干旱区生态环境知识资源中心(Arid): Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems

Arid

DOI	10.1007/s11104-019-04102-0
	Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems
	Chung, Y. Anny 1,2,3; Thornton, Bradly 3,4; Dettweiler-Robinson, Eva 3; Rudgers, Jennifer A.3
通讯作者	Chung, Y. Anny
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2019
卷号	441 期号:1-2 页码:147-159
英文摘要	Aims Biological soil crusts (biocrusts) dominate soil surfaces in drylands, providing services that include soil stabilization and carbon uptake. In this study, we investigated the direct and biocrust-mediated effects of anthropogenic disturbances in two dryland ecosystems. Methods We applied low intensity soil surface disturbance (twice-yearly footfalls) in grassland and shrubland ecosystems in northern Chihuahuan Desert, USA. Results After five years of disturbance, biocrust photosynthetic capacity (chlorophyll a) declined by 44%. Declines were largest in interspaces between grassland plants. Levels of scytonemin, a biocrust sunscreen pigment, were 38% greater in shrubland than grassland and 44% greater under grass canopy than in interspaces, but decreased only 5% with disturbance. Disturbance reduced soil surface stability 2 times more in the grassland than shrubland. Disturbance effects on other hydrologic and physical properties were indirectly mediated by the photosynthetic capacity of biocrusts. Disturbance indirectly increased infiltration depth and shallow (2-3 cm) soil moisture in the grassland but reduced surface moisture (<1 cm) in the shrubland. Conclusions Biocrusts were more sensitive to low intensity soil disturbance in a grassland than shrubland ecosystem. While biocrusts mediated the effects of soil disturbance on dryland soil hydrological and physical properties, the nature of their influence differed between ecosystem types.
英文关键词	Biocrust Bouteloua Soil stability Ecohydrology Larrea tridentata Sevilleta LTER
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000482412400009
WOS关键词	PHYSICAL DISTURBANCE ; MICROBIOTIC CRUSTS ; INFILTRATION ; COMPACTION ; COMMUNITIES ; STABILITY ; RESPONSES ; IMPACTS ; EROSION ; NEGEV
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218002
作者单位	1.Univ Georgia, Dept Plant Biol, Athens, GA 30602 USA; 2.Univ Georgia, Dept Plant Pathol, Athens, GA 30602 USA; 3.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 4.Truman State Univ, Dept Biol, Kirksville, MO 63501 USA
推荐引用方式 GB/T 7714	Chung, Y. Anny,Thornton, Bradly,Dettweiler-Robinson, Eva,et al. Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems[J],2019,441(1-2):147-159.
APA	Chung, Y. Anny,Thornton, Bradly,Dettweiler-Robinson, Eva,&Rudgers, Jennifer A..(2019).Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems.PLANT AND SOIL,441(1-2),147-159.
MLA	Chung, Y. Anny,et al."Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems".PLANT AND SOIL 441.1-2(2019):147-159.