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Shrub expansion and alpine plant community change: 40-year record from Niwot Ridge, Colorado
Plant Ecology & Diversity, 2019Background: Alpine and arctic tundra are particularly sensitive ecosystems to the impacts of global climate change. Yet, warming studies versus observational studies in these ecosystems yield different and sometimes conflicting results.
Klara Scharnagl +2 more
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Carbon isotopes reveal soil organic matter dynamics following arid land shrub expansion
Oecologia, 1997Over the past century, overgrazing and drought in New Mexico's Jornada Basin has promoted the replacement of native black grama (Bouteloua eriopoda Torr.) grass communities by shrubs, primarily mesquite (Prosopis glandulosa Torr.). We investigated the effects of shrub expansion on the distribution, origin, turnover, and quality of light (LFC) and ...
S L, Connin +2 more
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Oecologia, 2020
Warming-induced nutrient enrichment in the Arctic may lead to shifts in leaf-level physiological properties and processes with potential consequences for plant community dynamics and ecosystem function. To explore the physiological responses of Arctic tundra vegetation to increasing nutrient availability, we examined how a set of leaf nutrient and ...
Case M. Prager +11 more
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Warming-induced nutrient enrichment in the Arctic may lead to shifts in leaf-level physiological properties and processes with potential consequences for plant community dynamics and ecosystem function. To explore the physiological responses of Arctic tundra vegetation to increasing nutrient availability, we examined how a set of leaf nutrient and ...
Case M. Prager +11 more
openaire +3 more sources
Shifts in litterfall and dominant nitrogen sources after expansion of shrub thickets
Oecologia, 2007Woody encroachment into herbaceous ecosystems is emerging as an important ecological response to global change. A primary concern is alterations in C and N cycling and associated variations across a variety of ecosystems. We quantified seasonal variation in litterfall and litter N concentration in Morella cerifera shrub thickets to assess changes in ...
Steven T, Brantley, Donald R, Young
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Tall shrub and tree expansion in Siberian tundra ecotones since the 1960s
Global Change Biology, 2014Abstract Circumpolar expansion of tall shrubs and trees into Arctic tundra is widely thought to be occurring as a result of recent climate warming, but little quantitative evidence exists for northern Siberia, which encompasses the world's largest forest‐tundra ecotonal belt.
Gerald V, Frost, Howard E, Epstein
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A recent downward expansion of shoreline shrubs at Lake Bienville (subarctic Quebec)
Geomorphology, 1995Abstract The regeneration patterns of Alnus crispa (Air.) Pursh. in response to water level lowerings were studied along the shores of Lake Bienville (898 km 2 ) in subarctic Quebec. During a period of high waters in the 1970s, pruning by drifting ice was important and contributed to sprouting and crown densification of well-established shrub ...
Yves Bégin, Louise Filion
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Consequences of shrub expansion in mesic grassland: Resource alterations and graminoid responses
Journal of Vegetation Science, 2003Abstract.In the mesic grasslands of the central United States, the shrubCornus drummondiihas undergone widespread expansion in the absence of recurrent fire. We quantified alterations in light, water and N caused byC. drummondiiexpansion in tall‐grass prairie and assessed the hypothesis that these alterations are consistent with models of resource ...
Michelle S. Lett, Alan K. Knapp
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LATE PLEISTOCENE SHRUB EXPANSION PRECEDED MEGAFAUNA EXTINCTIONS IN EASTERN BERINGIA
Geological Society of America Abstracts with Programs, 2020Alistair Monteath +3 more
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