scholarly journals Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 3: Estimation of Fog Deposition onto Cool-temperate Deciduous Forest by the Inferential Method

2013 ◽  
Vol 7 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Genki Katata ◽  
Takashi Yamaguchi ◽  
Haruna Sato ◽  
Yoko Watanabe ◽  
Izumi Noguchi ◽  
...  
Ecology ◽  
2012 ◽  
Author(s):  
Frank S. Gilliam

Given the global distribution of human populations and their coincidence with temperate deciduous forests, it is likely that when most people consider the term “forest,” what comes to mind most frequently is the temperate deciduous forest biome. Although not to the level of their tropical counterparts, temperate deciduous forests typically display high plant biodiversity and rates of net primary productivity. They contrast sharply, however, with tropical forests in the distribution of biodiversity and productivity. In tropical forests, greatest plant diversity is associated with the vegetation of greatest productivity—trees. By contrast, the greatest plant diversity—up to 90 percent—in temperate deciduous forests occurs among the plants of least physical stature: the herbaceous species. Given the close association between these forests and their use by human populations, whether for food, fiber, habitat, or recreation, it is not surprising that they have been well studied, particularly in North America, and thus have a rich literature going back many years. However, for the very reason of that intensive use, temperate deciduous forests have proved to be an ecological moving target, as timber harvesting, air pollution, and introduced pests (e.g., insects and parasites) have represented a chronic assault on the structure and function of these ecosystems.


PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e6027
Author(s):  
Julia J. Mlynarek ◽  
Amélie Grégoire Taillefer ◽  
Terry A. Wheeler

Saproxylic insects, those associated directly or indirectly with decaying wood for all or part of their life cycle, compose a large proportion of forest organisms. Flies (Diptera) are often the most abundant and species-rich group of insects in forest microhabitats, yet most work to date on saproxylic insect diversity and ecology has focused on beetles (Coleoptera). We compared saproxylic Diptera assemblages reared from two tree species (sugar maple and American beech) at two stages of decay (early/young and advanced/old) for a total of 20 logs in an eastern Canadian Nearctic old-growth forest. We found that communities are distinct within both species type and decay stage of wood. Early decay stage wood is more variable in community composition than later decay stage; however, as the age of the decaying wood increases, the abundance of Diptera increases significantly. Most indicator species are discernible in later decay stage and wood type. We venture to suggest that stochastic and deterministic processes may play a role in driving Diptera communities in temperate deciduous forests. To retain the highest saproxylic Diptera diversity in a forest, a variety of decaying wood types at different stages of decomposition is necessary.


2018 ◽  
Vol 48 (7) ◽  
pp. 774-782 ◽  
Author(s):  
Jean-François Senécal ◽  
Frédérik Doyon ◽  
Benoît St-Onge

The use of LiDAR in the study of gap regimes has seen significant progress in recent years. Researchers have assumed that canopy gaps detected in this manner are ecologically equivalent to gaps sampled in situ by more traditional methods. However, those latter methods usually include canopy gaps only and ignore non-regenerating openings that are produced by causes limiting tree establishment. We developed a predictive model capable of discriminating between canopy gaps and non-regenerating openings using LiDAR-derived data. Selected predictive variables were related to conditions that limit tree establishment such as zones of moisture accumulation and steep slopes or to the resulting vegetation physiognomy. The model was applied to three old-growth maple forests to predict the fractions of canopy openings belonging to these two types. On average, non-regenerating openings represented 19.5% of the total area detected as canopy openings and occupied 1.37% of the sites. Canopy gaps formed 80.5% of the total area in canopy openings and covered 5.71% of sites that were studied. The non-regenerating opening seemed more frequent on thin surficial deposits. The canopy gap fraction was similar among study sites but had lower values than usually reported for temperate deciduous forest.


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