Seasonal variation in catabolic enzyme activities in breast muscle of some migratory birds

Oecologia ◽  
1985 ◽  
Vol 66 (4) ◽  
pp. 468-471 ◽  
Author(s):  
Bj�rn O. Lundgren ◽  
Karl-Heinz Kiessling
Keyword(s):  
Seasonal Variation ◽  
Enzyme Activities ◽  
Migratory Birds ◽  
Breast Muscle ◽  
Catabolic Enzyme

Seasonal Variation in the Regulation of Redox State and Some Biotransformation Enzyme Activities in the Barn Swallow (Hirundo rusticaL.)

2012 ◽  
Vol 85 (2) ◽  
pp. 148-158 ◽  
Author(s):  
Sari Raja-aho ◽  
Mirella Kanerva ◽  
Tapio Eeva ◽  
Esa Lehikoinen ◽  
Petri Suorsa ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Enzyme Activities ◽  
Redox State ◽  
Barn Swallow ◽  
Biotransformation Enzyme

The response of soil enzyme activity to seasonal and microtopographical variations in the sedge peatlands in Changbai Mountain, China

2020 ◽  
Author(s):  
Ming Wang
Keyword(s):  
Enzyme Activity ◽  
Seasonal Variation ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Changbai Mountain ◽  
Soil Enzyme Activity ◽  
Small Scale ◽  
P Availability ◽  
Soil Enzyme Activities ◽  
Significant Difference

<p>Hummock-hollow microtopography is a common feature in northern peatlands. It<br>creates microsites of variable hydrology, vegetation, and soil biogeochemistry, thus affect soil C<br>cycling in peatlands at the local scale. This study investigated effects of microtopography on soil<br>enzyme (β-1,4-glucosidase (βG), β-1,4-N-acetylglucosaminidase (NAG), acid phosphatase (AP)<br>and peroxidase (PER)) activities and environment variables as well as their relationships in a<br>typical sedge peatland in Changbai Mountain, northeast of China. Our results showed that the<br>enzyme activities in the sedge peatland significantly varied across seasons and microtopographical<br>positions. Soil enzyme activities in hummocks exhibited more obvious seasonal variation than<br>hollows, with the βG, AP and PER activities presented a distinct valley in summer and the<br>maximum values occurred in Spring or Autumn. Soil hydrolase (βG, NAG and AP) activities in<br>hummocks were significantly higher compared to hollows, while soil oxidase (PER enzyme)<br>activity in hollows was higher than hummocks. The NMDS analysis revealed that the influence<br>degree of microtopography on the enzyme activities was higher than that of seasonal variation.<br>Redundancy analysis (RDA) indicated that the variations of soil enzyme activities in the peatland<br>were related to environmental variables, especially to water table depth (WTD), soil temperature<br>(ST), SOC, N availability and P availability. Furthermore, correlation analysis showed that the<br>three hydrolase (BG, NAG and AP) activities were positively correlated with soil TN, SOC and<br>C/N, and negatively correlated with WTD and TP. On the contrast, the PER activities were<br>positively correlated with TP, and negatively correlated with ST, SOC and C/N. The present<br>study demonstrated that small scale topographic heterogeneity created by hummock cause habitat<br>heterogeneity and thus lead to significant difference of soil enzyme activity between hummock<br>and hollow in the sedge peatlands. This finding provides further evidence of the importance of<br>peatland microtopography to C cycling and has direct implications for scaling biogeochemical<br>processes to the ecosystem level.</p>

Sign in / Sign up

Export Citation Format

Share Document