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Climate Change & Invasive Species Many Questions, a Few Answers and Much to be Determined!. Climate change is underway, and to some extent, no matter what actions we take as a global community, its continued progress is guaranteed. An invasive species Non-native

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climate change invasive species many questions a few answers and much to be determined
Climate Change & Invasive Species

Many Questions,

a Few Answers

and Much to be Determined!

slide2

Climate change is underway, and to some extent, no matter what actions we take as a global community, its continued progress is guaranteed

slide3

An invasive species

  • Non-native
  • Negatively impacts other species
  • Reduces biodiversity
  • Interrupts the natural functions of an ecosystem

Invasive Species

can be:

Plants

Birds

Insects

Pathogens

Amphibians

Crustaceans

Mammals

Mollusk

Reptile

Fish

slide4

How Climate change facilitates the spread of invasive species

Increasing frequency of extreme weather events

Ability to alter critical components of natural systems such as

temperature

precipitation

atmospheric composition

land cover

slide5

What

do

invasive plants

do?

slide6

Invasive Plants in Riparian Areas

PLUS!

Changes in light/shade patterns over stream

slide7

CLIMATE CHANGE & INVASIVE SPECIES

WARMER TEMPERATURES

Hydrillaverticillatamay increase growth rates and biomass in elevated temperatures (Chen, 1994)

  • Southern invasive species marching northward
  • Example: Aerial view of a Southern Pine Beetle infestation. It is expanding northward with milder winters, killing trees &increasing fire risk
  • Expanded ranges - previously unable to overwinter (10% rule)
  • Growing season extended - plants may move without natural predators
  • Tropical pets - increased survival
  • Pathogens - increased reproduction
slide8

CLIMATE CHANGE & INVASIVE SPECIES

INCREASED STORM EVENTS

  • Flooding & erosion
  • Greater dispersal of upstream invasive species to downstream habitats
  • Example: lesser celandine can regrow from plant fragments
  • Facilitate the escape of harmful species from aquaculture
  • Example: escape of Asian carp into the Mississippi River
slide9

CLIMATE CHANGE & INVASIVE SPECIES

INCREASED CARBON DIOXIDE

  • Increased CO2 seems to favor growth of invasive species, in particular vines
  • Bigger plants = more seeds + better seed dispersal
  • Stronger roots = stronger herbicides
  • Major factor vine growth: freezing temperatures

Poison Ivy

Increase CO2 =

more leaf & stem production + more urushiol

slide10

CLIMATE CHANGE & INVASIVE SPECIES

IMPACTS ON NATIVE SPECIES

  • Changes in range
  • Changes in timing of natural events
  • Widespread forest loss (drought & warming create vulnerable trees)
  • Diminished habitat for native animals from dryer or wetter areas
slide11

CLIMATE CHANGE & INVASIVE SPECIES

WHAT SHOULD WE BE DOING?

  • Prevent the spread of new (emerging) invasive species
  • Learn which species are present in small numbers in your watershed
  • Learn which species are likely to invade your watershed
  • The Keys
  • Monitoring
  • Early Detection
  • Rapid Response
  • More Monitoring
  • The Tools
  • New Jersey Invasives
  • New Jersey Invasive Species Control
  • Sweat Equity
  • Grow Natives