Responses of terrestrial bryophytes to simulated climate change in a secondary evergreen broad-leaved forest in southern China

2022 ◽  
Author(s):  
Jiewei Hao ◽  
L. M. Chu
Keyword(s):  
Climate Change ◽  
Southern China ◽  
Broad Leaved Forest ◽  
Simulated Climate ◽  
Leaved Forest ◽  
Simulated Climate Change

Responses of Terrestrial Mosses to Simulated Climate Change in a Secondary Evergreen Broad-leaved Forest in Southern China

2021 ◽  
Author(s):  
Jiewei Hao ◽  
L.M. Chu
Keyword(s):  
Climate Change ◽  
Tropical Forest ◽  
Forest Ecosystems ◽  
Southern China ◽  
Global Climate ◽  
Moss Species ◽  
Tropical Regions ◽  
Simulated Climate ◽  
Terrestrial Mosses ◽  
Simulated Climate Change

Abstract Tropical regions are biodiversity hotspots and are well suited to explore the potential influence of global climate change on forest ecosystems. Bryophytes have essential ecological functions in tropical forest ecosystems. Knowledge of the potential impact of global warming and possible changes in water availability patterns on terrestrial bryophytes is limited. We transplanted eight moss species from two elevations (900 and 500 m) to warmer and drier elevations (500 and 100 m) during a half-year observation period on Tai Mo Shan, southern China. The simulated climate change resulted in a marked decrease in growth and a negative effect on the health of the transplanted species. Few moss species survived six months after transplanting to the warmer and drier lowlands, and their health status deteriorated severely. Three moss species, Sematophyllum subhumile, Pseudotaxiphyllum pohliaecarpum, and Brachythecium buchananii, were highly susceptible to changes in temperature and moisture and might be used as suitable bioindicators. As the tropics are expected to become hotter and drier, terrestrial mosses might be negatively affected or even be at risk of extinction. The cascading negative effects on the forest ecosystem might be induced by the dying back or even disappearance of terrestrial moss species. Thus, conservation of bryophyte communities is important to sustain and improve the stability and resilience of tropical forest ecosystems to climate change.

A climate change-induced threat to the ecological resilience of a subtropical monsoon evergreen broad-leaved forest in Southern China

2013 ◽  
Vol 19 (4) ◽  
pp. 1197-1210 ◽  
Author(s):  
Guoyi Zhou ◽  
Changhui Peng ◽  
Yuelin Li ◽  
Shizhong Liu ◽  
Qianmei Zhang ◽  
...  
Keyword(s):  
Climate Change ◽  
Southern China ◽  
Ecological Resilience ◽  
Broad Leaved Forest ◽  
Leaved Forest

scholarly journals Diminished soil functions occur under simulated climate change in a sup-alpine pasture, but heterotrophic temperature sensitivity indicates microbial resilience

2014 ◽  
Vol 473-474 ◽  
pp. 465-472 ◽  
Author(s):  
Robert T.E. Mills ◽  
Konstantin S. Gavazov ◽  
Thomas Spiegelberger ◽  
David Johnson ◽  
Alexandre Buttler
Keyword(s):  
Climate Change ◽  
Temperature Sensitivity ◽  
Soil Functions ◽  
Alpine Pasture ◽  
Simulated Climate ◽  
Simulated Climate Change

Quantifying the sensitivity of simulated climate change to model configuration

2008 ◽  
Vol 92 (3-4) ◽  
pp. 275-298 ◽  
Author(s):  
Barry H. Lynn ◽  
Richard Healy ◽  
Leonard M. Druyan
Keyword(s):  
Climate Change ◽  
Model Configuration ◽  
Simulated Climate ◽  
Simulated Climate Change

How does simulated climate change affect the susceptibility of SOM to priming by LMWOS in the Subarctic?

2021 ◽  
Author(s):  
Meng Na ◽  
Mingyue Yuan ◽  
Lettice Hicks ◽  
Johannes Rousk
Keyword(s):  
Climate Change ◽  
Plant Communities ◽  
N Mineralization ◽  
Fungal Growth ◽  
N Fertilization ◽  
C Mineralization ◽  
Soil C ◽  
Gross N Mineralization ◽  
Simulated Climate ◽  
Simulated Climate Change

<p>Soil organic matter (SOM) stabilization plays an important role in the long-term storage of carbon (C). However, many ecosystems are undergoing climate change, which will change the soil C balance via altered plant communities and productivity that change C inputs, and altered C losses via changes in SOM decomposition. The ongoing change of aboveground plant communities in the Subarctic (“greening”) will increase rhizosphere inputs containing low molecular weight organic substances (LMWOS), which will likely affect C-starved microbial decomposers and their subsequent contribution to SOM mineralization (priming effect).In the present study, we simulated the effects of climate change with N fertilization (simulating warming enhanced nutrient cycling) and litter additions (simulating arctic greening) in Abisko, Sweden. The 6 sampled field-treatments included a full factorial combination of 3-years of chronic N addition and litter additions, as well as, a single year of extreme climate change (3x N fertilizer or litter additions in one growth season). We found that N treatments changed plant community composition and productivityand that the associated shift in belowground LMWOS induced shifts in the soil microbial community. In the chronic N fertilization treatments, plant productivity, and therefore belowground LMWOS input, increased. This coincided with a tendency for more bacterial dominated decomposition (lower fungi/bacterial growth ratio). However, N treatments had no effect on soil C mineralization, but increased gross N mineralization.</p><p>These responses in belowground communities and processes driven by rhizosphere input prompted the next question: how does simulated climate change affect the susceptibility of SOM to priming by LMWOS? To assess this question and determine the microbial mechanisms underpinning priming of SOM mineralization, we added a factorial set of additions including <sup>13</sup>C-glucose with and without mineral N, and <sup>13</sup>C-alanine semi-continuously (every 48 hours) to simulate the effect of rhizosphere LMWOS on SOM mineralization and microbial activity. We incubated these samples for 2 weeks and assessed the priming of soil C and gross N mineralization, bacterial and fungal growth rates, PLFAs, enzyme activities, and microbial C use efficiency (CUE). We found that alanine addition primed soil C mineralization by 34%, which was higher than soil C priming induced by glucose and glucose with N. Furthermore, glucose primed fungal growth, whereas the alanine primed bacterial growth, but microbial PLFAs did not respond to either treatment. The C enzyme acquisition activity was higher than N enzyme acquisition activity in all the treatments, while P enzyme acquisition activity was higher than C for all the treatments. Surprisingly, this suggested a chronic microbial limitation by P, which was unaffected by field and lab treatments. LMWOS additions generally reduced microbial CUE. Responses of microbial mineralization of N from SOM to LMWOS suggested a directed microbial effort towards targeting resources that limited bacterial or fungal growth, suggesting that microbial SOM-use shifted to N-rich components (selective microbial “N-mining”), in contrast with enzyme results. Surprisingly, alanine primed the highest N mineralization compared other additions indicating that there was strong N-mining even if N was sufficient.</p>

Responses of Epiphytic Bryophyte Communities to Simulated Climate Change in the Tropics

2012 ◽  
pp. 191-208 ◽  
Author(s):  
Jorge Jácome ◽  
S. Robbert Gradstein ◽  
Michael Kessler ◽  
Zoltan Tuba ◽  
Nancy G. Slack ◽  
...  
Keyword(s):  
Climate Change ◽  
Simulated Climate ◽  
The Tropics ◽  
Simulated Climate Change
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