Red Lionfish are a predatory reef fish that are non-native invasive species and have spread throughout Florida Waters. They are members of the family Scorpaenidae whose members are venomous and the lionfish is no exception. This fish is relatively small ranging from 10-12 inches in length and have a zebra-like appearance with long, showy pectoral fins. They have a row of long dorsal spines that contain venom glands. Their native range is the South Pacific and Indian Oceans and preferred habitat is on offshore reef structures. These fish are considered to be voracious eaters feeding on native fish, reducing vital native populations, and competing for food with native fish such as grouper and snapper.
With few predators, these fish are thriving in Florida waters, even in the northern Gulf of Mexico. They reproduce often, under good conditions as often as every 3-4 days, with eggs hatching after about two days. They also consume a variety of local species. Research has found in some cases there has been an 80% decline in reef fish recruitment and loss of some economically important species. These fish are able to expand their stomachs for large meals and can survive starvation for over 12 weeks. Lionfish are an invasive species in our local waters and removal is encouraged.
The most effective control of this species is removal by spearfishing; though some recent reports of hook and line capture using live bait have occurred. Lionfish are cryptic and nocturnal but local divers have found them hovering near reefs at midday. Florida Fish and Wildlife Conservation Commission (FWC) changed regulations to increase harvesting opportunities. Such changes include no requirement for a recreational fishing license when using spearing devices (pole spear, a Hawaiian Sling, handheld net, or spearing devices marked for use on lionfish), and no recreational or commercial bag limit; though recreational fishing license is required for other fishing methods. Check the FWC regulations before fishing or diving for these species.
Lionfish are venomous, must be handled carefully, venom glands occur on the dorsal, pelvic and anal spines. Lionfish sightings can be reported at 877.786.7267, the newly released FWC lionfish app,or (if in the Pensacola area) the lionfish map. If stung the wound can be treated with warm (but not scalding) water. You may need to seek medical attention as soon as possible. Rarely are stings fatal unless the person has an allergic reaction. The Poison Help Hotline can be reached at 800.222.1222. Inshore sighting information is being collected by Florida Sea Grant in Escambia County to track the movement of these species. You can fill out the online report on the USGS website or the REEF website and stay up to date on research as it pertains to this species at the new NOAA lionfish portal and Florida Sea Grant.
For more information contact the author Rick O’Connor, UF/IFAS Escambia County Extension – Sea Grant and Marine Science Extension Agent, 850-475-5230.
Air Potato (Dioscorea bulbifera):
Large heart-shaped leaves completely cover this fence-row in Bay County. Photo by Julie McConnell.
Air potato is a tall climbing herbaceous plant that is in the yam family and can overtake natural and urban areas in a very short time. Air Potato uses twining tendrils that allow it to quickly climb over shrubs, trees, and man-made structures. The large heart-shaped leaves and potato looking “bulbils” that hang from the vine make identification fairly easy. The bulbils spread the growth of the plant, along with underground tubers. The plant will die back during the winter, but unless the vines, bulbils and underground tubers are removed, it will come back in the spring. The air potato is native to Asia and was introduced in Florida in the 1905. The potato is not good to eat and in some cases, may be poisonous.
There are a number of ways to control this species, and using a combination of methods may lead to greater success. Eliminating the vines and bulbils by collecting them, be sure to dispose of them where they will not be spread to other areas. The bulbils and underground tubers cannot survive freezing temperatures, so placing them in a freezer for a day and then disposing of them will help eliminate new growth.
Some cites in Florida have sponsored activities that involve the community in gathering air potato and other invasive species. Collecting the bulbils and underground tubers is easiest to do during the winter, when the green vegetation has dies back.
Herbicide treatments are best when applied during the late part of the growing season when plants are sending carbohydrates to the root system this is usually August through October. Wait as late as possible but before the leaves start turning yellow to apply. Yearly treatments may be needed to eventually eliminate the plant entirely. Apply herbicides according to the label on the herbicide container and apply with caution as not to spray other plants. For more information on types and strengths of herbicides to use in the fight against air potato, click here. If you have questions on using herbicides contact your local county extension office.
Biological controls are being tested in various parts of Florida using a beetle that was found to dine on air potato vegetation and tubers at different life stages. For more information on biological controls, click here.
Click here for an identification card for the air potato. For more information contact the author Chris Verlide, UF/IFAS Santa Rosa County Extension – Sea Grant Extension Agent, 850-623-3868.
Air Potato can spread quickly along the ground and into trees. Photo by Julie McConnell (click for larger image)
Florida is extending a warm welcome to a new pest! In 2012, the Kudzu bug made its first appearance in our state. And they are settling in to stay. The kudzu bug was first documented in the US in 2009 in Northeast Georgia. It has quickly spread throughout the southeast.
