Invasive, Endangered and Reintroduced Species of PA

Alexis GresslyPd.1

What is an Endangered Species???

A species who’s population is declining; if the species is not saved then it faces extinction.

The 5 most common reasons for endangerment….

Habitat Desruction The Introduction of Foreign Species into their

habitat Overexploitation Natural Causes Human Intervention

How can we prevent Endangerment?

Control the pollutionLimit Human Intervention

Building dams, deforestation, testing on the plants and animals.

Build National Parks so protect the animals/plants that are on the border of extinction.

Endangered Animals

Least ShrewCryptotis parvaNatural Predators kill the Least Shrew.

Endangered Animals

Indiana BatMyotis sodalisThe disturbance oftheir colonies by human interactioncause endangerment.

Endangered Animals

Delmarva Peninsula Fox SquirrelSciurus niger cinereusThe are on the endangeredlist because their historical population is diminishing

Endangered Plant Species

North Eastern BulrushScirpus ancistrochaetusDevelopment of land and land practices

endanger this species.

Endangered Plant Species

Small Whorled PogoniaIsotria medeoloidesUrban expansion is destroying their habitats.

Invasive Species: Segment 2

What does this mean???

Native Species- a species that normally lives and thrives in a particular place.

Introduced Species- a species that is accidentally brought into another ecosystem from human intervention.

Invasive Species- a foreign species who, when introduced into an enviroment, could destroy it.

Most common ways invasive species get into our country

Human InterventionMortality and Natality rateImmigrationFood Sources are abundantHiding from a predator

Most common ways invasive species negatively affect our enviroment

Eat the main food source(s) for that specific enviroment

Bring in diseaseKill off some other species intentionallyTake up the space meant for the native

species

Invasive Animal SpeciesSpiny Water FleaBythotrephes cederstroemiThey mostly live in freshwater systems.They don’t really have a role in their environments.

They do control the plankton population.They don’t cause many problems either.

Invasive Animal Species Red Eared- Slider Turtle Trachemys scripta elegans They inhabit in most freshwater systems like ponds and lakes. The turtles can be very aggressive toward mating with the

native turtle species. They contribute to the environment by providing a food

source for predators to survive and control the fish population.

Invasive Animal SpeciesSea LampreyPetromyzon marinusThey will would other fish because of the competiton

for food and mating.Their natural environment is coastal and freshwater

systems.They eat the native fish and decrease that

population.

Invasive Plant SpeciesPurple LoosestrifeLythrum salicaria They inhabit disturbed and healthy wetland habitats.They can rapidly degrade wetlands making them

diminish in size.Their role in the environment is that they can take

over wetlands with speed.

Invasive Plant SpeciesHydrillaHydrilla verticillataTheir niche in the environment is that they compete

for sunlight and may destroy plants in the process. They can also displace plants such as pondweeds and eelgrass. This is also a problem they pose.

They live in freshwater and marine habitats.

Reintroduced Species Segment

Definition of Invasive and Reintroduced Species

Invasive Species- a foreign species whose introduction into the specific environment is likely to cause environmental , economical, or human harm.

Reintroduced Species- the deliberate release of a certain species into the wild in places inhabited by the native species

Example of Reintroduced Species

Pennsylvania Elk populationTheir population had gone extinct in North

America and commissioners had relocated them to many state including Pennsylvania. Reintroducing the population has helped their population return to stable number.

Work Cited www.endangeredspecie.com www.actoceana.org www.portal.state.pa.us www.earthsendangered.com www.defenders.org www.fishstate.pa.us www.invasivespeciescouncil.com www.dcnr.state.pa.us www.mhhe.com www.fws.gov