Soil gross N ammonification and nitrification from tropical to temperate forests in eastern China

Changhui Wang, Nannan Wang, Jianxing Zhu, Yuan Liu, Xiaofeng Xu, Shuli Niu, Guirui Yu, Xingguo Han, Nianpeng He   Soil ammonium is a key nutrient for plant growth. The availability of soil ammonium is controlled by two primary microbial processes: nitrogen ammonification (the conversion of organic nitrogen into ammonia) and nitrification (the conversion of ammonium to nitrate). Large-scale patterns of gross ammonification and gross nitrification … Continue reading Soil gross N ammonification and nitrification from tropical to temperate forests in eastern China

Root morphology and nutrient are driven by different selective pressures

Ruili Wang, Qiufeng Wang, Ning Zhao, Zhiwei Xu, Xianjin Zhu, Cuicui Jiao, Guirui Yu and Nianpeng He Fine roots are the smallest terminal parts of the root system and act as the primary belowground organs in acquiring limiting nutrients and water from the soil. However, inconsistency in definitions of fine roots and different protocols among studies have meant that knowledge of root system traits has, … Continue reading Root morphology and nutrient are driven by different selective pressures

C:N:P stoichiometry in China’s forests: from organs to ecosystems

Jiahui Zhang, Ning Zhao, Congcong Liu, Hao Yang, ML Li, Guirui Yu, Kevin Wilcox, Qiang Yu, Nianpeng He   Mineral nutrient elements have received wide attention in forest ecosystems because more than 16 elements support the growth and development of plants. Carbon (C, the main element of both structure and energy, i.e. sugars), nitrogen (N, key element of protein), and phosphorus (P, key element of … Continue reading C:N:P stoichiometry in China’s forests: from organs to ecosystems

An overall view of the study sites and experiment design of N and P addition (Photos provided by authors). DHS, a subtropical forest of Dinghu Mountain (DHS, 23°9′41″N, 112°32′36″E); JGS, a warm-temperate forest of Jigong Mountain (JGS, 31°51'58''N, 114°5'12''E); CBS, a cold-temperate forest of Changbai Mountain (CBS, 42°24′2″N, 128°05′42″E).

Size-dependent nutrient limitation of tree growth from subtropical to cold temperate forests

Yong Li, Dashuan Tian, Hao Yang and Shuli Niu The pattern of nutrient limitation is fundamental to terrestrial productivity and its response to global changes. The traditional view is that plant growth is primarily limited by phosphorus (P) in tropical forest and by nitrogen (N) in cold temperate forest, while warm-temperate forest (a mid-latitude ecosystem) should be co-limited by N and P. However, this traditional … Continue reading Size-dependent nutrient limitation of tree growth from subtropical to cold temperate forests

Variation of stomatal traits from cold-temperate tropical to tropical cold-temperate forests and association with water use efficiency

Congcong Liu, Nianpeng He, Jiahui Zhang, Ying Li, Qiufeng Wang, Lawren Sack, Guirui Yu   Stomata, pores that are bounded by two guard cells and distributed over the leaf surface, control the uptake of CO2 for photosynthesis and the concomitant loss of water vapor from leaves. Therefore, the morphology and behavior of stomata can reflect the adaptive strategy of plants to some extent. However, the … Continue reading Variation of stomatal traits from cold-temperate tropical to tropical cold-temperate forests and association with water use efficiency

Soil organic matter availability and climate drive latitudinal patterns in bacterial diversity from tropical to cold-temperate forests

Jing Tiana, Nianpeng He, Lauren Hale, Shuli Niu, Guirui Yua, Yuan Liu, Evgenia Blagodatskaya, Yakov Kuzyakov, Qun Gao and Jizhong Zhou Patterns of variation in plant diversity at local, regional and global scales have been extensively studied. But despite the crucial role of bacteria for terrestrial ecosystem functioning, our understanding of their large-scale biogeography patterns in different forests lags significantly behind that of larger organisms. … Continue reading Soil organic matter availability and climate drive latitudinal patterns in bacterial diversity from tropical to cold-temperate forests

Root elemental composition in Chinese forests changes in response to environment and competition

Ning Zhao, Huming Liu, Qiufeng Wang, Ruili Wang, Zhiwei Xu, Cuicui Jiao, Jianxing Zhu, Guirui Yu, Nianpeng He How can many plant species co-occur at a given place to form a community? Are there general rules for how plant species are assembled into communities? Ecologists have suggested that the environment and competition between species act like nested sieves in this assembly process. The environment sieves … Continue reading Root elemental composition in Chinese forests changes in response to environment and competition

Phosphatase kinetics in forest soils

Xinyu Zhang, Yang Yang, Chuang Zhang, ShuliNiu, Hao Yang, Guirui Yu, Huimin Wang, EvgeniaBlagodatskaya, YakovKuzyakov, DashuanTian, Yuqian Tang, Shuang Liu, Xiaomin Sun   Global changes including increases in nitrogen (N) deposition and phosphorus (P) fertilization may cause changes in the nutrient demands of plants and microbes. Soil phosphatase enzymes that are produced by plants and microbes transform a significant portion of organic P to P … Continue reading Phosphatase kinetics in forest soils

Variation in leaf anatomical traits from tropical to cold-temperate forests and linkage to ecosystem functions

Nianpeng He, Congcong Liu, Miao Tian, Meiling Li, Hao Yang, Guirui Yu, Dali Guo, Melinda D Smith, Qiang Yu, Jihua Hou Leaves play key roles in photosynthesis and long-term adaptation to the environment. Therefore, leaf anatomical traits, such as leaf thickness and ratios of different tissues in leaves, may reflect a plant’s adaptation to environmental changes and influence photosynthesis to some extent, because they regulate … Continue reading Variation in leaf anatomical traits from tropical to cold-temperate forests and linkage to ecosystem functions

Soil and vegetation carbon turnover times from tropical to boreal forests

Jinsong Wang, Jian Sun, Jianyang Xia, Nianpeng He, Meiling Li and Shuli Niu Part of an upcoming Special Feature on Functional Traits Along a Transect! Carbon (C) storage in terrestrial ecosystems is the balance between photosynthetic inputs and C losses by respiration. However, the large variations in the time that C stays in different ecosystem compartments (e.g. vegetation, soils) have challenged our ability to model … Continue reading Soil and vegetation carbon turnover times from tropical to boreal forests