干旱区生态环境知识资源中心(Arid): Effects comparison of co-occurring Vachellia tree species on understory herbaceous vegetation biomass and soil nutrient: Case of semi-arid savanna grasslands in southern Ethiopia

Arid

DOI	10.1016/j.jaridenv.2021.104527
	Effects comparison of co-occurring Vachellia tree species on understory herbaceous vegetation biomass and soil nutrient: Case of semi-arid savanna grasslands in southern Ethiopia
	Bora, Zinabu; Wang, Yongdong; Xu, Xinwen; Angassa, Ayana; You, Yuan
通讯作者	Bora, Z (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Wang, YD (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Natl Engn Technol Res Ctr Desert Oasis Ecol Const, 818 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	190
英文摘要	The spread of woody plant encroachment is a major concern as it adversely affects herbaceous plant community composition in a savanna ecosystem. Assessing the canopy effects of co-occurring encroaching and nonencroaching woody plant species on the understory herbaceous vegetation biomass and the soil nutrient status can improve our understandings of the link between biological invasions and herbaceous plant community ecology. We examined the canopy and adjacent inter-canopy effects of encroaching and non-encroaching Vachellia species which was previously known as Acacia on herbaceous vegetation biomass in Southern Ethiopia. A total of 12 encroaching (Vachellia drepanolobium) and 12 non-encroaching (Vachellia tortilis) tree species were selected both at an upland and a bottomland site. A 1 m x 1 m quadrat was used to investigate the canopy effects of individual tree species and inter-canopy habitats on herbaceous vegetation biomass. Soil samples were collected under the canopy of selected tree species and the adjacent inter-canopy habitat at a depth of 0-10 cm and 10-20 cm both at the upland and bottomland site. With fixed effect ANOVA, we evaluated the effects of landforms (upland or bottomland), tree species (Vachellia drepanolobium or Vachellia tortilis) and habitats (canopy or inter-canopy habitat) on total herbaceous biomass, perennial herbaceous species biomass and annual herbaceous species biomass. There was no significant (P 0.05) difference between the canopy and intercanopy habitat of V. drepanolobium and V. tortilis in terms of the total herbaceous biomass and annual herbaceous vegetation at the bottomland position. The canopy of V. drepanolobium had a negative effect on the biomass production of herbaceous perennial species both at the bottomland and upland site. On the contrary, the canopy of V. tortilis had a significantly positive (P < 0.05) effect on the biomass production of herbaceous perennial plants at the bottomland site. Generally, more soil organic matter accumulation was recorded under the canopy of V. tortilis than it was either under the canopy of V. drepanolobium or in the open savanna grasslands. Our findings indicated that encroaching tree species canopy and co-occurring non-encroaching tree species canopy had a predominantly different influence on herbaceous vegetation biomass. It seemed that encroaching tree species in savannas had a high acquisition and competition for resources. The findings can help improve our understanding on the herbaceous biomass predictions of different life forms in a community of encroached grasslands and non-encroached grasslands in southern Ethiopia.
英文关键词	Acacia species Canopy dependence Encroachment Tree species effect Savanna grasslands Canopy
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000656219500001
WOS关键词	ENCROACHMENT ; DYNAMICS ; DESERTIFICATION ; MECHANISMS ; DENSITY ; QUALITY ; TRAITS ; PLANTS ; AREAS ; WATER
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350713
作者单位	[Bora, Zinabu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Bora, Zinabu; Wang, Yongdong; Xu, Xinwen; You, Yuan] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Natl Engn Technol Res Ctr Desert Oasis Ecol Const, 818 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China; [Bora, Zinabu] Oromia Pastoral Area Dev Coordinat Commiss, POB 20120, Addis Ababa, Ethiopia; [Angassa, Ayana] Botswana Univ Agr & Nat Resources, Fac Nat Resources, Dept Range & Forest Resources, Private Bag 0027, Gaborone, Botswana
推荐引用方式 GB/T 7714	Bora, Zinabu,Wang, Yongdong,Xu, Xinwen,et al. Effects comparison of co-occurring Vachellia tree species on understory herbaceous vegetation biomass and soil nutrient: Case of semi-arid savanna grasslands in southern Ethiopia[J]. 中国科学院新疆生态与地理研究所,2021,190.
APA	Bora, Zinabu,Wang, Yongdong,Xu, Xinwen,Angassa, Ayana,&You, Yuan.(2021).Effects comparison of co-occurring Vachellia tree species on understory herbaceous vegetation biomass and soil nutrient: Case of semi-arid savanna grasslands in southern Ethiopia.JOURNAL OF ARID ENVIRONMENTS,190.
MLA	Bora, Zinabu,et al."Effects comparison of co-occurring Vachellia tree species on understory herbaceous vegetation biomass and soil nutrient: Case of semi-arid savanna grasslands in southern Ethiopia".JOURNAL OF ARID ENVIRONMENTS 190(2021).