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biologest · 17 days

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So I was watching a video on ptarmigans and it was mentioned that they dig burrows in the snow for shelter and protection. Which, cool! Burrowing bird! Then they showed this picture and

It's perfect

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biologest · 2 months

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Wait, which animals raise livestock?

Several species of ants will 'herd' aphids around (a type of plant lice)- even picking them up and putting them back with the group if they wander off. The ants will attack anything that approaches their aphid herds, defending them. The aphids produce a sugary excretion called honeydew, which the ants harvest and eat.

Some ants will even 'milk' the aphids, stroking the aphids with their antennae, to stimulate them to release honeydew. Some aphids have become 'domesticated' by the ants, and depend entirely on their caretaker ants to milk them.

When the host plant is depleted of resources and dies, the ants will pick up their herd of aphids and carry them to a new plant to feed on - a new 'pasture' if you will.

Some ants continue to care for aphids overwinter, when otherwise they'd die. The ants carry aphid eggs into their own nests, and will even go out of their way to destroy the eggs of aphid-predators, like ladybugs.

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Microhylids – or narrow-mouthed frogs - have an interesting symbiosis with Tarantulas.

While the spiders could very easily kill and eat the much-tinier frogs, and DO normally prey on small frogs, young spiders instead will use their mouthparts to pick up the microhylid frogs, bring them back to their burrow, and release them unharmed.

The frog benefits from hanging out in/around the burrow of the tarantula, because the tarantula can scare away or eat predators that normally prey on tiny frogs, like snakes, geckos, and mantids. The tarantula gets a babysitter.

Microhylid frogs specialize in eating ants, and ants are one of the major predators of spider eggs. By eating ants, the frogs protect the spider's eggs. The frogs can also lay their eggs in the burrow, and won't be eaten by the spider.

So it's less 'livestock' and more like a housepet - a dog or a cat. You stop coyotes/eagles from hurting your little dog/cat, and in return the dog/cat keeps rats away from your baby.

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Damselfish grow algae on rocks and corals. They defend these gardens ferociously, and will attack anything that comes too close - even humans. They spend much of their time weeding the gardens, removing unwanted algaes that might overtake their crop.

The species of algae that they cultivate is weak and and sensitive to growing conditions, and can easily be overgrazed by other herbivores. That particular algae tends to grow poorly in areas where damselfish aren't around to protect and farm it.

Damselfish will ALSO actively protect Mysidium integrum (little shrimp-like crustacians) in their reef farms, despite eating other similarly sized invertebrates. The mysids are filter feeders, who feed on zooplankton and free-floating algae, and their waste fertilizes the algae farms. Many types of zooplankton can feed on the algae crop, and the mysids prevent that.

While Mysids can be found around the world, the only place you'll find swarms of Musidium integrum is on the algae farms that Damselfish cultivate.

Damselfish treat the little mysids like some homesteaders treat ducks. Ducks eat snails and other insect pests on our crops, and their poop fertilizes the land. The ducks can be eaten, but aren't often, since they're more useful for their services than their meat.

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There are SEVERAL species of insect and animal which actively farm. They perform fungiculture and horticulture: deliberately growing and harvesting fungus and plants at a large-scale to feed their population.

Leaf-cutter ants and Termites both chew up plant material and then seed it with a specific type of fungus. The fungus grows, and the termites/ants harvest the mushroom as a food source.

Ambrosia beetles burrow into decaying trees, hollow out little farming rooms, and introduce a specific fungii (the ambrosia fungi), which both adults and larval beetles feed on.

Marsh Periwinkles (a type of snail) cultivates fungus on cordgrass. They wound the plant with their scraping tongue, then defecate into the wound so their preferred fungus will infect it and grow there. They let the fungus grow in the wound a bit, and come back later to eat.

#ants continue to be one of the coolest organisms on this planet

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biologest · 2 months

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Ancient redwoods recover from fire by sprouting 1000-year-old buds

Article | Paywall free

When lightning ignited fires around California’s Big Basin Redwoods State Park north of Santa Cruz in August 2020, the blaze spread quickly. Redwoods naturally resist burning, but this time flames shot through the canopies of 100-meter-tall trees, incinerating the needles. “It was shocking,” says Drew Peltier, a tree ecophysiologist at Northern Arizona University. “It really seemed like most of the trees were going to die.”

Yet many of them lived. In a paper published yesterday in Nature Plants, Peltier and his colleagues help explain why: The charred survivors, despite being defoliated [aka losing all their needles], mobilized long-held energy reserves—sugars that had been made from sunlight decades earlier—and poured them into buds that had been lying dormant under the bark for centuries.

“This is one of those papers that challenges our previous knowledge on tree growth,” says Adrian Rocha, an ecosystem ecologist at the University of Notre Dame. “It is amazing to learn that carbon taken up decades ago can be used to sustain its growth into the future.” The findings suggest redwoods have the tools to cope with catastrophic fires driven by climate change, Rocha says. Still, it’s unclear whether the trees could withstand the regular infernos that might occur under a warmer climate regime.

