keystone species Archives - Page 2 of 2

The FWP weekly digest of wondrous wildlife happenings
and other interesting items from the natural world

Creatures to meet | Things to learn
Things to do

Lisa S. French

If the Brazilian tapir’s eye-catching ensemble of creature features brings to mind ancient beasts, that’s because the shy, primarily nocturnal South American megafauna is one of the oldest species of large mammal remaining on Earth. The origins of this floppy-nosed, bristly-maned, odd-toed ungulate date back approximately 35 million years. For the ungulate-uninitiated, tapirs are Perissodactyls, hooved herbivores who like their closest relatives horses and rhinoceros, possess an odd number of toes. The Brazilian, or lowland, tapir is one of four widely recognized species of tapir native to the forests, grasslands, and mountains of Central and South America and Southeast Asia.

Measuring five to eight feet long and weighing between 300 and 700 pounds, the Brazilian tapir maintains its impressive bulk by consuming up to an equally impressive 85 pounds worth of shoots, leaves, branches, and fruit a day. As it turns out, the tapir’s hearty appetite for seed-bearing plants plays an important role in restoring degraded rainforests. According to researchers at Ohio State University, 80 percent of trees in the Amazon are dependent upon animals for seed dispersal. One of the primary “gardeners of the rainforest” tapirs ingest and expel a large variety of seeds that have future tree potential. Results of a recent study carried out by scientists at the Amazon Environmental Research Institute in Mato Grosso, Brazil, found that 99 percent of 130,000 seeds passed through a tapir’s digestive systems intact. Seeds that survive the digestive process are more likely to germinate. And here’s where it gets more ‘oh, wow’ interesting: the Mato Grosso study suggests that tapirs may prefer to browse and graze in degraded plots of land rather than in unspoiled forest. When sunlight hits the earth as a result of tree canopy loss in burnt or degraded areas, it forces up and reveals tender green shoots from the forest floor that are attractive to tapirs. The tapirs observed in the study spent about twice as much time feeding in degraded plots resulting in more seed “deposits” in areas in need of reforestation.

In the Amazon, wildlife depend upon healthy forest systems, and as the Ohio State and Mato Grosso research indicates, healthy forest systems depend upon wildlife. The Brazilian tapir’s natural capacity to contribute to tree planting can be an important factor in helping to regenerate carbon-storing, rainforest habitat. That is why protecting an umbrella species like the tapir also serves to protect other animals in its ecosystem.

Despite their aptitude for seed dispersal, Brazilian tapirs alone can’t compensate for elevated rates of Amazon deforestation. In addition, as a result of rapid habitat loss due to wildfires and ongoing land-use change, as well as illegal hunting, populations of Brazilian tapirs are decreasing and currently listed as vulnerable by the IUCN. The good news is you can help keep the hooved horticulturalists of Central and South America in their gardening groove by supporting the tapir research of Nai Conservation and the conservation action plans of the Tapir Specialist Group.

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Lisa S. French October 2, 2019

Roaming Room

We share our home planet with an awe-inspiring abundance of living things. The official cohabitant count stands at 8.7 million identified species, give or take, which represents only 15% of the estimated total number. From the smallest microorganisms to the largest mammals and most complex ecosystems, biological diversity—the diversity within and between species—supports the healthy functioning and maintenance of the interdependent environmental systems we rely upon to thrive. One of the most consistent threats to the creature components of biodiversity is accelerating land-use change resulting in degradation and loss of habitats and wilderness areas. According to the most recent Living Planet Report, only 25% of the world’s land surface can now be considered wilderness, 70% of which is concentrated in just five countries: Australia, Canada, Russia, the United States, and primary keeper of planetary lungs, Brazil.

The ongoing modification of Earth’s natural landscapes is forcing an increasing number of mammals, birds, reptiles, and amphibians from wild places to fragmented in-between spaces. These isolated remnants of habitat prevent animals from moving freely to find food, migrate, reproduce, and maintain biological variety, resulting in diminished and endangered populations globally. Loss of keystone species, which play a critical role in the functioning of food webs, also increases pressure on and reduces the resilience of ecosystems, putting them at risk of collapse.

