干旱区生态环境知识资源中心(Arid): Nutrient additions have direct and indirect effects on biocrust biomass in a long-term Chihuahuan Desert grassland experiment

Arid

DOI	10.1016/j.jaridenv.2020.104317
	Nutrient additions have direct and indirect effects on biocrust biomass in a long-term Chihuahuan Desert grassland experiment
	Baldarelli, Lauren M.; Throop, Heather L.; Collins, Scott L.; Ward, David
通讯作者	Baldarelli, LM
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	184
英文摘要	Anthropogenic activities have greatly affected some of the global biogeochemical cycles, including the nitrogen (N) and phosphorus (P) cycles. This alteration of nutrients has significantly impacted ecosystems around the globe. Arid ecosystems may be particularly vulnerable to changes in nutrient availability, in addition to their frequent limitation by water availability. We conducted a nutrient-fertilization experiment with an emphasis on the cover of biological soil crusts (biocrusts) in the Chihuahuan Desert. We manipulated N, P, and Potassium (K) in a full-factorial design. We visually estimated biocrust cover and fluorometrically measured chlorophyll a as an index of biocrust abundance. We found that there were significant interaction effects of NP and NK as well as significant main effects of N and P on chlorophyll a. Results from a path analysis suggest that both N and P had direct positive effects on aboveground vascular plant production and direct negative effects on chlorophyll a. There were also indirect negative effects on biocrust cover and chlorophyll a by vascular plant cover. Overall, nutrient additions had a direct positive effect on vascular plant cover, which in turn had a negative impact on biocrust cover. This indicates a possible mechanism for inter-taxon competition under conditions of increased nutrient availability.
英文关键词	Biological soil crusts Sevilleta long-term ecological research Nutrient fertilization Nutrient network Inter-taxon competition Path analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579976600017
WOS关键词	BIOLOGICAL SOIL CRUSTS ; BIOGEOCHEMICAL CYCLES ; MULTIMODEL INFERENCE ; BEHAVIORAL ECOLOGY ; MODEL SELECTION ; NITROGEN ; DEPOSITION ; RESPIRATION ; LIMITATION ; RESPONSES
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327930
作者单位	[Baldarelli, Lauren M.; Ward, David] Kent State Univ, Dept Biol Sci, Kent, OH 44242 USA; [Throop, Heather L.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA; [Throop, Heather L.] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA; [Collins, Scott L.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
推荐引用方式 GB/T 7714	Baldarelli, Lauren M.,Throop, Heather L.,Collins, Scott L.,et al. Nutrient additions have direct and indirect effects on biocrust biomass in a long-term Chihuahuan Desert grassland experiment[J]. Arizona State University,2021,184.
APA	Baldarelli, Lauren M.,Throop, Heather L.,Collins, Scott L.,&Ward, David.(2021).Nutrient additions have direct and indirect effects on biocrust biomass in a long-term Chihuahuan Desert grassland experiment.JOURNAL OF ARID ENVIRONMENTS,184.
MLA	Baldarelli, Lauren M.,et al."Nutrient additions have direct and indirect effects on biocrust biomass in a long-term Chihuahuan Desert grassland experiment".JOURNAL OF ARID ENVIRONMENTS 184(2021).