There are many studies relative to thinning of forests, studies on water yield changes, wildlife habitat improvement, growth and yield projections, efficient ways to thin while minimizing ground effects, etc.  And while many of these studies may have some general relation, it is probably best to conduct a literature review on the species of interest, your local area or similar areas of climate, rainfall, soils, etc.  Natural thinning rates for many species tend to be very slow unless you have disturbance regimes such as fire that contribute to thinning.  Artificial thinning may have many goals, improve forest health, provide wood for burning, improve log quality for sawtimber, maximize biomass growth, provide habitats for rare or endangered or desired species, provide hunting reserves, healthy wildlife reserves, meet landowner desires, etc. I would search your local area and conditions as a start, and then expand outward if you need to, looking for areas which may have similarities to your conditions, or specific papers that have accumulated a lot of information associated with thinning.  I do have one document that provides some soil and water conservation guidance for the SE USA that has some brief comments on thinning and timber harvest in general.  Thinning is a silvicultural practice, so if you don't find enough on forest thinning, you might look under that subject.

Dear,

Please find the paper below.

Article Evaluating the Carbon Stock in Above-and Below-Ground Biomas...

Hello, here the link to some studies

Regards

https://www.researchgate.net/publication/283819868_The_effect_of_strip_thinning_on_forest_floor_evaporation_in_a_Japanese_cypress_plantation

https://www.researchgate.net/publication/290788868_Effect_of_thinning-induced_gap_size_on_soil_CO2_efflux_in_a_reforested_spruce_forest_in_the_eastern_Tibetan_Plateau?ev=srch_pub&_sg=FLHq4f3PiJKOKP5nmjgdeVFwMj3ikvsmlBJpZ-NkFZJLDDy6BBFtng6Zt9IU5gz0.B45ijJuKTC9SB0DYEbLjI5YIS5AzXLXRuXfWuGKEgL1ab_5JqGYyUgOQ8tIwSVhB.VksKMjdYRlRZdsrF5qLGf4jXA-tT1cdV0j-o9nSqjjjl5SQ1yYcHlOEWsd5qjtP3

https://www.researchgate.net/publication/295243730_Responses_of_Soil_Fungal_Populations_and_Communities_to_the_Thinning_of_Cryptomeria_Japonica_Forests

https://www.researchgate.net/publication/260769338_Structure_Richness_and_Composition_of_Arboreal_Plants_in_a_Cloud_Thinning_Forest_of_Tolima_Colombia

http://onlinelibrary.wiley.com/doi/10.1111/1749-4877.12184/abstract

https://www.researchgate.net/publication/277962331_Short-_and_long-term_efficacy_of_forest_thinning_to_mitigate_drought_impacts_in_mountain_forests_in_the_European_Alps

https://www.researchgate.net/publication/274097067_Long_term_thinning_and_logging_in_Australian_cypress_pine_forest_Changes_in_habitat_attributes_and_response_of_fauna

http://meetingorganizer.copernicus.org/EGU2015/EGU2015-6742-1.pdf

http://eprints.cdlib.org/uc/item/0860v7f8

https://www.researchgate.net/publication/290788868_Effect_of_thinning-induced_gap_size_on_soil_CO2_efflux_in_a_reforested_spruce_forest_in_the_eastern_Tibetan_Plateau

Article The effect of strip thinning on forest floor evaporation in ...

Article Effect of thinning-induced gap size on soil CO2 efflux in a ...

Article Responses of Soil Fungal Populations and Communities to the ...

Article Structure, Richness and Composition of Arboreal Plants in a ...

Article Short- and long-term efficacy of forest thinning to mitigate...

Article Long term thinning and logging in Australian cypress pine fo...

Dear,

Thinning in forestry is the selective removal of trees, primarily undertaken to improve the growth rate or health of the remaining trees. This may be done to make the stand more profitable in an upcoming final felling or to achieve ecological goals such as increasing biodiversity or accelerating the development of desired structural attributes such as large diameter trees with long tree crowns.

