Invasive Plants. What are they? Come into an area and out-compete native plants Usually do not...
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Transcript of Invasive Plants. What are they? Come into an area and out-compete native plants Usually do not...
Invasive PlantsInvasive Plants
What are they?What are they?
Come into an area and out-compete native Come into an area and out-compete native plantsplants
Usually do not have native predators (i.e. Usually do not have native predators (i.e. insects, grazing animals)insects, grazing animals)
Create a “mono-culture”- only one type of plant Create a “mono-culture”- only one type of plant in an areain an area
Often introduced:Often introduced: As ornamental garden plants, which “escape”As ornamental garden plants, which “escape” As “hitchikers” on ships or in cargoAs “hitchikers” on ships or in cargo For a purpose, with unintended resultsFor a purpose, with unintended results
What are they?What are they?
Often have different growth cycles than Often have different growth cycles than native plants (start earlier in the season)native plants (start earlier in the season)
Control methods can often lead to Control methods can often lead to increased propagation (more plants!)increased propagation (more plants!)
Purple LoosestrifePurple Loosestrife
Found in wet areasFound in wet areas Marshes, pond/lake Marshes, pond/lake
edges, riverbanksedges, riverbanks
Crowds out native Crowds out native wetland plantswetland plants Loss of habitat for native Loss of habitat for native
birds and insectsbirds and insects
A single plant can A single plant can produce over a million produce over a million seeds in a seasonseeds in a season
Japanese HoneysuckleJapanese Honeysuckle
Introduced as an Introduced as an ornamental and for ornamental and for erosion controlerosion control
Vine that smothers Vine that smothers low vegetation and low vegetation and chokes the growth of chokes the growth of trees and shrubstrees and shrubs
Can be controlled in Can be controlled in small areas but small areas but spreads quicklyspreads quickly
Eurasion Water MilfoilEurasion Water Milfoil
Spread by aquarium Spread by aquarium dealers and fishermen dealers and fishermen and boatsand boats
Quickly forms an Quickly forms an extensive root system extensive root system and crowds out native and crowds out native aquatic plants & fish aquatic plants & fish habitatshabitats
Low nutrient valueLow nutrient value Clog water intake pipesClog water intake pipes Create mosquito Create mosquito
breeding areasbreeding areas
Russian OliveRussian Olive
Shrub with fuzzy Shrub with fuzzy silvery leavessilvery leaves
Can resprout quickly Can resprout quickly after burning or after burning or cuttingcutting
Can fix nitrogen so Can fix nitrogen so can grow quicklycan grow quickly
Reduce water in soil Reduce water in soil and are drought and are drought toleranttolerant
Oriental BittersweetOriental Bittersweet
Vine with orange Vine with orange berries (used to berries (used to make wreaths)make wreaths)
Climbing vine that Climbing vine that twines around native twines around native plantsplants Can choke themCan choke them Weight of vine can Weight of vine can
pull down treespull down trees