Climate change decreases aquatic ecosystem productivity of Lake Tanganyika, Africa

Nature ◽  
2003 ◽  
Vol 424 (6950) ◽  
pp. 766-768 ◽  
Author(s):  
Catherine M. O'Reilly ◽  
Simone R. Alin ◽  
Pierre-Denis Plisnier ◽  
Andrew S. Cohen ◽  
Brent A. McKee
Keyword(s):  
Climate Change ◽  
Aquatic Ecosystem ◽  
Lake Tanganyika ◽  
Ecosystem Productivity

Mismatch between the optimal ages for ecosystem productivity and net CO2 sequestration in Norway spruce forests

2021 ◽  
Author(s):  
Junbin Zhao ◽  
Holger Lange ◽  
Helge Meissner
Keyword(s):  
Climate Change ◽  
Primary Production ◽  
Norway Spruce ◽  
Ecosystem Respiration ◽  
Gross Primary Production ◽  
Economic Benefits ◽  
Sink Strength ◽  
Climate Change Scenarios ◽  
Ecosystem Productivity ◽  
Spruce Forests

<p>Forests have climate change mitigation potential since they sequester carbon. However, their carbon sink strength might depend on management. As a result of the balance between CO<sub>2</sub> uptake and emission, forest net ecosystem exchange (NEE) reaches optimal values (maximum sink strength) at young stand ages, followed by a gradual NEE decline over many years. Traditionally, this peak of NEE is believed to be concurrent with the peak of primary production (e.g., gross primary production, GPP); however, in theory, this concurrence may potentially vary depending on tree species, site conditions and the patterns of ecosystem respiration (R<sub>eco</sub>). In this study, we used eddy-covariance (EC)-based CO<sub>2</sub> flux measurements from 8 forest sites that are dominated by Norway spruce (Picea abies L.) and built machine learning models to find the optimal age of ecosystem productivity and that of CO<sub>2</sub> sequestration. We found that the net CO<sub>2</sub> uptake of Norway spruce forests peaked at ages of 30-40 yrs. Surprisingly, this NEE peak did not overlap with the peak of GPP, which appeared later at ages of 60-90 yrs. The mismatch between NEE and GPP was a result of the R<sub>eco</sub> increase that lagged behind the GPP increase associated with the tree growth at early age. Moreover, we also found that newly planted Norway spruce stands had a high probability (up to 90%) of being a C source in the first year, while, at an age as young as 5 yrs, they were likely to be a sink already. Further, using common climate change scenarios, our model results suggest that net CO<sub>2</sub> uptake of Norway spruce forests will increase under the future climate with young stands in the high latitude areas being more beneficial. Overall, the results suggest that forest management practices should consider NEE and forest productivity separately and harvests should be performed only after the optimal ages of both the CO<sub>2</sub> sequestration and productivity to gain full ecological and economic benefits.</p>

scholarly journals Effect of salinity on the zinc(II) binding efficiency of siderophore functional groups and implications for salinity tolerance mechanisms in barley

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
George H. R. Northover ◽  
Yiru Mao ◽  
Haris Ahmed ◽  
Salvador Blasco ◽  
Ramon Vilar ◽  
...  
Keyword(s):  
Climate Change ◽  
Functional Groups ◽  
Salinity Tolerance ◽  
Metal Binding ◽  
Micronutrient Deficiencies ◽  
Ecosystem Productivity ◽  
Tolerance Mechanisms ◽  
Whole Plant ◽  
Chelating Ability ◽  
The Impact

AbstractBacteria, fungi and grasses use siderophores to access micronutrients. Hence, the metal binding efficiency of siderophores is directly related to ecosystem productivity. Salinization of natural solutions, linked to climate change induced sea level rise and changing precipitation patterns, is a serious ecological threat. In this study, we investigate the impact of salinization on the zinc(II) binding efficiency of the major siderophore functional groups, namely the catecholate (for bacterial siderophores), α-hydroxycarboxylate (for plant siderophores; phytosiderophores) and hydroxamate (for fungal siderophores) bidentate motifs. Our analysis suggests that the order of increasing susceptibility of siderophore classes to salinity in terms of their zinc(II) chelating ability is: hydroxamate < catecholate < α-hydroxycarboxylate. Based on this ordering, we predict that plant productivity is more sensitive to salinization than either bacterial or fungal productivity. Finally, we show that previously observed increases in phytosiderophore release by barley plants grown under salt stress in a medium without initial micronutrient deficiencies, are in line with the reduced zinc(II) binding efficiency of the α-hydroxycarboxylate ligand and hence important for the salinity tolerance of whole-plant zinc(II) status.

CLIMATE CHANGE UNCOUPLES TROPHIC INTERACTIONS IN AN AQUATIC ECOSYSTEM

Ecology ◽  
2004 ◽  
Vol 85 (8) ◽  
pp. 2100-2106 ◽  
Author(s):  
Monika Winder ◽  
Daniel E. Schindler
Keyword(s):  
Climate Change ◽  
Trophic Interactions ◽  
Aquatic Ecosystem

Climate-change effect on Lake Tanganyika? (reply)

Nature ◽  
2004 ◽  
Vol 430 (6997) ◽  
pp. 1-2 ◽  
Author(s):  
C. M. O'Reilly ◽  
P. -D. Plisnier ◽  
A. S. Cohen ◽  
S. R. Alin
Keyword(s):  
Climate Change ◽  
Lake Tanganyika ◽  
Change Effect ◽  
Climate Change Effect

Terrestrial and aquatic ecosystem responses to early Holocene rapid climate change (RCC) events in the South Carpathian Mountains, Romania

2018 ◽  
Vol 477 ◽  
pp. 79-93 ◽  
Author(s):  
Ilona Pál ◽  
Krisztina Buczkó ◽  
Ildikó Vincze ◽  
Walter Finsinger ◽  
Mihály Braun ◽  
...  
Keyword(s):  
Climate Change ◽  
Aquatic Ecosystem ◽  
Early Holocene ◽  
The South ◽  
Carpathian Mountains ◽  
Ecosystem Responses ◽  
Rapid Climate Change

IMPACTS OF CLIMATE CHANGE ON AQUATIC ECOSYSTEM FUNCTIONING AND HEALTH

1999 ◽  
Vol 35 (6) ◽  
pp. 1373-1386 ◽  
Author(s):  
Judy L. Meyer ◽  
Michael J. Sale ◽  
Patrick J. Mulholland ◽  
N. LeRoy Poff
Keyword(s):  
Climate Change ◽  
Aquatic Ecosystem ◽  
Ecosystem Functioning ◽  
Impacts Of Climate Change
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