April 11, 2021


We know our pets

Forest Journal: The place do the ants go marching? | Forest Journal

Anyone is aware of what an ant looks like. At this time of year, you could possibly catch a person wandering along the planks of your picket deck, or notice a line of them marching across your kitchen area counter, headed for the fruit bowl.

“Look! Ants!” you say, a little bit of dread soaring in your throat. It’s usually not a great indicator as a homeowner, but there are thousands of species of ants across the world and only a handful of of them consistently tangle with human beings.

In New England, there are about 140 species of ants identified to science, and they inhabit virtually each terrestrial habitat you can consider of, from forests to mountaintops, swamps and bogs to outdated pastures. Due to the fact they are so ubiquitous and so many — colonies of some species can easily have several thousand folks — ants play a sizeable position in quite a few ecosystems.

Kyle Bradford, a graduate scholar at Antioch College of New England (AUNE) in Keene, is fascinated in searching at ants as indicators of ecosystem health and fitness and resiliency.

“Ants are keystone species in quite a few habitats,” explains Bradford. “They can influence plant distribution and abundance by consuming or moving seeds, transform and aerate the soil in the course of nest developing, and they are masters at finding and devouring dead bugs. They also provide foods for several woodland animals, from woodpeckers to black bears.

Ants are even accountable for the distribute of quite a few of our treasured spring wildflowers like painted trilliums, bloodroot, and violets. These bouquets all produce seed with a lipid-rich attachment called an elaiosome that ants can’t resist. They carry the seeds again to their nests and feed the fatty elaiosomes to their larvae, leaving the seed to sprout in a new place.


Bradford and his faculty advisor, Michael Akresh, are at this time learning the ant communities that inhabit dry oak-pine barrens and heathlands, a globally imperiled habitat form. Oak-pine barrens and heathlands are fireplace-dependent purely natural communities, demanding disturbance in get to continue to keep other plant and tree species from invading and too much to handle them.

In New Hampshire, barrens and heathlands are split into quite a few organic communities observed in incredibly unique locations, such as barrens in Ossipee and Concord and dry, rocky ridges in the southern component of the condition.

Government companies and conservation landowners are significantly intrigued in restoring these habitats where by they have gone “past primary,” by manufacturing managed disturbances such as approved burns, selective timber harvests or qualified herbicide apps. Bradford is hoping the existence or absence of sure ant species may ultimately support land managers fully grasp irrespective of whether their restoration efforts in these habitats have been profitable.

The very first action in figuring out no matter if ants could be practical in gauging the health and fitness and high quality of heathland habitats is generating a baseline stock of which ant species are associated with regional oak-pine barrens and heathlands in the first position.

At the Forest Society’s Madame Sherri Forest in Chesterfield, one particular of 18 research web sites in the region, Bradford and industry technician Ryan Eagleson crawl close to on their arms and knees within just a 75-sq.-meter plot overturning rocks and investigating previous logs and chunks of downed wooden, on the lookout for ant nests. Using this process of “hand sampling,” they’ll have a set quantity of time to locate as quite a few nests as they can, gathering 3 to 5 employee ants for each colony, moreover samples of any random foraging ants they obtain outdoors of nests. Individual ants are picked up involving the thumb and forefinger and dropped into a little vial of 70% ethanol for preservation.

“You generally just pinch a leg to decide them up,” Bradford claims.


I consider the researchers remaining swarmed with angry, crawling ants from each individual disturbed nest, but he insists he’s by no means been stung or bitten even though sampling. “At the very least not tricky enough to break skin,” he adds cheerily.

When the sampling is entire, the preserved ants will need to be identified underneath a dissecting microscope. This is the enjoyment aspect, according to Bradford. “If you ever have a probability to look at ants underneath a microscope, they are seriously gorgeous and many are just strange wanting. Some have spines on the thorax, surprisingly formed or big heads that appear to be ridiculously outsized for their bodies, little beady eyes, or thick spoonlike hairs sprouting from them. It is nearly like a science fiction movie.”

From the 77 ants collected on two Madame Sherri Forest plots, Bradford has discovered 10 species, four of which are the to start with recorded for Cheshire County. He’s brief to issue out that this isn’t an indicator of the relative rarity of these species relatively, it’s proof of a deficiency of preceding sampling in the state. In close by Massachusetts, where by most of Bradford’s other review internet sites are situated, there are generally 4,000 to 5,000 historic specimen information for each county. Cheshire County had 106 records, and Bradford’s collections at Madame Sherri stand for a 73% raise.


“If you want to lead to scientific knowledge in New Hampshire, acquire photos of ants and upload them to iNaturalist,” Bradford states enthusiastically. Scientists and amateur naturalists can assistance determine them, and with some counties reporting only a handful of historic samples, you could just doc your very own county file.

Maybe unsurprisingly, there are no ant species discovered on the New Hampshire or the federal lists of endangered and threatened wildlife. “We just don’t have sufficient information to know what is condition endangered, or federally endangered, for that issue,” points out Bradford.

The troublemakers

There are a couple New England ant species on the worldwide Global Union for Conservation of Mother nature (IUCN) Red List, and all of them have one detail in widespread: they are all “parasitic” ants.

Parasitic ants consider the elaborate social and colonial firm witnessed in standard ant species a single phase even more, by requisitioning other ants and ant colonies to aid their own. Some parasitic species by no means produce any of their personal worker ants, and some others have to have to continually kidnap staff from other colonies to are likely and feed their larvae and queen. Some just get rid of off the queen of an existing colony and install their have queen to lay eggs, so that the entire colony is increasing imposter larvae.

As they mature, parasitic personnel mingle with their unwitting hosts until eventually, immediately after quite a few generations, the colony transitions totally to the parasitic species. Just one of the species determined at Madame Sherri Forest, Formica exsectoides (the Allegheny mound ant) is a community instance of these queen-supplanting parasites.

Diabolical lifestyle tactics may well not acquire parasitic ants any human sympathy, but simply because they cannot exist with out the existence of other healthful ant colonies, parasitic ants may be more inclined than other species to changes and degradation in their surroundings. This is what is most fascinating to Bradford, and he is spending individual attention to parasitic ant species in his individual exploration to see if their presence may well be a fantastic indicator of ecosystem integrity.

Most likely sometime, these ants could be the important to helping us comprehend what constitutes a healthier pine-oak barren or heathland.

“I like ants,” Bradford muses, “but mainly I appreciate thinking about ants as a way to solution appealing ecological concerns.”

Carrie Deegan is Reservation Stewardship & Engagement Director for the Culture for the Protection of New Hampshire Forests. Call her at [email protected]