quality
200
Uneven aged timber management practices such as the seed tree and shelterwood methods are called this type of cutting method
What is selective cutting
200
A specie that may soon become extinct over all or part of its range is called this
What is endangered
200
These nontarget species are harvested during fishing and often thrown back int the sea dead or dying
What is by-catch
200
Drought and human activities such as overgrazing, soil compaction, and soil erosion can cause this problem
What is desertification
200
A drifting fish line with multiple hooks up to 80 miles long with thousands of hooks is called this method of fish harvesting
What is long line fishing
300
Forest managers often use this management tool to release nutrients into the soil, allow grasses and wildflowers to flourish on the forest floor and reduce the likelihood of catastrophic wildfires.
What is prescribed burning, controlled burning
300
The rapid doubling of water hyacinth in nutrient rich ponds or lakes is an example of this (water hyacinth grows and adds more nutrients to the water so even more water hyacinth grows)
What is positive feedback
300
This federal permit system allows for the filling and development of these ecosystems larger than three acres provided an area of equal size is created or restored
What is mitigation banking
300
Terracing and contour plowing can prevent erosion on farms located here
What is on slopes
300
This act protect the habitats of species in a state of decline in the US
What is the endangered species act
400
Fire suppression practices have resulted in increased fuel buildup on the forest floor and have imposed a greater risk of this destructive type of fire.
What is a crown fire
400
This five letter acronym treaty targets endangered species trade at the international level
What is CITES (convention on international trade in endangered species)
400
overharvesting these marine mammals has reduced populations to the point where 8 of 10 species is commercially extinct and nearly biologically extinct.
What is whales
400
This method of pest control uses predators or parasites, is target specific and can be self-perpetuating once established
What is biological control
400
A higher density of trees and more weakened trees susceptible to insects and disease is fostered by this misguided forestry practice of the 20th century
What is fire suppression
500
Widespread destruction and burning of tropical forests in the amazon has resulted in the conversion to this biome in many areas
What is savanna
500
The US endangered species act protects species that are identified as endangered by this agency.
What is National Marine Fisheries Service (NMFS) for ocean species or US Fish and Wildlife Service (USFWS) for all others.
500
The direct threat of climate change to marine habitats is this
What is rising sea levels
500
This is an ecological approach to pest control that uses a mix of cultivation and biological methods and small amounts of chemical pesticides as a last resort. It can lower pesticide costs by 50% without reducing yields!
What is Integrated Pest Management (IPM)
500
Utilizing forest resources by placing a value on their ecological services and harvesting trees no faster than their replenishment rate is called this
What is sustainable yield forestry or sustainable forestry.