Displaying items by tag: soil type
There’s a whole world in the dirt beneath your feet
The Dust Bowl of the 1930s resulted in the displacement of tons of soil in the midst of a drought similar to the one that grips the Southwest today. Library of CongressDirt is far from just dirt. It’s a foundation for life.
This story was originally published by The Revelator.
Look down. You may not see the soil beneath your feet as teeming with life, but it is.
Better scientific tools are helping us understand that dirt isn’t just dirt. Life in the soil includes microbes like bacteria and fungi; invertebrates such as earthworms and nematodes; plant roots; and even mammals like gophers and badgers who spend part of their time below ground.
It’s commonly said that a quarter of all the planet’s biodiversity lives in the soil, but that’s likely a vast understatement. Many species that reside there, particularly microorganisms such as viruses, bacteria, fungi and protists, aren’t yet known to science.
- the revelator
- soil type
- soil moisture
- why is soil important
- drought
- soil microbe
- biodiversity
- soil microorganism
- nutrient cycling
- reading university
- climate change
- soil degradation
- plastic pollution
- genetically modified organism
- pesticide
- artificial fertilizer
- land use change
- compaction
- erosion
- convention on biodiversity
- soil biodiversity observation network
- global soil biodiversity initiative
- ecosystem research
- multidimensionality
- macroecology
- farm to fork strategy
- microbial transplants
- soil quality
- soil sealing
Marking points in time: The Hal DeSelm Papers
A life dedicated to the flora of Tennessee
Dr. Hal DeSelm clambered around the crest of Cherokee Bluff in the heat of a late Knoxville summer 22 years ago. The Tennessee River flowed languidly some 500 feet below. Beyond the river stood the campus of the University of Tennessee Agriculture Institute. The towers of the city center rose to the northeast beyond the bridges of the old frontier river town.
DeSelm was not interested in the views of the urban landscape below. He was interested in the native trees, shrubs, herbs and grasses that clung to the ancient cliffside with firm but ultimately ephemeral grips on the craggy soil.
The retired UT professor, a renowned ecologist and botanist who died in 2011, had been sampling the terrestrial flora of Tennessee for decades. The life-long project took on a new urgency in the early 1990s, when he accelerated his data collection in hopes of writing the authoritative guide to the natural vegetation native to the forests, barrens, bogs and prairies of pre-European Tennessee.
Between 1993 and 2002, DeSelm collected 4,184 data points from 3,657 plots across the state. Many of those plots have since been lost to development, highways, and agriculture, or overrun by exotic species, but he assembled an invaluable baseline of the native landscape. Many of the sites he recorded have since been lost to development.
- science
- botany
- botanist
- Tennessee River
- native plant
- native tree
- native herb
- native grass
- native shrub
- Tennessee
- University of Tennessee
- terrestrial flora
- barren
- cedar barren
- ecologist
- Hal DeSelm
- Cherokee Bluff
- University of Tennessee Agricultural Institute
- native landscape
- preEuropean Tennessee
- natural vegetation
- sampling plot
- 1993
- 2002
- exotic species
- invasive species
- Todd Crabtree
- Tennessee State Botanist
- Natural Heritage Program
- conservation
- understory
- canopy
- ground cover
- herbaceous growth
- geology
- bedrock
- soil type
- forest
- conservationist
- database
- collection
- baseline data