Thinning has most been developed as a science in Central Europe. There are significant developments in this by Carlowitz 1713, Dhamel du Monceau 1750, Robert Hartig 1791, Cotta 1817, Seebach 1845, Heyer 1854, Kraft 1884, Borggreve 1891, Biolley 1901 and Schädelin 1934. These methods have been applied outside of Europe to many forests around the world, based on this basis. YRF Overcrowded trees are under competitive stress from their neighbors. Thinning may be done to increase the resistance of the stand to environmental stress such as drought, insect infestation or extreme temperature.

A thinning in which the trees removed have little or no economic value is called a pre-commercial thinning. Ecological Thinning is a variant of this being trialed for use in forest conservation in Australia. Chemical thinning is a form of non-commercial thinning in which the trees are killed while they stand by injecting a chemical such as glyphosate (Round Up) into a cut made in the stem. This reduces the number of live stems remaining, providing a benefit to those that remain and may be undertaken where the cost of a traditional thin is high. It can also be done on very exposed sites where breaking the canopy through a traditional thinning operation would expose the stand to a high risk of windthrow.

Traditionally thinning has been done to create a desired balance between individual tree attributes (such as tree diameter) and per area attributes such as volume. It has been, and often still is, applied with the desire to create uniform stands. Thinning treatments are often described in terms of number of trees per area to remain or average spacing between trees. The intent is to create and manage uniform stands.

Another type of thinning is called variable density thinning. In this type of thinning, the intent is to manage various portions of the stand in different ways to create structural and spatial heterogeneity. The intent is often to increase biodiversity or wildlife habitat. In variable density thinning, some portions of the stand may not be entered. These unentered areas, sometimes called reserves, leave islands, or skips (as they are skipped over) help retain a large range of tree diameters, serve as a future source of competition-related mortality, and may preserve snags, down wood, and understory plants. Other portions of a stand could be heavily thinned or gaps or openings could be created. These areas accelerate the growth rates of trees in the open areas or on their perimeter and help retain or develop long crowns with live branches. Another portion of the stand, sometimes referred to as the matrix, is thinned to result in residual trees densities which area in between the other extremes. Over the whole area, a wide variety of trees with different diameters and species are retained.

Please see the attached link.

Yours sincerely

https://secure.in.gov/dnr/forestry/files/thinningforestplantations.pdf

http://r.search.yahoo.com/_ylt=A9mSs2e8SthWIxgA2JljAQx.;_ylu=X3oDMTByZzJoOXByBGNvbG8DaXIyBHBvcwM0BHZ0aWQDBHNlYwNzcg--/RV=2/RE=1457044285/RO=10/RU=http%3a%2f%2fwww.unce.unr.edu%2fpublications%2ffiles%2fnr%2fother%2ffs9255.pdf/RK=0/RS=YdZ0E6M_CWqDVBhUJrbBt9gLWOw-

Good morning,

I send you this link with a case study in Spain using dendrochronological methodology.

Best wishes

https://www.researchgate.net/publication/259298968_Thinning_has_a_positive_effect_on_growth_dynamics_and_growth-climate_relationships_in_Aleppo_pine_Pinus_halepensis_trees_of_different_crown_classes

Article Thinning has a positive effect on growth dynamics and growth...

Search Mariela Peña-Claro papers for tropical forests.

Thanks guys for sharing your info and views

Dear Mr. Sundaram, Studies addressing the understanding of thinning are very recurrent in forest literature. Each research may focus on different aspects of thinning, as Dr. Hansen pointed very well.

See these two recent papers on thinning effects: Sullivan, TP. 2020. Twenty-Five Years after Stand Thinning and Repeated Fertilization in Lodgepole Pine Forest: Implications for Tree Growth, Stand Structure, and Carbon Sequestration. Forests 11, 337.

Andrade, EM. 2020. Ecohydrology in a Brazilian tropical dry forest: thinned vegetation impact on hydrological functions and ecosystem services. Journal of Hydrology: Regional Studies 27, 100649.