Response mechanism of photosynthetic physiology of uneven aged leaves of to sunflecks in broad-leaved Korean pine forest in Changbai Mountain, China.

To investigate the photosynthetic responses of needles with different ages (current-year and annual-year) in to sunflecks along the vertical gradient of canopy, we conducted an experiment at the Changbai Mountain Forest Ecosystem Positioning Station utilizing a canopy tower crane platform. We selected current-year and annual-year needles from the upper (mean height: 23.26 m), middle (16.

[Extraction of land-cover and wetland area in Bohai Rim region based on Google Earth Engine.].

The land cover of Bohai Rim region has changed greatly due to urbanization and economic development. Monitoring the land cover with high accuracy and real time is the most important basis for relevant researches. Traditional single-machine processing mode is difficult to realize rapid monitoring for large-scale and long-time series.

[Variation characteristics of NDVI and its response to climatic change in the growing season of Changbai Mountain Nature Reserve during 2001 and 2018].

To understand the dynamics of temperate forest in Northeast Asia and its response to climate change under the scenario of global change, we examined the temporal and spatial changes of normalized difference vegetation index (NDVI) and their correlation with temperature and precipitation of Changbai Mountain Nature Reserve in the growing season during 2001 and 2018, based on the remote sensing database of MODIS with a resolution of 250 m, land surface temperature data with a resolution of 1 km and meteorological data in the studied and surrounding area. The results showed that, in the growing season of 2001-2018, the averaged NDVI value of the study area was 0.711.