Severe Fires Drive Shifts from Black Spruce to Broadleaf Dominance

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  Severe late summer fires consume the soil organic layer, allowing deciduous tree species, such as aspen and birch, to establish at high densities. The fast decomposing litter and rapid evapotranspiration of deciduous trees maintain a thinner, drier organic layer that does not sustain spruce forests or insulate permafrost. This ecosystem state change alters an… Read more »

Browsing by Large Herbivores Influenced Ecosystem Function

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Browsing by moose and snowshoe hares affects plant species composition, growth, population dynamics, nutrient cycling, and ecosystem function at both stand and landscape scales, causing effects that can persist for decades. Both species selectively consume willows, leading to the dominance of alder, an important nitrogen-fixing species that is chemically defended against herbivory. Snowshoe hare abundance… Read more »

Started from the Benthos, Now We’re Here—a Holistic Approach to Lake Ecology

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Freshwater fish in a lake

In 2018, M. Jake Vander Zanden and Yvonne Vadeboncoeur were invited to give a plenary lecture at the International Society for Limnology (SIL) meeting in Nanjing, China. They spoke about their efforts to synthesize a more holistic understanding of the role of benthic productivity and food web pathways in lakes.  The two began their journey… Read more »

LTER at Ocean Sciences Meeting 2020

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In 2017, the LTER Network saw the addition of three new marine and coastal sites. The new sites—Northeast U.S. Shelf (NES), Northern Gulf of Alaska (NGA) and Beaufort Lagoon Ecosystems (BLE)—are all well-represented among the 41 talks and posters presented by LTER researchers at the 2020 AGU Ocean Sciences Meeting. Presentations from these and other… Read more »

You don’t know what you’ve got ‘til it’s gone – or at least threatened

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hemlock branches

Credit: Jack Pearce via Flickr (CC BY-SA 2.0)Species that are abundant often go ignored by conservation planning until an acute threat to their populations emerge – and by then, sometimes it’s too late. According to a new article in the journal Ecosphere, common species are often critically important as structural, dominant, or foundation species in… Read more »

Diverse soil improves plant diversity after all!

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It stands to reason that variable environmental conditions would support greater plant diversity, but few experiments have offered concrete support for the “environmental heterogeneity hypothesis.” In re-establishing tallgrass prairie, the correlation took over 15 years to emerge.

Can corals ride the tide of climate change?

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Damselfish and their coral host (Pocillopora eydouxi).

Researchers at Mo’orea LTER did not observe evidence that corals acclimatize to ocean acidification, but they did observe that some are more sensitive to it than others.

Loner Lizards Stress in Shared Shade

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Sceloporus jarrovi (Yarrow's spiny lizard)

Human introverts aren’t the only ones who get stressed in shared social environments. Lizards like patchy and spread out shaded spaces where they can avoid interactions with other lizards.

The fate of milkweed in a changing prairie system

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Grazers on the Konza Prairie.

There is a surprising connection between the loss of prairie habitat in the Great Plains and the fate of Monarch butterflies. They may not be iconic in the American West, but Monarchs are important pollinators and prey for other species – and their populations in the United States are in steep decline. This is due… Read more »

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