DOI: 10.1111/ele.13644
论文题名: Landscape modification and nutrient-driven instability at a distance
作者: McCann K.S. ; Cazelles K. ; MacDougall A.S. ; Fussmann G.F. ; Bieg C. ; Cristescu M. ; Fryxell J.M. ; Gellner G. ; Lapointe B. ; Gonzalez A.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期: 3 起始页码: 398
结束页码: 414
语种: 英语
中文关键词: Connectivity
; global change
; nutrients
; stability
; theory
英文关键词: anthropogenic effect
; ecological theory
; ecosystem function
; exclusion experiment
; food web
; landscape ecology
; nutrient dynamics
; species diversity
; ecosystem
; food chain
; human
; Ecosystem
; Food Chain
; Humans
; Nutrients
英文摘要: Almost 50 years ago, Michael Rosenzweig pointed out that nutrient addition can destabilise food webs, leading to loss of species and reduced ecosystem function through the paradox of enrichment. Around the same time, David Tilman demonstrated that increased nutrient loading would also be expected to cause competitive exclusion leading to deleterious changes in food web diversity. While both concepts have greatly illuminated general diversity-stability theory, we currently lack a coherent framework to predict how nutrients influence food web stability across a landscape. This is a vitally important gap in our understanding, given mounting evidence of serious ecological disruption arising from anthropogenic displacement of resources and organisms. Here, we combine contemporary theory on food webs and meta-ecosystems to show that nutrient additions are indeed expected to drive loss in stability and function in human-impacted regions. Our models suggest that destabilisation is more likely to be caused by the complete loss of an equilibrium due to edible plant species being competitively excluded. In highly modified landscapes, spatial nutrient transport theory suggests that such instabilities can be amplified over vast distances from the sites of nutrient addition. Consistent with this theoretical synthesis, the empirical frequency of these distant propagating ecosystem imbalances appears to be growing. This synthesis of theory and empirical data suggests that human modification of the Earth is strongly connecting distantly separated ecosystems, causing rapid, expansive and costly nutrient-driven instabilities over vast areas of the planet. Similar to existing food web theory, the corollary to this spatial nutrient theory is that slowing down spatial nutrient pathways can be a potent means of stabilising degraded ecosystems. © 2020 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166881
Appears in Collections: 气候变化与战略
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作者单位: University of Guelph, 50 Stone Road, Guelph Ontario, N1G 2W1, Canada; McGill University, 1205 Dr-Penfield Ave, Montreal, QC H3A 1B1, Canada; Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
Recommended Citation:
McCann K.S.,Cazelles K.,MacDougall A.S.,et al. Landscape modification and nutrient-driven instability at a distance[J]. Ecology Letters,2021-01-01,24(3)