干旱区生态环境知识资源中心(Arid): Interactions of past human disturbance and aridity trigger abrupt shifts in the functional state of Mediterranean holm oak woodlands

Arid

DOI	10.1016/j.catena.2021.105514
	Interactions of past human disturbance and aridity trigger abrupt shifts in the functional state of Mediterranean holm oak woodlands
	Bochet, Esther; Jose Molina, Maria; Monleon, Vicente; Espigares, Tiscar; Manuel Nicolau, Jose; Moreno de Las Heras, Mariano; Garcia-Fayos, Patricio
通讯作者	Bochet, E (corresponding author), UV, Ctr Invest Desertificat CSIC, GV, Carretera Moncada Naquera Km 4-5, Valencia 46113, Spain.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	206
英文摘要	Empirical evidence of the vulnerability of dryland ecosystems to suffer abrupt changes in response to global change is highly needed to assess the applicability of threshold models, understand the underlying mechanisms and anticipate the onset of abrupt shifts. We study the onset of abrupt changes in Mediterranean holm oak (Quercus ilex) woodlands, by analyzing the combined effect of past human disturbance (mainly deforestation) and aridity on the functional state of these ecosystems. We determine ecosystem state in terms of herbaceous/woody species ratio, species richness and soil properties related to carbon and nitrogen cycling and microbial activity. The influence of both drivers was determined along spatial gradients of past human disturbance (from lightly to highly disturbed areas) and aridity (three levels: sub-humid, dry-transition, semi-arid). Our results show a strong interaction between aridity and past human disturbance on soil and vegetation properties. As disturbance increased, soil function decreased linearly in semi-arid and dry-transition conditions, but the trend was non-linear in sub-humid conditions. The latter showed a sharp decline at low-to-moderate disturbance intensity followed by a gentle recovery at higher intensities. These patterns were consistent for all soil properties. Structural changes in vegetation along the disturbance gradient, from open woodlands to shrublands in semi-arid and dry-transition conditions and from dense woodlands to grasslands in sub-humid conditions accompanied the linear vs non-linear patterns in soil function, respectively. Our results evidenced the existence of a critical climatic threshold in the boundary between sub-humid and dry-transition conditions, where the ecosystem switched from a fertile grassland to a highly degraded shrubland at moderate-to-high levels of disturbance (shrub encroachment), losing its capacity to buffer the effects of increasing disturbance. We propose a conceptual model illustrating the ecological mechanisms that may be underlying the onset of such abrupt shift.
英文关键词	Drylands Forest-grassland-shrubland transition Global change Land degradation Plant lifeforms Soil function
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688449100032
WOS关键词	PLANT-SPECIES RICHNESS ; ECOSYSTEM MULTIFUNCTIONALITY ; CLIMATE-CHANGE ; CATASTROPHIC SHIFTS ; SHRUB ENCROACHMENT ; GLOBAL CHANGE ; LAND-USE ; VEGETATION ; FOREST ; DESERTIFICATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362803
作者单位	[Bochet, Esther; Jose Molina, Maria; Moreno de Las Heras, Mariano; Garcia-Fayos, Patricio] UV, Ctr Invest Desertificat CSIC, GV, Carretera Moncada Naquera Km 4-5, Valencia 46113, Spain; [Monleon, Vicente] US Forest Serv, Pacific Northwest Res Stn, Corvallis, OR 97331 USA; [Espigares, Tiscar] Univ Alcala De Henares, Fac Biol Ciencias Ambientales & Quim, Dept Ciencias Vida, Madrid 28805, Spain; [Manuel Nicolau, Jose] Univ Zaragoza, Dept Ciencias Agr & Medio Nat, Escuela Politecn Super Huesca, Huesca 22071, Spain; [Moreno de Las Heras, Mariano] Univ Rey Juan Carlos, Dept Biol & Geol Fis & Quim Inorgan, Area Ecol, Campus Mostoles, Madrid 28933, Spain
推荐引用方式 GB/T 7714	Bochet, Esther,Jose Molina, Maria,Monleon, Vicente,et al. Interactions of past human disturbance and aridity trigger abrupt shifts in the functional state of Mediterranean holm oak woodlands[J],2021,206.
APA	Bochet, Esther.,Jose Molina, Maria.,Monleon, Vicente.,Espigares, Tiscar.,Manuel Nicolau, Jose.,...&Garcia-Fayos, Patricio.(2021).Interactions of past human disturbance and aridity trigger abrupt shifts in the functional state of Mediterranean holm oak woodlands.CATENA,206.
MLA	Bochet, Esther,et al."Interactions of past human disturbance and aridity trigger abrupt shifts in the functional state of Mediterranean holm oak woodlands".CATENA 206(2021).