气候变化领域集成服务门户(CCPortal): Vertical distribution patterns of community biomass, carbon and nitrogen content in grasslands on the eastern Qinghai-Tibet Plateau

CCPortal

DOI	10.1016/j.ecolind.2023.110726
	Vertical distribution patterns of community biomass, carbon and nitrogen content in grasslands on the eastern Qinghai-Tibet Plateau
	Zhang, Yajie; Zhou, Tao; Liu, Xia; Xu, Yixin; Zeng, Jingyu; Zhang, Jingzhou
发表日期	2023
ISSN	1470-160X
EISSN	1872-7034
卷号	154
英文摘要	The accumulation, transport and distribution of photosynthates within plants not only affect the ratio of shoot-toroot biomass, but also change the distribution pattern of nutrient elements in different organs and tissues. A full understanding of the allocation patterns of biomass and nutrient elements within plants, is helpful to strengthen our understanding of the above- and belowground ecosystem functions. However, at present, we do not know enough about the aboveground-belowground allocation of biomass, carbon (C) and nitrogen (N) contents, and, in particular, the corresponding vertical distribution pattern belowground and its environmental impact. At the community scale, the changes in vegetation community attributes measured in the field can reflect the long-term adaptation and subsequent adaptation strategies of vegetation to the regional environment and environmental changes. In this study, the vertical distribution patterns of community biomass and the carbon and nitrogen contents with soil depth in an alpine grassland on the eastern Qinghai-Tibet Plateau were investigated based on the transect method. Our results show the following: (1) Alpine grasslands can respond to differences in hydrothermal resource availability by changing biomass allocation patterns. In low-temperature and high-humidity environments, aboveground and belowground biomass allocation supports the isometric growth hypothesis. However, in environments with less soil moisture or high temperature and humidity, the aboveground and belowground biomass distributions support the allometric allocation hypothesis. (2) The vertical distribution patterns of the C content, N content and carbon: nitrogen ratio (C:N) within plants are different. From the leaves to the root system, with the increase in root depth, the C content demonstrated a vertical distribution pattern of first decreasing and then increasing, and the N% demonstrated a gradual decreasing distribution pattern, while the C:N ratio demonstrated an exponential increasing distribution pattern. (3) The change rate in C%, N% and C: N related to the soil depth was affected by environmental hydrothermal conditions. C% and C:N ratio changed more rapidly with root depth under low temperature and high humidity. The change rate of N% was mainly affected by temperature and changed more rapidly with root depth at low temperatures. (4) When exploring the relationship between the content of elements within plants, it is necessary to combine both the above- and belowground compartments. There was a nonlinear quadratic relationship between the carbon and nitrogen contents within plants.
关键词	Biomass allocation Carbon and nitrogen content Vertical distribution patterns Eastern Qinghai-Tibet Plateau
英文关键词	BELOW-GROUND BIOMASS; SOIL ORGANIC-MATTER; ECOLOGICAL STOICHIOMETRY; FUNCTIONAL TRAITS; SEQUESTRATION; ALLOCATION; PLANTS; SHOOT; ROOT; DECOMPOSITION
WOS研究方向	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:001052319000001
来源期刊	ECOLOGICAL INDICATORS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282936
作者单位	Beijing Normal University; Beijing Normal University; Beijing Normal University
推荐引用方式 GB/T 7714	Zhang, Yajie,Zhou, Tao,Liu, Xia,et al. Vertical distribution patterns of community biomass, carbon and nitrogen content in grasslands on the eastern Qinghai-Tibet Plateau[J],2023,154.
APA	Zhang, Yajie,Zhou, Tao,Liu, Xia,Xu, Yixin,Zeng, Jingyu,&Zhang, Jingzhou.(2023).Vertical distribution patterns of community biomass, carbon and nitrogen content in grasslands on the eastern Qinghai-Tibet Plateau.ECOLOGICAL INDICATORS,154.
MLA	Zhang, Yajie,et al."Vertical distribution patterns of community biomass, carbon and nitrogen content in grasslands on the eastern Qinghai-Tibet Plateau".ECOLOGICAL INDICATORS 154(2023).