First comprehensive look at effects of 2020-2021 California megafires on terrestrial wildlife habitat

The only thing constant is change — isn’t that how the saying goes? We know that wildlife in western forests evolved with changing habitat and disturbances like wildfire. Each species responds differently, some benefiting from openings, others losing critical habitat. What we don’t know is how increasing fire severity at large scales is impacting their habitat and survival, because many species are not adapted to these types of “megafires.” Researchers at the Rocky Mountain Research Station set about finding some answers. They summarize their findings in “The 2020-2021 California megafires and their impacts to wildlife habitat,” a paper that published today in the Proceedings of the National Academy of Sciences.

Why California and why this time period? In 2020 and 2021, California experienced fire activity unlike anything recorded in the modern record. When the smoke cleared, the amount of burned forest totaled ten times more than the annual average going back to the late 1800s. Nearly half of the forests that burned experienced high-severity fire, killing 75-100% of the vegetation, and much of this fire covered large continuous areas, rather than a patchy mosaic. California’s Department of Fish and Wildlife curates a comprehensive wildlife database, mapping habitat suitability of hundreds of species across the state. Coupling that with Forest Service records of wildfires and some fancy computer footwork gave researchers an opportunity to take a broad look at how these types of “megafires” are shaping wildlife habitat within the state.

Jessalyn Ayars, the lead author, said, “Our intent was to take a broad look to gain a better understanding of the impacts of these kinds of fires on wildlife habitat as a whole.” She continued, “and since each species is different, this study provides a good jumping-off point for others to be able to focus on a single species of interest or small group of species that share similar habitats.”

The fires and habitat studied were mostly located in the Sierra Nevada, southern Cascades, and Klamath mountain regions of California. Researchers looked at more than 600 wildlife species and found that for 50 species, fires spanned 15-30% of habitat within their range in the state. One hundred species experience high severity fire over more than 10% of their geographic range within California. Sixteen of those species are considered species of management concern, such as the great gray owl, wolverine, Pacific marten, and northern rubber boa.

Previous research shows that some species such as great gray owls may benefit from fire in terms of foraging habitat and can be somewhat resilient, but again, the unknown is whether that benefit holds true with this magnitude of habitat change in such a short time.

Some good news is that by looking more closely at some of the details around habitat change by species, scientists learned that these fires are not disproportionately impacting habitats for species of conservation concern compared to wildlife species in general, a finding that suggests that where these species live may serve as refugia for them.

Gavin Jones, senior author and Ayars’ advisor, has conducted research on how proactive forest management can offset risks over the long term of California spotted owl habitat loss from increased wildfire size and severity. Given the impacts of large-scale habitat shifts in a short period of time, coupled with the likelihood that extreme fires will be more common in the future, this new paper adds to the body of research and underscores the importance of increasing the pace and scale of proactive forest management.

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Perfecting the performance of nerve implants

Researchers are extending their understanding of the effectiveness of electrical fields that are increasingly being used in implants to stimulate and repair damaged nerves. Effective nerve stimulation is the key to helping alleviate debilitating conditions such as sciatica.

“From the soldier on the battlefield to people involved in car crashes the long-term effects of nerve injuries can severely affect sufferers,” said the University of Adelaide’s Professor Giuseppe Tettamanzi, Senior Lecturer, School of Chemical Engineering.

“Transcutaneous Electric Nerve Stimulation (TENS) is a commonly used electrical stimulation method in implants. Many of the current implants are quite invasive so it’s important to understand how to maximise their effectiveness.

“Simple electrical circuitry in an implant can be applied to damaged nerves to help repair and reconstruct them.”

This technology was invented by Professor Antonio Lauto from UWS, Sydney. The implants are surgically placed under the skin around the damaged nerve with power in early versions provided externally. Innovative graft-antenna implants that are powered wirelessly, are increasingly being used. They are minimally invasive devices that function both as a wireless stimulator and a structure around which nerves can rebuild. The implants use a gold band which produces an electrical field around it.

The team has used several sophisticated Computational Electromagnetic techniques incorporated in a mouse model to hypothetically examine the effect of the circuitry implanted via patches inserted near affected nerves. They published their work in the journal Bioelectromagnetics.

Luke Smith, who is leading author in this research, undertook an honours project in his final year of his bachelor’s degree project at the University of Adelaide under the supervision of Professor Tettamanzi and Professor Christophe Fumeaux, to explain the microscopic nature of the effect of electrical stimulation. He is currently undertaking a PhD at the University’s Australian Institute for Machine Learning.

“Our work shows that when the simple metallic circuitry in the patch inserted near the neuronal materials, is irradiated with the commonly used Transcranial Magnetic Stimulation (TMS), it acts as a focaliser for the electromagnetic signal that ultimately activates neurons in the neural material,” he said.

“This ultimately speeds up tremendously the process of repairing damaged neuronal material.

“Electrical stimulation of nerves is due primarily to the electric fields created at the edge of the ring which sets up high-intensity field gradients in a small region around it.

“Our computational model demonstrates that direct contact between the ring and nerve ensures neural activation.”

Nerve damage usually takes longer than three months to repair and sufferers are at increased risk of depression because of the debilitating effects of conditions like sciatica.

People suffering from pain due to nerve damage may need to resort to opioids for pain relief with all the associated risks of addiction and extra burden on health systems.

