scholarly journals Tropical understory herbaceous community responds more strongly to hurricane disturbance than to experimental warming

2020 ◽  
Vol 10 (16) ◽  
pp. 8906-8915 ◽  
Author(s):  
Deborah K. Kennard ◽  
David Matlaga ◽  
Joanne Sharpe ◽  
Clay King ◽  
Aura M. Alonso‐Rodríguez ◽  
...  
Keyword(s):  
Experimental Warming ◽  
Hurricane Disturbance ◽  
Herbaceous Community

Submergence, nutrient enrichment, and tropical storm impacts on Spartina alterniflora in the microtidal northern Gulf of Mexico

2020 ◽  
Vol 644 ◽  
pp. 33-45
Author(s):  
JM Hill ◽  
PS Petraitis ◽  
KL Heck
Keyword(s):  
Gulf Of Mexico ◽  
Sea Level Rise ◽  
Sea Level ◽  
Spartina Alterniflora ◽  
Anthropogenic Impacts ◽  
Interactive Effects ◽  
Relative Sea Level ◽  
Hurricane Disturbance ◽  
Submergence Stress ◽  
Relative Sea Level Rise

Salt marshes face chronic anthropogenic impacts such as relative sea level rise and eutrophication, as well as acute disturbances from tropical storms that can affect the productivity of these important communities. However, it is not well understood how marshes already subjected to eutrophication and sea level rise will respond to added effects of episodic storms such as hurricanes. We examined the interactive effects of nutrient addition, sea level rise, and a hurricane on the growth, biomass accumulation, and resilience of the saltmarsh cordgrass Spartina alterniflora in the Gulf of Mexico. In a microtidal marsh, we manipulated nutrient levels and submergence using marsh organs in which cordgrasses were planted at differing intertidal elevations and measured the impacts of Hurricane Isaac, which occurred during the experiment. Prior to the hurricane, grasses at intermediate and high elevations increased in abundance. After the hurricane, all treatments lost approximately 50% of their shoots, demonstrating that added nutrients and elevation did not provide resistance to hurricane disturbance. At the end of the experiment, only the highest elevations had been resilient to the hurricane, with increased above- and belowground growth. Added nutrients provided a modest increase in above- and belowground growth, but only at the highest elevations, suggesting that only elevation will enhance resilience to hurricane disturbance. These results empirically demonstrate that S. alterniflora in microtidal locations already subjected to submergence stress is less able to recover from storm disturbance and suggests we may be underestimating the loss of northern Gulf Coast marshes due to relative sea level rise.

Microbial Communities of Alpine Meadow Soil in the Eastern Qinghai-Tibetan Plateau Subjected to Experimental Warming and Grazing*

2012 ◽  
Vol 17 (2) ◽  
pp. 151-157 ◽  
Author(s):  
Bei WANG ◽  
Geng SUN ◽  
Peng LUO ◽  
Zhiyuan WANG ◽  
Yanbo ZHANG ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Microbial Communities ◽  
Alpine Meadow ◽  
Meadow Soil ◽  
Experimental Warming

scholarly journals Responses of tundra plant community carbon flux to experimental warming, dominant species removal and elevation

2020 ◽  
Vol 34 (7) ◽  
pp. 1497-1506
Author(s):  
Maja K. Sundqvist ◽  
Nathan J. Sanders ◽  
Ellen Dorrepaal ◽  
Elin Lindén ◽  
Daniel B. Metcalfe ◽  
...  
Keyword(s):  
Plant Community ◽  
Carbon Flux ◽  
Dominant Species ◽  
Experimental Warming ◽  
Species Removal

scholarly journals EXPERIMENTAL WARMING, NOT GRAZING, DECREASES RANGELAND QUALITY ON THE TIBETAN PLATEAU

2007 ◽  
Vol 17 (2) ◽  
pp. 541-557 ◽  
Author(s):  
Julia A. Klein ◽  
John Harte ◽  
Xin-Quan Zhao
Keyword(s):  
Tibetan Plateau ◽  
The Tibetan Plateau ◽  
Experimental Warming

Short-term effects of hurricane disturbance on food availability for migrant songbirds during autumn stopover

Wetlands ◽  
2009 ◽  
Vol 29 (1) ◽  
pp. 123-134 ◽  
Author(s):  
Robert C. Dobbs ◽  
Wylie C. Barrow ◽  
Clinton W. Jeske ◽  
Jennifer DiMiceli ◽  
Thomas C. Michot ◽  
...  
Keyword(s):  
Food Availability ◽  
Short Term ◽  
Hurricane Disturbance ◽  
Short Term Effects

Sur l'organisation phytochimique de formations prairiales permanentes

2001 ◽  
Vol 79 (4) ◽  
pp. 510-519 ◽  
Author(s):  
Philippe Lebreton ◽  
Bernard Jeangros ◽  
Christiane Gallet ◽  
Jan Scehovic
Keyword(s):  
Cell Wall ◽  
Multivariate Analysis ◽  
Plant Communities ◽  
Nutrient Pool ◽  
Grassland Species ◽  
Anthriscus Sylvestris ◽  
Cool Environment ◽  
Mineral Components ◽  
Herbaceous Community ◽  
Food Value

Organic and mineral components have been analysed on 18 dicotyledonous species of permanent grassland communities. Multivariate analysis revealed an opposition between a macromolecular pool (cellulose and lignin) and a nutrient pool (potassium and phosphorus, nitrogen). The first pole is characterized by Tragopogon pratensis L. (Compositae) and Galium mollugo L. (Rubiaceae), the second by Anthriscus sylvestris (L.) Hoffm. (Umbelliferae) and Geranium sylvaticum L. (Geraniaceae). The most thermo-helio-xerophilous species (Knautia arvensis (L.) Coult and Tragopogon pratensis) belong to the first group, whereas the second group includes the cool-environment species (like Alchemilla xanthochlora Roth.), which reveals an ecophysiological determinism. Moreover, correlations between the biochemical and ecological structure, and other interrelated parameters, including sclerophylly, have been shown. Compared to lignous and sempervirent plant communities, the grassland species have lower phenolic and lignin contents but higher glucide and nutrient (potassium and phosphorus) contents, which is in accordance with their food value. For this herbaceous community, the C/N ratio indicates the same general equilibrium between cell-wall macromolecules and nitrogen than for two other plant communities (mainly ligneous) previously studied, with some differences revealing distinct trends from the same general metabolic sheme.Key words: dicotyledonous plant communities, biochemical organization, C/N ratio, ecophysiology.

scholarly journals Decomposition of recalcitrant carbon under experimental warming in boreal forest

PLoS ONE ◽  
2017 ◽  
Vol 12 (6) ◽  
pp. e0179674 ◽  
Author(s):  
Adriana L. Romero-Olivares ◽  
Steven D. Allison ◽  
Kathleen K. Treseder
Keyword(s):  
Boreal Forest ◽  
Experimental Warming ◽  
Recalcitrant Carbon
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