Invasive Species of the Day (February 25): Coral Ardisia and Wild Hogs

Invasive Species of the Day (February 25): Coral Ardisia and Wild Hogs

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Coral Ardisia (Ardisia crenata):

 

photo courtesy of Les Harrison

Attractive red berries entice homeowners to use as a landscape plant but coral ardisia can quickly dominate adjacent natural areas. photo courtesy of Les Harrison

Coral ardisia is also known as coral berry, spice berry, and scratchthroat. It was introduced into Florida in the early 1900’s for ornamental purposes.

In the ensuing years, it has since it escaped cultivation and has become established in hardwood hammocks and other moist woods of natural areas and grazing lands. Populations can currently found in Florida, Louisiana and Georgia.

This evergreen sub-shrub reaches a height of 1.5 to 6 feet and tends to grow in multi-stemmed clumps. Leaves are alternate, 8 inches long, dark green above, waxy, without hairs, and have scalloped margins and calluses in the margin notches.  Flowers are typically pink to white in stalked axillary clusters, usually drooping below the foliage. The fruit is a bright red, globose, single-seeded berry, measuring approximately 0.25 inches in diameter. White-berried populations are also known to exist.

Coral ardisia is classified a Category I weed on the Florida Exotic Pest Plant Council Invasive Plant List.  Control of coral ardisia may be accomplished by two methods. A low-volume foliar application of Garlon 4 or Remedy provides suppression of this plant.  Complete foliar coverage is essential to success and re-treatment will be necessary for complete control.  Basal bark applications with Garlon 4 or Remedy in an oil carrier can also be utilized for suppressing this invasive weed. Do not apply more than 8 quarts of Remedy or Garlon 4 per acre and treat no more than ten percent of the total grazed area if applying greater than two quarts per acre.

More information is available at http://edis.ifas.ufl.edu/ag281.

For local assistance, contact your county UF IFAS Extension office.

For more information contact Les Harrison, UF/IFAS Extension Wakulla County – Agriculture & Natural Resources Extension Agent by phone at 850-926-3931.

 

Will Sheftall Natural Resources Agent with UF/IFAS Extension Leon County exams the impacts of invasive coral ardisia on local urban forests in Northwest Florida.

Wild Hogs(Sus scrofa):

Wild Hogs, also called Feral Hogs, are not native to the U.S.  Wild hogs are highly adaptable and can find suitable habitat easily.  Wild hogs can be all shapes, sizes and colors since they are hybrids of many different breeds.   Wild hogs sometimes resemble their domestic relatives but sometimes resemble their Eurasian backgrounds.

Wild hogs are probably the most prolific large mammals in the world.  They reach sexual maturity at a young age.  Females have multiple litters of 3-8 piglets per year.  Natural mortality rates are low.  Wild hog females and young live and travel in groups called sounders.  Sounders typically have 1 to 3 adults and several young.  When females reach maturity, they either stay with the sounder or they go out and form a new sounder with other young females.  Young males leave the sounder alone at about 16 months.

Wild hogs are opportunistic omnivores that feed by rooting and grazing.  This rooting behavior is why we consider them to be a pest.  The impact of wild hogs on the environment is soil erosion, decreased water quality, spread of other invasive plants, damage to agricultural crops, and damage to native plants and animals.  They have been documented as threats to threatened and endangered species.  They can significantly impact populations of reptiles, amphibians, small mammals, ground nesting birds and even deer.

Wild hogs pose a health risk to humans because they can carry numerous diseases and parasites.  Care should be taken when handling wild hogs.  Wear gloves, cover any open wounds, and wear clothing that can be cleaned thoroughly.

Wild hog damage to pond bank.  Photo by Jennifer Bearden

Wild hog damage to pond bank. Photo by Jennifer Bearden

Human hunting is the most significant cause of mortality in wild hogs, although hunting alone will not control hog populations in a good habitat.  The most effective way to remove wild hogs from a location is a combination of trapping and shooting.

In Florida, wild hogs may be hunted year round on private land (with permission of the landowner) and at night with no permit required.  Hogs may be trapped year round.  Wild hogs cannot be trapped and released onto public land.  Trapped wild hogs can only be transported with a permit from FDACS) to slaughter or to an approved Feral Swine Holding Facility.  For more information on Wild Hogs, go to:  http://edis.ifas.ufl.edu/uw322 and http://www.myfwc.com/hunting/by-species/wild-hog/ .