“This work, which is currently evolving, could benefit people with injuries and with neurodegenerative diseases. The knowledge that we have generated may help in future research,” said Professor Tettamanzi.

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The Most Common Issues People Bring Up In Therapy As They Get Older

As we age, past concerns may go to the wayside as new problems pop up. Maybe you feel more stable in your relationships, for example, but you also can’t drink as much because you feel extra anxious the morning after. In other words, each stage has its own joys and struggles.

While we’re all unique in some way, you’re probably less alone than you may think when it comes to those problems. Additionally, a multitude of coping skills can help you handle them, even as tough and emotional as they often feel.

Below, therapists share some of the topics they hear about the most from older clients, as well as how they help or advise clients to handle that distress.

Grieving All The Transitions

A lot of changes happen as you age, and grieving what had been is normal and understandable.

“I hear a lot about how difficult it is to start transitioning to retirement or getting older physically and mentally,” said Holly Humphreys, a licensed professional counselor with Thriveworks in Roanoke, Virginia, who works extensively with adults transitioning into retirement and who are 65 and older.

While this goes for losing loved ones, that’s not the only type of grief experienced. “Older adults can also go through the grieving process when they retire from their careers that they have been in for decades,” she continued. “They can also go through the grieving process when they start to notice a decline in either their or their significant other’s mental and physical health.”

What to do: Humphreys encourages her clients to feel their feelings, and she supports them along the way.

“I also assist with providing coping strategies to help older adults to better manage these feelings of anxiety and depression,” she said. “Likewise, I help with problem-solving to make sure they have all of the resources that they may need during this time in their life. Lastly, I provide supportive reflection to allow them a safe space to process their life up to this point and what they want out of their remaining time with their loved ones.”

While having a therapist who can help with this is a smart move, it may not be as accessible for everyone. If that’s the case for you, think of friends and family, and let them know what you need.

Navigating A Relationship With An Adult Child

As you age, your child does, too, which leads to a change in relationship dynamics.

“One of the most common topics I encounter in counseling with older adults is their relationship with an adult child,” said Alicea Ardito, a therapist with Choosing Therapy who specializes in working with older clients. “Patterns are often established in childhood and adolescence, and it can be a difficult adjustment for older adults to learn how to be the parent of an adult.”

What to do: It all comes down to communication and working together.

“We will often explore ways to improve communication, find connection and establish healthy boundaries in the relationship,” Ardito said. This might look like asking open-ended questions or engaging in activities you both enjoy, for starters.

Therapists say physical changes are something clients bring up a lot.

Eva-Katalin via Getty Images

Therapists say physical changes are something clients bring up a lot.

Struggling With Body Image

Kelsey Latimer, a clinical psychologist who has worked with older people, has heard many clients pick themselves apart, especially during times of change, transition and stress.

“The change can trigger a deep sense of instability, loss of control and fear of the unknown,” she explained. “Our mind can disconnect from those underlying things and tend to settle on thinking our bodies are the problem or the wrinkles on our face are why we feel a certain way.”

And, of course, societal beliefs don’t help. “The fact we live in a culture where the aging process is not one seen to be embraced places unrealistic expectations on people and can reinforce these feelings of instability during change,” she added.

What to do: If you struggle with this, Latimer encouraged dealing with your emotions directly, ideally with a professional or friends who are going through similar changes.

“Try to do the best you can to realize this is not about your body, sagging skin or wrinkles on your face — it’s a lot deeper than that,” she said. “Don’t suffer in silence — talk it through and find space for those emotions.”

Facing Regret

Aging often comes with reflection, as evidenced by psychoanalyst Erik Erikson. According to his work on stages of psychosocial development, older adults often spend time trying to contribute to the world and looking back on their lives. Did they fulfill their purpose and live life the way they wanted?

This is another commonly discussed topic in therapy. “Clients may reminisce about fond times and regrets, depending on their mood and thoughts during the present session,” said Joel Frank, a licensed psychologist in Los Angeles.

What to do: The three key words here are “validation,” “acceptance” and “change” — usually in that order. “For individuals reflecting on their past, especially their regrets, I typically validate their thoughts and emotions on the topic and work with them on moving toward a perspective of acceptance,” Frank said. While the past can’t be changed, he said, learning from it is crucial.

One aspect you can learn more about is who you are, focusing on your values and desires. “It is also the recognition that there is still time to develop new traits and hobbies, should they wish,” he said. This might look like being more kind, trying an art class or becoming more involved in your place of worship, though those examples only scratch the surface of all the possibilities.

Facing Lots Of Loss

Similar to grief, the aging process is full of loss, unfortunately. “This is a nonfinite loss that does not involve physical death, but there is a sense that the loss is enduring in nature,” said Venetia Leonidaki, a clinical psychologist who’s worked with clients across the lifespan. “For older clients, such a loss could involve having to let go of treasured habits, feeling nostalgic about an important time in life, or coming to terms with a drop in physical or mental strength.”

Another type of loss that encompasses many of the others: a sense of losing your identity.

What to do: Let yourself feel those emotions and try to move forward in positive ways, according to Leonidaki. She validated that even if the loss isn’t clearly visible, it’s valid and significant.

After coming to terms with that, what helps? “As a part of active coping, I’d also get them to focus on the things that they can do instead of those that they can’t,” she said. “Practicing gratitude for the significant things that continue to be present in their lives could also help them counteract feelings of loss.”

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