气候变化领域集成服务门户(CCPortal): Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage

CCPortal

DOI	10.1111/gcb.17080
	Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage
	Hansen, Paige M.; Even, Rebecca; King, Alison E.; Lavallee, Jocelyn; Schipanski, Meagan; Cotrufo, M. Francesca
发表日期	2024
ISSN	1354-1013
EISSN	1365-2486
起始页码	30
结束页码	1
卷号	30 期号:1
英文摘要	Identifying controls on soil organic carbon (SOC) storage, and where SOC is most vulnerable to loss, are essential to managing soils for both climate change mitigation and global food security. However, we currently lack a comprehensive understanding of the global drivers of SOC storage, especially with regards to particulate (POC) and mineral-associated organic carbon (MAOC). To better understand hierarchical controls on POC and MAOC, we applied path analyses to SOC fractions, climate (i.e., mean annual temperature [MAT] and mean annual precipitation minus potential evapotranspiration [MAP-PET]), carbon (C) input (i.e., net primary production [NPP]), and soil property data synthesized from 72 published studies, along with data we generated from the National Ecological Observatory Network soil pits (n = 901 total observations). To assess the utility of investigating POC and MAOC separately in understanding SOC storage controls, we then compared these results with another path analysis predicting bulk SOC storage. We found that POC storage is negatively related to MAT and soil pH, while MAOC storage is positively related to NPP and MAP-PET, but negatively related to soil % sand. Our path analysis predicting bulk SOC revealed similar trends but explained less variation in C storage than our POC and MAOC analyses. Given that temperature and pH impose constraints on microbial decomposition, this indicates that POC is primarily controlled by SOC loss processes. In contrast, strong relationships with variables related to plant productivity constraints, moisture, and mineral surface availability for sorption indicate that MAOC is primarily controlled by climate-driven variations in C inputs to the soil, as well as C stabilization mechanisms. Altogether, these results demonstrate that global POC and MAOC storage are controlled by separate environmental variables, further justifying the need to quantify and model these C fractions separately to assess and forecast the responses of SOC storage to global change. Using a global soil organic carbon dataset synthesized from existing literature, we demonstrate that particulate (POC) and mineral-associated organic carbon (MAOC) storage are controlled by distinct environmental variables. Specifically, global POC storage is controlled by variables related to carbon loss processes, while global MAOC storage is controlled by carbon inputs to the soil, moisture, and stabilization mechanisms.image
英文关键词	climate; environmental controls; primary productivity; soil organic carbon fractions; soil properties
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:001129847000001
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306179
作者单位	Colorado State University; Colorado State University; Environmental Defense Fund
推荐引用方式 GB/T 7714	Hansen, Paige M.,Even, Rebecca,King, Alison E.,et al. Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage[J],2024,30(1).
APA	Hansen, Paige M.,Even, Rebecca,King, Alison E.,Lavallee, Jocelyn,Schipanski, Meagan,&Cotrufo, M. Francesca.(2024).Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage.GLOBAL CHANGE BIOLOGY,30(1).
MLA	Hansen, Paige M.,et al."Distinct, direct and climate-mediated environmental controls on global particulate and mineral-associated organic carbon storage".GLOBAL CHANGE BIOLOGY 30.1(2024).