Since 1970 global wildlife populations have plummeted by an alarming 60%. One of the most effective things that we can do right now to conserve terrestrial biodiversity is to protect and restore wilderness areas and ensure ecosystem connectivity through the creation of networked wildlife corridors that link larger areas of native vegetation to facilitate the safe passage of species from butterflies to bighorn. Wildlife corridors can be manmade, like Africa’s first dedicated elephant underpass in Mt. Kenya National Forest, or naturally occurring, like the Terai Arc Landscape in Nepal. Enlarging corridor systems and protected areas holds the potential to save threatened and endangered native species and restore habitat across the world’s last remaining biodiversity hotspots.

We are in, and we are of, the interconnected web of life. It sustains us all physically, spiritually, culturally, and economically. Making room for the wild ones through the restoration and protection of the places that they roam and call home will help to ensure the future health, wellbeing, and survival of all cohabitants of the living world. To borrow from author Rick Bass, “If it’s wild to your own heart, protect it. Preserve it. Love it. And fight for it.”

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Lisa S. French August 31, 2019

Evolving Elephants

Unlike their Asian elephant cousins, both male and female African elephants grow tusks over the course of their lifetimes which they use for defense, debarking and moving trees, and digging for roots, salt, and water. These long incisors used as tools for daily living have made elephants targets of ivory poachers across the continent of Africa for centuries and to devastating effect. While it is extremely rare for male African elephants to be born without tusks, the 3 to 4 percent of wild female African elephants that never grow tusks have a distinct evolutionary advantage as they are more likely to survive periods of intense poaching. Scientists believe that through the process of natural selection, tuskless female elephants are passing this trait on to their daughters. As intensely hunted big tusked male elephants, known as tuskers, are eliminated from the population through poaching, the offspring of smaller tusked males and tuskless females spread the tuskless trait.

Researchers are now studying tuskless populations in heavily poached areas across Africa to determine what this growing phenomenon means for the future of the species. According to Dr. Joyce Poole of Elephant Voices, 51 percent of 200 adult females 25 years or older in Gorongosa National Park in Mozambique that survived the rampant poaching that took place during the 15-year civil war are tuskless. Since the civil war ended in 1997, 32 percent of female elephants born in Gorongosa are tuskless. In the early 2000s in Addo Elephant National Park in South Africa, 98% of 174 females were also observed to be tuskless. While current populations of tuskless elephants appear to be healthy and thriving, scientists are continuing to study the impact of tusklessness on both individual and group behaviors as well as on other plant and animal species in their native ecosystems. Through critical ongoing research, we’ll learn more about how these iconic, highly intelligent, and empathic animals are continuing to evolve and adapt to the growing human-induced pressures that impact their survival.

For breathtaking photos of some of Africa’s last great tuskers, check out Land of Giants by Will Burrard-Lucas.

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Lisa S. French March 19, 2019

Hoppy They’re Here

Pop quiz! What can be found on every continent except Antarctica, fits in the palm of your hand, comes in 4,740 different models, amazingly eye-popping colors, and drinks and breathes through its skin? Hint: it’s not the iPhone 30X. It’s a humble hopper–the frog. Last fall, a particularly tiny, bright green member of the frog family, the Pickersgill’s reed frog, made a big splash in biodiversity conservation when two hundred of the endangered amphibians were returned to the only place they call home, a 56-square-mile patch of habitat in coastal South Africa. So, why the tiny frog fuss? This particular army of frogs was raised in captivity by scientists working to rapidly breed species on the brink of extinction, one of many global teams rushing to conserve threatened wildlife.

While they may not take up much space in our minds or on the planet, frogs are important because they are a keystone species, a critical link in the chain of organisms that support functioning ecosystems, benefiting both humans and other animals. Sticky-tongued frogs are natural bug zappers, eating a variety of insects including the disease-carrying mosquito. They are also a food source for larger species including fish, birds, and monkeys. Pre-frogs, otherwise known as tadpoles, do their bit to help to keep waterways clean by eating algae. And because frogs are super-sensitive to environmental stressors, a typically frog-friendly habitat that becomes frog-free can alert us to changes in climate, air and water quality. Conserving the creature components of global ecosystems, even the tiny, green ones, keeps interdependent living parts of the natural world healthy and that’s a wonderful thing. If you’d like to support the preservation of forest and wetland habitats for our amphibian friends, hop on over to WWF.

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Lisa S. French January 5, 2019