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The Conversation USA

Trees compete for space, light and resources, and those clashes can leave battle scars

  • Written by Wayne K. Clatterbuck, Professor Emeritus of Silviculture and Forest Management, University of Tennessee
imageCrown shyness creates channel-like gaps between treetops.Jordan Lye/moment, via Getty images

When you walk through a forest, it may feel like a static setting where very little is happening. But trees are constantly interacting and reacting to each other as they grow. There’s intense competition for light and space. Every shift affects the...

Read more: Trees compete for space, light and resources, and those clashes can leave battle scars

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  1. Students with mental health struggles linked to absenteeism and lower grades, showing clear need for more in-school support
  2. Local elections are less partisan because voters will cross party lines when issues hit close to home
  3. Kamala Harris’ sudden political rise echoes that of another female politician, New Zealand’s Jacinda Ardern
  4. How back-to-back hurricanes set off a year of compounding disasters for one city − and alarm bells about risks in a warming world
  5. 3 years after fall of Kabul, US Congress has still not acted to secure future of more than 70,000 Afghan evacuees in US
  6. Ukraine’s cross-border incursion challenges Moscow’s war narrative – but will it shift Russian opinion?
  7. Historians diving for balloons and hoping for hot dish: What Smithsonian curators will be doing at the Democratic National Convention
  8. Offensive names dot the American street map − a new app provides a way to track them
  9. Americans love free speech, survey finds − until they realize everyone else has it, too
  10. Fluid keeps your brain from crushing itself and shields your spine from shock – a neurologist explains what happens when it stops working
  11. Future lawyers learn key lessons from studying poetry in parks in this course
  12. Philly schools are in disrepair − the municipal bond market is 1 big reason
  13. 3 of Jane Austen’s 6 brothers engaged in antislavery activism − new research offers more clues about her own views
  14. Kamala, a common name in India, is associated with several deities and is a symbol of wisdom
  15. LGBTQ people have a troubled relationship with police − new survey shows high rates of harassment, abuse and distrust
  16. Even fictional presidents don’t look like Kamala Harris − although Black men and white women have been represented in the Oval Office
  17. SpaceX’s Elon Musk endorsed Donald Trump for president – what this could mean for US space policy
  18. Hotel guests are getting used to refillable shampoos and less housekeeping, study suggests
  19. International students will offer a big boost to the US economy this back-to-school season
  20. How Ohio schools reduced chronic absenteeism
  21. Wildfires don’t just burn farmland − they can contaminate the water farmers use to irrigate crops and support livestock
  22. JD Vance is no pauper − he’s a classic example of ‘poornography,’ in which the rich try to speak on behalf of the poor
  23. Mammary glands in a dish − what miniature organs reveal about evolution, lactation, regeneration and breast cancer
  24. FDA rejects MDMA-assisted therapy for PTSD treatment – a drug researcher explains the challenges psychedelics face
  25. Dementia risk factors identified in new global report are all preventable – addressing them could reduce dementia rates by 45%
  26. 3 strategies to help college students pick the right major the first time around and avoid some big hassles
  27. A bipartisan data-privacy law could backfire on small businesses − 2 marketing professors explain why
  28. New storm is headed for the Caribbean: What meteorologists look for in early signs of a future hurricane
  29. Birth of a hurricane: What meteorologists look for as they hunt for early signs of a tropical cyclone forming
  30. At its core, life is all about play − just look at the animal kingdom
  31. Could dinosaurs still exist somewhere in the world? A paleontologist explains
  32. Why is an ultimate goal called a ‘Holy Grail?’
  33. If you want Americans to pay attention to climate change, just call it climate change
  34. Wagner Group setback in Mali challenges Moscow’s strategy in Africa and the region’s faith in Russian mercenaries
  35. A packed Baltimore trolley illustrates the ups and downs of US public transit
  36. Rat poison is moving up through food chains, threatening carnivores around the world
  37. No credit score? A grocery list could be the next best thing
  38. The problem with pronatalism: Pushing baby booms to boost economic growth amounts to a Ponzi scheme
  39. Despite Donald Trump’s claims, his gag order holds up against the Constitution
  40. How San Francisco’s Democratic political machine led to Kamala Harris’ presidential campaign
  41. The real ‘Big Bang’ of country music: How Vernon Dalhart’s 1924 breakthrough recordings launched a genre
  42. Infectious diseases spike when kids return to school − here’s what you can do about it
  43. Dealing with election anxiety? A psychiatrist explains how to channel your fears and break out of tribal thinking
  44. This anthropology course looks at building design from the standpoint of different species
  45. Paris Games herald a new anti-corruption era, but carrying the torch may pose an Olympic challenge for the US
  46. How do breakdancers avoid breaking their necks?
  47. Decades on, Delbert Africa’s surrender still provides powerful image of US racism and Black victimhood
  48. From Michael Brown to Sonya Massey, a decade of police antiblack violence causes grief, worry and coping for Black parents
  49. Good flooding? Scientists use rice cultivation to preserve soil in Florida’s Everglades Agricultural Area
  50. From a pig as political candidate to a breakout speech for Obama − Democratic National Convention often leaves its mark on history