It is not just a ‘trade‐off’: : indications for sink‐ and source‐limitation to vegetative and regenerative growth in an old‐growth beech forest

Summary Controls on tree growth are key issues in plant physiology. The hypothesis of our study was that the interannual variability of wood and fruit production are primarily controlled directly by weather conditions (sink limitation), while carbon assimilation (source limitation) plays a secondary role. We analyzed the interannual variability of weather conditions, gross primary productivity (GPP) and net primary productivity (NPP) of wood and fruits of an old‐growth, unmanaged Fagus sylvatica forest over 14 yr, including six mast years. In a multiple linear regression model, c . 71% of the annual variation in wood‐NPP could be explained by mean air temperature in May, precipitation from April to May (positive influence) and fruit‐NPP (negative influence). GPP of June to July solely explained c . 42% of the variation in wood‐NPP. Fruit‐NPP was positively related to summer precipitation 2 yr before ( R 2 = 0.85), and negatively to precipitation in May ( R 2 = 0.83) in the fruit years. GPP had no influence on fruit‐NPP. Our results suggest a complex system of sink and source limitations to tree growth driven by weather conditions and going beyond a simple carbon‐mediated ‘trade‐off’ between regenerative and vegetative growth

Quantifying recreational value and the functional relationship between travel cost and visiting national park

Abstract Estimation of recreational benefits is an important tool for both biodiversity conservation and ecotourism development in national parks and sanctuaries. The design of this work is to estimate the recreational value and to establish functional relationship between travel cost and visitation of Lawachara National Park (LNP) in Bangladesh. This study employed zonal approach of the travel cost method. The work is grounded on a sample of 422 visitors of the LNP. Results showed that the total value of environmental assets of the LNP is 55,694,173 Taka/Year. Moreover, our suggestion based on visitors' willingness to pay is that the park entrance fee of 25 Tk per person should be introduced that could generate revenue approximate 2.3 million Taka/ year, beneficial for the park management and conservation of biodiversity

Quantifying Recreational Value and the Functional Relationship Between Travel Cost and Visiting National Park

Abstract Estimation of recreational benefits is an important tool for both biodiversity conservation and ecotourism development in national parks and sanctuaries. The design of this work is to estimate the recreational value and to establish functional relationship between travel cost and visitation of Lawachara National Park (LNP) in Bangladesh. This study employed zonal approach of the travel cost method. The work is grounded on a sample of 422 visitors of the LNP. Results showed that the total value of environmental assets of the LNP is 55,694,173 Taka/Year. Moreover, our suggestion based on visitors' willingness to pay is that the park entrance fee of 25 Tk per person should be introduced that could generate revenue approximate 2.3 million Taka/ year, beneficial for the park management and conservation of biodiversity

Replication Data for: the chapter four of phd thesis entitled 'Implications of forest structure on carbon dioxide fluxes'.

The dataverse contains data, plots and Rcodes for the fourth chapter of phd thesis entitled 'Implications of forest structure on carbon dioxide fluxes'

Replication Data for: Chapter three of 'Implications of forest structure on carbon dioxide fluxes'

This dataset contains plots, data and Rcodes for the third chapter of 'Implications of forest structure on carbon dioxide fluxes'