At first, a pest that attacks kudzu sounds pretty good but this bug also attacks wisteria, figs, and other legumes like beans and peas. It is a serious pest to soybeans that are grown in our area. They are similar to stink bugs and discharge an odor when disturbed. Skin and eye irritation can occur from this odor emission.
Kudzu bugs are small (3.5-6mm long), and are rounded oblong in shape, and olive-green in color. They lay egg masses in two rows of 13 to 137 eggs per row. The first generation of kudzu bugs seem to prefer to feed on kudzu but subsequent generations will feed on and lay eggs on other legumes. When fall comes, the adults over-winter where they can find shelter. They crawl under tree bark and into cracks in houses.
Kudzu Bugs feeding on soybean plants in Jackson County. Credit: Doug Mayo
If kudzu bugs make their way into your home, you can vacuum them up and dispose of them. If they are in your landscape or garden, you can set up a trap using a bucket of soapy water and a piece of white poster board. Kudzu bugs are attracted to lighter colors. To make the trap, cut the poster board in half. Attach the two halves by cutting a line up the middle of the two pieces and put them together. They should be in the shape of a plus sign. Place the board over the bucket of soapy water.
Insecticides can be used but timing and placement are very important. Right now, kudzu bugs are just becoming active making now a good time to spray kudzu host plants with an insecticide. Insecticide active ingredients ending in “-thrin” are effective against kudzu bugs. Controlling kudzu near your house will help decrease the number of bugs but they are strong flyers and can migrate through neighborhoods that aren’t near kudzu.
There are some natural enemies of kudzu bugs! Generalist predators like green lacewings, lady beetles, damsel bugs and big eye bugs will attack kudzu bug nymphs. There are also two parasitoids that attack them. A tiny wasp was discovered in 2013 that develops in the kudzu bug eggs. Also in 2013, a fly was discovered that lays its eggs in the adult kudzu bug.
Beach vitex expands its woody rhizomes aggressively; it can actually grow over sidewalks and driveways.
Originally from the Pacific rim of Asia, Beach Vitex was brought to South Carolina to help restore dunes lost during storms. Also known as round-leaved chaste tree and pohinahina, this low-growing shrub does very well in coastal habitats. The plant is a small, deciduous shrub that can grow to a height of 3 feet and forms root and rhizome masses extending over 60 feet from the parent plant. The stems are fleshy when young but become woody with age. The leaves are simple and measure 1 – 2.5 inches in length, are ovate, and dark green on top while lower surface is light green to silver. Locally it flowers in the spring producing beautiful purple to light blue flowers. The fruit forms in mid-summer and are charcoal gray color.
Rapid growth and dense fruit production allows this plant to quickly dominate dune habitats, in some cases covering over 85% of the dune field and crowding out natives such as sea oats. The plant is also known to produce its own chemical weapons to help outcompete native species. Coverage is so thick in some areas the term “beach kudzu” is now being used. Conservation groups believe that this dense growth will negatively impact sea turtle nesting (both for egg laying adults and hatching young). In 2009 the plant was listed on North Carolina’s Noxious Weed List and there is now a statewide task force to combat this invasive. It was first reported in our area on Pensacola Beach. There are 22 known properties on Pensacola Beach and it could very well be found in other panhandle locations. Just recently, beach vitex was listed with UF/IFAS as “invasive not recommended.” If you suspect you have the plant you may contact your local Extension office for information on how to safely remove it. For more information visit www.beachvitex.org
Click to download a “Wanted” Poster to share with neighbors and friends to lessen impact on our native species.
For more information, contact the author Rick O’Connor, UF/IFAS Extension Escambia County, Sea Grant/Marine Sciences Agent 850-475-5230.
Many 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.
Making the Big Sabine hike on Santa Rosa Island in February was COLD! A front had pasted over the day before and temp was in the 30’s with a north wind. But the sky was a beautiful blue and the Gulf was calm and clear.
The Gulf is smooth and clear most winter mornings.
Wildlands Environmental High School from Wisconsin making a dune hike on a cold Florida morning.
Joining me on my hike this month was the Wildlands School from Wisconsin. They were visiting the Gulf Coast working on a variety of projects and wanted to learn more about coastal ecology… so I brought them along. Because of the drop in temperature we did not see much wildlife. In January I saw very little other than birds. In February we saw few birds… it was really cold. As we hiked from the Gulf to the Sound we discussed barrier island and dune formation and showed many of the plants common in the different dune fields we mentioned in our January issue. Most were brown in color but there were a few evergreens and we even had one secondary bush blooming! Beach Heather (Conradina canescens).
Beach heather (Conradina canescens) blooming early in the year on a cold morning.
