Recent research in Science concludes that high forest productivity relies on the presence of diverse tree species—a relationship that apparently hold true in biomes across the globe.
Barrier islands’ harsh conditions, including nutrient and freshwater limitations and extremes of light and temperature, along with frequent large-scale disturbances, such as hurricanes, limit the number of plants species able to survive. As a result, successional trajectories can be convoluted.
The ice-covered lakes in the McMurdo Dry Valleys, a polar desert, rely on glacial melt for almost all their inputs. A recent study of Lake Fryxell suggests that in this environment even small changes in climate can impact biological productivity in the lake.
A recent experiment examined the impacts of increased nitrogen on salt marshes—and the all-important microbes within them.
Each forest reflects a legacy of past disturbances—from the literal detritus left behind a storm or fire to the prominence of particular species traits that enable species to bounce back after a specific type of disturbance.
How can researchers project the ways in which land-use changes will affect ecosystem services when they don’t yet know what course development will take? Integrated scenario analysis models several possible trajectories to examine the interactive effects that land-use change could have on ecosystem structure and function.
What information is needed to predict where fires will start in desert grasslands and how big they will get? Soil type turns out to play a larger role than expected.
Nitrogen enrichment can dramatically change the existing environment for plants and typically leads to increased productivity, decresed diversity, and shifts plant community composition. But what mechanisms are responsible for these changes? Researchers designed a multi-site experiment to find out, experimentally manipulating each of three possible drivers across mesocosms of three ecosystem types (tall grass prairie, alpine tundra, and desert grassland).
New analyses demonstrate that long-term nitrogen enrichment substantially changes the community composition of soil fungi in a temperate hardwood forest. The mix of fungal taxa that emerges appears to be better able to tolerate high nitrogen but less able to break down the lignin in organic matter, which contributes to an overall accumulation of soil carbon.
Do arts and humanities programs at LTER sites further the Network’s mission? Recent research posits that art-humanities-science collaborations generate empathy – and associated emotions like inspiration, awe, and wonder – for the natural world. This empathy then drives society to engage with and care more broadly about nature.