Mild fires strike coastal redwood forests about every decade. The giant trees resist burning thanks to the bark, up to about 30 centimeters thick at the base, which contains tannic acids that retard flames. Their branches and needles are normally beyond the reach of flames that consume vegetation on the ground. But the fire in 2020 was so intense that even the uppermost branches of many trees burned and their ability to photosynthesize went up in smoke along with their pine needles.

Trees photosynthesize to create sugars and other carbohydrates, which provide the energy they need to grow and repair tissue. Trees do store some of this energy, which they can call on during a drought or after a fire. Still, scientists weren’t sure these reserves would prove enough for the burned trees of Big Basin.

Visiting the forest a few months after the fire, Peltier and his colleagues found fresh growth emerging from blackened trunks. They knew that shorter lived trees can store sugars for several years. Because redwoods can live for more than 2000 years, the researchers wondered whether the trees were drawing on much older energy reserves to grow the sprouts.

Average age is only part of the story. The mix of carbohydrates also contained some carbon that was much older. The way trees store their sugar is like refueling a car, Peltier says. Most of the gasoline was added recently, but the tank never runs completely dry and so a few molecules from the very first fill-up remain. Based on the age and mass of the trees and their normal rate of photosynthesis, Peltier calculated that the redwoods were calling on carbohydrates photosynthesized nearly 6 decades ago—several hundred kilograms’ worth—to help the sprouts grow. “They allow these trees to be really fire-resilient because they have this big pool of old reserves to draw on,” Peltier says.

It's not just the energy reserves that are old. The sprouts were emerging from buds that began forming centuries ago. Redwoods and other tree species create budlike tissue that remains under the bark. Scientists can trace the paths of these buds, like a worm burrowing outward. In samples taken from a large redwood that had fallen after the fire, Peltier and colleagues found that many of the buds, some of which had sprouted, extended back as much as 1000 years. “That was really surprising for me,” Peltier says. “As far as I know, these are the oldest ones that have been documented.”

... “The fact that the reserves used are so old indicates that they took a long time to build up,” says Susan Trumbore, a radiocarbon expert at the Max Planck Institute for Biogeochemistry. “Redwoods are majestic organisms. One cannot help rooting for those resprouts to keep them alive in decades to come.”

-via Science, December 1, 2023

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biologest · 2 months

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every single day I think about how american black vultures are known for engaging in allopreening (preening between different species)

and they have a specific relationship with crested caracaras, in which the black vultures assist them by not only preening them after meals but also leading them to food in the first place— due to their superior sense of smell— while the caracaras assist the black vultures by acting as a warning signal in case of danger

and while this is more typical of black vultures, this is not common at all for any member of the falconidae family— it’s a special bond!

yet another post in favor of vultures everyone , hope you enjoy:) and I implore you to do some more research on these incredible birds !!

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biologest · 4 months

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ftr I am forever going to be bitter that the post I wanted to be "let's talk about extinct ecosystems and how cool they are!" got derailed into yet another post just talking about a single taxon like the millions of other posts on palaeoblr

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biologest · 4 months

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If you've never seen how pandas look when they're first born and you've never seen a mother panda carrying them there's no way to prepare you for it

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biologest · 4 months

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Saddest thing ever is reading an academic paper about a threatened or declining species where you can tell the author is really trying to come up with ways the animal could hypothetically be useful to humans in a desperate attempt to get someone to care. Nobody gives a shit about the animals that “don’t affect” us and it seriously breaks my heart

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biologest · 6 months

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Emeraldine, Ceroctena amynta, Noctuidae

Found in Mexico, Central America, and South America

Photo 1 by grahamwise, 2-3 by gussoni, and 4 by magazhu

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biologest · 8 months

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Cinnamon Teal (Spatula cyanoptera), male, family Anatidae, found in western North America and parts of South America

photograph by Clément Bardot

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biologest · 8 months

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Black-bellied Whistling Duck aka Black-bellied Tree Duck (Dendrocygna autumnalis), family Anatidae, Port Aransas, TX, USA

photograph by Alan D. Wilson

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biologest · 8 months

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Wood Duck (Aix sponsa), family Anatidae, SW Quebec, Canada

photograph by Bert de Tilly

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biologest · 8 months

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Willow Ptarmigan (Lagopus lagopus), in transitional plumage, family Phasianidae, Alaska

photograph by Kristina Ellis

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biologest · 9 months

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Bug of the Day

I was coming back in after a disappointing night at the lights last week, and came across this glorious chonkbeast on some Virginia creeper growing under my porch. This is a Pandora sphinx moth caterpillar (Eumorpha pandorus). Look at its squishy little donut feeties!!

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biologest · 9 months

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