We did see a few mammal tracks and had a chance to discuss “animal sign” with the students, but no live animals were seen. The kids from Wisconsin were introduced to cactus (literally… many had it on their shoes) as we walked through the maritime forest and I had a chance to explain the xeric conditions found on our barrier islands and how this favored particular plants and animals. While in the maritime forest we also came across an old aquaculture facility and this gave me a chance to discuss this industry as well. But for me the most interesting discovery in the maritime forest was a “drag-line” that I had found in January near one of the ponds. As we walked past this area again – it was there again and seemed to be “fresh” (recently made). I am not sure what makes these drag marks – have a few guesses – but am hoping to discover the source before the end of this series.
Strange drag marks we have seen each month so far. They are found near one of the ponds on the Sound side.
Despite the north wind the Sound was calm and clear. Most of the marine creatures had moved into deeper-warmer waters but we did find a dead cannonball jellyfish. The students from Wisconsin got a chance to hold the slimy creature and we discussed how the stinging cells (nematocyst) work. These small cells on the tentacles of jellyfish have a triggering mechanism that is actually discharged by the object that touches it… the jellyfish does not do this. Once the trigger is moved a dart with a drop of venom is discharged into whatever triggered it. Several of these firing at once is what causes the pain we feel, or the death of a small fish. They were also excited to discover a primitive camp site that locals use. I explained the correct protocol for doing this and hope that locals do the same.
I found this along the shore last winter. These are cannonball jellyfish.
Though there was not a lot of wildlife to view in February but the beach is absolutely beautiful this time of year. The sunrises and sunsets are amazing. I encourage local “panhandlers” to visit your local island and take a long walk. I think you will enjoy it.
It’s Growing So Well It Must Be A Good Plant. Right?
Lantana camera
You know that plant in the corner of the yard that seems to be taking over? It’s the one that your friend “passed along” because they had plenty of them and wanted to share. After all, it grows so well. How can you go wrong? The odds are that vigorous plant is a non-native species. The majority of what is sold in nurseries are introduced from a foreign country and developed for their uniqueness.
The problem is that many of the plants brought into the United States arrive without their natural enemies. Under the long, warm growing season found in Florida, these non-native plants become the dominant plant in an area and manage to out-compete the native plants. When this happens, these introduced plants get labeled as an “invasive species”.
Nandina domestica
These invasive species threaten Florida’s environment, economy and health, requiring an estimated $120 billion a year to control them. Learning which of these plants have the potential to become invasive has been a focus of researchers with the UF/IFAS Center for Aquatic and Invasive Plants. They have spent more than a year developing a searchable website and database to help Floridians assess problem non-native plants. The website features more than 800 species, is easily searchable by common or scientific name, and the results can be filtered. The site helps predict the invasive potential. Each species is categorized as “caution”, “invasive not recommended”, or “prohibited” based on their ecological threat.
If you want to learn more about your friend’s ”passalong” plant be sure to visit the Assessment of Nonnative Plants in Florida’s Natural Areas website and database at http://assessment.ifas.ufl.edu/.
Soil Profile in Gadsden County. Photo by Jennifer Bearden
Many of us walk around daily and give no thought to what is under our feet. We do not consider soil a vital natural resource, but it is. And as with water and air, soil quality is very important to our society. Soils perform 6 functions in our ecosystems.
First it is a medium for plant growth. Plants root into the soil structure and stabilize the plant above ground. It holds nutrients, air, and water which the plants need.
Next, our soils regulate water supplies. Soil quality affects water quality. Contaminants and excess nutrients in poor soils can leach into groundwater. On the other hand, soils can purify poor quality water before it recharges groundwater supplies such as in septic tanks or rain gardens.
Soils also recycle nutrients needed for plant growth. If soils did not perform this function, plants and animals would exhaust the nutrients and there would be an increase in waste in our ecosystems.
Soils provide habitat for numerous organisms. An amazing amount of soil organisms exist hidden from our view. Earthworms, microscopic worms, bacteria, fungi and more call our soils home. These organisms play an important role in keeping our soils productive and our fields yielding crops.
Soils are also used as an engineering medium. For many years, humans have used soils to build and construct homes, roads, pottery and more. Just think of the roads and buildings that would not be here if we did not have soils.
Lastly, soils actually modify the chemical composition of the atmosphere. Air is a major component of our soils and it exchanges gases that are necessary for plant growth and microorganism survival. Also, dry, small soil particles can be picked up by winds causing human health concerns due to dust in the air we breathe.
So, is dirt just dirt or is it much more? I contend that without it, we would not be here today. So when you walk around today, consider the soil under your feet. It will not take long and you will see that soil surrounds us every day and is a very important natural resource.
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