Evaluating the applicability of predicting dead fine fuel moisture based on the hourly Fine Fuel Moisture Code in the south-eastern Xing’an Mountains of China

2017 ◽  
Vol 26 (2) ◽  
pp. 167 ◽  
Author(s):  
Jili Zhang ◽  
Xiaoyang Cui ◽  
Rui Wei ◽  
Yan Huang ◽  
Xueying Di
Keyword(s):  
Scots Pine ◽  
Forest Floor ◽  
Loss Rate ◽  
Weather Data ◽  
Fuel Moisture ◽  
The South ◽  
Fire Control ◽  
South Eastern ◽  
Great Xing’An Mountains ◽  
Observation Period

To evaluate the applicability of the hourly Fine Fuel Moisture Code (FFMC) to the south-eastern Great Xing’an Mountains, dead fine fuel moisture (Mf) was observed under less-sheltered and sheltered conditions in Scots pine (Pinus sylvestris var. mongolica), larch (Larix gmelinii) and oak (Quercus mongolicus) stands during the summer and autumn of 2014. Standard FFMC and locally calibrated FFMC values calculated hourly were tested using Mf observations and weather data, and the results showed that the Mf loss rate in the less-sheltered forest floor was markedly higher than that in the sheltered forest floor (P < 0.05). The standard hourly FFMC underestimated Mf, especially in stands of larch, the dominant species in the Great Xing’an Mountains, and Mf for rainy days in Scots pine and oak stands. However, the calibrated hourly FFMC predicted Mf in all three forest stands very well (R2 ranged from 0.920 to 0.969; mean absolute errorfrom 2.93 to 6.93, and root-mean-squared errorfrom 4.09 to 7.87), which suggested that it was sufficiently robust for those stands around the observation period. This study will improve the accuracy of Mf predictions to aid fire control efforts in the Great Xing’an Mountains and provide a basis for hourly FFMC model calibration.

scholarly journals Weather–Growth Responses Show Differing Adaptability of Scots Pine Provenances in the South-Eastern Parts of Baltic Sea Region

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1641
Author(s):  
Roberts Matisons ◽  
Diāna Jansone ◽  
Endijs Bāders ◽  
Stefānija Dubra ◽  
Pauls Zeltiņš ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Scots Pine ◽  
Field Performance ◽  
Weather Conditions ◽  
Additive Models ◽  
Climatic Gradient ◽  
Growth Responses ◽  
The South ◽  
South Eastern ◽  
Baltic Sea Region

Local adaptation and plasticity of growth play important roles in the adaptability of trees to changing conditions. Under accelerating climatic changes, the adaptive capacity of metapopulations can be exceeded, implying a necessity for assisted gene flow to sustain the productivity of forests. Such management is knowledge intensive, and information on the responsiveness of metapopulations (provenances) across the climatic gradient can aid more comprehensive projections of their performance. The plasticity of growth responses to weather conditions of five provenances of Scots pine with differing field performance across the climatic gradient of the south-eastern Baltic Sea region was assessed using dendrochronological methods and generalized additive models. Weather conditions related to water availability in summer, as well as during dormancy, were the main regional drivers of an increment in the provenances. The provenances differed by the plasticity of responses according to field performance, indicating adaptation in terms of growth sensitivity and uneven adaptability. The weather–growth responses of the top-performing provenances to summer weather were more plastic, providing advantages under a changing climate. Accordingly, regional sensitivity and plasticity of growth responses could be used for the screening of genotypes best suited for the projected climates. In addition, the estimated growth responses encourage supplementation of the local breeding populations with the top-performing provenances originating from sites with the projected climates.

scholarly journals Licea parasitica (Myxomycetes) new to Belarus

2017 ◽  
Vol 23 (1) ◽  
pp. 75-76
Author(s):  
Andrei Tsurykau
Keyword(s):  
Scots Pine ◽  
Pine Plantations ◽  
Tree Bark ◽  
Epiphytic Lichens ◽  
The South ◽  
South Eastern

AbstractLicea parasitica (Zukal) G.W.Martin is reported new to Belarus. It was recorded in two localities, growing on both tree bark and epiphytic lichens in young Scots pine plantations in Gomel region, the south-eastern Belarus.

Lightning and fire weather in eastern coastal fynbos shrublands: seasonality and long-term trends

2013 ◽  
Vol 22 (3) ◽  
pp. 288 ◽  
Author(s):  
Tineke Kraaij ◽  
Richard M. Cowling ◽  
Brian W. van Wilgen
Keyword(s):  
Fire Regime ◽  
Temporal Trends ◽  
Fire Danger ◽  
Weather Data ◽  
Lightning Strike ◽  
The South ◽  
South Eastern ◽  
Daily Weather Data ◽  
Cloud To Ground Lightning ◽  
Season Of Burn

Daily weather data (since 1939) from four localities in the south-eastern, coastal part of the Cape Floral Kingdom (‘south-eastern-CFK’) were used to calculate daily fire danger indices (FDIs). Cloud-to-ground lightning strike distributions (2006–10) were explored for geographical and temporal trends. Low or moderate fire danger conditions were the norm year round, and even large fires occurred under these conditions. Lightning occurred throughout the landscape at fairly low densities (mean = 0.4 strikes km–2 year–1) and in all seasons, increasing somewhat during summer. Lightning presence increased with increasing rainfall, relative humidity, temperature and wind speed. Lightning seasonality in the south-eastern-CFK did not differ from that in the south-western-CFK. Our results provide evidence of a largely aseasonal fire regime in eastern coastal fynbos shrublands: FDIs peaked in winter (due to low rainfall and hot, dry katabatic winds) but were not associated with a winter fire regime; lightning and the co-occurrence of lightning and elevated FDIs were aseasonal and were correlated with the incidence of lightning-ignited fires throughout the year. The implication for management is that season of burn is largely unimportant. Mean annual FDI increased significantly over the study period, a trend which is likely to manifest in increased frequency and severity of fire, some of which has already been observed.

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