National Invasive Species Awareness Week (NISAW) – February 22-28, 2015

NISAW 2015Many plants and animals have been introduced to new regions for centuries, as people have discovered new lands.  These transient species are known as non-natives, and can become invasive. Invasive species occur throughout the world and may blend in, be nondescript or highly attractive; they can be plant or animal; terrestrial or aquatic; they may resemble or remind the viewer of something familiar; they may be very good at adapting to our climate and conditions which is how many invasive species get their foothold in an area.  And because they have not evolved alongside our native species, when introduced to areas lacking their natural predators, they can adapt and take off.

 

Conditions in the SE US are ripe for many invasive contenders.  Some species have been intentionally introduced and other species have been accidentally introduced. Some common invasive species include red imported fire ants, Kudzu, Privet, Chinese tallow, Japanese climbing fern, Chinaberry, and cogongrass, just to name a few on the tip of the iceberg.  These species are now out-of-control, and it is unlikely they will ever be eradicated from their new home.

In 2011 alone, the Department of the Interior spent more than $100 million on invasive species prevention, early detection and rapid response, control and management, research, outreach, international cooperation and habitat restoration in the US. (USFWS) This is a drop in the bucket when you consider in FY 1999-2000, nine Florida agencies spent $90.8 million on prevention, monitoring, control, and restoration efforts.  It is estimated that the annual cost of invasive plants, animals and diseases in losses to Florida’s agriculture is estimated at $179 million annually (www.defenders.org).

Much like a cancer can spread in the body, so too, when conditions are favorable can invasive species spread across the landscape.  Once established in the landscape eradication is expensive; ideally early monitoring is critical to understanding its movement and dispersal, coverage, and containment. Like cancers, early detection provides better opportunity to address the situation.  Within the landscape, an aggressive invasive can impact the entire ecosystem – causing a serious imbalance; followed by a cascade of impact via unforeseen collateral damage.

Take the newest aquatic threat of Lionfish.  The trophic impacts of lionfish could alter the structure of native reef fish communities and potentially hamper stock rebuilding efforts of the Snapper –Grouper Complex. Additional effects of the lionfish invasion are far-reaching and could increase coral reef ecosystem stress, threaten human health, and ultimately impact the marine aquarium industry. Control strategies for lionfish are needed to mitigate impacts.

Disturbances like new roads, land clearing, and tropical weather events (hurricanes) can all provide the opportunity for invasive species to get a foothold.  So, the next time you notice a plant or animal that you don’t recognize, take a picture and report it using the “I’ve Got One!” phone app or on-line to The Early Detection & Distribution Mapping System (EDDMapS.org). You can also report to  the nearest Extension Agent.

A good way to learn how to identify and control some of our common invasives is to join a volunteer workday at a park near you sponsored by the Six Rivers Cooperative Invasive Species Management Area (CISMA) or the Florida Native Plant Society.

GUEST AUTHOR:  Barbara Albrecht, Director of Panhandle Watershed Alliance, member is the Six Rivers Cooperative Invasive Species Management Area.

Living with Florida Snakes

Living with Florida Snakes

Warming temperatures have awaken snakes that have been dormant during the winter months.  As a result, they are more active during abnormal times of the day and move more than they typically do while searching for food.  This also means more people are likely to encounter with them.

Even though most snakes are nonvenomous, many people fear them and will go out of their way to kill them if an encounter occurs.  Interestingly, 95% of the humans bitten by snakes are either trying to catch or kill them; suggesting the best thing to do when encountering a snake is to leave it be.

Brush piles such as these attract snakes.  These should be kept away from where family members play.  They can actually be used to move snakes away from areas where you do not want them.  Photo: Rick O'Connor

Brush piles such as these attract snakes. These should be kept away from where family members play. They can actually be used to move snakes away from areas where you do not want them. Photo: Rick O’Connor

How can you reduce your chance of encountering a snake? 

Most snakes found around the house are either seeking suitable habitat or food.  Anything that could attract rodents or amphibians could attract snakes.  Overgrown landscaping, trash or brush piles, bird feeders, water features, garbage, and greenhouses are examples of snake attractants many people have.  To reduce your chance of an encounter you should move such items away from the house, and for those that you cannot – keep as clean as you can.  Snakes do not like to cross short grass, so a frequently mowed yard helps as well.  If you live near good snake habitat you may have to invest in silt fencing, or a similar product, that has a slick surface which is difficult to crawl over.  If placing silt fencing along the boundary you should have the wooden stakes on your side of the fence; snakes can climb these.

What do I do if I encounter a snake?

