scholarly journals Biotic and abiotic controls on tree colonization in three early successional communities of Chiloé Island, Chile

2010 ◽  
Vol 99 (1) ◽  
pp. 288-299 ◽  
Author(s):  
Marcela A. Bustamante-Sánchez ◽  
Juan J. Armesto ◽  
Charles B. Halpern
Keyword(s):  
Abiotic Controls ◽  
Successional Communities

scholarly journals Vegetation and microbes interact to preserve carbon in many wooded peatlands

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Hongjun Wang ◽  
Jianqing Tian ◽  
Huai Chen ◽  
Mengchi Ho ◽  
Rytas Vilgalys ◽  
...  
Keyword(s):  
Microbial Composition ◽  
Ecological Traits ◽  
Low Latitude ◽  
Carbon Decomposition ◽  
Positive Effects ◽  
Recalcitrant Carbon ◽  
Effects Of Temperature ◽  
Abiotic Controls ◽  
Slow Growing

AbstractPeatlands have persisted as massive carbon sinks over millennia, even during past periods of climate change. The commonly accepted theory of abiotic controls (mainly anoxia and low temperature) over carbon decomposition cannot fully explain how vast low-latitude shrub/tree dominated (wooded) peatlands consistently accrete peat under warm and seasonally unsaturated conditions. Here we show, by comparing the composition and ecological traits of microbes between Sphagnum- and shrub-dominated peatlands, that slow-growing microbes decisively dominate the studied shrub-dominated peatlands, concomitant with plant-induced increases in highly recalcitrant carbon and phenolics. The slow-growing microbes metabolize organic matter thirty times slower than the fast-growing microbes that dominate our Sphagnum-dominated site. We suggest that the high-phenolic shrub/tree induced shifts in microbial composition may compensate for positive effects of temperature and/or drought on metabolism over time in peatlands. This biotic self-sustaining process that modulates abiotic controls on carbon cycling may improve projections of long-term, climate-carbon feedbacks in peatlands.

scholarly journals Biotic and abiotic controls on co-occurring nitrogen cycling processes in shallow Arctic shelf sediments

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
N. D. McTigue ◽  
W. S. Gardner ◽  
K. H. Dunton ◽  
A. K. Hardison
Keyword(s):  
Nitrogen Cycling ◽  
Arctic Shelf ◽  
Shelf Sediments ◽  
Abiotic Controls

Biotic and Abiotic Controls on the Phanerozoic History of Marine Animal Biodiversity

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Andrew M. Bush ◽  
Jonathan L. Payne
Keyword(s):  
Biotic Interactions ◽  
Annual Review ◽  
Publication Date ◽  
Data Sets ◽  
Marine Animal ◽  
Marine Animals ◽  
Marine Habitat ◽  
Positive Feedbacks ◽  
Abiotic Controls ◽  
Time Changes

During the past 541 million years, marine animals underwent three intervals of diversification (early Cambrian, Ordovician, Cretaceous–Cenozoic) separated by nondirectional fluctuation, suggesting diversity-dependent dynamics with the equilibrium diversity shifting through time. Changes in factors such as shallow-marine habitat area and climate appear to have modulated the nondirectional fluctuations. Directional increases in diversity are best explained by evolutionary innovations in marine animals and primary producers coupled with stepwise increases in the availability of food and oxygen. Increasing intensity of biotic interactions such as predation and disturbance may have led to positive feedbacks on diversification as ecosystems became more complex. Important areas for further research include improving the geographic coverage and temporal resolution of paleontological data sets, as well as deepening our understanding of Earth system evolution and the physiological and ecological traits that modulated organismal responses to environmental change. Expected final online publication date for the Annual Review of Ecology, Evolution, and Systematics, Volume 52 is November 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Utilisation of Inorganic Substrates by Alicyclobacillus - Like Strain FP1

2015 ◽  
Vol 1130 ◽  
pp. 308-311 ◽  
Author(s):  
Helen R. Watling ◽  
David M. Collinson ◽  
Felicity A. Perrot ◽  
Denis W. Shiers
Keyword(s):  
Growth Factor ◽  
Yeast Extract ◽  
Elemental Sulfur ◽  
Sulfur Compound ◽  
Growth Media ◽  
Inorganic Sulfur ◽  
Inorganic Substrates ◽  
Water Ph ◽  
Abiotic Controls ◽  
Inorganic Sulfur Compound

As Alicyclobacillus-like strain FP1 was isolated from copper heap process water (pH 1.5), this research was directed towards its bioleaching attributes, specifically ferrous ion (Fe (II)) and reduced inorganic sulfur compound (RISC) oxidation, and bioleaching of sulfide minerals. Strain FP1 oxidised iron (II) but not tetrathionate or elemental sulfur in growth media containing yeast extract as growth factor. The addition of tetrathionate (2.5 mM) suppressed iron (II) oxidation. Strain FP1 grew on pyrite, arsenopyrite, chalcopyrite, sphalerite and pentlandite in BSM-YE medium at 30 °C and pH 1.8 (35 days), enhancing Zn, Co (in cobaltiferous pyrite), Fe and As recovery, but not Cu or Ni, relative to abiotic controls.

Biotic and Abiotic Controls Over Canopy Function and Structure in Humid Hawaiian Forests

Ecosystems ◽  
2017 ◽  
Vol 21 (2) ◽  
pp. 331-348 ◽  
Author(s):  
Christopher S. Balzotti ◽  
Gregory P. Asner
Keyword(s):  
Abiotic Controls
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