Results 51 to 60 of about 1,188,588 (171)

Scale‐dependent responses of understory vegetation to the physical structure of undisturbed tundra shrub patches

open access: yesEcosphere, 2022
Much of the Arctic is experiencing rapid change in the productivity and recruitment of tall, deciduous shrubs. It is well established that shrub expansion can alter tundra ecosystem composition and function; however, less is known about the degree to ...
Cory A. Wallace, Jennifer L. Baltzer
doaj   +1 more source

Shrub facilitation increases plant diversity along an arid scrubland-temperate rainforest boundary in South America [PDF]

open access: yes, 2012
Theoretical models predict nurse plant facilitation enhances species richness by ameliorating stressful environmental conditions and expanding distributional ranges of stress-intolerant species into harsh environments.
Zonneveld, M.J., van   +3 more
core   +1 more source

Comparative use of alder, birch, and upright willow shrubs by passerines in above–tree line regions of Arctic and sub-Arctic Alaska

open access: yesArctic, Antarctic, and Alpine Research
Assessments of passerine–habitat relationships in shrub tundra regions are rare, limiting our understanding of the effects of shrub expansion. Further, previous studies of shrub tundra passerines have primarily assessed variation in abundance as a ...
Jeremy D. Mizel
doaj   +1 more source

Corticular photosynthesis: A mechanism to enhance shrub expansion in coastal environments

open access: yesPhotosynthetica, 2009
Myrica cerifera L. (Myricaceae), the dominant woody species on many barrier islands along the southeastern coast of the United States, is expanding into grass-dominated, mesic, interdunal depressions where it forms dense thickets. Expansion may be attributed to a symbiotic nitrogen fixation with the bacterium Frankia, an evergreen leaf habit and ...
J.K. Vick, D. R. Young
openaire   +1 more source

Shrub expansion in the Arctic may induce large-scale carbon losses due to changes in plant-soil interactions [PDF]

open access: yes, 2021
Background Tall deciduous shrubs are increasing in range, size and cover across much of the Arctic, a process commonly assumed to increase carbon (C) storage.
Thurston, Alana M   +5 more
core   +1 more source

Modelled sensitivity of the snow regime to topography, shrub fraction and shrub height [PDF]

open access: yesHydrology and Earth System Sciences, 2014
Recent studies show that shrubs are colonizing higher latitudes and altitudes in the Arctic. Shrubs affect the wind transport, accumulation and melt of snow, but there have been few sensitivity studies of how shrub expansion might affect snowmelt rates ...
C. B. Ménard, R. Essery, J. Pomeroy
doaj   +1 more source

Control of Mosses on Water Flux in an Alpine Shrub Site on the Qilian Mountains, Northwest China

open access: yesPlants, 2022
Mosses are an important component of the alpine shrub, but little is known about their contribution to ecosystem water and energy exchange, especially potential opportunities for alpine shrub expansion under a warming climate.
Zhangwen Liu   +5 more
doaj   +1 more source

Data used in Shrub expansion modulates belowground impacts of changing snow conditions in alpine grasslands study

open access: yes, 2021
We established two complementary field experiments. The first experiment used a natural gradient in snowmelt timing combined with a shrub manipulation treatment across three alpine valleys in the Austrian Alps to test how earlier snowmelt and shrub ...
Arthur Broadbent (11538412)
core   +1 more source

Microbial C and N Metabolism Alterations Based on Soil Metagenome and Different Shrub Invasion Stages in Sanjiang Plain Wetlands

open access: yesMicroorganisms
Shrub invasion affects plant growth and soil physicochemical properties, resulting in soil microbiota metabolic pathway changes. However, little is known about the shrub expansion intensity of microbial metabolic pathway processes. In this study, we used
Rongtao Zhang   +6 more
doaj   +1 more source

Document expansion for image retrieval [PDF]

open access: yes, 2010
Successful information retrieval requires effective matching between the user's search request and the contents of relevant documents. Often the request entered by a user may not use the same topic relevant terms as the authors' of the documents.
Min, Jinming   +3 more
core   +2 more sources

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