The first thing you should understand is that, like most animals, there is a zone around snakes in which they feel threatened.  When they detect you, they react as if you are the predator.  If you are outside their zone they will remain motionless.  If you cross the line, they will try to move away to avoid being attacked.  If they have nowhere to move they will turn and defend themselves; this could mean a strike.  If a snake is encountered, try not to move towards the snake and if you are already close try to give the animal an escape route.  Many will want to know if the snake is venomous.  Of the 46 species and subspecies of snakes in our state only six are venomous.  Of these, five belong to the family Viperidae and can be identified by the elliptical eye pupil, the triangle-shaped head, and the second set of nostrils (pits) on the snout.  These include the three species of rattlesnakes, the moccasin, and the copperhead.  One venomous snake, the Eastern Coral Snake, does not have the appearance of a viper.  The coloration of this snake is red, yellow and black with red touching yellow.  They also differ from their kingsnake mimics by having a black head.

This copperhead shows the elliptical pupil and pit commonly found in Florida's pit vipers.  Photo: Molly O'Connor

This copperhead shows the elliptical pupil and pit commonly found in Florida’s pit vipers. Photo: Molly O’Connor

If the unfortunate happens and a snake bites you, the first thing you should do is not get bit twice.  Many people react by trying to kill the snake and multiple bites can happen.  Nonvenomous bites should be washed with warm water and soap.  If the bite is from a viper, remember–do not get bit twice.  With venomous snakes many feel the hospital will need the snake for identification of the proper antivenin.  This is not necessary and, again, could lead to multiple bites.  Viper bites can be extremely painful and, if venom is injected, can induce severe swelling.  You should remove rings, watches, or any garment that may impede swelling.  Many of the traditional first aid treatments for snake bites can cause more harm than the bite.  It is recommended that you hold the bite below heart level if possible and calmly go to the hospital.  Coral snake bites are often undetected but are very serious and medical attention is needed.

As we approach spring, locals should be aware that the Florida Fish and Wildlife Conservation Commission is trying to track three species of local snakes; the Eastern Diamondback Rattlesnake, the Florida Pine Snake, and the Southern Hognose.  If you think you see one of these FWC would like to know.  A GPS mark and photograph is needed.  You can find the log site at FWC’s website: www.MyFWC.com.  For more information on snakes, contact your local County Extension Office.

This nonvenmous gray rat snake has a head shaped more like your thumb and the round pupil.  Photo: Molly O'Connor

This nonvenmous gray rat snake has a head shaped more like your thumb and the round pupil. Photo: Molly O’Connor

Our Recovering Florida Black Bear Population

Our Recovering Florida Black Bear Population

Florida Black Bear visiting an easy food source.

Florida Black Bear visiting an easy food source. Photo by Jennifer Bearden

Florida Black Bear are the largest land mammals in the state of Florida. At birth they are smaller than a soda can but they quickly grow up to 250-400 pounds for males and 125-250 pounds for females. Even though black bears are large animals, they are not fierce killers nor are they cute and cuddly. Bears are like most other wildlife; if you don’t bother them, they won’t bother you.

In 1974, bear population numbers were extremely low and the Florida Black Bear was listed as a state threatened species. Today, we have increased bear population numbers 10 fold to about 3,000 statewide.

bear ranges

Graphics courtesy of Florida Fish and Wildlife Conservation Commission

As urban areas have expanded into bear habitat, the number of bear/human interactions has increased. Bears are omnivorous with 80% of their diet coming from plants. Bears are fairly intelligent creatures that forage for easy food sources. Urban areas tend to attract nearby bears with food sources such as garbage containers, pet food dishes, and bird feeders. Bears become accustom to food sources near humans and lose some fear of humans and may even bluff charge humans to defend their food source. The best way to prevent this is to remove food sources.

 

  • Clean BBQ grills and store them in a secure building when not in use.
  • Take garbage to the curb the morning of pickup instead of the night before.
  • Store garbage cans in a sturdy building or other secure area.
  • Feed pets inside and store pet food securely.
  • Protect gardens and trees with electric fencing.
  • Hang wildlife feeders out of reach of bears and take them down if bears are in the area.

 

It is illegal to feed bears in Florida (Florida Administrative Code 68A-4.001(3)). In addition to being illegal, it isn’t smart. Feeding bears intentionally or unintentionally increases the likelihood of human injury, property damage and bear injury or death.

So what do you do if you encounter a bear?

  • Remain calm and don’t run!
  • Don’t approach the bear, instead give it space to retreat.
  • Back away slowly without looking the bear in the eyes.
  • Speak to the bear in a calm voice.
  • Bring children and pets inside.
  • Find a safe place then make a lot of noise to let the bear know it isn’t welcome – yell, bang pots and pans, raise your hands high and stand tall to scare the bear away.

Report Bear sightings to Florida Fish and Wildlife Conservation Commission at https://public.myfwc.com/fwri/blackbear/getlatlong.aspx

For more information on Florida Black Bears, you can visit MyFWC at http://myfwc.com/wildlifehabitats/managed/bear